Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
ENERGY EFFICIENCY OF A SOLAR HEAT PUMP OPERATING IN NULL SOLAR RADIATION CONDITION
Submission Author:
Sabrina Nogueira Rabelo , MG
Co-Authors:
Hélio Augusto Goulart Diniz, Neylor Makalister Ribeiro Vieira, STELLA MARYS SILVA PINHEIRO, Matheus Henrique Gonzaga Niterói, Sabrina Nogueira Rabelo
Presenter: Sabrina Nogueira Rabelo
doi://10.26678/ABCM.ENCIT2018.CIT18-0030
Abstract
The aim of this work is to carry out an analysis of the energy efficiency of an air-to-water heat pump with R134a refrigerant using experimental tests where the system operates with an immersion condenser and a solar evaporator without exposure to solar radiation. The heat rates exchanged with the solar evaporator and its efficiency were analyzed, as well as the coefficient of performance (COP) of the system. The heat pump COP was 2.29, considering the average of the five experiments conducted. The heating time of 200 liters of water from the average temperature of 32.0 ° C to 45.3 ° C was 4.3 hours. In addition, the evaporator showed to be well sized for the system, with an efficiency of 86%. This work made it possible to analyze the thermal behavior of a heat pump operating in a situation of low thermal energy availability.
Keywords
heat pump, solar evaporator, domestic water heating, immersion condenser
