The Experts below are selected from a list of 120 Experts worldwide ranked by ideXlab platform
Frank Bruno - One of the best experts on this subject based on the ideXlab platform.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 1: Impact of tube configuration on discharging effectiveness
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:Effective extraction of latent energy is critical in phase change material (PCM) thermal storage applications, including CSP plants. For tube-in-tank Arrangements, research to date has not explicitly investigated the impact of the boundary condition applied to the PCM surrounding the tube on the heat transfer process. In Part 1 of this study, the impact of this boundary condition was investigated by applying different tube configurations, defined by the heat transfer fluid either flowing parallel, Counterflow or in a serpentine Arrangement. The study identified that the critical factor was the loss of heat transfer area experienced once the phase front between parallel tubes meet. This was significant for parallel flow but essentially eliminated for the Counterflow Arrangement, which delivered a more uniform phase front parallel to the tube wall. As a result it was identified that the amount of redundant PCM when applying the Counterflow Arrangement was 9%, while this value was 32% for the parallel flow Arrangement. This difference has a significant impact on the cost of thermal storage for CSP plants. Part 2 will involve a parametric assessment of the parallel and Counterflow configurations.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 2: Parametric assessment and impact of latent fraction
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:The tube-in-tank is a compact configuration well suited for PCM thermal storage systems. However limited research has investigated the impact of the boundary condition applied to the PCM achieved through differing tube Arrangements. In Part 1, using CFD and considering the discharging condition for CSP applications, it was determined that when the heat transfer fluid flow was in parallel, poor extraction of latent energy occurs, whereas in a Counterflow Arrangement maximum latent energy is extracted. In Part 2, the impact of mass flow rate and PCM thermal conductivity on the extraction of latent energy for these tube Arrangements was investigated. It was discovered that the Counterflow Arrangement can experience poorer heat transfer which can be avoided through design. Furthermore, little investigation has considered the impact of the effectiveness of heat transfer with PCM systems with increased amounts of sensible energy, typical for CSP applications. It was determined that for latent dominant storage systems, the Counterflow tube Arrangement should be applied, while for sensible dominant PCM storage systems, parallel flow should be considered.
Nguyen Minh Phu - One of the best experts on this subject based on the ideXlab platform.
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Overall Optimization and Exergy Analysis of an Air Conditioning System Using a Series-Series Counterflow Arrangement of Water Chillers
International Journal of Air-conditioning and Refrigeration, 2019Co-Authors: Nguyen Minh PhuAbstract:When water chillers are arranged in series-series Counterflow (SSCF), the compressor lift of each chiller is decreased in comparison with that of water chillers in parallel. This means that the com...
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Overall Optimization and Exergy Analysis of an Air Conditioning System Using a Series-Series Counterflow Arrangement of Water Chillers
International Journal of Air-Conditioning and Refrigeration, 2019Co-Authors: Nguyen Minh PhuAbstract:When water chillers are arranged in series-series Counterflow (SSCF), the compressor lift of each chiller is decreased in comparison with that of water chillers in parallel. This means that the compressor power of SSCF chillers is lower than that of parallel chillers. In this paper, models of the main components in an air conditioning system were developed and verified to predict the behaviors of the whole system with respect to SSCF chillers. The results showed that performance was maximized with three SSCF chillers when the system was operated with normal set points. The performance was further improved to 26% and decreased with the number of SSCF chillers when the system was operated with optimal set points. The SSCF chiller system also demonstrated higher exergy efficiency regardless of the number of SSCF chillers. The irreversibility of components in SSCF chillers was rather low. However, the irreversibility of the cooling tower and cooling coil was slightly higher and lower, respectively, than those in the parallel chiller system.
Martin Belusko - One of the best experts on this subject based on the ideXlab platform.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 1: Impact of tube configuration on discharging effectiveness
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:Effective extraction of latent energy is critical in phase change material (PCM) thermal storage applications, including CSP plants. For tube-in-tank Arrangements, research to date has not explicitly investigated the impact of the boundary condition applied to the PCM surrounding the tube on the heat transfer process. In Part 1 of this study, the impact of this boundary condition was investigated by applying different tube configurations, defined by the heat transfer fluid either flowing parallel, Counterflow or in a serpentine Arrangement. The study identified that the critical factor was the loss of heat transfer area experienced once the phase front between parallel tubes meet. This was significant for parallel flow but essentially eliminated for the Counterflow Arrangement, which delivered a more uniform phase front parallel to the tube wall. As a result it was identified that the amount of redundant PCM when applying the Counterflow Arrangement was 9%, while this value was 32% for the parallel flow Arrangement. This difference has a significant impact on the cost of thermal storage for CSP plants. Part 2 will involve a parametric assessment of the parallel and Counterflow configurations.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 2: Parametric assessment and impact of latent fraction
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:The tube-in-tank is a compact configuration well suited for PCM thermal storage systems. However limited research has investigated the impact of the boundary condition applied to the PCM achieved through differing tube Arrangements. In Part 1, using CFD and considering the discharging condition for CSP applications, it was determined that when the heat transfer fluid flow was in parallel, poor extraction of latent energy occurs, whereas in a Counterflow Arrangement maximum latent energy is extracted. In Part 2, the impact of mass flow rate and PCM thermal conductivity on the extraction of latent energy for these tube Arrangements was investigated. It was discovered that the Counterflow Arrangement can experience poorer heat transfer which can be avoided through design. Furthermore, little investigation has considered the impact of the effectiveness of heat transfer with PCM systems with increased amounts of sensible energy, typical for CSP applications. It was determined that for latent dominant storage systems, the Counterflow tube Arrangement should be applied, while for sensible dominant PCM storage systems, parallel flow should be considered.
