Question

In an NH3 dry expansion evaporator with TXV and bulb clamped properly on the outlet of the evaporator, the superheat is

A) 7 to 10° F
B) 5 to 9° F
C) 20 to 30° F
D) 1 to 2° F

Answer 1

The superheat in an NH3 dry expansion evaporator with TXV and bulb clamped properly on the outlet of the evaporator is typically 7 to 10° F.

Step-by-step explanation:

The superheat in an NH3 dry expansion evaporator with TXV and bulb clamped properly on the outlet of the evaporator is typically 7 to 10° F.

Superheat refers to the temperature of the refrigerant above its boiling point at a given pressure. In this case, NH3 (ammonia) is the refrigerant. The TXV (thermostatic expansion valve) regulates the flow of refrigerant into the evaporator, and the bulb clamped properly on the outlet of the evaporator helps to maintain a stable superheat.

By maintaining the superheat within the range of 7 to 10° F, the evaporator operates efficiently and prevents any liquid refrigerant from entering the compressor, which can cause damage.