Classification of heat exchanger

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1. TOPIC:-CLASSIFICATION OF HEAT EXCHANGER SUBJECT :- HEAT TRANSFER(2151909 ) 150183119010-SONU S GUPTA 150183119012- DIGVIJAY JADAV 150183119013- PRADEEP JADAV 150183119028- VIVEK SHAH 150183119042- DEEPAK YADAV MECHANICAL 5 SEM B BATCH GOVERNMENT ENGONEERING COLLEGE DAHOD

2. CONTENT what is heat exchanger? classification of heat exchanger. direct contact heat exchanger regenerative heat exchanger recuperative type heat exchanger parallel flow type heat exchanger counter flow type heat exchanger shell and tube type heat exchanger Evaporator condenser

3. WHAT IS HEAT EXCHANGER? A  heat exchanger  is a device used to transfer heat between one or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.

4. CLASSIFICATION OF HEAT EXCHANGER. 1. Nature of heat exchange process: 2. Relative direction of motion of fluids: 3. Mechanical design of heat exchanger surface: Concentric tubes Shell and tube Multiple shell and tube passes 4. Physical state of heat exchanging: Condenser Evaporator  

5. DIRECT CONTACT HEAT EXCHANGER This is done by complete physical mixing of heat and mass transfer. Examples are water cooling towers and jet condensers in steam power plants.

6. Regenerative heat exchanger A  regenerative heat exchanger , or more commonly a  regenerator , is a type of heat exchanger where heat from the hot fluid is intermittently stored in a thermal storage medium before it is transferred to the cold fluid. To accomplish this the hot fluid is brought into contact with the heat storage medium, then the fluid is displaced with the cold fluid, which absorbs the head

7. RECUPERATIVE TYPE HEAT EXCHANGER recuperate  is a special purpose  counter-flow   energy recovery   heat exchanger  positioned within the supply and exhaust air streams of an air handling system, or in the exhaust gases of an industrial process, in order to recover the  waste heat . The image, right, shows the three major configurations

8. PARALLEL FLOW TYPE HEAT ECHANGER These   exchangers  are composed of many thin, slightly separated plates that have very large surface areas and small fluid  flow  passages for  heat transfer . ... Another difference between the two is that plate  exchangers typically serve low to medium pressure fluids, compared to medium and high pressures of shell and tube

9. COUNTER FLOW TYPE HEAT EXCHANGER Counter  heat current exchange: Note the gradually declining differential and that the once hot and cold streams exit at the reversed temperature difference; the hotter entering stream becomes the exiting cooler stream and vice versa. Counter current exchange is a mechanism occurring in nature and mimicked in industry and .... A concurrent   heat exchanger  is an example of a concurrent   flow exchange  ...

10. SHELL AND TUBE TYPE HEA T EXCHANGER As its name implies, this  type  of  heat exchanger consists of a  shell  (a large pressure vessel) with a bundle of  tubes  inside it. One fluid runs through the tubes, and another fluid flows over the  tubes  (through the  shell ) to  transfer heat  between the two fluid

11. EVOPARATOR An  evaporator  is a device used to turn the liquid form of a chemical into its gaseous form. The liquid is evaporated, or vaporized, into a gas.

12. CONDENSER In systems involving heat transfer, a  condenser  is a device or unit used to condense a substance from its gaseous to its liquid state, by cooling it.

13. REFERENCE https://en.wikipedia.org/wiki/Heat_exchanger http://pimg.tradeindia.com/00198810/b/0/Heat-Exchanger.jpg http://www.thermopedia.com/content/5254/548HEFig5.gif http://me-mechanicalengineering.com/heat-exchangers-classification/ http://naturalgasefficiency.org/files/2016/01/WaterHtrSOFAME.jpg https://en.wikipedia.org/wiki/Regenerative_heat_exchanger

14. REFERENCE https://media.licdn.com/mpr/mpr/AAEAAQAAAAAAAAgXAAAAJGM3ODFkMzljLWJlMDYtNDIxYi04ZjQ5LWEyYmQ0M2JmN2YzMg.jpg https:// en.wikipedia.org/wiki/Recuperator https:// en.wikipedia.org/wiki/Shell_and_tube_heat_exchanger https://www.google.co.in/search?newwindow=1&safe=active&q=SHELL+AND+TUBE+TYPE+HEA+T+EXCHANGER+WIKI&oq=SHELL+AND+TUBE+TYPE+HEA+T+EXCHANGER+WIKI&gs_l=serp.3...2306.3907.0.4953.5.5.0.0.0.0.0.0..0.0....0...1c.1.64.serp.. 5.0.0.uysk9Kb_5uc

15. REFERENCE https:// en.wikipedia.org/wiki/Evaporator4