#227 What are some of the principal irreversibilities present

What are some of the principal irreversibilities present - Mechanical Engineering

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Free Chegg Question

What are some of the principal irreversibilities present during the ation of

(a) an automobile engine,

(b) a household refrigerator,

(c) a gas-fired water heater,

(d) an electric water heater?

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Free Chegg Answer

Principal irreversibilities-

(a) Automobile Engine-

1.mechanical friction between moving parts

2.wear and corrosion

3.heat transfer across finite temperature differences

4.chemical reactions

(b) Household Refrigerator

1.isenthalpic throttling

2.Fluid friction

3.heat transfer to and from the surroundings.

(c) Gas fired water heater

1.heat interaction with surroundings

2.combustion

(d) Electric water heater

1.electrical resistance

2.copper losses