Pub Date : 2022-08-14DOI: 10.1080/17512549.2022.2109211
P. Sadeghian, Samira Rahnama, A. Afshari, S. Sadrizadeh
ABSTRACT Thermal comfort conditions profoundly affect the occupants’ health and productivity. A diffuse ceiling ventilation system is an air distribution system in which the air is supplied to the occupied zone with relatively a low velocity through the perforated panels installed in the ceiling. The current study evaluated the impact of diffuse ceiling design parameters, i.e. diffuse panel configurations and heat load distributions, on the thermal comfort condition of the occupants. In this regard, the computational fluid dynamics technique was used to evaluate thermal comfort conditions in a waiting room, meeting room and office. The central and dispersal configuration of active diffuse panels was considered. The PMV-PPD model was applied to evaluate the overall occupants’ comfort, while the draft rate was considered to assess local thermal comfort. The model validation was performed by comparing the collected laboratory measurement data. Overall, the results indicated that the central active diffuse panel configuration had a better thermal comfort than the dispersed one. The evaluation of dispersed configuration in realist scenarios, including office and waiting room, had the highest dissatisfaction, with a PPD value of 9%. Local thermal comfort assessment revealed that dispersed configuration had the highest draft rate of 14% in the office.
{"title":"The role of design parameters on the performance of diffuse ceiling ventilation systems – thermal comfort analyses for indoor environment","authors":"P. Sadeghian, Samira Rahnama, A. Afshari, S. Sadrizadeh","doi":"10.1080/17512549.2022.2109211","DOIUrl":"https://doi.org/10.1080/17512549.2022.2109211","url":null,"abstract":"ABSTRACT Thermal comfort conditions profoundly affect the occupants’ health and productivity. A diffuse ceiling ventilation system is an air distribution system in which the air is supplied to the occupied zone with relatively a low velocity through the perforated panels installed in the ceiling. The current study evaluated the impact of diffuse ceiling design parameters, i.e. diffuse panel configurations and heat load distributions, on the thermal comfort condition of the occupants. In this regard, the computational fluid dynamics technique was used to evaluate thermal comfort conditions in a waiting room, meeting room and office. The central and dispersal configuration of active diffuse panels was considered. The PMV-PPD model was applied to evaluate the overall occupants’ comfort, while the draft rate was considered to assess local thermal comfort. The model validation was performed by comparing the collected laboratory measurement data. Overall, the results indicated that the central active diffuse panel configuration had a better thermal comfort than the dispersed one. The evaluation of dispersed configuration in realist scenarios, including office and waiting room, had the highest dissatisfaction, with a PPD value of 9%. Local thermal comfort assessment revealed that dispersed configuration had the highest draft rate of 14% in the office.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"806 - 824"},"PeriodicalIF":2.0,"publicationDate":"2022-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42146521","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}
Pub Date : 2022-07-19DOI: 10.1080/17512549.2022.2101524
M. Nasrabadi, D. Finn
ABSTRACT Evaporative cooling, using cooling tower systems, has the potential to offer an alternative approach for producing high temperature chilled water, particularly for buildings located in temperate climates. The current paper examines the performance of an integrated cooling system, where an open forced draught counter flow cooling tower is used for the provision of chilled water for a radiant cooling and displacement ventilation system. For this purpose, a low temperature low approach direct evaporative cooling tower is used which can provide cooling water with low approach temperatures (1-3 K), which defines the temperature difference between the tower water outlet temperature and ambient wet bulb temperature. The performance of the proposed cooling system has been investigated for internal buildings loads up to 66 W·m-2 in order to examine the limitations of the cooling system. Space thermal comfort conditions and system performance metrics were assessed for four different temperate climate types as follows: cool and dry (Helsinki), cool and semi-humid (Birmingham), warm and dry (Prague), and warm and humid (Paris). The assessment shows that for the proposed system, where a radiant floor was used, can provide acceptable thermal comfort conditions for approximately 80% of the occupant hours over the respective cooling seasons.
