The Experts below are selected from a list of 6519 Experts worldwide ranked by ideXlab platform
Philippe Bournot - One of the best experts on this subject based on the ideXlab platform.
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thermal performance of an integrated collector storage Solar Water Heater icsswh with phase change materials pcm
Energy Conversion and Management, 2014Co-Authors: Monia Chaabane, Hatem Mhiri, Philippe BournotAbstract:In this paper, we propose a numerical study of an integrated collector storage Solar Water Heater (ICSSWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of Solar Water Heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25 m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this Solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation.
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Thermal performance of an integrated collector storage Solar Water Heater (ICSSWH) with phase change materials (PCM)
Energy Conversion and Management, 2014Co-Authors: Monia Chaabane, Hatem Mhiri, Philippe BournotAbstract:In this paper, we propose a numerical study of an integrated collector storage Solar Water Heater (ICSSWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of Solar Water Heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25 m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this Solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation. © 2013 Elsevier Ltd. All rights reserved.
Marc A Rosen - One of the best experts on this subject based on the ideXlab platform.
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integrated collector storage Solar Water Heater with extended storage unit
Applied Thermal Engineering, 2011Co-Authors: Rakesh Kumar, Marc A RosenAbstract:The integrated collector-storage Solar Water Heater (ICSSWH) is one of the simplest designs of Solar Water Heater. In ICSSWH systems the conversion of Solar energy into useful heat is often simple, efficient and cost effective. To broaden the usefulness of ICSSWH systems, especially for overnight applications, numerous design modifications have been proposed and analyzed in the past. In the present investigation the storage tank of an ICSSWH is coupled with an extended storage section. The total volume of the modified ICSSWH has two sections. Section A is exposed to incoming Solar radiation, while section B is insulated on all sides. An expression is developed for the natural convection flow rate in section A. The inter-related energy balances are written for each section and solved to ascertain the impact of the extended storage unit on the Water temperature and the Water Heater efficiency. The volumes of Water in the two sections are optimized to achieve a maximum Water temperature at a reasonably high efficiency. The influence is investigated of inclination angle of section A on the temperature of Water Heater and the angle is optimized. It is determined that a volume ratio of 7/3 between sections A and B yields the maximum Water temperature and efficiency in the modified Solar Water Heater. The performance of the modified Water Heater is also compared with a conventional ICSSWH system under similar conditions.
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thermal performance of integrated collector storage Solar Water Heater with corrugated absorber surface
Applied Thermal Engineering, 2010Co-Authors: Rakesh Kumar, Marc A RosenAbstract:An investigation is reported of the thermal performance of an integrated Solar Water Heater with a corrugated absorber surface. The thermal performance of the rectangular collector/storage Solar Water Heater depends significantly on the heat transfer rate between the absorber surface and the Water, and on the amount of Solar radiation incident on the absorber surface. In this investigation, the surface of the absorber is considered to be corrugated, with small indentation depths, instead of plane. The modified surface has a higher characteristic length for convective heat transfer from the absorber to the Water, in addition to having more surface area exposed to Solar radiation. The corrugated surface based Solar Water Heater is determined to have a higher operating temperature for longer time than the plane surface. It means during the operation of Water Heater, more Solar energy is converted into useful heat. However, this modification has reduces the efficiency of the system marginally.
Monia Chaabane - One of the best experts on this subject based on the ideXlab platform.
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thermal performance of an integrated collector storage Solar Water Heater icsswh with phase change materials pcm
Energy Conversion and Management, 2014Co-Authors: Monia Chaabane, Hatem Mhiri, Philippe BournotAbstract:In this paper, we propose a numerical study of an integrated collector storage Solar Water Heater (ICSSWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of Solar Water Heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25 m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this Solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation.
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Thermal performance of an integrated collector storage Solar Water Heater (ICSSWH) with phase change materials (PCM)
Energy Conversion and Management, 2014Co-Authors: Monia Chaabane, Hatem Mhiri, Philippe BournotAbstract:In this paper, we propose a numerical study of an integrated collector storage Solar Water Heater (ICSSWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of Solar Water Heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25 m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this Solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation. © 2013 Elsevier Ltd. All rights reserved.
