Question

What Is The Use Of Capillary Tube?

Answer 1

Capillary tube metering systems are mostly used in household and small business applications where the evaporators are subjected to relatively consistent heat loads. These systems typically use completely hermetic compressors and have modest refrigerant flow rates. Capillary tubes are used by manufacturers because they are simple and inexpensive. Furthermore, most systems that use capillary tubes as metering devices don't require high-side receivers, which saves money.

Complete step-by-step solution:
The capillary tube is used in a variety of disciplines. Capillary tubes, for example, are employed in refrigeration to regulate the flow of refrigerant.
Capillary tubes are used in labs to collect samples of liquids that flow into the tube against gravity.
In a refrigeration system, the pressure drop across the capillary tube will regulate the refrigerant flow. The flow at a given pressure would be determined by the tube's diameter and length. It won't keep evaporator pressure or maintain superheat. There are no moving components, therefore it will not wear out. When the load is largely consistent, they are employed.
When the refrigerant enters the capillary tube from the condenser, the pressure is reduced due to the small diameter of the tube. The pressure drop is obtained when the diameter is small and the length is long. Because the capillary tube is a non-adjustable device, the refrigerant flow cannot be regulated, and the flow of refrigerant will fluctuate in response to changes in the environment. As a result, the capillary tubes are made to withstand specific environmental conditions. So, if we choose a capillary tube carefully, it may be used in a variety of situations.

Note: What are the benefits of using a capillary tube?
It is not prohibitively costly.
It doesn't require any upkeep.
Due to the same pressure on both sides of the compressor, the starting torque required for the motor would be reduced.
It may be utilised in hermetic compressor-based systems that are factory built and critically charged.