{"title":"Analysis of a low-temperature small approach open cooling tower integrated with radiant cooling and displacement ventilation for space conditioning in temperate climates","authors":"M. Nasrabadi, D. Finn","doi":"10.1080/17512549.2022.2101524","DOIUrl":"https://doi.org/10.1080/17512549.2022.2101524","url":null,"abstract":"ABSTRACT Evaporative cooling, using cooling tower systems, has the potential to offer an alternative approach for producing high temperature chilled water, particularly for buildings located in temperate climates. The current paper examines the performance of an integrated cooling system, where an open forced draught counter flow cooling tower is used for the provision of chilled water for a radiant cooling and displacement ventilation system. For this purpose, a low temperature low approach direct evaporative cooling tower is used which can provide cooling water with low approach temperatures (1-3 K), which defines the temperature difference between the tower water outlet temperature and ambient wet bulb temperature. The performance of the proposed cooling system has been investigated for internal buildings loads up to 66 W·m-2 in order to examine the limitations of the cooling system. Space thermal comfort conditions and system performance metrics were assessed for four different temperate climate types as follows: cool and dry (Helsinki), cool and semi-humid (Birmingham), warm and dry (Prague), and warm and humid (Paris). The assessment shows that for the proposed system, where a radiant floor was used, can provide acceptable thermal comfort conditions for approximately 80% of the occupant hours over the respective cooling seasons.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"754 - 779"},"PeriodicalIF":2.0,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47925419","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}
Pub Date : 2022-07-15DOI: 10.1080/17512549.2022.2096693
M. Benchrifa, J. Mabrouki
ABSTRACT In this article we determined the total peak power to be installed, i.e. 220 kWp. In parallel, using the PVSYST software, we redesigned the PV array and we carried out a first simulation of the annual electricity production, a second simulation of the power losses and a third simulation of the saved quantity of CO2 by using the PV array. Based on the PV modules and inverters characteristics available on the local market, the number of inverters and the global investment cost of the installation which amounts to 157929,74 USD. Through these simulations, we were able to determine the annual average value of the performance ratio and the theoretical nominal output of module, which is equal to 83.1%, the energy production which is equal to 404.9 MWh, the percentage of power losses at all components of the PV field which is 16% of the total production as well as the quantity of CO2 saved by the use of this installation which is equal to 6142 tCO2 and finally we were able to calculate the price of the kWh injected into the network which is of the order of 0.034 USD /kWh and the amortization duration which is equal to 4.5 years.
{"title":"Simulation, sizing, economic evaluation and environmental impact assessment of a photovoltaic power plant for the electrification of an establishment","authors":"M. Benchrifa, J. Mabrouki","doi":"10.1080/17512549.2022.2096693","DOIUrl":"https://doi.org/10.1080/17512549.2022.2096693","url":null,"abstract":"ABSTRACT In this article we determined the total peak power to be installed, i.e. 220 kWp. In parallel, using the PVSYST software, we redesigned the PV array and we carried out a first simulation of the annual electricity production, a second simulation of the power losses and a third simulation of the saved quantity of CO2 by using the PV array. Based on the PV modules and inverters characteristics available on the local market, the number of inverters and the global investment cost of the installation which amounts to 157929,74 USD. Through these simulations, we were able to determine the annual average value of the performance ratio and the theoretical nominal output of module, which is equal to 83.1%, the energy production which is equal to 404.9 MWh, the percentage of power losses at all components of the PV field which is 16% of the total production as well as the quantity of CO2 saved by the use of this installation which is equal to 6142 tCO2 and finally we were able to calculate the price of the kWh injected into the network which is of the order of 0.034 USD /kWh and the amortization duration which is equal to 4.5 years.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"736 - 753"},"PeriodicalIF":2.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42874729","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}
Pub Date : 2022-07-14DOI: 10.1080/17512549.2022.2096692
Fatima-Zahra El-Bichri, I. Sobhy, Imane Bouchefra, B. Benhamou, H. Chehouani, Mohamed Oualid Mghazli
ABSTRACT This paper aims to identify the most suitable construction materials in terms of building’s energy performance and indoor thermal comfort for a hot and semi-arid climate. An experimental validated TRNSYS-based numerical model was set to carry out dynamic simulations for the energy performance assessment of four similar houses built with different materials, namely Cinder Blocks, Reinforced Concrete, Fired Bricks, or Rammed Earth. The results show that the rammed earth house had the best thermal performance thanks to its high thermal mass, which helped maintain a stable indoor air temperature for optimal thermal comfort. Adding shading and night natural ventilation contributed to the further improvement of the rammed earth house's thermal performance. Indeed, the annual heating/cooling load of the rammed earth house was 23%, 11% and 3% lower than the reinforced concrete, cinder blocks and fired bricks houses, respectively. These thermal load differences were much more reduced to 51%, 24% and 5%, respectively, after adding the shading and night natural ventilation techniques. Furthermore, this study evaluated the use of low embodied energy and weak carbon footprint construction materials to achieve a good building's thermal performance and acceptable indoor thermal comfort.
