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What is heat Transfer and Heat Exchangers

 HEAT EXCHANGERS 

What is heat Transfer:-

Heat Transfer  is the transition of thermal energy from a hotter object to a cooler  object.

Heat Transfer done from a hot or warm area to a cold medium in 3 ways:

By radiation from a warm surface to a cooler surface through air space 

By conduction through solisolid or fluid materials 

By convection which involves the physical  movement of air 


Basics for heat Transfer are:-

Difference in temperature between the hot and cold  fluids, greater the difference-higher the rate at which the heat will flow between them.

area of the conductive barrier provided for heat flow. The greater the area, the larger the amount of  heat that will flow in a given time with a given temperature difference.

rate of heat flow into,or,out, from each of the fluids. High high resistance to heat flow in either fluid will produce a slow overall rate of Transfer.

flow of heat through the conductive barrier between fluids. Material chosen has to be compatible with the fluids of the process, it most not corrode or contaminate the fluids. 


What is Heat Exchangers:-

A heat exchanger is a device which allows Transfer of heat energy from one fluid to another fluid,generally without mixing the two different fluid. Regardless of the operate that a device fulfills,to Transfer heat,the fluids concerned should be at totally different temperatures and that they should acquire thermal contact, since heat will flow only from the hot to the cool liquid. 


A heat exchanger can serve any of the following purposes.

1.  To heat a cooler fluid by means of a hotter fluid 

2.  To reduce the temperature of a hot fluid by means of a cooler fluid 

3.  To boil liquid by means of a hotter fluid 

4.  To condense a gaseous fluid by means of a cooler fluid 

5.  To boil a liquid while condensing a hotter gaseous fluid 

Heat Transfer in a heat Exchangers is calculated by the following formula:-


Q= m× Cp × dT


Where,

          Q= Heat transfer 

         m= mass flow rate of fluid 

        Cp= Specific Heat of the fluid 

        dT= Temperature difference between                  Inlet and outlet of the fluid 

         




















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Comments

  1. EasywayDecember 20, 2020 at 10:48 PM

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    ReplyDelete
  2. Chris DavisMarch 25, 2021 at 6:09 AM

    Thanks for sharing such great information about heating systems. It is an important part of our home. Getting heating services in Wyoming is important if the heating unit is having some issues.

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  3. SENHO MACHINERY (SHENZHEN) CO., LTD.June 24, 2021 at 10:40 PM

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    ReplyDelete
  4. Klee's Climate ControlOctober 27, 2021 at 3:21 AM

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    ReplyDelete
  5. Johnson Refrigeration Inc.December 15, 2021 at 1:16 AM

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    ReplyDelete
  6. Air-O ServiceFebruary 2, 2022 at 9:44 PM

    Thanks for sharing such great information about heating systems. It is an important part of our home. Getting heating service in Redding, CAis important if the heating unit is having some issues.

    ReplyDelete

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