Energy Efficient Liquid Desiccant Cooling Systems

Jagannath, K and Sharma , S S and Bhat, Chandrashekhar and Kini, Achutha U and Prabhu, Raghavendra B and Agarwal, Manish (2014) Energy Efficient Liquid Desiccant Cooling Systems. In: 3rd World Conference on Applied Sciences, Engineering and Technology, 27-29 September 2014, Kathmandu, Nepal.

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The refrigeration and air conditioning technology have been passing through a changing phase. The problems of ozone depletion and global warming have created a void in refrigeration and air conditioning industry which have led the refrigeration community to research for alternative refrigerants and alternative cooling technologies. Desiccant cooling systems combine dehumidification, heat recovery, evaporation and heating to create a cooling process which can offer energy savings compared to conventional air conditioning systems. It is one kind of innovative technologies which employs renewable energy to produce the desired air for comfortable working/living spaces. These systems have little dependency on fossil-fuel energy and are environment friendly. Desiccant cooling uses liquid or solid desiccant in order to dehumidify the processed air. By coupling with mechanical cooling, desiccant systems can avoid the need for reheat which is essential in conventional systems. Desiccant cooling has long been adopted for both industrial and agricultural purposes, and is now taking a more and more prominent role in the air-conditioning field. It is economical and has effective humidity control at low and moderate temperatures since it makes full use of surface vapor pressure difference to realize moisture transfer between the process air and liquid desiccant. In the present paper, the heat and mass transfer in the various components of the desiccant system is analyzed and COP of the system is obtained by numerical simulation through theoretical model. The influence of air temperature, relative humidity, air flow rate, desiccant flow rate, desiccant concentration on the cooling capacity and COP of the system is studied. It is observed that when the cooling and heating is replaced by renewable energy, COP is greatly enhanced.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Desiccant, Dehumidifier, Regenerator, Heat exchanger
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 08 Oct 2014 06:32
Last Modified: 08 Oct 2014 06:32

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