Parabolic Dish concentrators are a well-known solution for many applications such as Concentrated Solar Power (CSP), solar metallurgical processes, solar reactors for fuel production, etc. Nevertheless, this technology is facing a tremendous challenge to become more efficient and competitive (especially within CSP field) in comparison with other technologies, namely Central Tower Receivers. A possible path to achieve this goal is to use a Cassegranian approach which enables a top-down design, placing the receiver closer to the ground and with potential higher concentration. In this paper, the theoretical limit of such configurations and a practical solution is presented with a discussion of its advantages and possible drawbacks.Parabolic Dish concentrators are a well-known solution for many applications such as Concentrated Solar Power (CSP), solar metallurgical processes, solar reactors for fuel production, etc. Nevertheless, this technology is facing a tremendous challenge to become more efficient and competitive (especially within CSP field) in comparison with other technologies, namely Central Tower Receivers. A possible path to achieve this goal is to use a Cassegranian approach which enables a top-down design, placing the receiver closer to the ground and with potential higher concentration. In this paper, the theoretical limit of such configurations and a practical solution is presented with a discussion of its advantages and possible drawbacks.
{"title":"Simultaneous multiple surface method for the design of new parabolic dish-type concentrator using a Cassegranian approach","authors":"Diogo Canavarro, J. Chaves, M. Collares-Pereira","doi":"10.1063/1.5117584","DOIUrl":"https://doi.org/10.1063/1.5117584","url":null,"abstract":"Parabolic Dish concentrators are a well-known solution for many applications such as Concentrated Solar Power (CSP), solar metallurgical processes, solar reactors for fuel production, etc. Nevertheless, this technology is facing a tremendous challenge to become more efficient and competitive (especially within CSP field) in comparison with other technologies, namely Central Tower Receivers. A possible path to achieve this goal is to use a Cassegranian approach which enables a top-down design, placing the receiver closer to the ground and with potential higher concentration. In this paper, the theoretical limit of such configurations and a practical solution is presented with a discussion of its advantages and possible drawbacks.Parabolic Dish concentrators are a well-known solution for many applications such as Concentrated Solar Power (CSP), solar metallurgical processes, solar reactors for fuel production, etc. Nevertheless, this technology is facing a tremendous challenge to become more efficient and competitive (especially within CSP field) in comparison with other technologies, namely Central Tower Receivers. A possible path to achieve this goal is to use a Cassegranian approach which enables a top-down design, placing the receiver closer to the ground and with potential higher concentration. In this paper, the theoretical limit of such configurations and a practical solution is presented with a discussion of its advantages and possible drawbacks.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91299455","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}
C. Villasante, Í. Pagola, A. Peña, Marcelino Sánchez, A. Olarra, E. Gomez-Acedo, S. Herrero
The MOSAIC project aims to develop a commercial CSP plant concept over 1GW nominal capacity. High nominal capacity is reached in a modular way, where each MOSAIC module delivers thermal energy to connected thermal energy storage systems that supply their energy to a high capacity power block (>1GW). This modular configuration significantly reduces the specific cost of the power block (€/MW installed). Each MOSAIC module consists of an innovative fixed spherical mirror concentrator arranged in the form of a semi-Fresnel and a moving receiver driven by a low-cost cable tracking system. This configuration reduces the amount of moving parts of the entire system, lowering the cost of the solar field and keeping high concentration ratios. This will ensure high working temperatures and therefore high cycle efficiencies and cost-effective use of thermal storage systems. Energy from the sun is collected, concentrated and transferred to the heat transfer fluid at module level, where, due to the modular concept, the distances from the solar concentrator to the receiver are much shorter than in typical solar tower technologies. As a result, energy collection efficiency is maximized, atmospheric attenuation is minimized, and precision requirements can be lowered. All these technical benefits can contribute to a lower capital cost of the whole system, while ensuring efficiency and reliability. This therefore has a strong impact on the final cost of electricity production.The MOSAIC project aims to develop a commercial CSP plant concept over 1GW nominal capacity. High nominal capacity is reached in a modular way, where each MOSAIC module delivers thermal energy to connected thermal energy storage systems that supply their energy to a high capacity power block (>1GW). This modular configuration significantly reduces the specific cost of the power block (€/MW installed). Each MOSAIC module consists of an innovative fixed spherical mirror concentrator arranged in the form of a semi-Fresnel and a moving receiver driven by a low-cost cable tracking system. This configuration reduces the amount of moving parts of the entire system, lowering the cost of the solar field and keeping high concentration ratios. This will ensure high working temperatures and therefore high cycle efficiencies and cost-effective use of thermal storage systems. Energy from the sun is collected, concentrated and transferred to the heat transfer fluid at module level, where, due to the modular concept, the...
