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Introduction to Heat Pumps - Problem Set 1.2

  1. Match the terms with the correct definition.
Definition Key Term
1) Nominal heating output of heat pump at 47°F (Btu/hr) as tested. a. Design Heating Capacity
2) Heat pump’s heating output at the outdoor air winter design temperature (Btu/hr). b. Design Heating Load
3) Overall cooling efficiency, typically ranges from 14-25. c. Displacement Heating
4) Lowest possible output for a given heat pump make and model at a given outdoor air temperature. d. Heating Capacity @ 5°F
5) Maximum heating capacity for a given heat pump make and model when the outdoor air temperature is 5°F. e. Minimum Heating Capacity
6) Instantaneous efficiency (heating or cooling), typically ranges from 2-5 for heat pumps and less than 1 for fossil fuel heating systems. f. Multi, Mini, Package, Split
7) Heating need to meet the target minimum winter indoor temperature setpoint (Btu/hr). g. Rated Heating Capacity
8) A design strategy where the heat pump is only intended to cover part of the home’s annual load, displacing heat that would otherwise come from another heating system. h. Refrigerant
9) A chemical compound that readily absorbs and releases heat by undergoing a phase change. Common types used in heat pumps include R410a, R32, R134a, R744 (CO2), R22 (phased out). i. SEER
10) System type descriptions. j. HSPF
11) Overall heating efficiency. Typical values are 7-18+. k. COP