{"title":"Assessment of the impact of construction materials on the building’s thermal behaviour and indoor thermal comfort in a hot and semi-arid climate","authors":"Fatima-Zahra El-Bichri, I. Sobhy, Imane Bouchefra, B. Benhamou, H. Chehouani, Mohamed Oualid Mghazli","doi":"10.1080/17512549.2022.2096692","DOIUrl":"https://doi.org/10.1080/17512549.2022.2096692","url":null,"abstract":"ABSTRACT This paper aims to identify the most suitable construction materials in terms of building’s energy performance and indoor thermal comfort for a hot and semi-arid climate. An experimental validated TRNSYS-based numerical model was set to carry out dynamic simulations for the energy performance assessment of four similar houses built with different materials, namely Cinder Blocks, Reinforced Concrete, Fired Bricks, or Rammed Earth. The results show that the rammed earth house had the best thermal performance thanks to its high thermal mass, which helped maintain a stable indoor air temperature for optimal thermal comfort. Adding shading and night natural ventilation contributed to the further improvement of the rammed earth house's thermal performance. Indeed, the annual heating/cooling load of the rammed earth house was 23%, 11% and 3% lower than the reinforced concrete, cinder blocks and fired bricks houses, respectively. These thermal load differences were much more reduced to 51%, 24% and 5%, respectively, after adding the shading and night natural ventilation techniques. Furthermore, this study evaluated the use of low embodied energy and weak carbon footprint construction materials to achieve a good building's thermal performance and acceptable indoor thermal comfort.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"711 - 735"},"PeriodicalIF":2.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47172038","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}
Pub Date : 2022-07-09DOI: 10.1080/17512549.2022.2098534
Tawfeeq Wasmi M. Salih, L. Jawad
ABSTRACT This study investigates the performance of thermal insulation panels composed of the natural Luffa fibres with urea-formaldehyde resin for buildings in the hot arid region. The study has been done experimentally. The work has included the collecting of Luffa fibres from local gardens in Iraq, manufacturing the specimens and measuring the thermal conductivity for different thicknesses, densities and temperatures. The results show that the thermal conductivity of Luffa/urea-formaldehyde composite ranges between 0.22 and 0.25 W/m K. Furthermore, the k-value of the panel may differ by 5–15% depending on the thickness under testing, and by 10–20% depending on the density. However, the main advantage of Luffa composites is that the k-value of the panel is not affected too much at high temperatures, where it has been increased up to 0.26 W/m K (or by 15%) as maximum by the increase of source temperature up to 80°C. This feature has encouraged the use of these panels as external insulation layers in the hot climate region. The results taken from a simulation programme have revealed that the energy saving in the cooling load due to the use of 30-mm insulated panels made of these composites and covered by reflective foils can reach up to 30%.
{"title":"Evaluating the thermal insulation performance of composite panels made of natural Luffa fibres and urea-formaldehyde resin for buildings in the hot arid region","authors":"Tawfeeq Wasmi M. Salih, L. Jawad","doi":"10.1080/17512549.2022.2098534","DOIUrl":"https://doi.org/10.1080/17512549.2022.2098534","url":null,"abstract":"ABSTRACT This study investigates the performance of thermal insulation panels composed of the natural Luffa fibres with urea-formaldehyde resin for buildings in the hot arid region. The study has been done experimentally. The work has included the collecting of Luffa fibres from local gardens in Iraq, manufacturing the specimens and measuring the thermal conductivity for different thicknesses, densities and temperatures. The results show that the thermal conductivity of Luffa/urea-formaldehyde composite ranges between 0.22 and 0.25 W/m K. Furthermore, the k-value of the panel may differ by 5–15% depending on the thickness under testing, and by 10–20% depending on the density. However, the main advantage of Luffa composites is that the k-value of the panel is not affected too much at high temperatures, where it has been increased up to 0.26 W/m K (or by 15%) as maximum by the increase of source temperature up to 80°C. This feature has encouraged the use of these panels as external insulation layers in the hot climate region. The results taken from a simulation programme have revealed that the energy saving in the cooling load due to the use of 30-mm insulated panels made of these composites and covered by reflective foils can reach up to 30%.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"696 - 710"},"PeriodicalIF":2.0,"publicationDate":"2022-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46734503","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}
Pub Date : 2022-06-03DOI: 10.1080/17512549.2022.2084640
J. I. Kindangen, Octavianus H. A. Rogi, P. H. Gosal, V. A. Kumurur
ABSTRACT The study's uniqueness stems from its goal of determining the efficacy of natural attic vents and radiation heat barriers on galvanized metal roof buildings in lowering attic and indoor air temperatures for thermal comfort in a humid tropical climate, a topic that has received little attention in previous research. This was accomplished by utilizing three separate experimental situations using two tiny models of single-sloped zinc-roofed houses, each with varied attic ventilation openings and radiant heat barrier applications. The thermal conditions of the attic and occupant rooms in the ventilated test cell tended to be cooler than in the unventilated one in the first experiment, which compared a test cell with 20% ventilation apertures in the attic to another test cell without ventilation. The second experiment, which compared a test cell with 10% attic ventilation to another test cell (without attic ventilation) with radiant heat barrier application, found that the radiant heat barrier's effect on temperature reduction was generally better. The third experiment, which compared a test cell with 20% attic ventilation to a test cell without attic ventilation but with radiant heat barrier application, revealed that attic ventilation outperformed the radiant heat barrier in terms of temperature reduction.
