Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage
A novel Integrated Collector Storage Solar Water Heater (ICSSWH) has been developed, in a variety of 3 sizes, and investigated at outdoor conditions, in the Greek climate. The devices consist of flat-plate collectors integrated with latent heat storage tanks at their back, filled with a Phase Change...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202725000394 |
| _version_ | 1826541121061257216 |
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| author | Maria K. Koukou John Konstantaras George Dogkas Kostas Lymperis Vassilis N. Stathopoulos Michail Gr. Vrachopoulos Eleni Douvi Υannis Caouris Petros Dimas |
| author_facet | Maria K. Koukou John Konstantaras George Dogkas Kostas Lymperis Vassilis N. Stathopoulos Michail Gr. Vrachopoulos Eleni Douvi Υannis Caouris Petros Dimas |
| author_sort | Maria K. Koukou |
| collection | DOAJ |
| description | A novel Integrated Collector Storage Solar Water Heater (ICSSWH) has been developed, in a variety of 3 sizes, and investigated at outdoor conditions, in the Greek climate. The devices consist of flat-plate collectors integrated with latent heat storage tanks at their back, filled with a Phase Change Material (PCM). A conventional paraffin wax PCM was applied, with a melting point of 53 °C. Two heat exchanger circuits, a closed loop collector-storage circuit for charging and an open loop (service water) for discharging process are immersed in the PCM tank. The heat charging and discharging processes of the storage tank are investigated, for various charging and discharging flow rates. The three device storage sizes have total volumes of 0.620, 0.808 and 1.148 m3, with corresponding solar collector areas of 1.51, 2.02 and 2.92 m2. During discharging, the stored heat in the PCM is delivered to tap water. A minimum acceptable water temperature of 38 °C is considered, according to international standards. Under normal insolation conditions, daily stored heat of about 4.2, 6.2 and 9 kWh were measured for the three mentioned sizes, respectively. Of this amount, about 3, 4.8 and 7 kWh were transferred to tap water, respectively. The heat transferred to the storage tank was above 41 % of the daily incident solar energy on the collector plane, for all studied cases. The daily hot water production was measured up to 88.4 ℓ, 137 ℓ and 190 ℓ for each mentioned size. Details of the Heat Transfer Fluid (HTF) and tap water temperature profiles are also extracted and presented. |
| first_indexed | 2025-02-16T19:36:55Z |
| format | Article |
| id | doaj.art-5306fe2edc9c4c2ca50794d24d553521 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2025-03-14T04:09:14Z |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-5306fe2edc9c4c2ca50794d24d5535212025-03-08T04:23:54ZengElsevierInternational Journal of Thermofluids2666-20272025-03-0126101091Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storageMaria K. Koukou0John Konstantaras1George Dogkas2Kostas Lymperis3Vassilis N. Stathopoulos4Michail Gr. Vrachopoulos5Eleni Douvi6Υannis Caouris7Petros Dimas8Department of Agricultural Development, Agri-Food and Natural Resources Management, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, Greece; Corresponding author.Department of Agricultural Development, Agri-Food and Natural Resources Management, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, GreeceDepartment of Agricultural Development, Agri-Food and Natural Resources Management, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, GreeceDepartment of Agricultural Development, Agri-Food and Natural Resources Management, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, GreeceDepartment of Agricultural Development, Agri-Food and Natural Resources Management, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, GreeceDepartment of Agricultural Development, Agri-Food and Natural Resources Management, National and Kapodistrian University of Athens, 344 00 Psachna Campus, Evia, GreeceDepartment of Mechanical Engineering & Aeronautics, University of Patras, 26504 Rio Achaia, GreeceDepartment of Mechanical Engineering & Aeronautics, University of Patras, 26504 Rio Achaia, GreeceDimas S.A., 21200 Argos Argolida, GreeceA novel Integrated Collector Storage Solar Water Heater (ICSSWH) has been developed, in a variety of 3 sizes, and investigated at outdoor conditions, in the Greek climate. The devices consist of flat-plate collectors integrated with latent heat storage tanks at their back, filled with a Phase Change Material (PCM). A conventional paraffin wax PCM was applied, with a melting point of 53 °C. Two heat exchanger circuits, a closed loop collector-storage circuit for charging and an open loop (service water) for discharging process are immersed in the PCM tank. The heat charging and discharging processes of the storage tank are investigated, for various charging and discharging flow rates. The three device storage sizes have total volumes of 0.620, 0.808 and 1.148 m3, with corresponding solar collector areas of 1.51, 2.02 and 2.92 m2. During discharging, the stored heat in the PCM is delivered to tap water. A minimum acceptable water temperature of 38 °C is considered, according to international standards. Under normal insolation conditions, daily stored heat of about 4.2, 6.2 and 9 kWh were measured for the three mentioned sizes, respectively. Of this amount, about 3, 4.8 and 7 kWh were transferred to tap water, respectively. The heat transferred to the storage tank was above 41 % of the daily incident solar energy on the collector plane, for all studied cases. The daily hot water production was measured up to 88.4 ℓ, 137 ℓ and 190 ℓ for each mentioned size. Details of the Heat Transfer Fluid (HTF) and tap water temperature profiles are also extracted and presented.http://www.sciencedirect.com/science/article/pii/S2666202725000394ICSSWHLatent heat storagePCMDomestic hot waterSolarExperiment |
| spellingShingle | Maria K. Koukou John Konstantaras George Dogkas Kostas Lymperis Vassilis N. Stathopoulos Michail Gr. Vrachopoulos Eleni Douvi Υannis Caouris Petros Dimas Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage International Journal of Thermofluids ICSSWH Latent heat storage PCM Domestic hot water Solar Experiment |
| title | Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage |
| title_full | Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage |
| title_fullStr | Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage |
| title_full_unstemmed | Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage |
| title_short | Investigation of an innovative flat-plate integrated collector-storage solar water heater with latent heat storage |
| title_sort | investigation of an innovative flat plate integrated collector storage solar water heater with latent heat storage |
| topic | ICSSWH Latent heat storage PCM Domestic hot water Solar Experiment |
| url | http://www.sciencedirect.com/science/article/pii/S2666202725000394 |
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