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Title: Study of thermal chiller under tropical climate conditions
Authors: Loh, Marcus Hong Wah
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2019
Abstract: Researchers and scientist have widely studied adsorbent materials for various use. Usage includes storage of gases, purification media in wastewater treatment, and cooling applications. This report focuses on metal-organic-framework-801 (MOF-801) with added Methyl functional group, ( -CH3) for adsorption chiller applications. The experimental results first present the characterization of (CH3)2 – MOF – 801, followed by simulation results of a two bed adsorption chiller through inputting the experimentally confirmed adsorption isotherms and kinetics data. The experimental results showed improved adsorption kinetics over the parent MOF-801, and this marked an improve in performance in adsorption chiller application. The numerical simulation based on the experimentally confirmed adsorption isotherms and kinetics yielded a 31.1% increase in COP and 48% percent increase in COP at a low hot water temperature of 60°C. The numerical modelling of a 2-bed adsorption chiller yielded a chill water output of 12°c with hot water temperature of 60°C , cooling water of 30°C, with cycle time of 850s and switch time of 30s. From the simulation study, it is concluded that (CH3)2 – MOF – 801 shows promising results in terms of specific cooling capacity (0.45 kW/kg) and coefficient of performance (≈0.5) which are higher than those of silica-gel-water / zeolite-water systems. The learning outcome of this project includes the synthetization of MOF, understanding of adsorption isotherms and kinetics, working principles of adsorption-desorption chiller, as well as the dynamic behaviour of an adsorption-desorption chiller due to influencing parameters.
Schools: School of Mechanical and Aerospace Engineering 
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MAE Student Reports (FYP/IA/PA/PI)

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