Evaluation of a Ground Source Heat Pump System for Varying Loads and Return Water Temperatures using Different System Performance Factors

Files in This Item:
File Description SizeFormat 
IIR Prague done.pdf760.79 kBAdobe PDFDownload
Title: Evaluation of a Ground Source Heat Pump System for Varying Loads and Return Water Temperatures using Different System Performance Factors
Authors: Edwards, Killian C.
Jones, A. T.
Finn, Donal
Permanent link: http://hdl.handle.net/10197/4712
Date: 2011
Abstract: A quasi-steady state mathematical model of a ground source heat pump has been developed. Heating and cooling is delivered to the building using fan coil units, which are either in constant operation (Strategy 1) or switched on/off as water flow to the coil is diverted (Strategy 2). The performance of the system is evaluated using a system performance factor (SPF). It was observed that values for SPF4 (which includes all components) decreases for decreasing building load. For strategy 2, the energy saving associated with SPF4 are greater than Strategy 1, but savings are diminished at higher loads. Improved system performance was observed at lower return water temperatures in heating and higher return temperatures in cooling. However, in both cases the capacity of the fan coil units is reduced. The temperature compensation strategy developed resulted in an improved SPF4 for Strategy 1 and a less significant improvement for Strategy 2.
Type of material: Conference Publication
Publisher: The International Institute of Refrigeration
Copyright (published version): 2011 the authors
Keywords: Ground source heat pump
Language: en
Status of Item: Not peer reviewed
Conference Details: 23rd IIR International Congress of Refrigeration, Prague, August 21-26, 2011
Appears in Collections:Mechanical & Materials Engineering Research Collection

Show full item record

Page view(s) 50

58
checked on May 25, 2018

Download(s) 20

234
checked on May 25, 2018

Google ScholarTM

Check


This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.