The capillary tube used as expansion device in vapour compression system works on the principle of
Consider the following advantages of refrigeration system using capiilary tube:
1. The cost of capillary tube is less than ail other forms of expansion devices.
2. No receiver is necessary.
3. Low starting torque motor can be used to drive the compressor.
Which of above is/are valid?
Which of the following factor does not affect the condenser capacity?
The heat rejection factor (HRF) of a condenser is given by
The load on the condenser per unit of refrigeration capacity is known as HRF. Condenser load, Qc = Refrigerating capacity
The domestic refrigerator operating on vapour compression cycle uses the following device for expansion
Capillary tube is used as an expansion device in small capacity hermetic sealed refrigeration units such as in domestic refrigerators, water coolers, room air-conditioners and freezers.
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the
Hence capillary tube is placed between condenser and evaporator.
A capillary tube is employed in a refrigeration cycle to
Capillary tube control the flow of refrigerant by maintaining their enthalpy same.
Capillary tube is not used in large capacity refrigeration system because
The capillary tube is not used in large capacity refrigeration systems because Capacity control is not possible.
Which one of the following is the most important function of thermostatic expansion valve
Thermostatic expansion valve maintains constant degree of superheat in the evaporator.
In on-off control refrigeration system, which one of the following expansion devices is used?
On-off control is done by thermostat. In the On- off control of the air-handling unit, the fan motor is operated intermittently by the room thermostat the bulb of which is installed in the return air.