Experimental Investigation on a Solar Air Heat Pump by Heat Source

Development and Experimental Investigation on Two-Stage Compression Variable Frequency Air Source Heat Pump

A two-stage compression variable frequency air source heat pump is proposed combining variable frequency technology with two-stage compression cycle. The empirical formula of optimal intermediate pressure is calculated, and two-control-model with the priority target as coefficient of performance (COP) or heating capacity is advanced in this paper. A test bench is developed for the two-stage com...

Performance Assessment of a Variable Capacity Air Source Heat Pump and a Horizontal Loop Coupled Ground Source Heat Pump System

This study evaluates the performance of air source heat pump (ASHP) and ground source heat pump (GSHP) systems individually and as part of their associated heating and cooling distribution systems in two semi-attached houses. Over the monitoring period, the performance of both heat pumps exceeded manufacturer and EnerGuide ratings, with Coefficients of Performance (COPs) above 5 in the cooling ...

Air Source Heat Pump for Northern Climates Part I: Simulation of Different Heat Pump Cycles

Performance Comparison of Hydronic Secondary Loop Heat Pump and Conventional Air-Source Heat Pump

In residential heat pump systems, the motivation for secondary loop systems is to allow for the use of flammable or toxic refrigerants with lower global warming potentials than the currently employed HFC refrigerants. The addition of radiant panels as integral building components (embedded in concrete at construction or attached to the underside of wood flooring) is becoming more common. Combin...

Experimental Investigation on the Performance of Ground-source Heat Pump with the Refrigerant R410A

Nowadays, in some small and medium-sized heat pumps, refrigerant R410A has been used widely because of the good thermodynamic performance and environmental protection. Firstly the principles of the system and the characteristics of refrigerant has been demonstrates. The paper has set up a heat pump system with the refrigerant R410A and the performance parameters under different working conditio...