This work presents the thermodynamic analysis of a direct-expansion solar-assisted heat pump to provide domestic hot water. An aluminum bare collector/evaporator and a compressor that uses refrigerant R600a as working fluid compose the system. Boiling and condensation temperatures are -8 and 54.4 °C, respectively. The system test is conducted under different weather conditions (i.e. rainy, cloudy and clear day), obtaining a variation of the coefficient of performance between 4.07 and 6.72 for an average solar radiation in the range of 451.6 and 721.5 W·m-2. The water final temperature attains a value between 47.7 and 58.6 °C. The system works with solar energy, both thermal and photovoltaic, to replace conventional energy sources conducing to decrease the carbon reduction factor (CFC) in 89.5 % being lower than the 1977.2 kg of annual CO2 emissions produced by an electric shower.
|Title of host publication||ICR 2019 - 25th IIR International Congress of Refrigeration|
|Publisher||International Institute of Refrigeration|
|Number of pages||13|
|State||Published - 2019|
|Event||25th IIR International Congress of Refrigeration, ICR 2019 - Montreal, Canada|
Duration: 24 Aug 2019 → 30 Aug 2019
|Name||Refrigeration Science and Technology|
|Conference||25th IIR International Congress of Refrigeration, ICR 2019|
|Period||24/08/19 → 30/08/19|
Bibliographical noteFunding Information:
The authors want to express a deep gratitude to the Renewable Energies and Mechanical Implementation of SMEs Research Group of the Universidad Politécnica Salesiana in Ecuador and the Energy and Thermodynamic Research Group of the Universidad Pontificia Bolivariana in Colombia, for supporting the accomplishment of this research.
© 2019 International Institute of Refrigeration. All rights reserved.
- Direct Expansion
- Heat Pump
- Solar Energy