{"title":"“MOSAIC”, A new CSP plant concept for the highest concentration ratios at the lowest cost","authors":"C. Villasante, Í. Pagola, A. Peña, Marcelino Sánchez, A. Olarra, E. Gomez-Acedo, S. Herrero","doi":"10.1063/1.5117594","DOIUrl":"https://doi.org/10.1063/1.5117594","url":null,"abstract":"The MOSAIC project aims to develop a commercial CSP plant concept over 1GW nominal capacity. High nominal capacity is reached in a modular way, where each MOSAIC module delivers thermal energy to connected thermal energy storage systems that supply their energy to a high capacity power block (>1GW). This modular configuration significantly reduces the specific cost of the power block (€/MW installed). Each MOSAIC module consists of an innovative fixed spherical mirror concentrator arranged in the form of a semi-Fresnel and a moving receiver driven by a low-cost cable tracking system. This configuration reduces the amount of moving parts of the entire system, lowering the cost of the solar field and keeping high concentration ratios. This will ensure high working temperatures and therefore high cycle efficiencies and cost-effective use of thermal storage systems. Energy from the sun is collected, concentrated and transferred to the heat transfer fluid at module level, where, due to the modular concept, the distances from the solar concentrator to the receiver are much shorter than in typical solar tower technologies. As a result, energy collection efficiency is maximized, atmospheric attenuation is minimized, and precision requirements can be lowered. All these technical benefits can contribute to a lower capital cost of the whole system, while ensuring efficiency and reliability. This therefore has a strong impact on the final cost of electricity production.The MOSAIC project aims to develop a commercial CSP plant concept over 1GW nominal capacity. High nominal capacity is reached in a modular way, where each MOSAIC module delivers thermal energy to connected thermal energy storage systems that supply their energy to a high capacity power block (>1GW). This modular configuration significantly reduces the specific cost of the power block (€/MW installed). Each MOSAIC module consists of an innovative fixed spherical mirror concentrator arranged in the form of a semi-Fresnel and a moving receiver driven by a low-cost cable tracking system. This configuration reduces the amount of moving parts of the entire system, lowering the cost of the solar field and keeping high concentration ratios. This will ensure high working temperatures and therefore high cycle efficiencies and cost-effective use of thermal storage systems. Energy from the sun is collected, concentrated and transferred to the heat transfer fluid at module level, where, due to the modular concept, the...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"221 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73268082","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}
Within the consideration of the potential benefits of a CSP-PV hybrid over a CSP stand-alone plant, the usage of water has been analyzed. Specifically at arid locations, which are typically preferred for CSP due to the high irradiance, water is a scarce resource, and options to save water are worth consideration. The conservation of water is an important factor in the further development of CSP sites in these areas. In an effort to identify water saving potential of CSP-PV hybrid plants compared with CSP plants, a case study has been performed on the basis of a fictive project in an arid region with an air-cooled condenser (ACC) cooling system. Besides the required make-up water for the CSP steam cycle, the water consumption for cleaning the solar field has been identified as one of the main driver for the total water consumption and has been analyzed in more detail. Provided that PV performance is less affected by soiling when compared to CSP, less cleaning cycles are required for PV modules. The results of this case study show that a CSP-PV hybrid has the potential to reduce the total water consumption of a plant by approximately 43% compared with a CSP only plant configuration. Moreover, the results indicate that the water consumption can further be reduced by almost 60% if dry cleaning is used for the PV modules.Within the consideration of the potential benefits of a CSP-PV hybrid over a CSP stand-alone plant, the usage of water has been analyzed. Specifically at arid locations, which are typically preferred for CSP due to the high irradiance, water is a scarce resource, and options to save water are worth consideration. The conservation of water is an important factor in the further development of CSP sites in these areas. In an effort to identify water saving potential of CSP-PV hybrid plants compared with CSP plants, a case study has been performed on the basis of a fictive project in an arid region with an air-cooled condenser (ACC) cooling system. Besides the required make-up water for the CSP steam cycle, the water consumption for cleaning the solar field has been identified as one of the main driver for the total water consumption and has been analyzed in more detail. Provided that PV performance is less affected by soiling when compared to CSP, less cleaning cycles are required for PV modules. The results...
