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The seasonal coefficient of energy transformation for real heat pump

Abstract

The resort of low potential energy for buildings heating and preparation of domestic hot water (DHW) are discussed in this paper. Real heat pump system, which was designed and mounted for individual house heating and DHW preparation, was analyzed. The purpose of this research was to explore the seasonal factor of performance for heat pump. Manufacturer and salespeople claim that the coefficient of performance (COP) for their offered equipment is 4.5 or even higher. They also calculate the energy transformation through the entire season referring to it. Actually, it is likely that the COP cannot be used when calculating the seasonal energy transformation in reality. Electricity that is seasonally consumed and the heat that is produced in all the period should be analyzed in this context. The results of this exploration show that the real seasonal factor of performance is 3.02. With reference to experience of financial support for that type of heating systems in various European countries, there is a great necessity to create similar support schemes in Lithuania. The methodology of assessing the seasonal heat pump’s factors for performance also should be prepared in Lithuania.


Article in Lithuanian.


Realus šilumos siurblio sezoninis energijos transformacijos koeficientas


Santrauka


Žemo potencialo energijos (žemės, vandens, oro) naudojimas pastatams šildyti ir karštam vandeniui ruošti – labai aktualus šių dienų klausimas. Tyrimo objektu pasirinktas individualus gyvenamasis namas Kauno rajone. Pastatas yra vieno aukšto,140 m2 šildomo ploto, 180 m2 bendro ploto. Tyrimas buvo atliekamas tiesioginio matavimo metodu, naudojant apskaitos prietaisus. Pastatui šildyti ir karštam vandeniui ruošti suprojektuotas ir įrengtas dirva/vanduo tipo šilumos siurblys, kurio deklaruojama šiluminė galia, esant grindų šildymo sistemai (veikiančiai 35/25 °C režimu), yra 11 kW, elektrinė galia – 2,45 kW. Tiriamojo objekto šilumos siurblio realus sezoninis (20 mėnesių) transformacijos koeficientas (SPF) yra 3,02, o pagaminta 1 kWh šiluminės energijos kainuoja 10,6 ct (vertinant pagal 2009 m. dviejų laiko zonų tarifą ir elektrinių viryklių elektros energijos kainas).


Reikšminiai žodžiai: šilumos siurblys, šiluminė energija, elektros energija, transformacijos koeficientas.

Keyword : heat pump, Thermal energy, electric power, conversion factor

How to Cite
Jonynas, R., Valančius, R., & Šuksteris, V. (2011). The seasonal coefficient of energy transformation for real heat pump. Mokslas – Lietuvos Ateitis / Science – Future of Lithuania, 1(1), 35-37. https://doi.org/10.3846/mla.2009.1.09
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Apr 11, 2011
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