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Operating Principles
Economizer
The economizer system's two main components are an
electronic expansion valve (EXV) and a brazed plate heat
exchanger (BPHE).
The liquid flow leaving the condenser is routed through
the economizer BPHE. One side is the economizer
refrigerant flow and the other side is the evaporator
refrigerant flow.
The economizer flow is expanded to a lower pressure and
temperature through the economizer EXV, then routed
through the BPHE to be superheated, and injected into the
compressor. The evaporator flow is subcooled further in
the BPHE and continues on to the evaporator EXV.
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