Modelling and simulation of air-conditioning cycles
| Autor: | Kazuya Minakuchi, Hisae Takeuchi, Tatsuya Hasegawa, Katsunori Murayama, Yoshinori Kadono, Sandi Rais |
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| Rok vydání: | 2016 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science business.industry 020209 energy Thermodynamics 02 engineering and technology Mechanics Coefficient of performance Condensed Matter Physics Cooling capacity Thermal expansion valve Air conditioning High pressure 0202 electrical engineering electronic engineering information engineering business |
| Zdroj: | Heat and Mass Transfer. 53:425-438 |
| ISSN: | 1432-1181 0947-7411 |
| Popis: | The heat-pump cycle for air conditioning was investigated both numerically and experimentally by evaluating the coefficient of performance (COP) under Japanese Industrial Standard (JIS B 8619:1999) and ANSI/AHRI standard 750-2007 operating conditions. We used two expansion valve coefficients $$Cv_{(\varphi )} = 0.12$$ for standard operating conditions (Case 1) approaching 1.3 MPa at high pressure and 0.2 MPa at low pressure, and $$Cv_{(\varphi )} = 0.06$$ namely poor operating conditions (Case 2). To improve the performance of the air conditioner, we compared the performance for two outside air temperatures, 35 and 40 °C (Case 3). The simulation and experiment comparison resulted the decreasing of the COP for standard operating condition is equal to 14 %, from 3.47 to 2.95 and a decrease of the cooling capacity is equal to 18 %, from 309.72 to 253.53 W. This result was also occurred in poor operating condition which the COP was superior at 35 °C temperature. |
| Databáze: | OpenAIRE |
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