Wymienniki gruntowe typu "U-rura" współpracujące z pompami ciepła

• Autorzy: Kujawa T.

Warianty tytułu

EN

The ground heat exchangers of "u-pipe" type cooperating with heat pumps

• Konferencja: ENERGETYKA 2004 / International Scientific and Technical Conference [3; 2004; Wrocław, Poland]
• Języki publikacji: PL

Abstrakty

PL

Zastosowanie pomp ciepła, wykorzystujących jako dolne źródło ciepła energie, gruntu, z pionowymi wymiennikami gruntowymi, wymaga prawidłowego doboru wielkości pompy ciepła (jej mocy) oraz obliczenia długości wymiennika gruntowego przy danym rodzaju gruntu. Dotychczasowe metody projektowania mogą być przyczyną określonych błędów wynikających xc znacznych uproszczeń w stosowanych modelach obliczeniowych (co wykazano w pracy [1]) i może negatywnie rautować na prace, układu, efektywność pozyskiwanej energii oraz ekonomiczność stosowania instalacji. W pracy przeanalizowano różnice w wydajności cieplnej i temperaturach czynnika pobierającego ciepło z gruntu przy obliczaniu wymiennika typu „U-rura" stosowanymi metodami obliczeniowymi [2-8] i w opaciu o model zaprezentowany w pracy [1] oraz podano wnioski stąd wynikające.

EN

The pumps co-operating with vertical ground heat exchangers applied for winning the ground energy used for heating in house building needs accurate choice of parameters of the pump (its capacity) and calculation of the length of a heat exchanger for given type of the ground. Substantial simplifications in computational models, have been used so far at designing stage of the installation, might be a cause of some errors which might have a negative impact on the work of a system, the efficiency of extracting energy as well as the economy of the installation. In the paper the differences in heat capacities and temperatures of fluid taking heat from the gtound were analysed. It was proved that it is possible to assume a constant mean temperature of the ground with the sufficient accuracy (for the ground heat exchangers located at the depth of 200 m). This assumption considerably simplifies the calculations. The calculations of the ground heat exchangers made according to the computational model worked out by the author allowed him to compare the results with those obtained from the previously used mathematical models, which did not take into account the heat exchange inside a heat exchanger. The comparisons were done both in quantity and in quality. The pumps co-operating with vertical ground heat exchangers applied for winning the ground energy used for heating in house building needs accurate choice of parameters of the pump (its capacity) and calculation of the length of a heat exchanger for given type of the ground. Substantial simplifications in computational models, have been used so far at designing stage of the installation, might be a cause of some errors which might have a negative impact on the work of a system, the efficiency of extracting energy as well as the economy of the installation. In the paper the differences in heat capacities and temperatures of fluid taking heat from the gtound were analysed. It was proved that it is possible to assume a constant mean temperature of the ground with the sufficient accuracy (for the ground heat exchangers located at the depth of 200 m). This assumption considerably simplifies the calculations. The calculations of the ground heat exchangers made according to the computational model worked out by the author allowed him to compare the results with those obtained from the previously used mathematical models, which did not take into account the heat exchange inside a heat exchanger. The comparisons were done both in quantity and in quality.

Słowa kluczowe

PL

pompa ciepła; energia gruntu; wymiennik ciepła gruntowy

EN

heat pump; ground energy; ground heat exchangers

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems : journal of transdisciplinary systems science
• Rocznik: 2004
• Tom: Vol. 9, Sp. 2/1
• Strony: 527--534
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Kujawa T.

• Katedra Techniki Cieplnej, Politechnika Szczecińska

Bibliografia

• [1] KUJAWA T., The exploitation of the ground as a source of heat for dwelling-houses using vertical ground heat exchangers, PhD Dissertations, Szczecin 2003 (in Polish).
• [2] BOSE J.E. et al., Earth-Coupled and solar-assisted heat pump systems, 5 th Annual Heat Pump Technology Conference, Oklahoma State University Stillwater, Oklahoma 1980.
• [3] BOSE J.E., PARKER I.D., McQUISTON EC., Design data manual for closed-loop ground-coupled heat pump systems, Oklahoma State University 1985.
• [4] CETUS. Polskie pompy ciepła, Materiały firmowe SeCeS-Pol, Gdańsk 1998.
• [5] Closed-Loop Geothermal Systems. Slinky Installation Guide, RER Project 86-1, 1994.
• [6] Closed-Loop Ground-Source Heat Pump Systems. Installation Guide, NRECA Research Project 86-1, ISBN 0-929974-01-8.
• [7] GRYGLASZEWSKI L., Pompy ciepła CETUS. Dolne źródła ciepła; SeCeS-Pol 1997
• [8] RUBIK M., Pompy ciepła. Poradnik, Ośrodek Informacji Technika Instalacyjna w Budownictwie, Warszawa 1999.
• [9] GAJEWSKI W. (red.), Ekologiczne aspekty przetwarzania energii: ekspertyza PAN, Wydział IV Nauk Technicznych, KTiS, Warszawa 1996.
• [10] NOWAK W., SOBAŃSKI R., KABAT M., KUJAWA T., Systemy pozyskiwania i wykorzystania energii geotermiczny, Wyd. Politechniki Szczecińskiej, Szczecin 2000.
• [11] GeothermalHeat Pumps. Introductory Guide, RER Project 86-1A, 1997.