A. Ferrière, S. Chomette, E. Rojas, J. Caruncho, T. Fluri, Daniel Ipse, R. Aumann, Marie Prouteau, J. Falsig
The POLYPHEM project is a research and innovation action funded by the European Union’s H2020 program. The project started in April 2018 and will end in March 2022. It is implemented by a European ...
{"title":"The POLYPHEM project: An innovative small-scale solar thermal combined cycle","authors":"A. Ferrière, S. Chomette, E. Rojas, J. Caruncho, T. Fluri, Daniel Ipse, R. Aumann, Marie Prouteau, J. Falsig","doi":"10.1063/1.5117534","DOIUrl":"https://doi.org/10.1063/1.5117534","url":null,"abstract":"The POLYPHEM project is a research and innovation action funded by the European Union’s H2020 program. The project started in April 2018 and will end in March 2022. It is implemented by a European ...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"144 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79928549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Wolfertstetter, S. Wilbert, Felix Terhag, N. Hanrieder, A. Fernández-García, C. Sansom, P. King, L. Zarzalejo, A. Ghennioui
Concentrating solar power (CSP) plants are often located in dusty environments. Soiling depends strongly on location, time, weather conditions and mirror orientation and is characterized by the soiling rate: the loss of the specular reflectance due to soiling per time interval. The average soiling rate can reach 2%/day on sites with heavy dust loads such as the Arabian Peninsula. On some days (for example during a sandstorm) the soiling rate can be significantly higher than that. Measurement campaigns for the soiling rate are of interest for the CSP plant site selection and the plant design, but they are time consuming and costly. In this study, a soiling model is presented that describes particle deposition processes based on physical equations from where the soiling rate can be derived. The model uses easily measureable meteorological parameters such as aerosol particle number concentration, wind speed and direction at 10 m height, relative humidity, temperature and precipitation as input parameters. The model has been optimized and validated using measurement data from two sites in Morocco and Spain. The measurement data have been divided into two parts. One was used to find optimum model parameters by parameterization. The second dataset was used to validate the model. The model reaches a bias of 0.1%/d and a root mean square deviation of 0.4 %/d. Days with weak soiling (<1%/d) rates are identified with an accuracy of more than 90 %, the question whether or not the soiling rate is above 1%/d is answered correctly in 85 % of the cases.Concentrating solar power (CSP) plants are often located in dusty environments. Soiling depends strongly on location, time, weather conditions and mirror orientation and is characterized by the soiling rate: the loss of the specular reflectance due to soiling per time interval. The average soiling rate can reach 2%/day on sites with heavy dust loads such as the Arabian Peninsula. On some days (for example during a sandstorm) the soiling rate can be significantly higher than that. Measurement campaigns for the soiling rate are of interest for the CSP plant site selection and the plant design, but they are time consuming and costly. In this study, a soiling model is presented that describes particle deposition processes based on physical equations from where the soiling rate can be derived. The model uses easily measureable meteorological parameters such as aerosol particle number concentration, wind speed and direction at 10 m height, relative humidity, temperature and precipitation as input parameters. Th...
