THERMAL ENGINEERING LAB ASSESSMENT $-$ S$2$

Q$1.$ A standard vapor compression refrigeration cycle consists of the following thermodynamic processes excluding:

A$.$ Isobaric heat addition

B$.$ Isentropic compression

C$.$ Isobaric heat rejection Isentropic expansion

Q$2.$ In a vapor compression refrigeration system, at exit from which component the working fluid is high pressure liquid?

A$.$ Evaporator

$($B$.$ Condenser

C$.$ Compressor

D$.$ Expansion valve

Q$3.$ Explain the working principle each component in the vapor compression refrigeration cycle and mention the processes involved in it$.$

Q$4.$ In a simple vapor compression refrigeration system, mass flow rate of the refrigerant is $0\mathrm{.}1k\frac{g}{s}.$ The enthalpy values at inlet of compressor, at exit from the compressor, and at exit from the condenser are $183,209$ and $74k\frac{J}{k}g$ respectively. Estimate: $($i$)$ The C$.$O$.$P $($ii$)$ The power required to drive the compressor, and $(1i{i}^1)$ The rate of heat rejection from the condenser.

Q$5.$ How to select a good refrigerant in a refrigeration system. List any $4$ refrigerants.