Question 124Refrigeration/AC - 1st Asst/Chief70% to pass
Which of the statements listed is applicable to the thermostatic expansion valve shown in the illustration? Illustration GS-RA-07
AI Explanation
The correct answer is D) The control bulb is located on the evaporator coil outlet.
The thermostatic expansion valve regulates the flow of refrigerant into the evaporator coil based on the temperature at the evaporator outlet. The control bulb, which contains a thermostatic fluid, is placed at the evaporator outlet to sense the temperature of the refrigerant leaving the coil. This allows the thermostatic expansion valve to adjust the refrigerant flow to maintain the proper superheat and temperature in the evaporator.
The other options are incorrect because: A) The thermostat, not the thermostatic expansion valve, regulates the temperature of the refrigerated space. B) The thermostatic expansion valve regulates superheat, not the solenoid valve. C) The external equalizing pipe is connected to the suction line, not the liquid receiver.
Related Questions
#122 Besides the evaporator pressure, the thermal expansion valve reacts directly to changes in what parameter? #123 In a vapor compression type refrigeration cycle, the refrigerant temperature decreases the most when passing through which system component? #125 In the multi-evaporator refrigeration system shown in the illustration, what is the proper name for the valve labeled "29"? Illustration GS-RA-12 #126 When the sensing bulb of a thermostatic expansion valve is charged with a fluid different from the charge used in the system, what name of the charge is associated with the power element? #127 Which of the following illustrated thermal expansion valves would be appropriate to use on an evaporator coil with a 2 psi pressure drop, where externally adjustable superheat and a replaceable power element are both desired? Illustration GS-RA-06