Regenrative Air Cooling System

Published by skhattar36@gmail.com on

Regenerative air cooling system is an adjustment of the air cooling system with the expansion of the regenerative heat exchanger. The high-temperature air from the principle compressor is first cooled by the ram air in the heat exchanger. This air is additionally cooled in the regenerative heat exchanger. The cooling turbine cools the segment of air after expansion. 

Regenrative Air cooling system

Regenerative Air Cooling System process

1-2  Isentropic ramming of the surrounding air from pressure P1 and temperature T1 to pressure P2 and temperature T2.

1-2′ represents actual ramming of air because of internal friction due to irreversibilities.

2-3′ speaks to isentropic pressure in air in the principle compressor.

2-3′ represents actual compression of air because of internal friction due to irreversibilities.

3′-4 represents cooling of compressed air by ram air in the heat exchanger.

4-5 represents cooling of air in the regenerative heat exchanger.

5-6 represents the isentropic expansion of air in the cooling turbine up to the cabin pressure.

5-6′ represents the actual expansion of air in the cooling turbine.

6′-7 represents heating of air up to the cabin temperature T7.

Regenrative air coolin ts

Q tonnes of refrigeration is the cooling load in the cabin, then the quantity of air required for the refrigeration purpose will be

ma = 210Q/ Cp(T7 – T6′)

Unit Kg/min

m1 = Total mass of air bled from the main compressor, and

m2 = Mass of cold air bled from the cooling turbine for regenerative heat exchanger.

For the energy balance of regenerative heat exchanger, we have

m2Cp ( T8 – T6′) = m1Cp ( T4 – T5)

m2 = m1( T4 – T5)/ ( T8 – T6′)

T8 = Temperature of air leaving to atmosphere from the regenerative heat exchanger

 

Power required for the refrigeration system,

P = m1Cp ( T3′ – T2′) / 60 kW

C.O.P of the refrigeration system.

= 210Q / m1Cp (T3′ -T2′ )

= 210Q/ P x 60

Regenerative air cooling system

 

 

 

 


10 Comments

savita chopra · January 29, 2020 at 6:06 pm

very helpful😊

    skhattar36@gmail.com · January 29, 2020 at 6:10 pm

    thankss for your support

Jayant Deep · January 29, 2020 at 6:16 pm

Very informative

    skhattar36@gmail.com · January 31, 2020 at 5:11 pm

    Thanks

Himanshu · January 29, 2020 at 6:32 pm

Nice and very well informative.

    skhattar36@gmail.com · January 31, 2020 at 5:11 pm

    Thanks

Aahana · January 30, 2020 at 7:12 am

Very informative

    skhattar36@gmail.com · January 31, 2020 at 5:10 pm

    thanks

Vinay · January 31, 2020 at 4:35 pm

Wonderful information, thank u so much

    skhattar36@gmail.com · January 31, 2020 at 5:10 pm

    Thanks

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