Temat: geothermal heating - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Exergy analysis of the performance of low-temperature district heating system with geothermal heat pump
Autorzy:: Sekret, R.
Nitkiewicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/240813.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: exergy analysis
low-temperature geothermal water
district heating system
analiza egzergii
niskotemperaturowa woda geotermalna
ciepłownictwo systemowe
Opis:: 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.
Źródło:: Archives of Thermodynamics; 2014, 35, 1; 77-86
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Thermal performance evaluation of an earth-to-air heat exchanger for the heating mode applications using an experimental test rig
Autorzy:: Ahmad, Saif Nawaz
Prakash, Om
Powiązania:: https://bibliotekanauki.pl/articles/2091363.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heat transfer
earth-to-air heat exchanger
ground heat exchanger
geothermal energy
renewable energy
assive heating
assive cooling
effectiveness
Opis:: This paper presents the experimental investigation of an earth-to-air heat exchanger for heating purposes in the Patna region of India, using an experimental test rig. In the view of the author, real field experiments have several limitations such as lack of repeatability and uncontrolled conditions. It also takes more time for the response of parameters that depends on nature and climate. Moreover, earth-to-air heat exchangers may be expensive to fabricate and require more land area. Thus, in this work authors executed their experimental work in indoor controllable environments to investigate the thermal performance of an earth-to-air heat exchanger. The actual soil conditions were created and maintained the temperature at 26°C throughout the soil in the vicinity of pipes. Three horizontal PVC pipes of equal lengths and diameters of 0.0285 m, 0.038 m and 0.0485 m were installed in the test rig. The experiments were performed for different inlet air velocities at ambient air temperature. This study acknowledges that the maximum rise in outlet temperature occurs at a lower speed for smaller pipes. Also, the maximum effectiveness of 0.83 was observed at 2 m/s for the smallest diameter pipe.
Źródło:: Archives of Thermodynamics; 2022, 43, 1; 185--207
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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