Topic: Refrigeration and Air Conditioning
The air inside a space capsule is maintained at the required condition by passing it through a set of heat exchangers. The heat exchangers are designed such that the humid air passing through them is cooled and partial condensation of the water vapour occurs. On a psychrometric chart, this process appears as a line which is
- A. Horizontal to the left
- B. Vertical downwards
- C. Diagonal downwards to the left
- D. Diagonal upwards to the right
Answer: C. Diagonal downwards to the left
Explanation: The process described is cooling (which reduces the dry bulb temperature) and dehumidification (which reduces the specific humidity due to partial condensation). On a psychrometric chart, cooling moves left horizontally, and dehumidification moves vertically downwards. Combined, this appears as a line which is diagonal downwards to the left.