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  • MR. : We all want to save money heating or cooling our house or office, right? The answer

  • may be under your feet, literally. Much of the heating and cooling can come from the

  • ground, below the surface, with something called a geothermal heat pump. You see, below

  • the frost line about 10 feet down, the Earth maintains a nearly constant temperature of

  • 54 degrees. We can tap into this energy to provide heating in the winter and cooling

  • in the summer.

  • OK, now, here’s how it works. Bury a loop of pipes called a heat exchanger just below

  • the surface, and fill them with water or a water and antifreeze solution. During the

  • winter months, the air is usually cooler than the temperature below ground. The solution

  • circulates in a loop underground and absorbs the Earth’s heat. This heat is brought to

  • the surface and transferred to a heat pump. The heat pump warms the air, and then your

  • regular heating system warms the air some more to a comfortable temperature. Finally,

  • ducts circulate the air to the various rooms.

  • Now, a huge benefit is that the geothermal system doesn’t have to work as hard to make

  • people inside comfortably warm, and you save lots of money on your heating bill. In the

  • summertime, the system works in reverse. When it’s hot outside the temperature below the

  • surface is cooler than the summer heat. So the fluid in the loop absorbs heat in the

  • building and sends it underground. The ground’s lower temperature cools it, and it’s circulated

  • again and again. Now youre saving money on air conditioning.

  • Now, this church uses a large geothermal heat pump to heat and cool the building. It has

  • a very big parking lot, which lets it spread out is loop horizontally. But if you don’t

  • have all that space, you can go straight down and use a vertical loop system instead.

  • Geothermal heat pumps can be used just about anywhere in the U.S. because all areas have

  • nearly constant shallow-ground temperatures, although systems in different locations will

  • have varying degrees of efficiency and cost savings.

  • The constant temperature of the Earth just below our feet is a sustainable resource literally

  • in our own backyard. It’s a clean energy source ready for us to use to heat and cool

  • our homes and buildings while lowering our utility bills.

MR. : We all want to save money heating or cooling our house or office, right? The answer


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B1 中級

能源101:地熱泵 (Energy 101: Geothermal Heat Pumps)

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    richardwang 發佈於 2021 年 01 月 14 日