When will the BTU transfer between evaporator and condenser be greatest?

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Prepare for the New York City Refrigeration License Exam I. Utilize flashcards, multiple-choice questions, and detailed explanations to boost your readiness. Ace your licensing exam!

Multiple Choice

When will the BTU transfer between evaporator and condenser be greatest?

Explanation:
Heat transfer rate is driven by the temperature difference between the two heat exchangers. In a refrigeration cycle, the evaporator operates cold to absorb heat from the space, while the condenser operates hot to reject heat to the surroundings. The larger the temperature difference between the evaporator and condenser, the stronger the driving force for heat flow, so more BTU per hour can be transferred. Therefore, when the evaporator is very cold and the condenser is very hot, the BTU transfer between them is greatest. If the temperature difference is smaller, the transfer rate drops.

Heat transfer rate is driven by the temperature difference between the two heat exchangers. In a refrigeration cycle, the evaporator operates cold to absorb heat from the space, while the condenser operates hot to reject heat to the surroundings. The larger the temperature difference between the evaporator and condenser, the stronger the driving force for heat flow, so more BTU per hour can be transferred. Therefore, when the evaporator is very cold and the condenser is very hot, the BTU transfer between them is greatest. If the temperature difference is smaller, the transfer rate drops.

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