Performance Improvement Technology on a Continuous Heating Heat Pump at Frost Condition

Performance Improvement of a Heat Pump Assisted Solar Water Heating System

Details of a heat pump assisted solar water heating system, is briefly described. Refrigerants compromising of Fluorocarbons and Chlorofluorocarbons have been generally used as the working fluid. But due to its ozone depletion effect and high Global warming potential, they have been replaced by synthetic refrigerants such as R22, R134 etc. The heat pump utilizing such refrigerants has shown to ...

Residential Heat Pump Heating Performance with Single Faults Imposed

Modelling The Performance Of A Domestic Low-Temperature Heating System Based On A Heat Pump

Low temperature heating systems for single-family houses, based on heat pumps are becoming progressively more preferable in the global market. The possibility of such systems to optimise the energy utilisation and to achieve a high annual energy efficiency make them more promising for future low energy houses. In this study we model and analyse the performance of a low temperature heating syste...

Heat exchanger technology and applications: ground source heat pump system for buildings heating and cooling

The earth’s surface acts as a huge solar collector, absorbing radiation from the sun. In the UK, the ground maintains a constant temperature of 11-13oC several metres below the surface all the year around.1 Among many other alternative energy resources and new potential technologies, the ground source heat pumps (GSHPs) are receiving increasing interest because of their potential to reduce prim...

Experimental Study on the Heating Performance of a CO2 Heat Pump with Gas Injection

With the increasing of the environmental concerns, carbon dioxide (CO2) as an alternative refrigerant has been investigated intensively. In this study, the heating performance of a transcritical CO2 heat pump system with a twinrotary compressor was investigated. The transcritical CO2 heat pump with gas injection was tested by varying gas injection ratio and outdoor temperature at the optimum re...