{"title":"Water saving potential of CSP-PV hybrid plants","authors":"Lukas Haack, M. Schlecht","doi":"10.1063/1.5117762","DOIUrl":"https://doi.org/10.1063/1.5117762","url":null,"abstract":"Within the consideration of the potential benefits of a CSP-PV hybrid over a CSP stand-alone plant, the usage of water has been analyzed. Specifically at arid locations, which are typically preferred for CSP due to the high irradiance, water is a scarce resource, and options to save water are worth consideration. The conservation of water is an important factor in the further development of CSP sites in these areas. In an effort to identify water saving potential of CSP-PV hybrid plants compared with CSP plants, a case study has been performed on the basis of a fictive project in an arid region with an air-cooled condenser (ACC) cooling system. Besides the required make-up water for the CSP steam cycle, the water consumption for cleaning the solar field has been identified as one of the main driver for the total water consumption and has been analyzed in more detail. Provided that PV performance is less affected by soiling when compared to CSP, less cleaning cycles are required for PV modules. The results of this case study show that a CSP-PV hybrid has the potential to reduce the total water consumption of a plant by approximately 43% compared with a CSP only plant configuration. Moreover, the results indicate that the water consumption can further be reduced by almost 60% if dry cleaning is used for the PV modules.Within the consideration of the potential benefits of a CSP-PV hybrid over a CSP stand-alone plant, the usage of water has been analyzed. Specifically at arid locations, which are typically preferred for CSP due to the high irradiance, water is a scarce resource, and options to save water are worth consideration. The conservation of water is an important factor in the further development of CSP sites in these areas. In an effort to identify water saving potential of CSP-PV hybrid plants compared with CSP plants, a case study has been performed on the basis of a fictive project in an arid region with an air-cooled condenser (ACC) cooling system. Besides the required make-up water for the CSP steam cycle, the water consumption for cleaning the solar field has been identified as one of the main driver for the total water consumption and has been analyzed in more detail. Provided that PV performance is less affected by soiling when compared to CSP, less cleaning cycles are required for PV modules. The results...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75836761","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}
The Fraunhofer ISE single-tank simulation model was parameterized and inputs were set according to the Fraunhofer ISE lab-scale storage tank in order to validate the model. The measured stratification during the charging cycle was compared to the temperature distribution of the simulated storage tank. If the effective diffusivity factor was calculated according to literature correlations, it corresponded very well with the measurement data with a mean standard deviation of 1.21%. A parameter identification for the effective diffusivity factor of the storage was performed to reduce these deviations even further. It showed that the ideal effective diffusivity factor is 150. The mean standard deviation was further reduced to 1.14 %.
{"title":"Validation of thermocline storage model with experimental data of a laboratory-scale molten salt test facility","authors":"Theda Zoschke, Martin Karl, T. Fluri, Ralf Müller","doi":"10.1063/1.5117749","DOIUrl":"https://doi.org/10.1063/1.5117749","url":null,"abstract":"The Fraunhofer ISE single-tank simulation model was parameterized and inputs were set according to the Fraunhofer ISE lab-scale storage tank in order to validate the model. The measured stratification during the charging cycle was compared to the temperature distribution of the simulated storage tank. If the effective diffusivity factor was calculated according to literature correlations, it corresponded very well with the measurement data with a mean standard deviation of 1.21%. A parameter identification for the effective diffusivity factor of the storage was performed to reduce these deviations even further. It showed that the ideal effective diffusivity factor is 150. The mean standard deviation was further reduced to 1.14 %.","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":"74353043","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}
Reducing production costs of thermo-conversion of waste to fuel technologies depends upon an integrated approach to heat utilisation, nutrient recycling and complete by-product valorisation. Hydrothermal liquefaction is a proven laboratory technology with much recent research interest, though yet to be widely deployed as a commercial technology for third generation biofuels. Notwithstanding increased applied research efforts into hydrothermal liquefaction, energy inputs into waste to fuel formulation remain high, and originate from non-renewable heat sources. The technical approach presented is the field testing of an integrated set-up of concentrated solar power and hydrothermal liquefaction system and bio-crude output compositional analysis. Concentrated solar power is integrated with hydrothermal liquefaction technologies into the conversion process to improve the energy efficiency and the economic case for scaling waste to bio-crude production. This paper presents the hydrothermal liquefaction bio-oil formation and product analysis at a pre-pilot field scale. Waste valorisation and commercial strategy is discussed with reference to post-reactant hydrothermal liquefaction outputs on experimental work carried out in India.Reducing production costs of thermo-conversion of waste to fuel technologies depends upon an integrated approach to heat utilisation, nutrient recycling and complete by-product valorisation. Hydrothermal liquefaction is a proven laboratory technology with much recent research interest, though yet to be widely deployed as a commercial technology for third generation biofuels. Notwithstanding increased applied research efforts into hydrothermal liquefaction, energy inputs into waste to fuel formulation remain high, and originate from non-renewable heat sources. The technical approach presented is the field testing of an integrated set-up of concentrated solar power and hydrothermal liquefaction system and bio-crude output compositional analysis. Concentrated solar power is integrated with hydrothermal liquefaction technologies into the conversion process to improve the energy efficiency and the economic case for scaling waste to bio-crude production. This paper presents the hydrothermal liquefaction bio-oil...
