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What is Geothermal HVAC? How Does It Work?

What Is Geothermal HVAC?

Earth’s heat exchange temperature is used by geothermal HVAC and power systems. Although some regions of the country have extreme climate conditions, the underground temperatures remain constant. geothermal heat and air pumps are considered to be a form of the heat pump with high efficiency. Such systems depend on thermal transfers from air to soil to heat and cool houses and buildings. Two other types of geothermal systems are geothermal and deep geothermal direct usage, and geothermal enhancement. For areas with a volcanic or tectonic activity that lead to naturally warmed groundwater, the active use of geothermal systems is popular. Hot water is used in such systems to heat the air in the building in its existing condition or in heat exchangers.

Deep and improved geothermal systems are used to generate electricity for large commercial, industrial and agricultural uses. They depend on steam far under the surface of the Earth.

How Do Geothermal HVAC Systems Work?

Geothermal HVAC systems use the same cooling technology as other HVAC / R systems Under Thermodynamics ‘ Second Law, heat moves automatically from hot or moist to cold. In geothermal HVAC systems, an electrically operated Thermo pump runs fluid into long loops of underground pipes, normally water or refrigerant. This cycle moves the heat to the ground from the ambient air of the building and vice versa.

The heat pump delivers fluid to the pipes during winter and there is an increase in the temperature of the fluid by the warmer rock soil or water below. Then the warm fluid is reversed to the house. An exchanger can then transfer the heat from the fluid to the heating system of the building to heat the air The water temperature for use in the house can be improved by using a desuperheater. The cycle is then replicated by pumping the colder fluid into the ground and then injecting it into the house.

The same process happens in summer but this time the liquid absorbs heat in the sun, spreading it into the ground This method removes heat from the air in the building constantly, thus refrigerating it.

Can I Use my HVAC With Geothermal Energy?

Yes, You can. Your current HVAC system will also be adapted to the modern energy source. A heat pump from the ground source collects and removes the heat from the floor. Your HVAC distributes heating throughout the space from there.

Discover Geothermal Cooling

Although geothermal energy is primarily related to heating, the cooling potential should not be ignored. Heat is extracted in the cooling process from the air in your home and replaced from the ground with cool air. This can be possible because the World has a steady year-round temperature and in summer will act as a heat sink. You no longer need to worry about the failure of your AC system and the hydraulic HVAC function.

Where Is Geothermal HVAC Currently Used?

What About Geothermal Ventilation?

The constant temperature contact with the Earth is at the center of the geothermal system.  This process constantly extracts the air in your house When the temperature is negligible between home and outside, the air can be heated by the intake grill in the spring and fall months.

Where Is Geothermal HVAC Currently Used?

In large commercial buildings as well as in small houses, geothermal HVAC can be used. The only difference is the size of the soil loops that have to be buried in the soil. For instance, geothermal heating and cooling benefit Nydalen Business Park in Norway. The University Hospital of Akershus also produces 8 MW of cooling and 28 MW of heating. Geothermic HVAC is also used in the country’s national stadium and airport. In less than 2 years, the investment in the airport is estimated will payback.

More than a million heat pumps from land sources in both residential and industrial environments have been installed in the United States. However, few people know how it works and how it can save money.

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IS THE INITIAL COST MAKING YOU THINK TWICE?

While geothermal heating and cooling systems are highly energy efficient and long-term savings, the initial cost still forms an obstacle to residential homeowners. Take time to look into geothermal heating and cooling for residential homes if this is a factor for you.

Two things increase the efficiency of a HVAC geothermal than the conventional HVAC system.

Resources used to run the system

Geothermal HVAC systems use a small amount of electricity to power a geothermal heat pump to transfer heat.

This is more effective than modern HVAC systems because conventional HVAC systems are heating or cooling using electric or gas power at the temperature you like. Additionally, there are no large amounts of gas or electricity used to heat air in a geothermal HVAC system. Geothermal HVAC systems instead use your existing heat to keep the desired temperatures in and out of your house.

Temperature Consistency

The outside conditions tend to vary greatly, which can make it difficult for a conventional HVAC system to raise or lower temperatures in hot or cold seasons. Nonetheless, in the heat of your home geothermal HVAC systems change the temperature depending on surface conditions, which are lower than the air outside.

Also do not get heat pumps confused with heat pumps from the air source. To homemakers living in regions of the country with daily temperatures below 40 degrees, an air-source heat pump is not recommended.

If your equipment will work properly in cold extremes ensure that you have a suitable loop region when cold weather hits with your HVAC professionals. A proper loop field will reduce overtime from your electric heating network and will eliminate the heat from freezing from the surrounding soil from being extracted. You’ll also want to insure that you’re not too easily attempting to heat your home.

geothermal heating and cooling pros and cons

Advantages of Geothermal Energy

Environment-Friendly

Geothermal energy without burning fossil fuels is produced from the upper crust of the Planet. Geothermal fields are hardly carbon sources or have low pollution. In comparison, geothermal energy may save up to 80% on conventional energy sources in terms of costs.

Huge Potential

The total worldwide energy consumption of almost 15 TW isn’t similar to the massive energy reserves under the eath. The potential capacity of geothermal energy produced by geothermal power plants is estimated to vary from 0,035 to 2 TW. All geothermal reservoirs are not profitable and can only be used with a small amount of the total potential.

A Stable Energy Resource 

The efficiency of a geothermal plant is relatively simple to predict It is not as low in energy as winds or solar variability. Conventional power plants depend largely on fuel so the cost fluctuates depending on the market price of the fuel for electricity generated.

Disadvantages of Geothermal Energy

Greenhouse Emissions

Even though geothermal energy is a friendly source of environmentally, it still raises some pollution issues. The geothermal energy extraction process under ground leads to the emission of greenhouse gases including CO2, sulfide hydrogen, methane and ammonia. Nevertheless, in comparison to fossil fuels the amount of gas emissions is much lower.

Surface Instability

The building of geothermal power systems poses a risk to the stability of the land An earthquake with a magnitude of 3.4 at the Richter point triggered a continuous geothermal plant in Switzerland in January 1997.

High Investment Costs 

Geothermal energy extraction can result in high initial costs for individual households. The processes such as drilling and installation are complex and costly.

Land Requirements for Installing the Geothermal System 

Next to the house, a part of the land needs to be installed on geothermal systems. Due to its limited space, it is particularly difficult for homeowners in big cities to implement this.

Reference:

https://solarfeeds.com/geothermal-energy-advantages-and-disadvantages/

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