For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?

Byadmin January 25, 2019August 16, 2021

For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?

A. small
B. high
C. euqal
D. anything
E. under some conditions small and under some conditions high

Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a lithium bromide absorption refrigeration system

Question: In a lithium bromide absorption refrigeration system
[A].

lithium bromide is used as a refrigerant and water as an absorbent
[B].
water is used as a refrigerant and lithium bromide as an absorbent
[C].
ammonia is used as a refrigerant and lithium bromide as an absorbent
[D].
none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Read More In a lithium bromide absorption refrigeration system
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

In a vapour compression refrigeration system, a throttle valve is used in place of an expander because

Question: In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
[A].

it considerably reduces mass of the system
[B].
it improves the C.O.P., as the condenser is small
[C].
the positive work in isentropic expansion of liquid is very small
[D].
it leads to significant cost reduction

Answer: Option C

Explanation:

No answer description available for this question.

Read More In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
Refrigeration and Air Conditioning

Which of the following is not a desirable property of a refrigerant_________________?

Which of the following is not a desirable property of a refrigerant_________________?

A. high triiscibility with oil
B. low boiling point
C. good electrical conductor
D. large latent heat
E. non-inflammable

Read More Which of the following is not a desirable property of a refrigerant_________________?
Refrigeration and Air Conditioning

A refrigerant should have _____________________?

A refrigerant should have _____________________?

Pick up the wrong statement ?
A. Tow specific heat of liquid
B. high boiling point
C. high latent heat of vaporisation
D. higher critical temperature
E. low specific volume of vapour

Read More A refrigerant should have _____________________?
Heat Transfer | Mechanical Engineering | Refrigeration and Air Conditioning

Bell-Coleman cycle is a

Question: Bell-Coleman cycle is a
[A].

reversed Carnot cycle
[B].
reversed Otto cycle
[C].
reversed Joule cycle
[D].
reversed Rankine cycle

Answer: Option C

Explanation:

No answer description available for this question.

Read More Bell-Coleman cycle is a
Refrigeration and Air Conditioning

Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of___________________?

Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of___________________?

A. 1 : 1
B. 1 : 9
C. 9 : 1
D. 1 : 3
E. 3 : 1

Read More Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of___________________?

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