{"title":"Modelling the soiling rate: Dependencies on meteorological parameters","authors":"F. Wolfertstetter, S. Wilbert, Felix Terhag, N. Hanrieder, A. Fernández-García, C. Sansom, P. King, L. Zarzalejo, A. Ghennioui","doi":"10.1063/1.5117715","DOIUrl":"https://doi.org/10.1063/1.5117715","url":null,"abstract":"Concentrating solar power (CSP) plants are often located in dusty environments. Soiling depends strongly on location, time, weather conditions and mirror orientation and is characterized by the soiling rate: the loss of the specular reflectance due to soiling per time interval. The average soiling rate can reach 2%/day on sites with heavy dust loads such as the Arabian Peninsula. On some days (for example during a sandstorm) the soiling rate can be significantly higher than that. Measurement campaigns for the soiling rate are of interest for the CSP plant site selection and the plant design, but they are time consuming and costly. In this study, a soiling model is presented that describes particle deposition processes based on physical equations from where the soiling rate can be derived. The model uses easily measureable meteorological parameters such as aerosol particle number concentration, wind speed and direction at 10 m height, relative humidity, temperature and precipitation as input parameters. The model has been optimized and validated using measurement data from two sites in Morocco and Spain. The measurement data have been divided into two parts. One was used to find optimum model parameters by parameterization. The second dataset was used to validate the model. The model reaches a bias of 0.1%/d and a root mean square deviation of 0.4 %/d. Days with weak soiling (<1%/d) rates are identified with an accuracy of more than 90 %, the question whether or not the soiling rate is above 1%/d is answered correctly in 85 % of the cases.Concentrating solar power (CSP) plants are often located in dusty environments. Soiling depends strongly on location, time, weather conditions and mirror orientation and is characterized by the soiling rate: the loss of the specular reflectance due to soiling per time interval. The average soiling rate can reach 2%/day on sites with heavy dust loads such as the Arabian Peninsula. On some days (for example during a sandstorm) the soiling rate can be significantly higher than that. Measurement campaigns for the soiling rate are of interest for the CSP plant site selection and the plant design, but they are time consuming and costly. In this study, a soiling model is presented that describes particle deposition processes based on physical equations from where the soiling rate can be derived. The model uses easily measureable meteorological parameters such as aerosol particle number concentration, wind speed and direction at 10 m height, relative humidity, temperature and precipitation as input parameters. Th...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84534600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective of this article is to show and discuss the shape accuracy of solar reflector panels for linear Fresnel collectors. Systematic shape deviations due to torsion or orientation errors are responsible for severe optical losses and underperformance. This is why this article investigates systematic surface deviations beyond the standard quality parameters like SDx and FDy. We discuss typical characteristics of linear Fresnel collector reflector panels. Our measurement results show local surface slope deviations measured by deflectometry. In the second part of this study, the effect of systematic surface slope deviations is analyzed by use of a parametric model. We apply the model to detect systematic production errors, investigate optical losses and the impact on the focal line with ray tracing.Objective of this article is to show and discuss the shape accuracy of solar reflector panels for linear Fresnel collectors. Systematic shape deviations due to torsion or orientation errors are responsible for severe optical losses and underperformance. This is why this article investigates systematic surface deviations beyond the standard quality parameters like SDx and FDy. We discuss typical characteristics of linear Fresnel collector reflector panels. Our measurement results show local surface slope deviations measured by deflectometry. In the second part of this study, the effect of systematic surface slope deviations is analyzed by use of a parametric model. We apply the model to detect systematic production errors, investigate optical losses and the impact on the focal line with ray tracing.
{"title":"Linear Fresnel collector mirrors – Measured systematic surface errors and their impact on the focal line","authors":"A. Heimsath, P. Schöttl, G. Bern, P. Nitz","doi":"10.1063/1.5117612","DOIUrl":"https://doi.org/10.1063/1.5117612","url":null,"abstract":"Objective of this article is to show and discuss the shape accuracy of solar reflector panels for linear Fresnel collectors. Systematic shape deviations due to torsion or orientation errors are responsible for severe optical losses and underperformance. This is why this article investigates systematic surface deviations beyond the standard quality parameters like SDx and FDy. We discuss typical characteristics of linear Fresnel collector reflector panels. Our measurement results show local surface slope deviations measured by deflectometry. In the second part of this study, the effect of systematic surface slope deviations is analyzed by use of a parametric model. We apply the model to detect systematic production errors, investigate optical losses and the impact on the focal line with ray tracing.Objective of this article is to show and discuss the shape accuracy of solar reflector panels for linear Fresnel collectors. Systematic shape deviations due to torsion or orientation errors are responsible for severe optical losses and underperformance. This is why this article investigates systematic surface deviations beyond the standard quality parameters like SDx and FDy. We discuss typical characteristics of linear Fresnel collector reflector panels. Our measurement results show local surface slope deviations measured by deflectometry. In the second part of this study, the effect of systematic surface slope deviations is analyzed by use of a parametric model. We apply the model to detect systematic production errors, investigate optical losses and the impact on the focal line with ray tracing.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83848694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Avila-Marin, Á. Morales, R. Monterreal, J. Fernández-Reche
Porous materials are been widely used in many solar applications such as thermal energy storage, porous receiver and thermo-chemical reactions. This work deals with the thermal analysis of different configurations of alumina pebbles, which can be used for the aforementioned applications. The alumina has lot of advantages; however its color is white diminishing the possible concentrated applications. In order to increase the solar absorptance, the alumina pebbles has been coated with two different coatings, a commercial one and a self-developed spinel coating. The main tests performed shows that the coating developed by CIEMAT-PSA increase the performance of the packed bed configuration compared to the Pyromark coating.
