A capillary tube or fixed-orifice in small sealed domestic refrigeration is primarily fixed for which operating envelope compared with a TXV in larger split systems?
Choices
- (A) Always matches any indoor RH
- (B) Unlimited part-load with perfect SH
- (C) Replaces ventilation OA
- (D) One design mass-flow/pressure-temperature locus; not actively modulated like TXV, cost-driven trade-off in small units
Correct answer: (D)
One design mass-flow/pressure-temperature locus; not actively modulated like TXV, cost-driven trade-off in small units
Explanation
Cap-tube: cheap, but narrow envelope; TEV/EXV: control.