Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
THERMAL ANALYSIS OF A HEAT PUMP SOLAR EVAPORATOR
Submission Author:
Hélio Augusto Goulart Diniz , MG , Brazil
Co-Authors:
Hélio Augusto Goulart Diniz, STELLA MARYS SILVA PINHEIRO, Andréa Oliveira Souza da Costa, Luiz Machado, Raphael Nunes Nunes de Oliveira
Presenter: Hélio Augusto Goulart Diniz
doi://10.26678/ABCM.ENCIT2020.CIT20-0229
Abstract
The use of Heat Pump for heating residential water is a better energy solution than the electric shower. It is a system that saves electrical energy and when it is assisted by solar energy its efficiency becomes even higher. However, on cloudy or rainy days, the energy availability of the environment decreases, affecting the system performance. The objective of this work is to present a theoretical and experimental thermal analysis of a solar evaporator of an air-water heat pump prototype using R134a as refrigerant and operating in a situation with zero solar radiation. A deep energetic analysis of the solar evaporator was carried out regarding the contribution of several energy sources in the environment. Contributions by ambient radiation, sensitive heat and latent heat of the air were analyzed, and their participation in the thermal contribution of the evaporator was determined. The contribution of the latent heat rate of the air in relation to the total rate exchanged with the evaporator was 24%.
Keywords
heat pump, water heating, solar evaporator, R134a
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