{"title":"Non-selective coating for porous materials used for solar thermal applications","authors":"A. Avila-Marin, Á. Morales, R. Monterreal, J. Fernández-Reche","doi":"10.1063/1.5117519","DOIUrl":"https://doi.org/10.1063/1.5117519","url":null,"abstract":"Porous materials are been widely used in many solar applications such as thermal energy storage, porous receiver and thermo-chemical reactions. This work deals with the thermal analysis of different configurations of alumina pebbles, which can be used for the aforementioned applications. The alumina has lot of advantages; however its color is white diminishing the possible concentrated applications. In order to increase the solar absorptance, the alumina pebbles has been coated with two different coatings, a commercial one and a self-developed spinel coating. The main tests performed shows that the coating developed by CIEMAT-PSA increase the performance of the packed bed configuration compared to the Pyromark coating.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91373428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiangyu Xie, G. Xiao, M. Ni, Jian-hua Yan, H. Dong, K. Cen
A novel particle receiver is proposed and tried to improve the flexibility of control, the reliability and the efficiency of the existing solar particle receivers. The novel particle receiver is mainly composed of an inclined plate where the particles flow due to gravity and absorb concentrating radiation directly meanwhile, and a pneumatic control system where the particle flow rate can be regulated by fluidization gas. The performance has been experimentally and numerically investigated preliminarily. The experimental results of cold tests show that the solid-gas ratio can reach up to ∼25 for different cross sections, indicating that the heat loss caused by fluidization gas is acceptable, usually less than 2%, and particle flow rate could be adjusted flexibly. The experimental results of hot test show that the outlet temperature of particle flow ranges from ∼709 K to ∼938 K and the average outlet temperature of particle flow is ∼807 K under the incident radiation power of ∼8 kw and the particle flow rat...
{"title":"Optical and thermal performance of a novel solar particle receiver","authors":"Xiangyu Xie, G. Xiao, M. Ni, Jian-hua Yan, H. Dong, K. Cen","doi":"10.1063/1.5117577","DOIUrl":"https://doi.org/10.1063/1.5117577","url":null,"abstract":"A novel particle receiver is proposed and tried to improve the flexibility of control, the reliability and the efficiency of the existing solar particle receivers. The novel particle receiver is mainly composed of an inclined plate where the particles flow due to gravity and absorb concentrating radiation directly meanwhile, and a pneumatic control system where the particle flow rate can be regulated by fluidization gas. The performance has been experimentally and numerically investigated preliminarily. The experimental results of cold tests show that the solid-gas ratio can reach up to ∼25 for different cross sections, indicating that the heat loss caused by fluidization gas is acceptable, usually less than 2%, and particle flow rate could be adjusted flexibly. The experimental results of hot test show that the outlet temperature of particle flow ranges from ∼709 K to ∼938 K and the average outlet temperature of particle flow is ∼807 K under the incident radiation power of ∼8 kw and the particle flow rat...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"45 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72582482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Sengupta, A. Habte, Yu Xie, A. Lopez, C. Gueymard
This study examines the differences in direct normal irradiance (DNI) in two versions of the National Solar Radiation Database (NSRDB) produced by the National Renewable Energy Laboratory (NREL). NSRDB V3 of the NSRDB includes significant changes to various parts of the radiative transfer model and inputs to the model compared to NSRDB V2. The changes in NSRDB V3 resulted in lower uncertainty than NSRDB V2. The study quantified the uncertainty and the spatial and temporal variability under clear-sky conditions. The uncertainty estimation was performed using a standardized method, The Guide to the Expression of Uncertainty in Measurement (GUM). The evaluation of the accuracy of the NSRDB was conducted using high-quality ground-measurements for seven National Oceanic and Atmospheric Administration Surface Radiation Budget Network (SURFRAD) stations for 1998–2015.
