The Development and Investigation of the High Temperature & Instant Heat Multifunction Heat-Pump System
Date Issued
2011
Date
2011
Author(s)
Chung, Hsing-Da
Abstract
The main purpose of this research is to replace traditional gas or electric water-heater with heat-pump system. Not only could the heat-pump system produce heat in a highly efficient way but the energy-using could be more efficient by using both the cooling side and the heating side of this system. Then design two heat-pump systems’ waterway based on traditional cascade heat-pump system concept. Moreover, design two systems in series-mode and parallel-mode to provide instant heat water.
This research divides into two parts: medium-temperature and high-temperature heat-pump. First, use National Standard Testing Method in the medium-temperature heat-pump to analyze the influence on heat-pump system in different volume flow rate. And use experimental data to establish characteristic equation for further analysis. High-temperature heat-pump uses the new refrigerant called as R-245fa to experiment and uses normal vapor compression system component to establish, test and estimate the feasibility.
In the second part, use medium-temperature experiment data cooperating with waterway design to analyze the series and parallel-mode systems. Moreover, use Thermodynamics and Heat Transfer to simulate the temperature of leaving water, COP and etcetera. The result shows that two medium-temperature heat-pump running as parallel mode at hot water flow rate equals to 10LPM has 52.9oC supply water while system COP larger with water flow rate larger. On the other hand, series-mode performance related to system overlap temperature(DT) while smaller DT gives larger COP.
Subjects
Heat-pump water heater
Series-mode
Parallel-mode
Instant heat
Performance Investigation
Type
thesis
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