Geothermal HVAC
Geothermal is a system that can provide both cooling and heating. The temperatures of the earth below the surface are fairly constant throughout the year.
Geothermal systems are made of a heatpump, underground loops, and a distribution system. Learn more about the various parts that make up this energy-efficient system.
Ground Loop
The Ground Loop is the key to a geothermal system’s effectiveness and durability. It is made up of pipes that are trenched or drilled in the yard and connect to the heat pump in your home. The piping will be filled with a water-based solution and then circulated to absorb or distribute heat depending on the needs of your home. The temperature of the ground is constant between four and six feet below the surface level, making it a great energy source for geothermal systems.
When the system is heating up, the heat transfer liquid absorbs heat from the earth. It then transfers that heat to the heat pump inside your home. The fluid is then pushed back to the loop where it begins the process of circulating. In cooling mode, the system uses the reverse process to remove the excess heat and return it back to the loop, where it starts a new cycle.
In a closed loop system, the piping will be filled with a solution made of water and buried underground. The solution is safe and non-toxic to the environment, and does not affect the water supply of underground. The system can also utilize the pond or lake to provide heat transfer fluid, which is more environmentally friendly.
Depending on the available space, closed and open systems can be set up vertically or horizontally. Vertical systems require less trenches than a horizontal system and minimizes disturbance to your landscaping. It is often used in areas where soil depths are low or in areas where existing landscaping must be maintained.
No matter what type of ground loop system you choose, it is essential to select an experienced installer. Geothermal systems require a lot of energy to operate, and it is crucial to have an efficient and well-designed system in place. A well-designed installation will ensure the longevity of your geothermal system, and saves your money on electricity costs in the long term. It is essential to flush the system frequently to remove any minerals that can reduce the flow and efficiency of the liquid used to transfer heat. GeoDoctor experts can help you determine the right system for your house.
Vertical Loop
Geothermal energy is derived from the Earth and is used to heat or cool buildings. This energy is harnessed by using a series of underground loops which absorb the thermal energy and transmit it to your building. The most common type of geothermal system is called vertical ground loop. This type of geothermal system is used most often in residential and commercial applications. The heat pump in this system takes the heat energy from the ground and carries it to your home or office. In the summer it reverses to provide cooling.
The thermal energy transferred from the ground to your home is stored in a network of underground pipes. These pipes are a crucial part of any geo-thermal HVAC system. The tubes are made from high-density Polyethylene and circulate water and propylene glycol, which is food-grade antifreeze. The temperature of the soil or water remains fairly constant, even only a few feet beneath the surface. The closed-loop geothermal system can be more efficient than other heating methods like gas boilers and furnaces.
The loops can be inserted into a trench horizontally or inserted into boreholes that are drilled from 100 to 400 feet deep. Horizontal trenches are generally used for larger properties with lots of land available and vertical boreholes are ideal for homes or businesses that have small spaces. The process of installing horizontal ground loops involves digging extensive trenches that can require considerable time and effort. The ground must also be compacted in order to ensure that the loops are securely attached to the soil.
On the other hand the vertical loop system can be constructed much more quickly and easily than a horizontal loop field. The technician makes holes of 4 inches in diameter spaced 20 feet apart. He then installs the pipe to form an enclosed circuit. The number of holes needed will depend on the size of your structure and the energy requirements.
It is vital to maintain the loop fields to keep your geothermal system operating at its best. This includes cleaning up debris and conducting regular tests for bacteriological issues.
Horizontal Loop
Geothermal heat pumps transfer energy between your home and the ground or the nearby body of water, instead of taking energy from the outside air. This is because the temperatures of water and ground remain relatively stable, compared to the fluctuating temperature of outdoor air. The dimensions and layout of your property will determine which loop to employ. The type of loop used and the installation method determine the efficiency and effectiveness your geothermal system.
Horizontal geothermal heat pump systems make use of a set of pipes buried horizontally in trenches that range from four to six feet deep. The trenches can hold up to three pipe circuits. The pipe circuits are connected to a manifold, which is the geothermal heat pump’s central control unit. The manifold then sends chilled and heated water to your home’s cooling and heating ductwork.
Originally the piping systems were installed in vertical trenches, which required more land space to surround the pipes. As technology advanced and technology improved, it was discovered that layering a longer single pipe back-and-forth in varying depths within smaller trenches could reduce costs and space requirements without sacrificing performance. This led to the invention of the “slinky method” of installing horizontal geothermal circuits.
A vertical ground loop system can be a great alternative to horizontal geothermal heat pump system in cases where there isn’t enough land area available. It is also a good option for homes located in urban areas where the topsoil is thin and there isn’t enough space for horizontal loops. If your home is in an earthquake-prone region and is unable to support a horizontal loop system, the vertical loop may be the best option.
If you have a lot of water available lakes or ponds can be the ideal alternative for your home. This kind of system is similar to a horizontal or a vertical ground loop geothermal heating system however, instead of using earth for heating and cooling it uses water to heat and cool. It is important to keep in mind that a system that utilizes lakes or ponds will not work in the event of a power outage. A backup generator must be installed to provide a source of electricity during this time.
Desuperheater
Geothermal heating is an efficient alternative to conventional methods. But when switching to geothermal homeowners must consider balancing upfront costs against the total energy savings. Many factors are involved such as the soil’s composition and the local climate. One of the most important choices is whether or not to bury ground loops, or install an external tank to store hot water. The latter option is less expensive but may not offer the same level of efficiency.
A desuperheater transfers heat from a geothermal heating system to your home hot water tank. It is designed to work during winter, when the cooling process of the system produces excess heat. The desuperheater utilizes this wasted heat to increase the heating performance of your home. It also reduces your energy consumption by using existing sources.
The best design of a desuperheater dependent on various physical, geometric, and thermal variables. These factors include the injection angle, the temperature of the water spray, and the nozzle’s design. These are all significant elements that impact the performance and operation of the desuperheater.
In a climate dominated by heating, a desuperheater can save you as much as 80percent more than an ordinary water heater during the summer. This is because the desuperheater uses the energy that is emitted from the home during the cooling process and converts it to useful heat for the hot water generator. This allows the geothermal system to make domestic hot water for 3 to 5 months of the year at less than the cost of other energy sources.
The desuperheater also helps in winter when the geothermal system is operating at its lowest capacity. The device takes away the extra heat generated by the cooling system and then adds it to the domestic hot water tank. This allows the hot water tank to make use of the energy that is free and boosts the system’s heating capacity. The desuperheater could be used to reduce the amount of time the geothermal system is in operation in a climate with a high degree of heating.