{"title":"The national solar radiation data base (NSRDB) for CSP applications","authors":"M. Sengupta, A. Habte, Yu Xie, A. Lopez, C. Gueymard","doi":"10.1063/1.5117712","DOIUrl":"https://doi.org/10.1063/1.5117712","url":null,"abstract":"This study examines the differences in direct normal irradiance (DNI) in two versions of the National Solar Radiation Database (NSRDB) produced by the National Renewable Energy Laboratory (NREL). NSRDB V3 of the NSRDB includes significant changes to various parts of the radiative transfer model and inputs to the model compared to NSRDB V2. The changes in NSRDB V3 resulted in lower uncertainty than NSRDB V2. The study quantified the uncertainty and the spatial and temporal variability under clear-sky conditions. The uncertainty estimation was performed using a standardized method, The Guide to the Expression of Uncertainty in Measurement (GUM). The evaluation of the accuracy of the NSRDB was conducted using high-quality ground-measurements for seven National Oceanic and Atmospheric Administration Surface Radiation Budget Network (SURFRAD) stations for 1998–2015.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75519176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Omaima El Alani, A. Ghennioui, A. A. Merrouni, H. Ghennioui, Y. Saint-Drenan, P. Blanc
McClear is a fast model of surface solar irradiance under cloudless condition (clear-sky), based on the radiative transfer model libRadtran that exploits the clear sky atmospheric optical properties (notably partial and total aerosol optical depths —AOD— at different wavelengths, total contents of water vapor and ozone) provided by the EU-funded Copernicus Atmospheric Monitoring Service (CAMS). This model provides global, diffuse horizontal irradiances and direct normal irradiance at any place and any time since 2004 onwards, with 2 days of delay, with temporal resolution up to 1 min (interpolation). In this paper, we present a first validation of the McClear clear sky irradiance model for the specific climate of Benguerir, Morocco. McClear’s validation was performed by comparing the 1 min average clear sky irradiance data (GHI: Global Horizontal Irradiance and DNI: Direct Normal Irradiance) from a high precision thermopile-based pyranometric station installed in Benguerir at Green Energy Park, and the values estimated by McClear for the same instants. The bias for global horizontal irradiance is 5 W m-2 (0.6 % of the mean observed irradiance). The root means square error (RMSE) is 17 W m-2 (2.2 %) and the correlation coefficient (CC) is 0.996. The bias for the direct normal irradiance is -17 W m-2 (-1.9 %). The RMSE is 58 W m-2 (6.7 %) and the correlation coefficient (CC) is 0.845. The same types of comparison have been done to assess the ability of McClear to forecast clear-sky GHI and DNI one day-ahead, using the provided forecasts of the state of the clear atmosphere by CAMS. The Bias, RMSE, STDE and correlation coefficient of such comparisons on the average 1-min profile of GHI and DNI from McClear are respectively for GHI - 0.8%, 3.3%, 3.3% and 0.991. For DNI -2.8%, 9.9%, 9.5% and 0.779.McClear is a fast model of surface solar irradiance under cloudless condition (clear-sky), based on the radiative transfer model libRadtran that exploits the clear sky atmospheric optical properties (notably partial and total aerosol optical depths —AOD— at different wavelengths, total contents of water vapor and ozone) provided by the EU-funded Copernicus Atmospheric Monitoring Service (CAMS). This model provides global, diffuse horizontal irradiances and direct normal irradiance at any place and any time since 2004 onwards, with 2 days of delay, with temporal resolution up to 1 min (interpolation). In this paper, we present a first validation of the McClear clear sky irradiance model for the specific climate of Benguerir, Morocco. McClear’s validation was performed by comparing the 1 min average clear sky irradiance data (GHI: Global Horizontal Irradiance and DNI: Direct Normal Irradiance) from a high precision thermopile-based pyranometric station installed in Benguerir at Green Energy Park, and the va...
