Geothermal HVAC
Geothermal is a system that can provide cooling and heating. The temperatures of the earth below the surface are pretty constant all year.
Geothermal systems consist of a heat pump, underground loops and a distribution system (such as air ducts). Find out more about the various components of this energy-efficient system:.
Ground Loop
The Ground Loop is essential to the durability and efficiency of geothermal cooling and heating system. It is comprised of pipes that are either trenched or drilled in the backyard and connected to your home’s heat pump. The pipes are then filled with a solution containing water that circulates to absorb or disperse heat according to the requirements of your home. The temperature of the ground is constant between four and six feet below the surface, making it an ideal energy source for a geothermal system.
When the system is heating, the liquid used to transfer heat absorbs heat from the earth. It then transfers that heat to the heating pump in your home. The fluid is then pushed into the loop, which then starts to circulate. In cooling mode, the system utilizes the opposite process to eliminate the excess heat and return it to the loop, where it begins the next cycle.
In a closed loop system, the piping is filled with a water-based product and placed in the ground. The solution is safe and non-toxic to the environment, and it doesn’t pollute the water supply in underground. The system can use a pond, lake or other body of water to provide heat transfer fluid. This is even more green.
Based on the space available, closed and open systems may be installed horizontally or vertically. The vertical system requires fewer trenches than a horizontal one and is less disruptive to your landscaping. It is used in areas in which soil depths are low or where existing landscaping needs to be maintained.
It is crucial to choose a reliable installer, regardless of the type of system. It is essential to have a reliable and well-designed system as geothermal systems use a lot of energy. A properly installed system will ensure the longevity of your system and help you save money on electricity in the long run. It is important to flush the system on a regular basis to eliminate any minerals which could affect the efficiency and flow of the liquid used to transfer heat. A GeoDoctor expert can help you select the best system for your home.
Vertical Loop
Geothermal energy originates from the Earth and is utilized to cool or heat buildings. It is a source of energy that can be harnessed using underground loops which absorb heat and then transfer it to your building. The most commonly used kind of geothermal system is known as vertical ground loop. This kind of system is commonly used in residential and commercial applications. The heat pump in this system absorbs the thermal energy from the ground and transfers it to your home or office. In summer, it reverses to provide cooling.
The pipes that are buried store the thermal energy that is transferred from the earth to your building. These pipes are a crucial element in any geo-thermal hvac system. The pipes are made of Polyethylene with high density and circulate water as well as propylene glycol which is food-grade antifreeze. The temperature of the soil or water remains fairly constant at only a few feet beneath the surface. The closed loop geothermal system is more efficient than other heating methods like gas boilers and furnaces.
These loops can be placed in a horizontal trench or put into boreholes dug to a depth of 100 to 400 feet. Horizontal trenches work best for large estates with lots of land, whereas vertical boreholes work well for homes and businesses with limited space. The process of installing horizontal ground loops entails digging extensive trenches that can take a lot of time and effort. In addition the ground has to be compacted to ensure that the loops have a strong hold on the soil.
A vertical loop system is much more straightforward to install than a horizontal field. The technician drills holes that are 4 inches in diameter spaced 20 feet apart. He then installs the pipe to form a closed circuit. The number of holes required will depend on the building’s dimensions and energy requirements.
To keep your geothermal cooling and heating system operating at peak performance, it is important to properly maintain the loop fields. This includes cleaning up debris and conducting regular tests for bacteriological health.
Horizontal Loop
Geothermal heat pumps transfer energy between your home, the ground or a nearby body water instead of the air outside. This is due to the fact that ground and water temperatures remain relatively stable, unlike the fluctuating temperature of outdoor air. There are four main kinds of geothermal heating loops, and which one you use will depend on the size of your property and layout. The type of loop that is used and the method of installation determine the effectiveness and efficiency of your geothermal system.
Horizontal geothermal systems make use of series of horizontal pipes, which are that are buried in trenches ranging from four and six feet in depth. The trenches are designed to hold three to four pipe circuits. The pipe circuits are connected into a manifold which is the central control unit of the geothermal heat pumps. The manifold then delivers hot and cool water to your home’s heating and cooling ductwork.
Initially, these piping systems were installed in vertical trenches, which required a larger area of land to cover them. As technology advanced, it was found that layering a single pipe back and forth different depths in smaller trenches could help reduce the amount of space needed and also costs without sacrificing performance. This is the reason for the “slinky” method of installing horizontal geothermal loops.
In situations where there’s not enough land, a vertical ground loop can be an ideal alternative. It can also be an option for homes located in urban areas in which the topsoil is scarce and there is little if any room for horizontal loops. If your home is in an earthquake-prone region and is unable to support an horizontal loop system, a vertical loop system could be the best choice.
A geothermal lake or pond heat pump can be the best option for your home when you have access to an ample amount of water. This kind of system functions the same as vertical or horizontal ground loop geothermal heat pump however, the water is used for heating and cooling, instead of the earth. Remember that a geothermal loop system that utilizes lakes or ponds cannot function in the event of a power failure. Installing a backup generator can provide power during this time.
Desuperheater
Geothermal heating and cooling is a very efficient alternative to traditional methods. When it comes to switching homeowners must consider balancing upfront costs and total savings on energy. There are many factors to consider, including the soil composition and the local climate. One of the most important choices is whether to plant ground loops or install an external hot water tank. The latter is cheaper, but it may not provide as much efficiency.
A desuperheater is a device that transfers heat from a geothermal heating system to your domestic hot water tank. It is designed to work during winter, when the cooling cycle of the system generates excessive heat. The desuperheater utilizes this heat to increase the heating efficiency of your home. It can also cut down on your energy usage by utilizing existing resources.
The optimal design of a desuperheater is dependent on several physical geometric, thermal, and factors. These include the spray water temperature, the angle of injection, as well as the design of the nozzle. These are all elements that affect the performance and efficiency of the desuperheater.
During the summer, desuperheaters can save up to 80 percent more in a climate that is dominated by heating than a conventional hot water heater. The desuperheater converts the energy removed from the house through cooling into heat for the hot-water generator. Geothermal systems can provide domestic hot water for 3 to 5 months of the year at a fraction the cost of other energy sources.
The desuperheater can also help in winter when the geothermal system is operating at its lowest capacity. The device eliminates the excess heat produced by the cooling system and transfers it to the domestic hot water tank. This allows the domestic hot water tank to use this free energy, and maximizes the heating capacity of the system. The desuperheater can even be used to decrease the time that the geothermal system is in operation in a climate with a high degree of heating.