Geothermal HVAC
Geothermal is a system that can provide cooling and heating. The temperature of the earth below the surface remains relatively constant throughout the year.
A geothermal system is made up of a heatpump, underground loops and the distribution system. Learn more about the different components that make up this energy-efficient system:.
Ground Loop
The Ground Loop is essential to the effectiveness and longevity of geothermal heating and cooling system. It is comprised of pipes that are either placed in the yard and connect to the heat pump in your home. The piping is then filled with a water-based fluid that circulates to absorb or disperse heat based on the needs of your home. The temperature of the ground is constant between four and six feet below the surface level, which makes it an ideal energy source for geothermal systems.
When the system is heating up, the liquid that transfers heat absorbs heat from the earth. It then transmits the heat to the heat pump inside your home. The fluid is then returned to the loop where it begins circulating again. In cooling mode, the system employs the opposite process to eliminate the excess heat and return it back to the loop, where it begins the next cycle.
In a closed loop system, the pipe is filled with a water-based solution, and then placed in the ground. The solution is safe and non-toxic to the environment and does not pollute the water supply in underground. The system can be used to use the pond, lake or other body of water to provide heat transfer fluid. This is even more environmentally friendly.
Open and closed systems can be vertical or horizontal, depending on the space you require. The vertical system requires fewer trenches than horizontal systems and is less disruptive to your landscaping. It is often used in areas where soil depths are shallow or in areas where existing landscaping must be maintained.
It is important to select an experienced installer regardless of the type of system. It is important to have an efficient and well-designed system, as geothermal systems consume a lot of energy. A quality installation will ensure the long-term viability of your system and help you save money on electricity over the long term. It is essential to flush the system frequently to eliminate any minerals that can reduce the flow and effectiveness of the heat transfer liquid. A GeoDoctor expert can help you determine the best system for your home.
Vertical Loop
Geothermal energy comes from the Earth and is used to heat or cool buildings. This energy is harnessed by using underground loops which absorb the thermal energy and transfer it to your building. The most commonly used type of geothermal system can be known as vertical ground loop. This kind of geothermal system is commonly used in residential and commercial applications. The system utilizes a heat pump to transfer heat from the earth into your home or office. In summer, it operates in reverse to provide cooling.
The thermal energy that is transferred from the ground to your building is stored in a network of buried pipes. These pipes are a crucial element of any geo-thermal hvac system. The pipes are made from high-density polyethylene. They circulate an emulsion of propylene glycol and water which is a food-grade antifreeze, through the system. The temperature of soil or water stays relatively constant within a few feet of the surface. The closed-loop geothermal system can be more efficient than other heating methods like gas boilers and furnaces.
These loops can either be placed in an excavation horizontally or in boreholes that are drilled from to 400 feet deep. Horizontal trenches are generally used for larger properties with lots of land available, while vertical boreholes are ideal for homes or businesses with small spaces. Installing a horizontal ground loop involves digging trenches, which can take a lot of time and effort. In addition, the ground must be compacted to ensure the loops are able to hold a solid hold on the soil.
On the other hand, a vertical loop system can be set up much faster and more easily than a horizontal loop field. The technician digs holes of 4 inches in diameter spaced 20 feet apart. He then connects the pipe to form a closed circuit. The number of holes needed will depend on the size of your building and the energy needs.
It is vital to maintain the loop fields to keep your geothermal system operating at its top efficiency. This means removing any debris and conducting periodic tests for bacteriological issues.
Horizontal Loop
Geothermal heat pumps transfer energy between your home and the ground or a nearby body of water, rather than taking energy from the outside air. This is because ground and water temperatures remain relatively stable, unlike the fluctuating outdoor temperature. There are four major types of geothermal heating loops, and the one your system uses depends on your property size and layout. The type of loop used and the method used to install it determine the efficiency and effectiveness your geothermal system.
Horizontal geothermal systems use a series horizontal pipes placed in trenches that are between four and six feet in depth. The trenches are designed to hold three to four pipe circuits. The pipe circuits are connected to a manifold, which is the geothermal heat pump’s central control unit. The manifold is a conduit for heated or chilled water into your home’s heating or cooling ductwork.
In the beginning, these pipes were installed in vertical trenches which required a larger area to cover the pipes. As technology advanced and technology improved, it was discovered that layering a single pipe back and forth at various depths in trenches that were smaller could help reduce space requirements and costs without sacrificing performance. This is the reason for the “slinky” method of constructing horizontal geothermal loops.
In cases where there isn’t enough land available, a vertical loop system is a good alternative. It can also be an option for homes located in urban areas, where the topsoil is a bit thin and there is little if any space for horizontal loops. If your property is located in an earthquake-prone zone and is unable to support a horizontal loop system, the vertical loop could be the best choice.
If you have lots of water, ponds or lakes can be a great option for your home. This kind of system operates exactly like a vertical or horizontal ground loop geothermal heat pump but the water is used to heat and cooling, instead of the earth. It is important to keep in mind that a geothermal system using lakes or ponds will not work in the event of a power outage. A backup generator should be installed to supply an electric source during this period.
Desuperheater
Geothermal heating and cooling is a highly efficient alternative to conventional methods. When it comes to switching, homeowners have to balance upfront costs with energy savings in the long run. Many factors are involved including the soil’s composition and climate of the area. One of the most important choices is whether or not to put in ground loops or to use an external tank for hot water. The latter is less expensive but may not provide the same level of efficiency.
A desuperheater transfer heat from geothermal heating systems to your domestic hot water tank. It is designed to function in the winter when the cooling process of the system produces heat that is not needed. The desuperheater eliminates this waste heat and utilizes it to improve the efficiency of your heating system. It also reduces your energy consumption by utilizing existing resources.
The ideal design for a desuperheater depends on several physical, thermal, and geometric variables. These variables include the injection angle, temperature of the spray water and the nozzle design. These are all aspects that can affect the performance and efficiency of the desuperheater.
In the summer, desuperheaters can save up to 80 percent more in a climate with a high degree of heating than traditional hot water heaters. This is because the desuperheater makes use of the energy that is emitted from the home during the cooling process and converts it to useful heat for the hot water generator. The geothermal system can provide hot water to homes for 3 to 5 months of the year, at a fraction of the cost of alternative energy sources.
The desuperheater also helps in winter when a geothermal system is operating at its lowest capacity. The device takes away the extra heat produced by the cooling system and then adds it to the domestic hot water tank. This allows the domestic hot water tank to make use of this free energy, and increases the heating capacity of the system. The desuperheater could be used to reduce the time that a geothermal system is active in a heating dominated climate.