33) Degree of saturation or percentage humidity is
Answer is:
the ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers
Answer is:
removes heat from a low temperature body and delivers it to a high temperature body
Answer is:
increases C.O.P.
Explanation:
Undercooling or Subcooling of Refrigerant: Sometimes, the refrigerant after condensation process is cooled below the saturation temperature before expansion by throttling. Such a process is called undercooling or subcooling of the refrigerant. The ultimate effect of undercooling is to increase the value of coefficient of performance.
The process of undercooling is generally brought about by circulating more quantity of cooling water through the condenser or by using water colder than the main circulating water. Sometimes this process is also brought about by employing a heat exchanger. In actual practice, the refrigerant is superheated after compression and undercooled before throttling.