{"title":"Attic ventilation and radiant heat barriers in naturally ventilated galvanized metal-Roofed buildings","authors":"J. I. Kindangen, Octavianus H. A. Rogi, P. H. Gosal, V. A. Kumurur","doi":"10.1080/17512549.2022.2084640","DOIUrl":"https://doi.org/10.1080/17512549.2022.2084640","url":null,"abstract":"ABSTRACT The study's uniqueness stems from its goal of determining the efficacy of natural attic vents and radiation heat barriers on galvanized metal roof buildings in lowering attic and indoor air temperatures for thermal comfort in a humid tropical climate, a topic that has received little attention in previous research. This was accomplished by utilizing three separate experimental situations using two tiny models of single-sloped zinc-roofed houses, each with varied attic ventilation openings and radiant heat barrier applications. The thermal conditions of the attic and occupant rooms in the ventilated test cell tended to be cooler than in the unventilated one in the first experiment, which compared a test cell with 20% ventilation apertures in the attic to another test cell without ventilation. The second experiment, which compared a test cell with 10% attic ventilation to another test cell (without attic ventilation) with radiant heat barrier application, found that the radiant heat barrier's effect on temperature reduction was generally better. The third experiment, which compared a test cell with 20% attic ventilation to a test cell without attic ventilation but with radiant heat barrier application, revealed that attic ventilation outperformed the radiant heat barrier in terms of temperature reduction.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"669 - 695"},"PeriodicalIF":2.0,"publicationDate":"2022-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47854611","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}
Pub Date : 2021-12-16DOI: 10.1080/17512549.2021.2009911
P. Sadeghian, C. Duwig, O. Sköldenberg, A. Tammelin, A. Hosseini, S. Sadrizadeh
ABSTRACT Patient warming is an efficient approach to preventing hypothermia during surgeries. Hypothermia increases the risk of postoperative infections, bleeding, transfusion demand, prolonging postoperative recovery, drug metabolism duration and vasoconstriction. Although the use of warming blankets addresses the problem of a decrease in a patient’s core body temperature, concern remains that the heat emitted by these warming blankets can disturb the supplied clean air by the ventilation system and thus increase the contamination level of airborne particles. The main purpose of this study is to numerically investigate the impact of using warming blankets on the performance of two common ventilation systems – unidirectional flow and mixing ventilation – in an operating room. The effect of using forced-air and conductive warming blankets on the distribution of bacteria-carrying particles and airflow behaviour were simulated in the operating room. The results showed that applying the forced-air warming blanket considerably increased the average air temperature at the wound area and under the surgical drape. Thus, the forced-air warming blanket can be more effective than the conductive blankets in warming the patient during the surgery. However, using the contaminated forced-air warming blanket resulted in a considerable increase in the contamination concentration at the wound surface.
