Question 61Refrigeration/AC - QMED70% to pass
In a refrigeration system, the bulb for the thermal expansion valve is always located where?
AI Explanation
The correct answer is D) at the evaporator coil outlet.
The thermal expansion valve bulb is located at the evaporator coil outlet because this is the point where the temperature of the refrigerant leaving the evaporator coil needs to be monitored. The thermal expansion valve regulates the flow of refrigerant into the evaporator based on the temperature and pressure at the evaporator outlet, in order to maintain the proper superheat and ensure efficient operation of the refrigeration system.
The other options are incorrect because the thermal expansion valve bulb needs to be positioned to sense the temperature of the refrigerant at the evaporator outlet, not at the inlet, middle, or beginning of the evaporator coils.
Related Questions
#59 Rather than design an infinite variety of thermostatic expansion valve sizes to accommodate different capacities for heat removal, some manufacturers use a few standard valve body sizes in conjunction with what other feature? #60 Which of the following illustrated expansion valves is designed to maintain a constant evaporator pressure rather than a constant evaporator superheat? Illustration GS-RA-24 #62 Which of the valves listed is normally closed when charging the refrigeration system through the high side? #63 After the refrigerant has been recovered, leaks repaired if necessary, the system ideally should undergo a dehydration evacuation prior to recharging with refrigerant. As shown in the illustration, besides the vacuum pump suction manifold isolation valve being opened, what would be the proper valve positions to accomplish and prove the evacuation? Illustration GS-RA-51 #64 In a refrigeration plant, what is one vital purpose of the receiver?