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Solar and Heat Pump Systems: parallel vs series configurations analysis
Vega Benavente, Javier Ignacio; Cuevas, Cristian
2018
 

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Keywords :
Heat Pumps; Solar collectors; TRNSYS
Abstract :
[en] This paper presents simulations of a Solar and Heat pump System (SHP) system for Domestic Hot Water (DHW) preparation. Two system configurations are designed for covering the heat demand. These, can switch between parallel and series operation. Thus, Configuration “A” consists in using a heat pump with two evaporators that alternate: one to work as an air-to-water heat pump (HP) and the other to operate as a water-to-water HP using the solar collector’s (SC) heat. Configuration “B” implements a heat exchanger in the air-to-water HP that can pre-heat the air, using solar energy. These system configurations are modelled in the TRNSYS 17 environment for evaluating system’s performance in different climates and with different SCs. The control system applies a switching criterion between parallel or series operation modes, based primarily on the available solar irradiation. Results show that individual performance figures of the HP and the SCs increase. Nonetheless, the Seasonal Performance Factor (SPF) of the overall system decreases in most case studies (5.58 to 4.55 in the worst case). It is emphasized that the applied switching criterion does not force the SCs to increase their operational time by cooling them with the HP. In consequence, there is still potential solar energy unused that the series operation could seize.
Research center :
Departamento de Ingeniería Mecánica, Universidad de Concepción, Chile
Disciplines :
Energy
Author, co-author :
Vega Benavente, Javier Ignacio  ;  Université de Liège - ULiège > Aérospatiale et mécanique > Laboratoire de thermodynamique > Form. doct. sc. ingé. & techno. (aéro. & mécan. - Paysage)
Cuevas, Cristian;  Universidad de Concepción > Departamento de ingeniería mecánica
Language :
English
Title :
Solar and Heat Pump Systems: parallel vs series configurations analysis
Publication date :
11 December 2018
Number of pages :
20
Event name :
System Simulation in Buildings 2018
Event organizer :
ULiège - Université de Liège
Event place :
Liège, Belgium
Event date :
from 10-12-2018 to 12-12-2018
Audience :
International
Name of the research project :
FONDECYT 1150965
Funders :
CONICYT - Comisión Nacional de Investigación Científica y Tecnológica [CL]
Available on ORBi :
since 29 March 2019

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