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'Development of New Refrigerant for Air-Conditioning System'

Khoo, Ee Fei (2005) 'Development of New Refrigerant for Air-Conditioning System'. Universiti Teknologi Petronas. (Unpublished)

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Ozone depletion and global warming or more accurately climate change are major environmental concerns with serious implications for the future development of the refrigerant based industries. The industry has reacted to reduce ozone depletion but the follow-on consequences of trying to react to the need to reduce the emission of greenhouse gasses. Consequent upon the Montreal Protocol and its adjustments came to measure to reduce the production and use of materials with high ozone depletion potentials. First, the halons were banned, then the chlorofluorocarbons (CFCs) and now there's a push to ban the hydrochlorofluorocarbon (HCFCs) on a time scale which becomes shorter with each new amendments to the protocol. The rush for developing new refrigerant working fluid is at peak now considering the impact on ozone depletion, global warming, economics safety and efficiency. In this study, six potential refrigerant working fluids are investigated based on the enthalpy of solution and the pH using calorimetry method. Sodium chlorate ofmolaltiy 5.637 mol/kg is the most suitable refrigerant for the new air conditioning system using the membrane technology. The l5°C temperature decrement of the solution provides a large driving force for heat transfer from ambient to the endothermic salt solution. Experiment results shows that in a well insulated system, the endothermic salt solution could provide cooling of hot air to l8°C - 20°C for up to 50 minutes. Sodium chlorate is also non-toxic as compared to Freon-22, highly stable and do not corrode copper coils. This eliminates the waste treatment required by Freon-22.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Advance Process Control
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 09:30
Last Modified: 25 Jan 2017 09:46
URI: http://utpedia.utp.edu.my/id/eprint/9049

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