McClear是一个无云(晴空)条件下地表太阳辐照度的快速模型，基于辐射传输模型libRadtran，该模型利用晴空大气光学特性(特别是不同波长下的部分和总气溶胶光学深度- aod，水蒸气和臭氧的总含量)，由欧盟资助的哥白尼大气监测服务(CAMS)提供。该模型提供自2004年以来任何地点和任何时间的全球漫射水平辐照度和直接正常辐照度，延迟2天，时间分辨率可达1分钟(插值)。在本文中，我们首次验证了McClear晴空辐照度模型对摩洛哥Benguerir特定气候的影响。McClear的验证是通过比较安装在绿色能源公园Benguerir的高精度热电堆辐射计站的1分钟平均晴空辐照度数据(GHI:全球水平辐照度和DNI:直接正常辐照度)和McClear在同一时刻的估定值来完成的。全球水平辐照度的偏差为5w - m-2(平均观测辐照度的0.6%)。均方根误差(RMSE)为17 W m-2(2.2%)，相关系数(CC)为0.996。直接正常辐照度的偏差为-17 W - m-2(- 1.9%)。RMSE为58 W m-2(6.7%)，相关系数(CC)为0.845。利用CAMS提供的晴空状态预报，对McClear提前一天预报晴空GHI和DNI的能力进行了相同类型的比较。这些比较在GHI和DNI平均1分钟剖面上的偏差、RMSE、STDE和相关系数分别为- 0.8%、3.3%、3.3%和0.991。对于DNI -2.8%， 9.9%， 9.5%和0.779。McClear是一个无云(晴空)条件下地表太阳辐照度的快速模型，基于辐射传输模型libRadtran，该模型利用晴空大气光学特性(特别是不同波长下的部分和总气溶胶光学深度- aod，水蒸气和臭氧的总含量)，由欧盟资助的哥白尼大气监测服务(CAMS)提供。该模型提供自2004年以来任何地点和任何时间的全球漫射水平辐照度和直接正常辐照度，延迟2天，时间分辨率可达1分钟(插值)。在本文中，我们首次验证了McClear晴空辐照度模型对摩洛哥Benguerir特定气候的影响。McClear的验证是通过比较安装在绿色能源公园Benguerir的高精度热电堆辐射计站的1分钟平均晴空辐照度数据(GHI:全球水平辐照度和DNI:直接正常辐照度)和va…
{"title":"Validation of surface solar irradiances estimates and forecast under clear-sky conditions from the CAMS McClear model in Benguerir, Morocco","authors":"Omaima El Alani, A. Ghennioui, A. A. Merrouni, H. Ghennioui, Y. Saint-Drenan, P. Blanc","doi":"10.1063/1.5117702","DOIUrl":"https://doi.org/10.1063/1.5117702","url":null,"abstract":"McClear is a fast model of surface solar irradiance under cloudless condition (clear-sky), based on the radiative transfer model libRadtran that exploits the clear sky atmospheric optical properties (notably partial and total aerosol optical depths —AOD— at different wavelengths, total contents of water vapor and ozone) provided by the EU-funded Copernicus Atmospheric Monitoring Service (CAMS). This model provides global, diffuse horizontal irradiances and direct normal irradiance at any place and any time since 2004 onwards, with 2 days of delay, with temporal resolution up to 1 min (interpolation). In this paper, we present a first validation of the McClear clear sky irradiance model for the specific climate of Benguerir, Morocco. McClear’s validation was performed by comparing the 1 min average clear sky irradiance data (GHI: Global Horizontal Irradiance and DNI: Direct Normal Irradiance) from a high precision thermopile-based pyranometric station installed in Benguerir at Green Energy Park, and the values estimated by McClear for the same instants. The bias for global horizontal irradiance is 5 W m-2 (0.6 % of the mean observed irradiance). The root means square error (RMSE) is 17 W m-2 (2.2 %) and the correlation coefficient (CC) is 0.996. The bias for the direct normal irradiance is -17 W m-2 (-1.9 %). The RMSE is 58 W m-2 (6.7 %) and the correlation coefficient (CC) is 0.845. The same types of comparison have been done to assess the ability of McClear to forecast clear-sky GHI and DNI one day-ahead, using the provided forecasts of the state of the clear atmosphere by CAMS. The Bias, RMSE, STDE and correlation coefficient of such comparisons on the average 1-min profile of GHI and DNI from McClear are respectively for GHI - 0.8%, 3.3%, 3.3% and 0.991. For DNI -2.8%, 9.9%, 9.5% and 0.779.McClear is a fast model of surface solar irradiance under cloudless condition (clear-sky), based on the radiative transfer model libRadtran that exploits the clear sky atmospheric optical properties (notably partial and total aerosol optical depths —AOD— at different wavelengths, total contents of water vapor and ozone) provided by the EU-funded Copernicus Atmospheric Monitoring Service (CAMS). This model provides global, diffuse horizontal irradiances