Question

The subcooling effect of the liquid refrigerant just before the expansion valve causes increased?

1) horsepower
2) refrigeration effect
3) expansion valve capacity
4) refrigerant flow

Answer 1

Subcooling the liquid refrigerant before the expansion valve increases the refrigeration effect, enhancing the efficiency of the refrigeration system.

Step-by-step explanation:

The effect of subcooling the liquid refrigerant just before it passes through the expansion valve in a refrigeration cycle is an important aspect in improving the efficiency of the refrigeration system. When a refrigerant is subcooled, its temperature is reduced below its saturation temperature at the given pressure. This process increases the refrigeration effect because a cooler liquid entering the evaporator will absorb more heat as it vaporizes, which in turn leads to better performance of the refrigeration system.

Addressing the multiple-choice question provided, subcooling does not increase the horsepower or the refrigerant flow directly; rather, it enhances the refrigeration system's efficiency by increasing the refrigeration effect. Therefore, the correct answer to the question is option 2) refrigeration effect.