{"title":"Fuel from hydrothermal liquefaction of waste in solar parabolic troughs","authors":"M. Pearce, X. Tonnellier, N. Sengar, C. Sansom","doi":"10.1063/1.5117695","DOIUrl":"https://doi.org/10.1063/1.5117695","url":null,"abstract":"Reducing production costs of thermo-conversion of waste to fuel technologies depends upon an integrated approach to heat utilisation, nutrient recycling and complete by-product valorisation. Hydrothermal liquefaction is a proven laboratory technology with much recent research interest, though yet to be widely deployed as a commercial technology for third generation biofuels. Notwithstanding increased applied research efforts into hydrothermal liquefaction, energy inputs into waste to fuel formulation remain high, and originate from non-renewable heat sources. The technical approach presented is the field testing of an integrated set-up of concentrated solar power and hydrothermal liquefaction system and bio-crude output compositional analysis. Concentrated solar power is integrated with hydrothermal liquefaction technologies into the conversion process to improve the energy efficiency and the economic case for scaling waste to bio-crude production. This paper presents the hydrothermal liquefaction bio-oil formation and product analysis at a pre-pilot field scale. Waste valorisation and commercial strategy is discussed with reference to post-reactant hydrothermal liquefaction outputs on experimental work carried out in India.Reducing production costs of thermo-conversion of waste to fuel technologies depends upon an integrated approach to heat utilisation, nutrient recycling and complete by-product valorisation. Hydrothermal liquefaction is a proven laboratory technology with much recent research interest, though yet to be widely deployed as a commercial technology for third generation biofuels. Notwithstanding increased applied research efforts into hydrothermal liquefaction, energy inputs into waste to fuel formulation remain high, and originate from non-renewable heat sources. The technical approach presented is the field testing of an integrated set-up of concentrated solar power and hydrothermal liquefaction system and bio-crude output compositional analysis. Concentrated solar power is integrated with hydrothermal liquefaction technologies into the conversion process to improve the energy efficiency and the economic case for scaling waste to bio-crude production. This paper presents the hydrothermal liquefaction bio-oil...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"87 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77618721","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}
Conversion of algae into liquid fuels via solar-driven supercritical water gasification (SCWG) with steam methane reforming (SMR) and Fischer–Tropsch (FT) synthesis offers a promising approach for production of clean fuels. While much research has been dedicated to the analysis of biomass gasification, methane reforming and FT synthesis separately, little emphasis has been placed on a fully integrated system based on these components especially when a variable heat source – i.e. concentrating solar thermal (CST) – is involved. As such, this paper investigates the annual dynamic performance and techno-economic feasibility of this technology at a system level. A detailed steady-state model of the SCWG-SMR and FT plants is developed in ASPEN Plus software. Based on performance curves of key component quantities at design and off-design points, an energy-based, system-level model of the whole solar fuel plant is developed in OpenModelica. The solar field is sized such that it can deliver 50 MWth to the receiver at design. The results of the parametric study suggest that the optimal solar multiple and syngas storage size are 3.5 and 16 hours, respectively, leading to a levelised cost of fuel (LCOF) of 3.2 AUD/L (∼2.3 USD/L) and a capacity factor of ∼71%. The total capital and annual operational costs of the system are found to be ∼162 M-AUD and ∼24 M-AUD per year, respectively. Although the estimated LCOF in this study seems to be relatively high compared to fossil fuel-based petroleum products, this technology is expected to be economically competitive in the near future through e.g. upscaling the plant size and further reduction in the algae production cost.
