H. R., Ramji and M. O., Abdullah and I.A. W., Tan and S. L., Leo (2014) Comparative Study of Three Different Adsorbent-Adsorbate Working Pairs for a Waste Heat driven adsorption air conditioning system based on Simulation. IJRRAS, 18 (2). pp. 109-121. ISSN 2348 – 3997
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Abstract
In a previous study, a laboratory prototype of a thermal-driven adsorption air conditioning system employing activated carbon as adsorbent and methanol as the refrigerant was successfully developed. The experimental results employing the prototype obtained a COP of 0.19 and cooling capacity Q of around 320 kJ. The cooling power P yielded ~ 0.64 kW and it was able to produce chilled air temperature Tchill,out of around 22 °C. In the present study, further works are conducted via simulation to carry out “what-if” analysis viz. to determine the optimal adsorbent-adsorbate working pair based on the prototype. Three types of refrigerants, coupled with activated carbon, were considered in this study, namely (1) methanol (similar to the experimental works); (2) ammonia; and (3) water. The simulation results obtained showed that activated carbon-water pair produced the best cooling compared to activated carbon-methanol and activated carbon-ammonia working pairs, as far as present study is concerned. The methanol and ammonia showed a COP of 0.37 and 0.4, respectively. The average Tchill,out produced by methanol was around 15 °C while the temperature produced by ammonia was slightly higher around 19 °C. The cooling capacity P for methanol and ammonia showed a value of 0.65 kW and 0.50 kW, respectively. Activated carbon-water pair simulated to yield a higher COP of 0.58 with Q at 480 kJ mainly due to high heat of evaporation, which was able to produce average Tchill,out of 12 °C with cooling power of approximately 1 kW.
| Item Type: | Article |
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| Uncontrolled Keywords: | Adsorption air conditioning system; Activated carbon; COP; Cooling power; Simulation; Waste heat,unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak |
| Subjects: | Q Science > Q Science (General) T Technology > T Technology (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Academic Faculties, Institutes and Centres > Faculty of Engineering Faculties, Institutes, Centres > Faculty of Engineering |
| Depositing User: | Karen Kornalius |
| Date Deposited: | 12 Nov 2015 06:50 |
| Last Modified: | 17 Nov 2015 07:17 |
| URI: | http://ir.unimas.my/id/eprint/9724 |
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