The heating capacity of an air-to-air heat pump does what as outdoor air gets colder?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Get ready for the UA STAR Test. Study with flashcards and multiple choice questions, featuring hints and detailed explanations. Ace your exam!

Multiple Choice

The heating capacity of an air-to-air heat pump does what as outdoor air gets colder?

Explanation:
Outdoor air acts as the heat source for an air-to-air heat pump. When the outside air cools, it contains less thermal energy to extract, so the system can deliver less heat to the indoor space at a given condition. This happens because the refrigerant loop must pull heat from colder air, which reduces the amount of heat that can be transferred inside and lowers the unit’s heating capacity. The efficiency, or COP, also drops in colder conditions, meaning more energy is needed for each unit of heat and, to maintain comfort, the system may rely on supplemental heat. So as outdoor air gets colder, heating capacity decreases.

Outdoor air acts as the heat source for an air-to-air heat pump. When the outside air cools, it contains less thermal energy to extract, so the system can deliver less heat to the indoor space at a given condition. This happens because the refrigerant loop must pull heat from colder air, which reduces the amount of heat that can be transferred inside and lowers the unit’s heating capacity. The efficiency, or COP, also drops in colder conditions, meaning more energy is needed for each unit of heat and, to maintain comfort, the system may rely on supplemental heat. So as outdoor air gets colder, heating capacity decreases.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy