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doi: 10.3850/978-981-08-7614-2_IMPRES044
Performance Investigation of Low GWP Refrigerant based Adsorption Cooling Cycle
Skander Jribi1, Bidyut B. Saha2, Yutaro Terao1, Anutosh Chakraborty3 and Shigeru Koyama1
1Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816-8580, Japan
2Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan.
saha@mech.kyushu-u.ac.jp
3School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
ABSTRACT
Adsorption isotherms of HydroFluoroOlefin namely R1234ze onto activated carbon (AC) of type Maxsorb III have been experimentally investigated by a volumetric apparatus. The uptakes were measured for the temperatures of 10, 30, 50 and 70°C and pressures up to 10 bars. The experimental data were fitted with Tóth and Dubinin-Astakhov (D-A) isotherm equations, and the isosteric heats of adsorption were calculated from the rigor of Clausius-Clapeyron relation. The dynamic behavior of 4-bed adsorption chiller is analyzed, where Maxsorb III-R1234ze is used as the adsorbent-refrigerant pair, and the simulated results in terms of various component temperatures, cycle average cooling capacity and coefficient of performance (COP) are obtained numerically. With 80 kg of Maxsorb III, the system is able to produce 3 kW of cooling power at driving heat source temperature of 80°C. This environment friendly adsorption system could be driven by waste heat of the internal combustion engine and is suitable for automotive air-conditioning.
Keywords: Adsorption, Isotherm, Activated carbon, Transient mathematical model, Cooling cycle, Performance.
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