and direct normal irradiance at any place and any time since 2004 onwards, with 2 days of delay, with temporal resolution up to 1 min (interpolation). In this paper, we present a first validation of the McClear clear sky irradiance model for the specific climate of Benguerir, Morocco. McClear’s validation was performed by comparing the 1 min average clear sky irradiance data (GHI: Global Horizontal Irradiance and DNI: Direct Normal Irradiance) from a high precision thermopile-based pyranometric station installed in Benguerir at Green Energy Park, and the va...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78960923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Steensma, Rubén Román, C. Marshall, J. Bermejo, K. Iyer, S. Al-Hajraf, A. Al-Qattan
The Kuwait Institute for Scientific Research (KISR) has developed Phase I of the innovative Shagaya Renewable Energy Park, which has an ambitious Master Plan to install approximately 3.2 GWe of renewable power as part of Kuwait’s commitment to generate 15% renewable energy by 2030. This project, built on 84 km2 in the desert location of Al-Shagaya, is approximately 100 km west of Kuwait City and comprises multiple renewable technologies as well as interconnection and site infrastructure. The Project objective is to enable the implementation of renewable alternatives to the use of fossil fuel resources to generate electricity in an effort to reduce emissions. The project evaluates the requirements of concentrated solar power (CSP), photovoltaic (PV) and wind energy technologies by testing how to address the challenges posed by the harsh Kuwaiti desert environment to these different technologies. WorleyParsons was appointed in 2014 as the Owner’s Engineer and Project Management Consultant to support KISR with project implementation and contracting and oversight of the Design Build Operate (DBO) contractors through commissioning and the first 2 years of operation. The project has demonstrated that two of the technologies, PV and Wind, which have now been in operation over a year, have exceeded the generation predictions. The CSP plant is currently in the final stages of commissioning. This paper presents an overview of the project with a primary focus on the CSP plant, key Lessons Learned, and the concerted efforts required to meet clear HSE requirements. Also discussed more briefly are the wind farm and the PV plant given the increased trend to integrate CSP and PV technologies as synergistic generators or to offset auxiliary loads of the CSP plant.The Kuwait Institute for Scientific Research (KISR) has developed Phase I of the innovative Shagaya Renewable Energy Park, which has an ambitious Master Plan to install approximately 3.2 GWe of renewable power as part of Kuwait’s commitment to generate 15% renewable energy by 2030. This project, built on 84 km2 in the desert location of Al-Shagaya, is approximately 100 km west of Kuwait City and comprises multiple renewable technologies as well as interconnection and site infrastructure. The Project objective is to enable the implementation of renewable alternatives to the use of fossil fuel resources to generate electricity in an effort to reduce emissions. The project evaluates the requirements of concentrated solar power (CSP), photovoltaic (PV) and wind energy technologies by testing how to address the challenges posed by the harsh Kuwaiti desert environment to these different technologies. WorleyParsons was appointed in 2014 as the Owner’s Engineer and Project Management Consultant to support KISR wi...
