In a TXV system, which list correctly identifies low-pressure side components?

In a TXV system, which list correctly identifies low-pressure side components?

• A. evaporator; accumulator; 1/2 TXV
• B. 1/2 compressor; evaporator; 1/2 TXV
• C. 1/2 compressor; condenser; evaporator
• D. 1/2 compressor; evaporator; accumulator

Answer: (B)

In a TXV system, the low-pressure side is the path from the evaporator back toward the compressor suction, including the suction portion of the compressor, the evaporator itself, and the expansion device just before the evaporator. The thermostatic expansion valve sits on the low-pressure side and meters flow into the evaporator, while the evaporator operates at low pressure to absorb heat. So the set that includes the suction-side portion of the compressor, the evaporator, and the expansion device correctly represents the low-pressure side. The high-pressure side would be the compressor discharge and the condenser, which are not part of this low-pressure group.

In a TXV system, the low-pressure side is the path from the evaporator back toward the compressor suction, including the suction portion of the compressor, the evaporator itself, and the expansion device just before the evaporator. The thermostatic expansion valve sits on the low-pressure side and meters flow into the evaporator, while the evaporator operates at low pressure to absorb heat. So the set that includes the suction-side portion of the compressor, the evaporator, and the expansion device correctly represents the low-pressure side. The high-pressure side would be the compressor discharge and the condenser, which are not part of this low-pressure group.