Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 1 (Q.No. 5)
5.
In a refrigerating machine, heat rejected is __________ heat absorbed.
Discussion:
17 comments Page 2 of 2.
Raju said:
8 years ago
Answer is C because heat is rejected always at higher temperatures that's why we require the more work to reject temp.
(1)
Vishal said:
8 years ago
Always energy is released higher form to lower form.
Sanjeeva said:
7 years ago
The refrigerant available in the form of vapour. If there is no heat rejection is does not takes place in condenser the vapour does not produce any refrigeration effect. That's why we reject the heat more than absorption.
Naeem said:
7 years ago
Here the work done can't be a negative value in COP formula, i.e. if Qh-QL is -ve value then COP= -ve value, which is not possible.
(1)
Rahul M said:
6 years ago
Heat rejected from a refrigerator is always greater than heat absorption, because of not only the heat from the substance but also the heat generated during the working of the compressor.
(1)
Huma said:
6 years ago
Because the heat rejected also contains the miscellaneous heat that is produced by the refrigerators part, along with the heat absorbed.
(1)
Dhaval said:
4 years ago
Heat absorbed + Work done in it = heat rejected.
(2)
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