{"title":"Shagaya renewable energy park project","authors":"G. Steensma, Rubén Román, C. Marshall, J. Bermejo, K. Iyer, S. Al-Hajraf, A. Al-Qattan","doi":"10.1063/1.5117583","DOIUrl":"https://doi.org/10.1063/1.5117583","url":null,"abstract":"The Kuwait Institute for Scientific Research (KISR) has developed Phase I of the innovative Shagaya Renewable Energy Park, which has an ambitious Master Plan to install approximately 3.2 GWe of renewable power as part of Kuwait’s commitment to generate 15% renewable energy by 2030. This project, built on 84 km2 in the desert location of Al-Shagaya, is approximately 100 km west of Kuwait City and comprises multiple renewable technologies as well as interconnection and site infrastructure. The Project objective is to enable the implementation of renewable alternatives to the use of fossil fuel resources to generate electricity in an effort to reduce emissions. The project evaluates the requirements of concentrated solar power (CSP), photovoltaic (PV) and wind energy technologies by testing how to address the challenges posed by the harsh Kuwaiti desert environment to these different technologies. WorleyParsons was appointed in 2014 as the Owner’s Engineer and Project Management Consultant to support KISR with project implementation and contracting and oversight of the Design Build Operate (DBO) contractors through commissioning and the first 2 years of operation. The project has demonstrated that two of the technologies, PV and Wind, which have now been in operation over a year, have exceeded the generation predictions. The CSP plant is currently in the final stages of commissioning. This paper presents an overview of the project with a primary focus on the CSP plant, key Lessons Learned, and the concerted efforts required to meet clear HSE requirements. Also discussed more briefly are the wind farm and the PV plant given the increased trend to integrate CSP and PV technologies as synergistic generators or to offset auxiliary loads of the CSP plant.The Kuwait Institute for Scientific Research (KISR) has developed Phase I of the innovative Shagaya Renewable Energy Park, which has an ambitious Master Plan to install approximately 3.2 GWe of renewable power as part of Kuwait’s commitment to generate 15% renewable energy by 2030. This project, built on 84 km2 in the desert location of Al-Shagaya, is approximately 100 km west of Kuwait City and comprises multiple renewable technologies as well as interconnection and site infrastructure. The Project objective is to enable the implementation of renewable alternatives to the use of fossil fuel resources to generate electricity in an effort to reduce emissions. The project evaluates the requirements of concentrated solar power (CSP), photovoltaic (PV) and wind energy technologies by testing how to address the challenges posed by the harsh Kuwaiti desert environment to these different technologies. WorleyParsons was appointed in 2014 as the Owner’s Engineer and Project Management Consultant to support KISR wi...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79389329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clément Beust, E. Franquet, J. Bédécarrats, P. García, J. Pouvreau
Thermal energy storage systems using Phase-Change Materials (PCM) are appropriate for the storage of steam; these systems are interesting thermal storage candidates for the Direct Steam Generation (DSG) solar power plants. This paper presents a 2D axisymmetric numerical study of the melting and solidification of a PCM in a laboratory scale shell- and-tube latent heat storage system with external circular fins. The simulation results are compared with experimental measurements, for the heat charging and discharging processes. The influence of two parameters, the mushy zone constant and the temperature range where phase change takes place, is observed on the PCM temperature and the melting time; they affect the local phenomenology, but they do not have much influence on the global performances of the studied storage module.Thermal energy storage systems using Phase-Change Materials (PCM) are appropriate for the storage of steam; these systems are interesting thermal storage candidates for the Direct Steam Generation (DSG) solar power plants. This paper presents a 2D axisymmetric numerical study of the melting and solidification of a PCM in a laboratory scale shell- and-tube latent heat storage system with external circular fins. The simulation results are compared with experimental measurements, for the heat charging and discharging processes. The influence of two parameters, the mushy zone constant and the temperature range where phase change takes place, is observed on the PCM temperature and the melting time; they affect the local phenomenology, but they do not have much influence on the global performances of the studied storage module.
{"title":"Influence of the modeling parameters on the numerical CFD simulation of a shell-and-tube latent heat storage system with circular fins","authors":"Clément Beust, E. Franquet, J. Bédécarrats, P. García, J. Pouvreau","doi":"10.1063/1.5117722","DOIUrl":"https://doi.org/10.1063/1.5117722","url":null,"abstract":"Thermal energy storage systems using Phase-Change Materials (PCM) are appropriate for the storage of steam; these systems are interesting thermal storage candidates for the Direct Steam Generation (DSG) solar power plants. This paper presents a 2D axisymmetric numerical study of the melting and solidification of a PCM in a laboratory scale shell- and-tube latent heat storage system with external circular fins. The simulation results are compared with experimental measurements, for the heat charging and discharging processes. The influence of two parameters, the mushy zone constant and the temperature range where phase change takes place, is observed on the PCM temperature and the melting time; they affect the local phenomenology, but they do not have much influence on the global performances of the studied storage module.Thermal energy storage systems using Phase-Change Materials (PCM) are appropriate for the storage of steam; these systems are interesting thermal storage candidates for the Direct Steam Generation (DSG) solar power plants. This paper presents a 2D axisymmetric numerical study of the melting and solidification of a PCM in a laboratory scale shell- and-tube latent heat storage system with external circular fins. The simulation results are compared with experimental measurements, for the heat charging and discharging processes. The influence of two parameters, the mushy zone constant and the temperature range where phase change takes place, is observed on the PCM temperature and the melting time; they affect the local phenomenology, but they do not have much influence on the global performances of the studied storage module.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75492137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Stokos, Marios C. Georgiou, C. Roussos, E. Stiliaris, C. Papanicolas
