Question 173Refrigeration/AC - Assistant Engineer70% to pass
In a refrigeration system, the bulb for the thermal expansion valve is always located where?
AI Explanation
The correct answer is C) at the evaporator coil outlet.
The thermal expansion valve (TXV) bulb is located at the evaporator coil outlet because this is the point where the refrigerant exits the evaporator. The TXV bulb senses the temperature of the refrigerant leaving the evaporator and adjusts the valve opening to maintain the proper superheat, which is critical for the efficient operation of the refrigeration system.
The other options are incorrect because: A) the middle of the evaporator coils is not the optimal location for the TXV bulb, B) the inlet of the evaporator is not the best place to sense the refrigerant temperature, and D) the bottom row of the evaporator is not the proper location for the TXV bulb.
Related Questions
#171 Which of the precautions listed should be taken before opening any part of a refrigeration system for the purpose of accomplishing non-major repairs? #172 When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, what should be done to compensate for or to correct this situation? #174 In a refrigeration system, the pressure within the power element of a thermostatic expansion valve depends directly upon what factor? #175 What is one function of the thermal expansion valve used in a refrigeration system? #176 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