{"title":"Numerical investigation of the impact of warming blankets on the performance of ventilation systems in the operating room","authors":"P. Sadeghian, C. Duwig, O. Sköldenberg, A. Tammelin, A. Hosseini, S. Sadrizadeh","doi":"10.1080/17512549.2021.2009911","DOIUrl":"https://doi.org/10.1080/17512549.2021.2009911","url":null,"abstract":"ABSTRACT Patient warming is an efficient approach to preventing hypothermia during surgeries. Hypothermia increases the risk of postoperative infections, bleeding, transfusion demand, prolonging postoperative recovery, drug metabolism duration and vasoconstriction. Although the use of warming blankets addresses the problem of a decrease in a patient’s core body temperature, concern remains that the heat emitted by these warming blankets can disturb the supplied clean air by the ventilation system and thus increase the contamination level of airborne particles. The main purpose of this study is to numerically investigate the impact of using warming blankets on the performance of two common ventilation systems – unidirectional flow and mixing ventilation – in an operating room. The effect of using forced-air and conductive warming blankets on the distribution of bacteria-carrying particles and airflow behaviour were simulated in the operating room. The results showed that applying the forced-air warming blanket considerably increased the average air temperature at the wound area and under the surgical drape. Thus, the forced-air warming blanket can be more effective than the conductive blankets in warming the patient during the surgery. However, using the contaminated forced-air warming blanket resulted in a considerable increase in the contamination concentration at the wound surface.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"589 - 611"},"PeriodicalIF":2.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41833336","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}
Pub Date : 2021-12-02DOI: 10.1080/17512549.2021.2011410
B. Abediniangerabi, A. Makhmalbaf, M. Shahandashti
ABSTRACT The selection of an energy-efficient building facade system, as one of the most important early-stage design decisions, plays a crucial role in reducing building energy use by controlling heat transmission between outdoor and indoor environments. This paper aims to evaluate the feasibility and applicability of gradient boosting machines in estimating the energy savings of different facade alternatives in the early-stage design of building facades. The energy performance of two competing facade systems was estimated for different scenarios using building energy simulations (i.e. EnergyPlusTM ). Three gradient boosting machines were developed based on the data collected from the simulation of thirteen building types in fifteen different locations (i.e. 195 scenarios). The prediction performance of gradient boosting models was compared with the building energy simulation results of two new building models that were not used in the database development phase to validate the models. Moreover, the prediction power of the trained gradient boosting models was compared with three common prediction models (i.e. Artificial Neural Networks, Random Forest, and Generalized Linear Regression) based on several performance metrics. The results showed the superiority of gradient boosting machines over other models in estimating total site energy savings, heating energy savings, and buildings’ cooling energy savings.
{"title":"Estimating energy savings of ultra-high-performance fibre-reinforced concrete facade panels at the early design stage of buildings using gradient boosting machines","authors":"B. Abediniangerabi, A. Makhmalbaf, M. Shahandashti","doi":"10.1080/17512549.2021.2011410","DOIUrl":"https://doi.org/10.1080/17512549.2021.2011410","url":null,"abstract":"ABSTRACT The selection of an energy-efficient building facade system, as one of the most important early-stage design decisions, plays a crucial role in reducing building energy use by controlling heat transmission between outdoor and indoor environments. This paper aims to evaluate the feasibility and applicability of gradient boosting machines in estimating the energy savings of different facade alternatives in the early-stage design of building facades. The energy performance of two competing facade systems was estimated for different scenarios using building energy simulations (i.e. EnergyPlusTM ). Three gradient boosting machines were developed based on the data collected from the simulation of thirteen building types in fifteen different locations (i.e. 195 scenarios). The prediction performance of gradient boosting models was compared with the building energy simulation results of two new building models that were not used in the database development phase to validate the models. Moreover, the prediction power of the trained gradient boosting models was compared with three common prediction models (i.e. Artificial Neural Networks, Random Forest, and Generalized Linear Regression) based on several performance metrics. The results showed the superiority of gradient boosting machines over other models in estimating total site energy savings, heating energy savings, and buildings’ cooling energy savings.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"542 - 567"},"PeriodicalIF":2.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48266175","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}
Pub Date : 2021-11-15DOI: 10.1080/17512549.2021.1997813
A. Martinez-Soto, María Ignacia Sáez-Lagos, R. Raslan, A. Mavrogianni
ABSTRACT A wide range of residential sector energy models have been developed in recent years to determine energy demand and CO2 emissions and to evaluate energy saving policies. However, modelling outputs are subject to significant variations due to multiple sources of uncertainty, primarily stemming from input parameters and assumptions. This study aims to assess the transferability of the Transferable Energy Model (TREM) and quantify the prediction uncertainty of residential sector energy demand until 2030 in four case study countries (Australia, Chile, United Kingdom and the United States). TREM is able to determine the future annual energy demand in the residential sector according to the area of energy use (space heating, hot water provision, cooking, electrical appliances, lighting), whilst quantifying uncertainties in the results. Significant variations (between −12% and +63%) in residential energy demand in the year 2030 with respect to 2010 were found among the case study countries, suggesting that single total energy demand estimates are associated with considerable uncertainties. This paper also presents a comprehensive database of the range of possible variations in residential energy demand related to a wide range of energy saving measures in each case study country.
