Type III — Low-Pressure第 192 / 240 题
In a low-pressure chiller, the evaporator normally operates:
a.At very high positive pressure
b.Below atmospheric pressure, in a vacuum
c.At exactly atmospheric pressure
d.Above the condenser pressure
解析
The evaporator of a low-pressure chiller runs below atmospheric pressure, that is, in a vacuum, because the refrigerant boils at a low temperature under low pressure. This vacuum is why leaks admit air and moisture. Understanding this is central to all Type III procedures.
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