Why is the vapor absorption refrigeration cycle called a heat operated cycle? Discuss the working principle of vapor absorption refrigeration.
How does heat exchanger help to improve performance of vapor absorption cycle.
A refrigeration system working on Bell-Coleman cycle receives air from cold chamber at 5°C and compresses it from 1 bar to 4.5 bar. The compressed air is cooled to a temperature of 37°C before it is expanded in the expander. Calculate the COP of the system when compression and expansion are i) isentropic and ii) PV1.25=ConstantPV^{1.25} = \text{Constant}PV1.25=Constant.
Briefly describe the aqua-ammonia absorption refrigeration cycle.
Dry air at 17°C and 1 bar is to be liquefied by the simple Linde method. The air is compressed isothermally at 17°C to 200 bar. The make-up air is supplied to the system also at 17°C and 1 bar. Find the yield of liquid air in kg per kg of air compressed and the temperature of air before throttling.