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Abstrakty
Thermal processes in a heat pump system are the subject of numerical analyses in the paper. The system considered consists of vapour compressor heat pump collaborating with a vertical ground heat exchanger and heated space. Particularly, it is equipped with a piston compressor, and the ground heat exchanger containing a row of Field pipes. The worked out numerical model of coupled thermal processes in the system is described in the paper. The model contains both the characteristic equations for heat pump unit elements and equations for the ground heat exchanger. The second ones are used for calculating unsteady temperature field in the ground and temperature distribution of intermediate heat carrier inside the pipes of the exchanger. It was assumed that the heat pump system capacity is big enough to satisfy the daily demand for heat. The heat pump compressor works within successive days as long as the daily demand for heat in the heated space is achieved. Exemplary results of calculations are also presented and analysed. The results confirm strong correlation between characteristic parameters of the heat pump unit and the ground heat ex-changer. There are also visible distinct changes of some of these parameters both during the heating season as well as during daily working time of the compressor.
Czasopismo
Rocznik
Tom
Strony
15--32
Opis fizyczny
Bibliogr. 10 poz.,Wz., rys., wykr.,
Twórcy
autor
autor
autor
- Institute of Thermal Technology, Silesian University of Technology, Konarskiego 22, 44-100 Gliwice, skladzie@itc.polsl.pl
Bibliografia
- [1] BRODOWICZ K., DYAKOWSKI T.: Heat Pumps, PWN, Warsaw 1990 (in Polish).
- [2] ZALEWSKI W.: Compressor, Sorption and Thermoelectric Heat Pumps, Theoretical Basis, Calculation Examples, IPPU MASTA, Gdańsk 2001 (in Polish).
- [3] KJELLSON E., ET AL.: Combination of solar heat and ground source heat pump for small buildings, 9th Int. Conf. on Thermal Energy Storage FUTURESTOCK'2003, Warsaw 2003, 467-472.
- [4] SANNER B.: Current status of ground source heat pumps in Europe, 9th Int. Conf. on Thermal Energy Storage FUTURESTOCK'2003, Warsaw 2003, 695-703.
- [5] NIEZGODA-ŻELASKO B.: Transient heat exchange process between ground and spiral earth heat exchanger, 9th Int. Conf. on Therm. En. Storage FUTURESTOCK'2003, Warsaw 2003, 597-602.
- [6] HELLSTRÖM G., SANNER B.: PC-programs and modelling for borehole heat exchanger design, Int. Geothermal Days Germany, GtV Geeste, 2001, Supplement 35-44.
- [7] SKŁADZIEŃ J., HANUSZKIEWICZ-DRAPAŁA M., FIC A.: Thermal analysis of vertical ground exchangers of heat pumps, Heat Transfer Engineering, 27(2006), 2, 2-13.
- [8] OLSZEWSKI P.: Analysis of operation of long-term ground energy storage with seasonal regeneration , PhD Thesis, Institute of Thermal Engineering Warsaw University of Technology, Warsaw 2005, (in Polish).
- [9] FIC A., HANUSZKIEWICZ-DRAPAŁA M., SKŁADZIEŃ J., WILK K.: Numerical analysis of the temperature field in typical cold room foundation, Archives of Thermodynamics 1-2, 1998, 103-120.
- [10] TENG, Y.M. AND AKIN, J.E.: An effective capacity approach to Stefan problems using simple isoparametric elements, Int. Com. in Heat Mass Transfer, 21(1994), 179-188.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-1839-7001