Development Of Indirect Multi-Split Air-Conditioning System Using Propylene Glycol As Secondary Refrigerant

Murat, Mohamad Faisal (2017) Development Of Indirect Multi-Split Air-Conditioning System Using Propylene Glycol As Secondary Refrigerant. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays,the mechanical vapour compression system used for this purpose use large amount of electrical power that is produced in great proportion by fossil fuel combustion which is cause of the global warming.So improvement of performance of the system is important to increase refrigerating effect or to improve performance of vapour compression refrigeration system.Any substance must be wisely evaluated for the global impact on the global environment.The interest in application of secondary refrigerant system in air conditioning and refrigeration is to reduce refrigerant losses and the chance for lower installation and operation costs. Developed indirect air conditioning system using 1HP,R-22 as primary refrigerant.Indirect air conditioning system using the propylene glycol as a secondary refrigerant and the ratio for secondary refrigerant was mixture with 1 litre water and 1, 1.5, 2, 2.5 and 3 litre of glycol accordingly.The data have be taken used the thermocouples type-K in this experiment is cooling coil temperature difference of direct and indirect refrigeration system and COP performance of direct and indirect refrigeration system plot at the mollier chart.The average for increment of coefficient of performance (COP) 1 HP multi-split unit air-conditioner with usage of propylene glycol as a secondary refrigerant is 33.38%.The prototype of multi-split air conditioning with propylene glycol in this project increased the COP of the air-conditioner system in between 13.64% - 59.38% and the results indicate that propylene glycol is also the ideal fluid to be used as a secondary refrigerant at the air conditioning system.The maximum temperature achieve from this project was 6°C and the air-conditioning able to produce thermal comfort temperature for occupants which are 22°C - 24°C.

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