HEAT TRANSFER - Heat Exchanger

Heat Exchanger

         Heat exchangers are devices built for efficient heat transfer from one fluid to another and are widely used in engineering processes. There are many types of heat exchanger such as double pipe heat exchanger and shell & tube heat exchanger and act. They are widely used in space heating, refrigeration, air conditioning,power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. 

         Shell and tube heat exchangers - consist of a series of tubes. One set of these tubes contains the fluid that must be either heated or cooled. The second http://1bornean.blogspot.com/ fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required. A set of tubes is called the tube bundle and can be made up of several types of tubes.

Shell & Tube Heat Exchanger

         Double pipe heat exchanger - simplest form is just one pipe inside another larger pipe. One fluid flows through the inside pipe and the other flows through the annulus between the two pipes. The wall of the inner pipe is the heat transfer surface.

References:

http://www.taftan.com/thermodynamics/EXCHANGE.HTM

http://www.hed-inc.com/shell-tube.html

http://www.brighthub.com/engineering/mechanical/articles/64548.aspx