Evaluation of the annual performance of Ground Source Heat Pump systems: A comparison between single speed and variable speed systems
2011 (English)In: 23rd IIR International Congress of Refrigeration, International Institute of Refrigeration, 2011, 3741-3748 p.Conference paper (Refereed)
In the present paper, modelling and simulation was carried out for a Ground Source Heat Pump (GSHP) system in the presence of all the most important interacting sub-systems such as building, ground heat source, electrical auxiliary heater, and the heat pump unit in order to make a fair and comprehensive comparison between the annual performance of on/off controlled and variable capacity systems. The annual modelling showed that dimensioning of the on/off controlled GSHP based on the peak heat demand of the building plays a significant role when two control strategies are compared: if the on/off controlled GSHP is dimensioned to cover only 57% of the peak heat demand of the building, the electrical auxiliary, which covers about 10% of the annual heating demand of the building, makes the SPF of the on/off controlled GSHP be lower than the one of the variable speed system. On the contrary, when the on/off controlled system is dimensioned to cover about 70% of the building’s peak heat demand, i.e. about 98% of the annual heat demand of the building, the SPF of the on/off controlled system can higher than the variable capacity systems.
Place, publisher, year, edition, pages
International Institute of Refrigeration, 2011. 3741-3748 p.
, Congres International du Froid-International Congress of Refrigeration, ISSN 1025-9031 ; 23
ground source, heat pump, variable speed, single speed, capacity control, control
IdentifiersURN: urn:nbn:se:kth:diva-63215ISI: 000310485802020ISBN: 978-2-913149-88-5OAI: oai:DiVA.org:kth-63215DiVA: diva2:481816
23rd IIR International Congress of Refrigeration, Prague, Czech Republic, August 21-26 2011
QC 201204102012-01-222012-01-222014-01-14Bibliographically approved