Which outcome occurs when a positive displacement refrigerant pump operates with excessive superheat?

💡 Explanation

When operating with excessive superheat, the refrigerant vapor density decreases, causing decreased mass flow, which reduces the pump's volumetric efficiency because the pump moves less amount than specified. Because of the greater expansion and less refrigerant pumping, overheating further happens. Therefore reduce heat transfer occurs, rather than changes, and bearing requires an entirely different thermal mechanism.

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