Performance Analysis of a Direct-Expansion Solar-Assisted Heat Pump Using a Photovoltaic/Thermal System for Water Heating

William Quitiaquez, Isaac Simbaña, C. A. Isaza-Roldán, César Nieto-Londoño, Patricio Quitiaquez, Luis Toapanta-Ramos

Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución de conferenciarevisión exhaustiva

Resumen

This work presents the performance of a direct-expansion solar-assisted heat pump (DX-SAHP) to supply 60 L per day of domestic hot water. The operating values in tests, such as refrigerant pressure and temperature, were taken in a built prototype every five minutes. The weather data measurements were obtained with a WS-1201 meteorological weather station and a CMP3 pyranometer. Boiling took place in a bare flat-plate solar collector using ambient temperature and the solar radiation intensity, with an emissivity value of 0.10. The system used a photovoltaic panel to turn on a variable speed compressor with 95 W of maximum power at 3600 rpm using R134a as working fluid. The measured condensation average temperature was 41.2 °C, meanwhile boiling temperature was 5.5 °C, gaining 252.8 W in the collector/evaporator and allowing releasing 335.8 W in the condenser while water reached a maximum temperature of 39.7 °C. In Test 1, when solar radiation had an average daily value of 607.5 W/m2 with an average ambient temperature of 25.5 °C, water raised its temperature from 17.5 to 39.3 °C in 35 min. The maximum coefficient of performance (COP) of the system was 5.75 under rainy conditions in Test 2. Results showed that while the solar radiation intensity or ambient temperature were increased, the water heating time decreased. The environmental study also showed that by the implementation of the DX-SAHP, it could stop emitting 1065.6 kg of CO2 per year due to the system using renewable energy for its working.

Idioma originalInglés
Título de la publicación alojadaSmart Technologies, Systems and Applications - 1st International Conference, SmartTech-IC 2019, Proceedings
EditoresFabián R. Narváez, Diego F. Vallejo, Paulina A. Morillo, Julio R. Proaño
EditorialSpringer
Páginas89-102
Número de páginas14
ISBN (versión impresa)9783030467845
DOI
EstadoPublicada - 1 ene 2020
Evento1st International Conference on Smart Technologies, Systems and Applications, SmartTech-IC 2019 - Quito, Ecuador
Duración: 2 dic 20194 dic 2019

Serie de la publicación

NombreCommunications in Computer and Information Science
Volumen1154 CCIS
ISSN (versión impresa)1865-0929
ISSN (versión digital)1865-0937

Conferencia

Conferencia1st International Conference on Smart Technologies, Systems and Applications, SmartTech-IC 2019
País/TerritorioEcuador
CiudadQuito
Período2/12/194/12/19

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