{"title":"Risk identification of residential energy demand: the case studies of Australia, Chile, the United Kingdom and the United States","authors":"A. Martinez-Soto, María Ignacia Sáez-Lagos, R. Raslan, A. Mavrogianni","doi":"10.1080/17512549.2021.1997813","DOIUrl":"https://doi.org/10.1080/17512549.2021.1997813","url":null,"abstract":"ABSTRACT A wide range of residential sector energy models have been developed in recent years to determine energy demand and CO2 emissions and to evaluate energy saving policies. However, modelling outputs are subject to significant variations due to multiple sources of uncertainty, primarily stemming from input parameters and assumptions. This study aims to assess the transferability of the Transferable Energy Model (TREM) and quantify the prediction uncertainty of residential sector energy demand until 2030 in four case study countries (Australia, Chile, United Kingdom and the United States). TREM is able to determine the future annual energy demand in the residential sector according to the area of energy use (space heating, hot water provision, cooking, electrical appliances, lighting), whilst quantifying uncertainties in the results. Significant variations (between −12% and +63%) in residential energy demand in the year 2030 with respect to 2010 were found among the case study countries, suggesting that single total energy demand estimates are associated with considerable uncertainties. This paper also presents a comprehensive database of the range of possible variations in residential energy demand related to a wide range of energy saving measures in each case study country.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"514 - 541"},"PeriodicalIF":2.0,"publicationDate":"2021-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42019324","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}
Pub Date : 2021-11-11DOI: 10.1080/17512549.2021.2001369
Mohamed T. Elshazli, Mohammad Mudaqiq, T. Xing, Ahmed S. A. Ibrahim, B. Johnson, Jinchao Yuan
ABSTRACT Nowadays energy saving has become one of the most compelling sectors in the world. Thermal insulation of buildings presents an effective solution for energy conservation. Aerogel insulation is the most advanced insulation material for building application. Having low thermal conductivity around 15 mW/(m.K), high resistance to perforation, and flexibility to be cut and adapt at building site make Aerogel one of the most promising thermal insulations. In this paper, the feasibility of using Aerogel blankets as a super insulator has been experimentally verified using small scale laboratory test, large scale field test and high-fidelity computer simulations using Energy-Plus. A reduction in energy use by 23% and 38% was observed when using single (10 mm) and double (20 mm) layers of aerogel, respectively for a period of one year. Furthermore, payback analysis confirmed the effectiveness of using Aerogel. Aerogel insulation will help engineers to build energy efficient buildings.
{"title":"Experimental study of using Aerogel insulation for residential buildings","authors":"Mohamed T. Elshazli, Mohammad Mudaqiq, T. Xing, Ahmed S. A. Ibrahim, B. Johnson, Jinchao Yuan","doi":"10.1080/17512549.2021.2001369","DOIUrl":"https://doi.org/10.1080/17512549.2021.2001369","url":null,"abstract":"ABSTRACT Nowadays energy saving has become one of the most compelling sectors in the world. Thermal insulation of buildings presents an effective solution for energy conservation. Aerogel insulation is the most advanced insulation material for building application. Having low thermal conductivity around 15 mW/(m.K), high resistance to perforation, and flexibility to be cut and adapt at building site make Aerogel one of the most promising thermal insulations. In this paper, the feasibility of using Aerogel blankets as a super insulator has been experimentally verified using small scale laboratory test, large scale field test and high-fidelity computer simulations using Energy-Plus. A reduction in energy use by 23% and 38% was observed when using single (10 mm) and double (20 mm) layers of aerogel, respectively for a period of one year. Furthermore, payback analysis confirmed the effectiveness of using Aerogel. Aerogel insulation will help engineers to build energy efficient buildings.","PeriodicalId":46184,"journal":{"name":"Advances in Building Energy Research","volume":"16 1","pages":"569 - 588"},"PeriodicalIF":2.0,"publicationDate":"2021-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47984238","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：