The Mechanics of a Geothermal Heat Pump
Today I will continue our discussion on pool heating systems with an overview of geothermal heat pumps.
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In continuation of my course, “Choosing the Right Swimming Pool Heating System,” today I’ll be discussing the function and mechanics of geothermal heat pumps.
When you hear the term ‘geothermal,’ what do you think of?
‘Geo-’ means ‘earth,’ and ‘-thermal’ means ‘heat.’ Old Faithful geyser, the popular tourist destination at Yellowstone National Park, is just an example of the kind of power that can be harnessed for human use. The vapor and steam that erupt from the geyser is high-grade geothermal energy.
Another high-grade geothermal area of interest you might have heard of is Warm Mineral Springs in North Port. The water there bubbles at 87 degrees Fahrenheit and flows out into a lake, issuing a strong sulfur smell.
At Symbiont, we use low-grade geothermal power. When the sun heats the Earth, that heat is stored in groundwater, and we use our technology to operate heating and cooling systems by harnessing this phenomenon.
At 1:40 in the video above, you’ll see a map of the United States indicating the temperature of groundwater in wells that range in depth from 50 to 150 feet. In Florida, the average temperature of the water is 75 degrees. In the winter, this heat acts as a great source for our heat pumps. In the summer, this same temperature acts as a great sink, or a place to put heat back into the ground, if you’re using our cooling system.
As a recap for how a geothermal heat pump works, refer to 2:25 in the video above. Similar to the air pump we’ve discussed before, our heat pump differs only in that it has two water coils instead of the fan. It still has a compressor, refrigerant flow control, the condenser, and the evaporator. The refrigerant flows through, changing states depending on where it is in the cycle.
If you have any questions about geothermal heat pumps, please feel free to contact me. I’d be glad to help answer any questions you have.