2 posts • Page 1 of 1
- Posts: 2999
- Joined: Mon Feb 17, 2014 11:20 pm
- Trade Experience: 30
- Service History: Primarily residential, with an occasional light commercial something.
- Trade Certifications: Expired NATE's, State Certified Contractor
- Location: SouthEast
The attached PDF is a modified slide presentation, offering a simplified illustration of how heat pumps heat and cool the home.
One of the MFIC's...
- Posts: 2074
- Joined: Fri Feb 21, 2014 7:57 pm
- Trade Experience: 37
- Service History: Chiller Technician
- Trade Certifications: LA State Lic Mechanical / MS State Lic HVAC / CRCM
- Location: Southeast Louisiana
We could say a heat pump moves heat from one location to another. Often it is more economical based the cost of available fuels to move heat with a heat pump than to make heat using fossil fuels. As long as the outdoor temperature doesn't drop below zero Fahrenheit, A heat pump is cheaper than resistance electric heat because the Coefficient of Performance is always going to be greater than 1 to 1, as in resistance electric heat. We put resistance heat in the heat pump to maintain tolerable discharge air temperatures when the system goes into a defrost cycle. If it is cold enough outside our COP goes down, the capacity in the heat mode goes down, and sometimes we have to supplement the heat pumps output with resistance electric heat to maintain comfort in the conditioned space.
"We do these things not because they are easy, but because they are hard"
-John F. Kennedy, Rice University, Sept. 12, 1962
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