Modelling and simulation of air-conditioning cycles

Modelling and simulation of air-conditioning cycles

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 C v ( φ...

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Bibliographic Details
Published in:Heat and mass transfer Vol. 53; no. 2; pp. 425 - 438
Main Authors: Rais, Sandi, Kadono, Yoshinori, Murayama, Katsunori, Minakuchi, Kazuya, Takeuchi, Hisae, Hasegawa, Tatsuya
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-02-2017
Springer Nature B.V
Subjects:
Air conditioners
Air conditioning
Air temperature
Computer simulation
Engineering
Engineering Thermodynamics
Gas expanders
Heat and Mass Transfer
Industrial Chemistry/Chemical Engineering
Low pressure
Mathematical models
Original
Performance enhancement
Repair & maintenance
Thermal expansion
Thermodynamics
Polytropic Index
Expansion Valve
Poor Operating Condition
Heat Pump
Standard Operating Condition
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Summary: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 C v ( φ ) = 0.12 for standard operating conditions (Case 1) approaching 1.3 MPa at high pressure and 0.2 MPa at low pressure, and C v ( φ ) = 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.
ISSN:0947-7411
1432-1181
DOI:10.1007/s00231-016-1826-1