Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
THERMAL PERFORMANCE OF A HEAT PUMP WITH SOLAR EVAPORATOR UNDER ZERO SOLAR RADIATION CONDITIONS
Submission Author:
Hélio Augusto Goulart Diniz , MG , Brazil
Co-Authors:
Hélio Augusto Goulart Diniz, Fernando Neves Quintino dos Santos, Juan Jose Garcia Pabon, Ricardo Koury, Luiz Machado
Presenter: Fernando Neves Quintino dos Santos
doi://10.26678/ABCM.COBEM2017.COB17-2566
Abstract
Heat pumps are a feasible way to heat water at low costs. In regions of high insolation, the use of solar evaporators raises the performance of the heat pump, however little data exists within cloudy and rainy environments. The objective of this paper is to analyze the thermal performance of a direct expansion heat pump assisted with a solar evaporator and a coaxial condenser, used to fill a 200 L tank with hot water. The prototype was tested under no direct solar exposure, in an in-door laboratory environment. The heating capacity, compressor power and a coefficient of performance showed little variations. The heat transfer rate from the water that condensate in the evaporator provided to be significant, approximately 46 % of energy the fluid absorbed in the evaporator. Due to the water condensate, the use of heat pumps with solar evaporators become feasible even cloudy environments or at night.
Keywords
heat pump, solar evaporator, water heating, coaxial condenser, R134a
