The sensing bulb of the thermostatic expansion valve is located at th...
The thermostatic expansion valve consists of a needle valve and a seat, a metallic diaphragm, spring, and an adjusting screw. In addition to this, it has a feeler or thermal bulb mounted on the suction line near the evaporator coil outlet. The feeler bulb is partly filled with the same liquid refrigerant as used in the refrigeration system.
View all questions of this test
The sensing bulb of the thermostatic expansion valve is located at th...
Location of Sensing Bulb in Thermostatic Expansion Valve
Introduction:
The thermostatic expansion valve is an essential component of the refrigeration system which regulates the flow of refrigerant to the evaporator. It maintains the evaporator's superheat temperature at a constant level to ensure efficient operation of the system.
Sensing Bulb:
The sensing bulb is a small tube that contains a refrigerant charge and is attached to the inlet or outlet of the evaporator. It senses the temperature of the refrigerant leaving the evaporator and regulates the flow of refrigerant accordingly.
Location of Sensing Bulb:
The location of the sensing bulb in the thermostatic expansion valve is crucial for efficient operation of the refrigeration system. The correct location of the sensing bulb ensures that the valve operates according to the evaporator's actual superheat temperature.
The correct answer to the question is option 'A' - the sensing bulb of the thermostatic expansion valve is located at the exit of the evaporator. This location allows the sensing bulb to sense the temperature of the refrigerant leaving the evaporator, which is the most accurate representation of the evaporator's superheat temperature.
If the sensing bulb were located at the inlet of the evaporator, it would measure the temperature of the refrigerant entering the evaporator, which may not accurately reflect the actual superheat temperature of the evaporator.
Therefore, it is essential to ensure that the sensing bulb is located at the exit of the evaporator to ensure efficient operation of the thermostatic expansion valve and the refrigeration system as a whole.
To make sure you are not studying endlessly, EduRev has designed Railways study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Railways.