Rakesh Kumar - One of the best experts on this subject based on the ideXlab platform.
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integrated collector storage Solar Water Heater with extended storage unit
Applied Thermal Engineering, 2011Co-Authors: Rakesh Kumar, Marc A RosenAbstract:The integrated collector-storage Solar Water Heater (ICSSWH) is one of the simplest designs of Solar Water Heater. In ICSSWH systems the conversion of Solar energy into useful heat is often simple, efficient and cost effective. To broaden the usefulness of ICSSWH systems, especially for overnight applications, numerous design modifications have been proposed and analyzed in the past. In the present investigation the storage tank of an ICSSWH is coupled with an extended storage section. The total volume of the modified ICSSWH has two sections. Section A is exposed to incoming Solar radiation, while section B is insulated on all sides. An expression is developed for the natural convection flow rate in section A. The inter-related energy balances are written for each section and solved to ascertain the impact of the extended storage unit on the Water temperature and the Water Heater efficiency. The volumes of Water in the two sections are optimized to achieve a maximum Water temperature at a reasonably high efficiency. The influence is investigated of inclination angle of section A on the temperature of Water Heater and the angle is optimized. It is determined that a volume ratio of 7/3 between sections A and B yields the maximum Water temperature and efficiency in the modified Solar Water Heater. The performance of the modified Water Heater is also compared with a conventional ICSSWH system under similar conditions.
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thermal performance of integrated collector storage Solar Water Heater with corrugated absorber surface
Applied Thermal Engineering, 2010Co-Authors: Rakesh Kumar, Marc A RosenAbstract:An investigation is reported of the thermal performance of an integrated Solar Water Heater with a corrugated absorber surface. The thermal performance of the rectangular collector/storage Solar Water Heater depends significantly on the heat transfer rate between the absorber surface and the Water, and on the amount of Solar radiation incident on the absorber surface. In this investigation, the surface of the absorber is considered to be corrugated, with small indentation depths, instead of plane. The modified surface has a higher characteristic length for convective heat transfer from the absorber to the Water, in addition to having more surface area exposed to Solar radiation. The corrugated surface based Solar Water Heater is determined to have a higher operating temperature for longer time than the plane surface. It means during the operation of Water Heater, more Solar energy is converted into useful heat. However, this modification has reduces the efficiency of the system marginally.
Hatem Mhiri - One of the best experts on this subject based on the ideXlab platform.
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thermal performance of an integrated collector storage Solar Water Heater icsswh with phase change materials pcm
Energy Conversion and Management, 2014Co-Authors: Monia Chaabane, Hatem Mhiri, Philippe BournotAbstract:In this paper, we propose a numerical study of an integrated collector storage Solar Water Heater (ICSSWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of Solar Water Heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25 m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this Solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation.
-
Thermal performance of an integrated collector storage Solar Water Heater (ICSSWH) with phase change materials (PCM)
Energy Conversion and Management, 2014Co-Authors: Monia Chaabane, Hatem Mhiri, Philippe BournotAbstract:In this paper, we propose a numerical study of an integrated collector storage Solar Water Heater (ICSSWH). Two numerical models in three-dimensional modeling are developed. The first one which describes a sensible heat storage unit (SHSU), allowing validating the numerical model. Based on the good agreement between numerical results and experimental data from literature, and as this type of Solar Water Heater presents the disadvantage of its high night losses, we propose to integrate a phase change material (PCM) directly in the collector and to study its effect on the ICSSWH thermal performance. Indeed, a second 3D CFD model is developed and series of numerical simulations are conducted for two kind (myristic acid and RT42-graphite) and three radiuses (R = 0.2 m, R = 0.25 m and R = 0.3 m) of this PCM layer. Numerical results show that during the day-time, the latent heat storage unit (LHSU) performs better than the sensible one when myristic acid is used as PCM. Regarding the night operating of this Solar system, it is found that the LHSU is more effective for both PCMs as it allows lower thermal losses and better heat preservation. © 2013 Elsevier Ltd. All rights reserved.
