Air Cond: Past Year Final Exam Question

Past year Refrigeration & Air Conditioning Final Exam Question. This Question included the following topics:

1. Air Conditioning Basic Cycle
a. T-s & P-h diagram
b. Using R-134a or R-12 table to find value of enthalpy h.
c. Find the work of compressor and refrigerating effect.

2. Sling psychrometer to find the value of the dry bulb and wet bulb with the specific value of
atmospheric pressure. This question want you to evaluate:
a. Partial Pressure
i. Water Vapor
ii. Dry air
b. Relative humidity
c. Humidity ratio
d. Specific enthalpy

3. Room design question. Using Psychrometric Chart to evaluate the value of
a. Outdoor air mass flowrate
b. Supply air
i. Dry bulb temperature
ii. Mass flowrate
c. mix air
i. Dry bulb temperature
ii. relative humudity
d. cooling coil load

4. Ducting design. To approximate tho total pressure drop inside the ducting.

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