Min Liu - One of the best experts on this subject based on the ideXlab platform.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 1: Impact of tube configuration on discharging effectiveness
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:Effective extraction of latent energy is critical in phase change material (PCM) thermal storage applications, including CSP plants. For tube-in-tank Arrangements, research to date has not explicitly investigated the impact of the boundary condition applied to the PCM surrounding the tube on the heat transfer process. In Part 1 of this study, the impact of this boundary condition was investigated by applying different tube configurations, defined by the heat transfer fluid either flowing parallel, Counterflow or in a serpentine Arrangement. The study identified that the critical factor was the loss of heat transfer area experienced once the phase front between parallel tubes meet. This was significant for parallel flow but essentially eliminated for the Counterflow Arrangement, which delivered a more uniform phase front parallel to the tube wall. As a result it was identified that the amount of redundant PCM when applying the Counterflow Arrangement was 9%, while this value was 32% for the parallel flow Arrangement. This difference has a significant impact on the cost of thermal storage for CSP plants. Part 2 will involve a parametric assessment of the parallel and Counterflow configurations.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 2: Parametric assessment and impact of latent fraction
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:The tube-in-tank is a compact configuration well suited for PCM thermal storage systems. However limited research has investigated the impact of the boundary condition applied to the PCM achieved through differing tube Arrangements. In Part 1, using CFD and considering the discharging condition for CSP applications, it was determined that when the heat transfer fluid flow was in parallel, poor extraction of latent energy occurs, whereas in a Counterflow Arrangement maximum latent energy is extracted. In Part 2, the impact of mass flow rate and PCM thermal conductivity on the extraction of latent energy for these tube Arrangements was investigated. It was discovered that the Counterflow Arrangement can experience poorer heat transfer which can be avoided through design. Furthermore, little investigation has considered the impact of the effectiveness of heat transfer with PCM systems with increased amounts of sensible energy, typical for CSP applications. It was determined that for latent dominant storage systems, the Counterflow tube Arrangement should be applied, while for sensible dominant PCM storage systems, parallel flow should be considered.
N. H.s. Tay - One of the best experts on this subject based on the ideXlab platform.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 1: Impact of tube configuration on discharging effectiveness
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:Effective extraction of latent energy is critical in phase change material (PCM) thermal storage applications, including CSP plants. For tube-in-tank Arrangements, research to date has not explicitly investigated the impact of the boundary condition applied to the PCM surrounding the tube on the heat transfer process. In Part 1 of this study, the impact of this boundary condition was investigated by applying different tube configurations, defined by the heat transfer fluid either flowing parallel, Counterflow or in a serpentine Arrangement. The study identified that the critical factor was the loss of heat transfer area experienced once the phase front between parallel tubes meet. This was significant for parallel flow but essentially eliminated for the Counterflow Arrangement, which delivered a more uniform phase front parallel to the tube wall. As a result it was identified that the amount of redundant PCM when applying the Counterflow Arrangement was 9%, while this value was 32% for the parallel flow Arrangement. This difference has a significant impact on the cost of thermal storage for CSP plants. Part 2 will involve a parametric assessment of the parallel and Counterflow configurations.
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Effective tube-in-tank PCM thermal storage for CSP applications, Part 2: Parametric assessment and impact of latent fraction
Solar Energy, 2016Co-Authors: Martin Belusko, N. H.s. Tay, Min Liu, Frank BrunoAbstract:The tube-in-tank is a compact configuration well suited for PCM thermal storage systems. However limited research has investigated the impact of the boundary condition applied to the PCM achieved through differing tube Arrangements. In Part 1, using CFD and considering the discharging condition for CSP applications, it was determined that when the heat transfer fluid flow was in parallel, poor extraction of latent energy occurs, whereas in a Counterflow Arrangement maximum latent energy is extracted. In Part 2, the impact of mass flow rate and PCM thermal conductivity on the extraction of latent energy for these tube Arrangements was investigated. It was discovered that the Counterflow Arrangement can experience poorer heat transfer which can be avoided through design. Furthermore, little investigation has considered the impact of the effectiveness of heat transfer with PCM systems with increased amounts of sensible energy, typical for CSP applications. It was determined that for latent dominant storage systems, the Counterflow tube Arrangement should be applied, while for sensible dominant PCM storage systems, parallel flow should be considered.
