A Clean Environment Essay

5673 WordsJan 19, 201323 Pages
------------------------------------------------- Heat exchanger From Wikipedia, the free encyclopedia An interchangeable plate heat exchanger Tubular heat exchanger. A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact.[1] They are widely used in space heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, natural gas processing, and sewage treatment. The classic example of a heat exchanger is found in aninternal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils andair flows past the coils, which cools the coolant and heats the incoming air. Contents [hide] * 1 Flow arrangement * 2 Types of heat exchangers * 2.1 Shell and tube heat exchanger * 2.2 Plate heat exchanger * 2.3 Plate & shell heat exchanger * 2.4 Adiabatic wheel heat exchanger * 2.5 Plate fin heat exchanger * 2.6 Pillow plate heat exchanger * 2.7 Fluid heat exchangers * 2.8 Waste heat recovery units * 2.9 Dynamic scraped surface heat exchanger * 2.10 Phase-change heat exchangers * 3 Direct contact heat exchangers * 4 HVAC air coils * 5 Spiral heat exchangers * 5.1 Construction * 5.2 Self cleaning * 5.3 Flow arrangements * 5.4 Applications * 6 Selection * 7 Monitoring and maintenance * 7.1 Fouling * 7.2 Maintenance * 8 In nature * 8.1 Humans * 8.2 Birds, fish, marine mammals * 8.3 Carotid rete * 9 In industry * 10 In aircraft * 11 A model of a simple heat exchanger * 12 See also * 13 References * 14 External links | ------------------------------------------------- [edit]Flow arrangement Countercurrent (A) and
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