High temperature heat pump operational experience as a retrofit technology in domestic sector

This paper presents operational experience of high temperature heat pump in domestic building as a retrofit technology where it displaced existing gas boiler without any modification/replacement to existing controller or radiators in the house. Heat pump was integrated with 600l thermal storage where their performance was measured for five months from November 2014 to April 2015. During five months, performance under different settings such as direct mode, storage mode and combined mode operation were analysed. Operational experience shows limitation and issues of heat pump, house heat loss/insulation and sizing of thermal storage. More details about heating demand, COP, power consumption fluctuation and storage mode performance etc., have been presented in details. This operational analysis on heat pump would give information to installer, designer and government organization regarding field trial of heat pump, design consideration and proper sizing and selection of heat pump and thermal storage as a means of demand side management technology for domestic retrofit application.