Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
THERMAL PERFORMANCE ANALYSIS OF A HEAT PUMP WITH SOLAR EVAPORATOR
Submission Author:
Hélio Augusto Goulart Diniz , MG , Brazil
Co-Authors:
Hélio Augusto Goulart Diniz, André Argueso Machado, Oscar Ricardo Sandoval Rodriguez, Ivo Zatti Lima Meyer, Nicolas Cristiano Gomes de Oliveira
Presenter: Hélio Augusto Goulart Diniz
doi://10.26678/ABCM.COBEM2017.COB17-2575
Abstract
Water heating for residential use is traditionally done using electric resistance in Brazil. However due to the rising electrical energy production costs and consumption, the search for more efficient equipment is important. Among other solutions, is the use of HP (Heat Pump) as a substitute to the electric shower. The purpose of this paper is to analyze the thermal performance (based on experimental trails) of an air-water HP using refrigerant fluid R-134a. This equipment operates with a submerged condenser in a water tank with 200 liters of volume, and a solar evaporator exposed to radiation from the sun. The heat rates of the solar evaporator and its efficiency, as well as the system coefficient of performance (COP) were analyzed. The HP COP was 2.76, considering the average of the five experiments done. The water heating time for 200 liters with an average temperature of 29.2ºC to 45.3ºC was 3 hours and 21 minutes. In addition to that, the evaporator dimensioning was properly done, presenting efficiency of 89%. This work allowed the analysis of the thermal performance of a HP operating under a high availability of thermal energy, which is, exposed to the sun. This situation represents an optimal set up that increases the COP, making it possible to predict the residential operation for most of the days in a region with high sun incidence e climatic regularity.
Keywords
heat pump, solar evaporator, water heating, R134a, submerged condenser
