Volume No. 8 Issue No.: 2 Page No.: 335-341 Oct -Dec 2013

 

RESOURCE CONSERVATION THROUGH THERMAL DESIGN OF EVAPORATIVE CONDENSERS

 

Shah D. Parin* and Sahajpal Shreya

Department of Chemical Engineering, Institute of Technology, Nirma University, Ahmedabad, Gujarat (INDIA)

 

Received on : August 05, 2013

 

ABSTRACT

 

Condensers are an integral part of our industries. Condensers are used in industrial chemical processes, refrigeration, air conditioning, power plants and other heat-exchange systems. Cooling water or surrounding air is generally used as a cooling medium in most industries. Water-cooled condensers are the most widely used condensers in the industries. But, water is a natural and depleting resource and has become a scarce commodity in many areas. Considering the conservation of natural resources like water, evaporative condensers may prove to be beneficial. Evaporative condensers consume very less water, about 5% of an equivalent water cooled condenser and can be considered as an attractive alternative in areas where water availability is a problem. An evaporative condenser uses a system of tubes which is exposed to a constant spray of water and fan-facilitated air flow to cool and condense hot refrigerant vapours. In this type of condenser, both air and water are used as a cooling medium. This paper highlights the fundamental principle and working of evaporative condensers. This paper discusses about advantages and disadvantages of evaporative condensers. A case study has also been discussed and detailed design calculations have been carried out manually. Rating of evaporative condenser has also been carried out.

 

Keywords : Evaporative condensers, Ammonia, Thermal design, Resource conservation, Cooling water

 

 

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