{"title":"System-level simulation of a solar-driven liquid fuel production plant via gasification-Fischer-Tropsch route","authors":"Ali Shirazi, A. Rahbari, John Pye","doi":"10.1063/1.5117696","DOIUrl":"https://doi.org/10.1063/1.5117696","url":null,"abstract":"Conversion of algae into liquid fuels via solar-driven supercritical water gasification (SCWG) with steam methane reforming (SMR) and Fischer–Tropsch (FT) synthesis offers a promising approach for production of clean fuels. While much research has been dedicated to the analysis of biomass gasification, methane reforming and FT synthesis separately, little emphasis has been placed on a fully integrated system based on these components especially when a variable heat source – i.e. concentrating solar thermal (CST) – is involved. As such, this paper investigates the annual dynamic performance and techno-economic feasibility of this technology at a system level. A detailed steady-state model of the SCWG-SMR and FT plants is developed in ASPEN Plus software. Based on performance curves of key component quantities at design and off-design points, an energy-based, system-level model of the whole solar fuel plant is developed in OpenModelica. The solar field is sized such that it can deliver 50 MWth to the receiver at design. The results of the parametric study suggest that the optimal solar multiple and syngas storage size are 3.5 and 16 hours, respectively, leading to a levelised cost of fuel (LCOF) of 3.2 AUD/L (∼2.3 USD/L) and a capacity factor of ∼71%. The total capital and annual operational costs of the system are found to be ∼162 M-AUD and ∼24 M-AUD per year, respectively. Although the estimated LCOF in this study seems to be relatively high compared to fossil fuel-based petroleum products, this technology is expected to be economically competitive in the near future through e.g. upscaling the plant size and further reduction in the algae production cost.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87740348","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. Vignola, J. Peterson, F. Mavromatakis, S. Wilbert, Anne Forstinger, M. Dooraghi, M. Sengupta
Three types of biases are examined for a Rotating Shadowband Radiometer (RSR): temperature bias, spectral bias, and deviation from a Lambertian cosine response. A step by step method is presented to illustrate how to use this information to develop a model for adjustment algorithms for a RSR. Comparisons are made with a RSR adjusted using the model and measure direct normal, diffuse, and global irradiance.
{"title":"Removing biases from rotating shadowband radiometers","authors":"F. Vignola, J. Peterson, F. Mavromatakis, S. Wilbert, Anne Forstinger, M. Dooraghi, M. Sengupta","doi":"10.1063/1.5117714","DOIUrl":"https://doi.org/10.1063/1.5117714","url":null,"abstract":"Three types of biases are examined for a Rotating Shadowband Radiometer (RSR): temperature bias, spectral bias, and deviation from a Lambertian cosine response. A step by step method is presented to illustrate how to use this information to develop a model for adjustment algorithms for a RSR. Comparisons are made with a RSR adjusted using the model and measure direct normal, diffuse, and global irradiance.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77079601","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}
P. Guo, Quyen H. Ly, W. Saw, K. Lim, P. Ashman, G. Nathan
A technical assessment of pneumatic conveying of solids at various operating temperatures for a high temperature solar particle receiver is reported. The power consumption of the conveying system was determined from a calculation of the pressure drop in the conveying pipes. The enthalpy loss of the transported particles was estimated from an energy balance and the heat losses through the wall. The power consumption of the pneumatic conveying system was found to decrease significantly with an increase in conveying temperature and to be less for a dense phase conveying system that for a skip hoist conveyor, where the solid input temperature is higher than 150 °C. The equivalent threshold temperature is 400 °C for a dilute phase conveying system. Nevertheless, including the enthalpy loss of the particles caused by the increases in both mechanical energy and gas enthalpy, the dense phase conveying is more energy efficient than skip hoist if the solid input temperature is higher than 450 °C while the dilute phase conveying always consumes more energy than skip hoist, under the studied conditions.A technical assessment of pneumatic conveying of solids at various operating temperatures for a high temperature solar particle receiver is reported. The power consumption of the conveying system was determined from a calculation of the pressure drop in the conveying pipes. The enthalpy loss of the transported particles was estimated from an energy balance and the heat losses through the wall. The power consumption of the pneumatic conveying system was found to decrease significantly with an increase in conveying temperature and to be less for a dense phase conveying system that for a skip hoist conveyor, where the solid input temperature is higher than 150 °C. The equivalent threshold temperature is 400 °C for a dilute phase conveying system. Nevertheless, including the enthalpy loss of the particles caused by the increases in both mechanical energy and gas enthalpy, the dense phase conveying is more energy efficient than skip hoist if the solid input temperature is higher than 450 °C while the dilute ph...
