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3. Testing the performance of a prototype thermal energy storage tank working with organic phase change material for space heating application conditions

Author

Koukou Maria K., Vrachopoulos Michail Gr., Dogkas George, Pagkalos Christos, Lymperis Kostas, Coelho Luis, and Rebola Amandio

Subjects
Environmental sciences, GE1-350
Abstract

A prototype Latent Heat Thermal Energy Storage (LHTES) unit has been designed, constructed, and experimentally analysed for its thermal storage performance under different operational conditions considering heating application and exploiting solar and geothermal energy. The system consists of a rectangular tank filled with Phase Change Material (PCM) and a finned tube staggered Heat Exchanger (HE) while water is used as Heat Transfer Fluid (HTF). Different HTF inlet temperatures and flow rates were tested to find out their effects on LHTES performance. Thermal quantities such as HTF outlet temperature, heat transfer rate, stored energy, were evaluated as a function of the conditions studied. Two commercial organic PCMs were tested A44 and A46. Results indicate that A44 is more efficient during the charging period, taking into account the two energy sources, solar and heat pump. During the discharging process, it exhibits higher storage capacity than A46. Concluding, the developed methodology can be applied to study different PCMs and building applications.

Published
2019
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4. Evaluating a prototype compact thermal energy storage tank using paraffin-based phase change material for domestic hot water production

Author

Dogkas George, Konstantaras John, Koukou Maria K., Stathopoulos Vassilis N., Coelho Luis, and Rebola Amandio

Subjects
Environmental sciences, GE1-350
Abstract

A full-scale thermal energy storage system using phase change materials (PCM) is experimentally investigated for solar and geothermal applications. The system consists of a rectangular tank filled with PCM and a staggered fin tube heat exchanger (HE). The system is designed for the production of Domestic Hot Water (DHW) based on the EU Commission Regulation No 814/2013 [1] requirements. The characteristics that are studied are the stored energy density of the system, the heat transfer rate through the HE during the charging and discharging processes, the adequacy of produced hot water amount and the storage efficiency of the tank. The results of the experiments confirmed the potential of the system to meet several prerequisites of a DHW installation and in addition to make the operation of the coupled solar collector or ground heat pump efficient.

Published
2019
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8. Development and experimental testing of a compact thermal energy storage tank using paraffin targeting domestic hot water production needs

Author

Dogkas, George, primary, Konstantaras, John, additional, Koukou, Maria K., additional, Gr. Vrachopoulos, Michail, additional, Pagkalos, Christos, additional, Stathopoulos, Vassilis N., additional, Pandis, Pavlos K., additional, Lymperis, Kostas, additional, Coelho, Luis, additional, and Rebola, Amandio, additional

Published
2020
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11. Investigating the performance of a thermal energy storage unit with paraffin as phase change material, targeting buildings’ cooling needs: an experimental approach

Author

Dogkas, George, primary, Koukou, Maria K., additional, Konstantaras, John, additional, Pagkalos, Christos, additional, Lymperis, Kostas, additional, Stathopoulos, Vassilis, additional, Coelho, Luis, additional, Rebola, Amandio, additional, and Vrachopoulos, Michail Gr., additional

Published
2020
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14. Performance Evaluation of a Small-Scale Latent Heat Thermal Energy Storage Unit for Heating Applications Based on a Nanocomposite Organic PCM

Author

Koukou, Maria K., primary, Dogkas, George, additional, Vrachopoulos, Michail Gr., additional, Konstantaras, John, additional, Pagkalos, Christos, additional, Lymperis, Kostas, additional, Stathopoulos, Vassilis, additional, Evangelakis, George, additional, Prouskas, Costas, additional, Coelho, Luis, additional, and Rebola, Amandio, additional

Published
2019
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