Abstract
The paper compares heat pumps driven by electric motors (EHP) with heat pumps driven by gas engines (GEHP). GEHPs are still a novelty on the Polish HVACR market - therefore, the subject of the study is to indicate whether in Polish climatic conditions their use is profitable. A thorough analysis of the energy consumption of selected devices was carried out due to the consumption of utilities needed for their propulsion and the related costs. This has been done by calculating seasonal efficiency coefficients and using an innovative method of comparative modifiers allowing for unification of the performance of EHP and GEHP pumps. The results obtained include average energy efficiency coefficients, operating costs and payback times. Discussion of the calculation results proved that under certain assumptions GEHP pumps may be competitive with EHP heat pumps due to the possibility of managing waste heat at high temperatures.
Highlights
Gas engine driven heat pump (GEHP) is a relatively new technology, the first industrial application get back to 1985
GEHP is mainly used in industry, office buildings, warehouses and hotels
More powerful motors are slow-running motors with a long service life specially designed for GEHP demands
Summary
Gas engine driven heat pump (GEHP) is a relatively new technology, the first industrial application get back to 1985. GEHP is mainly used in industry, office buildings, warehouses and hotels. It is because of narrow range of products designed for individual customers. Heat pumps driven by an electric motor have been used since the 1920s. Heat pumps driven by electric and gas motors operate a left-handed Linde refrigeration cycle. The described devices cooperate with lower and upper heat sources. The lower sources are air, water and soil. The upper source can be central heating and/or domestic hot water installations. Heat pumps can be operated in water, air or direct evaporation systems [1]. Cross-section and worse electromagnetic field distribution inside the machine
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