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00000AU309 121903

100 ൩ of air per minute at 20°C and 75% relative humidity is heated until it’s
temperature becomes 30°C. Calculate i) Final RH ii) Heat added in kW.
During the process moisture content is constant.

Define saturated air and relative humidity.

PART C
Answer any four questions, each carries 10 marks.

Explain the vapour compression refrigeration system and represent the system in
P-H and T-S plots.

Describe the need of flash chamber in vapour compression system.

Explain a) Diaphragm pressure sensor b) Bimetallic temperature sensor

Explain with line diagram the closed loop control system.

Explain the Winter air conditioning system with diagram.

Discuss the effects of sub cooling of refrigerant on the performance of vapour
compression system.

Describe heat produced in human body and its dissipation.

Explain the factors affecting human comfort and comfort chart.

Compare vapour compression refrigeration system and vapour absorption
refrigeration system.

Explain with line diagram the temperature control system in automobiles.
Describe the factors to be considered in the design of comfort air conditioning.

Describe the temperature control system of an air conditioning system.

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