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Title: Experimental and Theoretical Studies on Adsorption Chillers Driven by Waste Heat and Propane
Keywords: adsorption, refrigeration, thermodynamics
Issue Date: 27-Dec-2013
Source: AZHAR BIN ISMAIL (2013-12-27). Experimental and Theoretical Studies on Adsorption Chillers Driven by Waste Heat and Propane. ScholarBank@NUS Repository.
Abstract: The increasing concerns related to the environment have brought about escalating interests in heat sorption systems for cooling applications. This thesis investigates the utilization of adsorbent + adsorbate pairs in the moderate pressure ranges. A theoretical framework for the study of the pressurized adsorption chiller is developed incorporating statistical mechanics considerations. Adsorption pairs, specifically that of activated carbon (AC) with propane, n-butane, HFC-134a, R507a and R-32 are then analyzed to compare their cooling capacities from their equilibria characteristics. It was found that propane is the most feasible option when the ambient temperature is high and the cooling temperature is low. Furthermore, hydrocarbons are naturally available with a low ozone depleting potential (ODP) and global warming potential (GWP). Time-dependent kinetics characteristics between AC and propane are then collected and analyzed. Finally, the adsorption chiller is modeled incorporating pressure equalization effects and verified experimentally with a fabricated batch operated single-staged adsorption chiller. This model which fits the experimental data very well could be used to describe any working adsorption pair for further studies.
Appears in Collections:Ph.D Theses (Open)

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