The present work introduces an indirect approach for the estimation of the heat losses in TES (Thermal Energy Storage) tanks. Heat losses are calculated taking into account the fact that in steady state condition they are equal to the heat input provided by electric heaters. The proposed methodology has been tested in the TESLAB (Thermal Energy Storage LABoratory) tank which is equipped with two electric heaters simulating the heat input from solar irradiation. Heaters’ operation is controlled by an industrial PID (Proportional Integral Derivative) controller regulating their duty factor to achieve the desired set temperature. Total electric power is calculated as the summation of the contribution of each heater, which is equal to the product of the duty factor and the measured electric power. Heat losses for the TESLAB tank are compared with the measured losses during the cooling process satisfactorily. The proposed methodology could be also applied for the measurement of the heat losses of larger tanks, receivers and even CSP (Concentrated Solar Power) plants under operation without solar irradiation. Preliminary testing at the CSP-DSW (Concentrated Solar Power-Desalinated Sea Water) plant of The Cyprus Institute at PROTEAS (Platform for Research, Observation and TEchnological Applications in Solar energy) is quite promising.The present work introduces an indirect approach for the estimation of the heat losses in TES (Thermal Energy Storage) tanks. Heat losses are calculated taking into account the fact that in steady state condition they are equal to the heat input provided by electric heaters. The proposed methodology has been tested in the TESLAB (Thermal Energy Storage LABoratory) tank which is equipped with two electric heaters simulating the heat input from solar irradiation. Heaters’ operation is controlled by an industrial PID (Proportional Integral Derivative) controller regulating their duty factor to achieve the desired set temperature. Total electric power is calculated as the summation of the contribution of each heater, which is equal to the product of the duty factor and the measured electric power. Heat losses for the TESLAB tank are compared with the measured losses during the cooling process satisfactorily. The proposed methodology could be also applied for the measurement of the heat losses of larger tanks,...
{"title":"Experimental methodology for the heat losses estimation in TES tanks","authors":"K. Stokos, Marios C. Georgiou, C. Roussos, E. Stiliaris, C. Papanicolas","doi":"10.1063/1.5117745","DOIUrl":"https://doi.org/10.1063/1.5117745","url":null,"abstract":"The present work introduces an indirect approach for the estimation of the heat losses in TES (Thermal Energy Storage) tanks. Heat losses are calculated taking into account the fact that in steady state condition they are equal to the heat input provided by electric heaters. The proposed methodology has been tested in the TESLAB (Thermal Energy Storage LABoratory) tank which is equipped with two electric heaters simulating the heat input from solar irradiation. Heaters’ operation is controlled by an industrial PID (Proportional Integral Derivative) controller regulating their duty factor to achieve the desired set temperature. Total electric power is calculated as the summation of the contribution of each heater, which is equal to the product of the duty factor and the measured electric power. Heat losses for the TESLAB tank are compared with the measured losses during the cooling process satisfactorily. The proposed methodology could be also applied for the measurement of the heat losses of larger tanks, receivers and even CSP (Concentrated Solar Power) plants under operation without solar irradiation. Preliminary testing at the CSP-DSW (Concentrated Solar Power-Desalinated Sea Water) plant of The Cyprus Institute at PROTEAS (Platform for Research, Observation and TEchnological Applications in Solar energy) is quite promising.The present work introduces an indirect approach for the estimation of the heat losses in TES (Thermal Energy Storage) tanks. Heat losses are calculated taking into account the fact that in steady state condition they are equal to the heat input provided by electric heaters. The proposed methodology has been tested in the TESLAB (Thermal Energy Storage LABoratory) tank which is equipped with two electric heaters simulating the heat input from solar irradiation. Heaters’ operation is controlled by an industrial PID (Proportional Integral Derivative) controller regulating their duty factor to achieve the desired set temperature. Total electric power is calculated as the summation of the contribution of each heater, which is equal to the product of the duty factor and the measured electric power. Heat losses for the TESLAB tank are compared with the measured losses during the cooling process satisfactorily. The proposed methodology could be also applied for the measurement of the heat losses of larger tanks,...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"135 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78548077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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