{"title":"A technical assessment of pneumatic conveying of solids for a high temperature particle receiver","authors":"P. Guo, Quyen H. Ly, W. Saw, K. Lim, P. Ashman, G. Nathan","doi":"10.1063/1.5117537","DOIUrl":"https://doi.org/10.1063/1.5117537","url":null,"abstract":"A technical assessment of pneumatic conveying of solids at various operating temperatures for a high temperature solar particle receiver is reported. The power consumption of the conveying system was determined from a calculation of the pressure drop in the conveying pipes. The enthalpy loss of the transported particles was estimated from an energy balance and the heat losses through the wall. The power consumption of the pneumatic conveying system was found to decrease significantly with an increase in conveying temperature and to be less for a dense phase conveying system that for a skip hoist conveyor, where the solid input temperature is higher than 150 °C. The equivalent threshold temperature is 400 °C for a dilute phase conveying system. Nevertheless, including the enthalpy loss of the particles caused by the increases in both mechanical energy and gas enthalpy, the dense phase conveying is more energy efficient than skip hoist if the solid input temperature is higher than 450 °C while the dilute phase conveying always consumes more energy than skip hoist, under the studied conditions.A technical assessment of pneumatic conveying of solids at various operating temperatures for a high temperature solar particle receiver is reported. The power consumption of the conveying system was determined from a calculation of the pressure drop in the conveying pipes. The enthalpy loss of the transported particles was estimated from an energy balance and the heat losses through the wall. The power consumption of the pneumatic conveying system was found to decrease significantly with an increase in conveying temperature and to be less for a dense phase conveying system that for a skip hoist conveyor, where the solid input temperature is higher than 150 °C. The equivalent threshold temperature is 400 °C for a dilute phase conveying system. Nevertheless, including the enthalpy loss of the particles caused by the increases in both mechanical energy and gas enthalpy, the dense phase conveying is more energy efficient than skip hoist if the solid input temperature is higher than 450 °C while the dilute ph...","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74584240","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}
Seven Concentrating Solar Power (CSP) projects, collectively amounting to 600 MW of installed capacity, have been awarded for implementation in South Africa as part of the Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) [1]. Four of these projects (300 MW) are currently operational, two more (200 MW) are currently under construction and one (100 MW) is in the pre-financial close phase [1]. Mott MacDonald has a Technical Advisory role on all seven South African CSP projects supporting the Lenders or the Owners and has been closely involved in the development, construction, and operation phases of each of these projects. Previous work completed in 2015 [2], focused on the requirements within the REIPPPP and how these affected project design and implementation. This paper builds on this work and focusses on providing an updated view of the program and highlights several challenges and learnings experienced to date.Seven Concentrating Solar Power (CSP) projects, collectively amounting to 600 MW of installed capacity, have been awarded for implementation in South Africa as part of the Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) [1]. Four of these projects (300 MW) are currently operational, two more (200 MW) are currently under construction and one (100 MW) is in the pre-financial close phase [1]. Mott MacDonald has a Technical Advisory role on all seven South African CSP projects supporting the Lenders or the Owners and has been closely involved in the development, construction, and operation phases of each of these projects. Previous work completed in 2015 [2], focused on the requirements within the REIPPPP and how these affected project design and implementation. This paper builds on this work and focusses on providing an updated view of the program and highlights several challenges and learnings experienced to date.
