Exergy analysis of the performance of low-temperature district heating system with geothermal heat pump

• Autorzy: Sekret R. , Nitkiewicz A.

Identyfikatory

DOI

10.2478/aoter-2014-0005

• Języki publikacji: EN

Abstrakty

EN

Exergy analysis of low temperature geothermal heat plant with compressor and absorption heat pump was carried out. In these two concepts heat pumps are using geothermal water at 19.5°C with spontaneous outflow 24 m³/h as a heat source. The research compares exergy efficiency and exergy destruction of considered systems and its components as well. For the purpose of analysis, the heating system was divided into five components: geothermal heat exchanger, heat pump, heat distribution, heat exchanger and electricity production and transportation. For considered systems the primary exergy consumption from renewable and non-renewable sources was estimated. The analysis was carried out for heat network temperature at 50/40°C, and the quality regulation was assumed. The results of exergy analysis of the system with electrical and absorption heat pump show that exergy destruction during the whole heating season is lower for the system with electrical heat pump. The exergy efficiencies of total system are 12.8% and 11.2% for the system with electrical heat pump and absorption heat pump, respectively.

Słowa kluczowe

EN

exergy analysis; low-temperature geothermal water; district heating system

PL

analiza egzergii; niskotemperaturowa woda geotermalna; ciepłownictwo systemowe

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2014
• Tom: Vol. 35, no. 1
• Strony: 77--86
• Opis fizyczny: Bibliogr. 9 poz., il.

Twórcy

autor

Sekret R.

• Czestochowa University of Technology, Faculty of Environmental Engineering and Biotechnology, Brzeźnicka 60a, 42-200 Częstochowa, Poland

autor

Nitkiewicz A.

• Czestochowa University of Technology, Faculty of Environmental Engineering and Biotechnology, Brzeźnicka 60a, 42-200 Częstochowa, Poland

Bibliografia

• [1] Górecki W.: Atlas of Geothermal Resources of Mesozoic Formation in the Polish Lowlands. Publisher: Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Kraków 2006.
• [2] Kępińska B.: Current geothermal activities and prospects in Poland — An overview. Geothermics 32(2003), 397–407.
• [3] Szargut J.: Exergy. Wydawnictwo Politechniki Śląskiej, Gliwice 2007.
• [4] Ozgener L., Hepbasli A., Dincer I.: Energy and exergy analysis of geothermal district heating systems: an application. Build. Environ 40(2005), 1309–1322.
• [5] Dincer I., Rosen M.A.: Exergy. Energy, Environmental and Sustainable Development. Elsevier 2007.
• [6] Borsukiewicz-Gozdur A.: Exergy analysis of internal regeneration in supercritical cycles of ORC power plant. Arch. Thermodyn. 33(2012), 3, 51–63.
• [7] Budnik M., Stanek W.: Exergetic cost of steam power plant operation. Arch. Thermodyn. 32(2011), 2, 39–54.
• [8] Nitkiewicz A., Sekret R.: Exergy Analysis of Low-Temperature Geothermal District Heating System. Modern solutions in Environmental Engineering and Protecion, Vol. II. Wrocław 2010.
• [9] Typical meteorological years and statistic climatic database for Poland region. Publisher: Ministry of Transport, Construction and Maritime Economy webside: https://www.transport.gov.pl/2-48203f1e24e2f-1787735-p-1.htm, 09.09.2013.

Uwagi

EN

This paper is an effect of scientific research realized by financial means for science in the years 2009–2012. Project No. N N513 359 637.