June 3, 2022 Last updated June 3rd, 2022 2,298 Reads share

Geothermal heat pumps: How do they work?

Geothermal heat pumps: How do they work?Image Credit:

Many people have used geothermal energy to heat their houses in the winter, cool them in the summer, and supply plenty of hot water all year while saving up to 80% on their utility bills. The crucial question is how this copious energy can be used to provide heating and cooling? And the answer is by installing geothermal heat pumps.

The geothermal system consists of many parts such as vav terminals, central air handlers, auxiliary boilers, and water pumps. Below we have mentioned in detail how the geothermal heat pump works. 

 

What are Geothermal Heat Pumps?

Geothermal heat pumps, also known as ground-source heat pumps, are high-efficiency renewable energy technology that is gaining popularity in both residential and commercial structures. Space heating and cooling, as well as water heating, are all possible with geothermal heat pumps. Ground source heat pumps have the advantage of concentrating natural heat rather than creating heat through the combustion of fossil fuels.

They are in use since the 1940s. Rather than using the exterior air temperature to heat homes and offices during the winter, geothermal heat pumps use the heat beneath the earth’s crust. During the winter, heat from beneath the earth is used to heat homes, as the heat pump system removes heat from the heat exchanger and pumps it into the interior air delivery system.

During the summer, the process is reversed, with the heat pump moving heat from the interior air into the heat exchanger. The heat from the heat pump can be utilized to heat water, providing a source of hot water in the summer.

Dry steam, flash steam, and binary cycle power plants are the three basic power plant types that utilize geothermal as an energy source.

How Does a Geothermal Heat Pump Work?

A geothermal heat pump system, which consists of three basic components: the heat pump unit, the ground heat exchanger, and the air delivery system or ductwork, provides heating and cooling. The heat exchanger is made out of a loop of pipes that are inserted a few feet beneath the ground near the building. A liquid (a mix of water and antifreeze) runs through the pipes to absorb or dissipate heat into the ground. During the winter, the fluid is usually mixed with antifreeze to keep it from freezing.

The operation of a geothermal heat pump is similar to that of a refrigerator. By transporting heat to a significantly warm region (the space surrounding the interior of the refrigerator), a refrigerator makes a chilly place (the inside of the refrigerator) much cooler.

During the winter, the geothermal heat pump collects heat from the ground heat exchanger and distributes it to the building’s air transfer system, keeping the residents warm and comfortable. The cycle is reversed in the summer. The geothermal heat pump absorbs heat from indoor air and transmits it to a ground heat exchanger. The heat is dumped into the earth through the heat exchanger. In the summer, the heat recovered from inside the structure can be used to heat water, giving homeowners free hot water all summer.

Because they tap natural, free heat beneath the ground, geothermal heat pumps are significantly more advantageous than typical heating and cooling systems. When it comes to cooling your home, they are also extremely efficient. Efficient functioning benefits the homeowner because it saves energy, money, and pollutants while also reducing environmental deterioration.

Not only do geothermal heat pumps save energy and money, but they also help to reduce pollution. They are also more effective in keeping the house cool.

Benefits of Geothermal heat pumps

Geothermal heat pumps may have a high initial cost, but the proven benefits this investment will provide your family for years to come are incomparable. When evaluating the benefits and drawbacks of various HVAC systems, consider geothermal heating and cooling systems, which can significantly enhance energy efficiency and savings in your home.

  • Operating costs are lower.

Despite higher upfront expenses for purchasing and installing a geothermal heat pump, geothermal heating and cooling technology provides lower running costs. You will undoubtedly see savings over time.

A geothermal system has a 400% efficiency rating, producing four units of energy for every unit of electrical energy produced. These systems do nothing more than transport heat. It is not produced by the combustion of fuel. They pull energy from the earth, allowing most homeowners to save up to 70% on utility expenditures.

  • Environmentally Friendly Operations

Geothermal heating and cooling systems are simply one of the most eco-friendly methods of heating and cooling your home. They emit no carbon monoxide or other greenhouse gases, which contribute to both your increasing carbon footprint and air pollution.

A geothermal system also has a low electricity demand, which can result in significant savings over the course of a year. If you are concerned about the environment, switching to geothermal energy is one of the smartest decisions you can make.

  • Enhanced Comfort

A geothermal system can provide several comfort-related benefits. Geothermal heat pumps provide excellent dehumidification and air filtration, thereby enhancing the quality of your indoor air. Furthermore, because geothermal systems do not recycle air, your family will face less dangers to indoor air quality, which will help everyone in your house, especially those with asthma or allergies.

  • Ready Access to Hot Water

Few homeowners recognize this benefit as a significant advantage of owning a geothermal system. Geothermal systems may produce as much hot water as you need while being more efficient than standard water heaters. Simply add a connector that permits hot water to be kept in your home’s water heater.

  • The Life-Cycle Cost

Traditional HVAC systems have an average lifespan of 10 to 15 years with adequate maintenance. Because geothermal heating and cooling systems are not positioned directly outside, they are not subject to usual weather-related wear and tear such as ice, snow, or rain. The indoor component comprises a fan, compressor, and pump that can last for decades. The remainder of the system (the earth loop) is buried beneath the ground outside your home and can endure numerous generations. It’s also good not to have an unattractive exterior unit that detracts from the curb appeal of your property.

Even better, the ground loop, which consists of geothermal pipes buried in your yard, usually comes with a 50-year warranty. Aside from occasional filter replacements and yearly professional inspections, geothermal systems require little to no maintenance.

  • Cash Flow That Is Positive

The majority of geothermal systems will pay for themselves in three to five years. The amount of energy saved may possibly exceed the cost of system installation over that time period.

When you combine those savings with government tax credits, your positive cash flow could begin even sooner. Knowing you’ll get a good return on your investment might take some of the sting out of the initial costs of purchasing and installing a geothermal system.

  • Operation is quieter.

Geothermal systems do not require external condensing units, and the internal components are built to be quiet. You won’t have to deal with the cooling or heating issues that other systems are prone to.

  • Safety

Geothermal systems are both safe and environmentally friendly. Because there is no combustion involved, your family does not need to be concerned about common issues like carbon monoxide poisoning. Geothermal technology replaces combustible fossil fuels with free, renewable energy from the earth, making the entire system safer than any other system on the market.

Ameer Hamza

Ameer Hamza

Read Full Bio