{"title":"An updated review of South African CSP projects under the renewable energy independent power producer procurement programme (REIPPPP)","authors":"J. Larmuth, A. Cuéllar","doi":"10.1063/1.5117581","DOIUrl":"https://doi.org/10.1063/1.5117581","url":null,"abstract":"Seven Concentrating Solar Power (CSP) projects, collectively amounting to 600 MW of installed capacity, have been awarded for implementation in South Africa as part of the Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) [1]. Four of these projects (300 MW) are currently operational, two more (200 MW) are currently under construction and one (100 MW) is in the pre-financial close phase [1]. Mott MacDonald has a Technical Advisory role on all seven South African CSP projects supporting the Lenders or the Owners and has been closely involved in the development, construction, and operation phases of each of these projects. Previous work completed in 2015 [2], focused on the requirements within the REIPPPP and how these affected project design and implementation. This paper builds on this work and focusses on providing an updated view of the program and highlights several challenges and learnings experienced to date.Seven Concentrating Solar Power (CSP) projects, collectively amounting to 600 MW of installed capacity, have been awarded for implementation in South Africa as part of the Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) [1]. Four of these projects (300 MW) are currently operational, two more (200 MW) are currently under construction and one (100 MW) is in the pre-financial close phase [1]. Mott MacDonald has a Technical Advisory role on all seven South African CSP projects supporting the Lenders or the Owners and has been closely involved in the development, construction, and operation phases of each of these projects. Previous work completed in 2015 [2], focused on the requirements within the REIPPPP and how these affected project design and implementation. This paper builds on this work and focusses on providing an updated view of the program and highlights several challenges and learnings experienced to date.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74945667","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}
Accurately modeling risks, costs, and electricity output is essential to the financing and advancement of concentrating solar power projects. To address this need, a group of CSP experts created a guideline document, titled SolarPACES Guideline for Bankable STE Yield Assessment [1]. To make this information more accessible and allow stakeholders to test specific models against the recommendations, the guidelines have been condensed into a spreadsheet-based checklist. The checklist was applied to NREL’s System Advisor Model (SAM) software, providing useful feedback to both the checklist group and the SAM development team. This study showed strong agreement between SAM and the guidelines, demonstrated the use of the guidelines in model validation, and resulted in several recommended improvements to SAM.Accurately modeling risks, costs, and electricity output is essential to the financing and advancement of concentrating solar power projects. To address this need, a group of CSP experts created a guideline document, titled SolarPACES Guideline for Bankable STE Yield Assessment [1]. To make this information more accessible and allow stakeholders to test specific models against the recommendations, the guidelines have been condensed into a spreadsheet-based checklist. The checklist was applied to NREL’s System Advisor Model (SAM) software, providing useful feedback to both the checklist group and the SAM development team. This study showed strong agreement between SAM and the guidelines, demonstrated the use of the guidelines in model validation, and resulted in several recommended improvements to SAM.
{"title":"CSP-plant modeling guidelines and compliance of the system advisor model (SAM)","authors":"Devon Kesseli, M. Wagner, R. Guédez, C. Turchi","doi":"10.1063/1.5117676","DOIUrl":"https://doi.org/10.1063/1.5117676","url":null,"abstract":"Accurately modeling risks, costs, and electricity output is essential to the financing and advancement of concentrating solar power projects. To address this need, a group of CSP experts created a guideline document, titled SolarPACES Guideline for Bankable STE Yield Assessment [1]. To make this information more accessible and allow stakeholders to test specific models against the recommendations, the guidelines have been condensed into a spreadsheet-based checklist. The checklist was applied to NREL’s System Advisor Model (SAM) software, providing useful feedback to both the checklist group and the SAM development team. This study showed strong agreement between SAM and the guidelines, demonstrated the use of the guidelines in model validation, and resulted in several recommended improvements to SAM.Accurately modeling risks, costs, and electricity output is essential to the financing and advancement of concentrating solar power projects. To address this need, a group of CSP experts created a guideline document, titled SolarPACES Guideline for Bankable STE Yield Assessment [1]. To make this information more accessible and allow stakeholders to test specific models against the recommendations, the guidelines have been condensed into a spreadsheet-based checklist. The checklist was applied to NREL’s System Advisor Model (SAM) software, providing useful feedback to both the checklist group and the SAM development team. This study showed strong agreement between SAM and the guidelines, demonstrated the use of the guidelines in model validation, and resulted in several recommended improvements to SAM.","PeriodicalId":21790,"journal":{"name":"SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75038960","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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