Geothermal HVAC
Geothermal is a dual-purpose system that can provide both cooling and heating. The temperatures of the earth below the surface are fairly constant throughout the year.
A geothermal system consists of a heat pump, underground loops and a distribution system (such as air ducts). Learn more about the different parts that make up this energy-efficient system:.
Ground Loop
The Ground Loop is the key to a geothermal system’s efficiency and longevity. It is comprised of pipes that can be drilled or slit in the yard to connect with your home’s heat pumps. The pipes will be filled with water-based solution and circulated to absorb or distribute heat based on the needs of your home. The temperature of the ground is relatively constant between four and six feet below surface level, making 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 transfers that heat to the heat pump inside your home. The fluid is then moved into the loop where it starts circulating again. In cooling mode, the system utilizes the opposite method to eliminate the excess heat and return it to the loop where it starts another cycle.
In a closed loop system the piping is filled with a water-based solution, and then buried in the ground. The solution is safe for the environment. It doesn’t pollute the water supply in underground. The system can use the pond, lake or any other body of water to provide heat transfer fluid. This is also environmentally friendly.
Both closed and open systems can be vertical or horizontal according to the space you need. Vertical systems require less trenches and cause less disturbance to your landscaping than horizontal systems. It is used in areas in which soil depths are low or when existing landscaping needs to be maintained.
It is crucial to choose an experienced installer regardless of the kind of system. It is important to have a well-functioning 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 also crucial to flush the system regularly to remove any mineral buildup. This can reduce the flow of heat transfer fluid and reduce the efficiency of the system. A GeoDoctor expert can assist you to determine the best system for your home.
Vertical Loop
Geothermal energy comes from the Earth and is utilized to cool or heat buildings. The energy is harnessed using underground loops that absorb the thermal energy and transmit it to your building. Vertical ground loops are the most commonly used geothermal system. This kind of system is commonly employed in commercial and residential applications. The heat pump in this system absorbs the heat energy from the ground and transfers it to your office or home. In the summer, it works in reverse to provide cooling.
The heat energy that is transferred from the ground to your house is stored in a network of buried pipes. These pipes are a crucial part of any geo-thermal HVAC system. The tubes are made of high-density polyethylene and circulate a mixture of propylene glycol and water which is a food grade antifreeze through the system. The temperature of soil or water is almost constant just a few feet beneath the surface. The closed loop geothermal system is more efficient than other heating methods, like gas boilers and furnaces.
The loops can be installed in the horizontal direction of a trench or placed into boreholes that are drilled from 100 to 400 feet deep. Horizontal trenches are usually used for larger homes with a lot of available land and vertical boreholes are ideal for homes or businesses that have limited space. Installing a horizontal ground loop involves digging trenches that can require a lot of time and effort. The ground must be compacted to ensure that the loops are firmly fixed to the soil.
On the other hand, a vertical loop system can be set up quicker and with less effort than a horizontal loop field. The technician digs holes that are 4 inches in diameter spaced about 20 feet apart. He then connects the pipe to create a closed circuit. The number of holes needed will depend on the building’s size and the energy requirements.
To ensure that your geothermal cooling and heating system operating at peak performance it is crucial to properly maintain the loop fields. This includes cleaning the loop fields as well as performing periodic bacteriological tests.
Horizontal Loop
Geothermal heat pumps transfer energy between your house and the ground or a nearby body of water, instead of from the outdoor air. This is due to the fact that temperatures in the ground and in the water remain relatively stable, compared to the fluctuating outdoor temperature. There are four major types of geothermal heating loops, and the one you use will depend on your property size and layout. The type of loop you choose and the method of installation used determine the effectiveness and efficiency of your geothermal heating system.
Horizontal geothermal systems employ series of horizontal pipes, which are that are buried in trenches ranging from four and six feet deep. The trenches can accommodate up to three pipe circuits. The pipe circuits are connected to a manifold, which is the central control unit. The manifold is a conduit for heated or chilled water into your home’s heating or cooling ductwork.
Originally, these piping system were placed in vertical trenches that required a larger expanse of land to surround them. As technology improved it was discovered that laying a single, longer pipe back and forth various depths in trenches that were smaller could decrease space requirements and costs without losing performance. This led to the creation of the “slinky method” of installing horizontal geothermal circuits.
A vertical ground loop system is an excellent alternative to a horizontal geothermal heat pump system for situations in which there isn’t enough land available. It’s also a great alternative for homes situated in urban areas in areas where the topsoil layer is thin and there isn’t much space for horizontal loops. Vertical loops can be a good option if your property is in an earthquake-prone area and is not able to support an horizontal loop.
A geothermal pond or lake pump system can be the ideal option for your home if you have access to an abundance of water. This type of system works exactly like vertical or horizontal ground loop geothermal heat pump, however, the water is used for heating and cooling instead of the earth. It’s important to remember that a system that utilizes lakes or ponds is not functional in the event of a power failure. Installing a backup generator will supply electricity during this time.
Desuperheater
Geothermal heating is a reliable alternative to conventional methods. When it comes time to switch homeowners must consider balancing upfront costs and total savings on energy. There are a myriad of aspects to consider such as the local climate and soil’s composition. One of the most important decisions is whether or not to dig ground loops, or install an external tank for hot water. The latter option is cheaper, but it might not offer as much efficiency.
A desuperheater transfer heat from a geothermal heating system to your home hot water tank. It is designed to work in the winter when the cooling cycle of the system generates excess heat. The desuperheater utilizes this heat to improve the heating efficiency of your home. It can also cut down on your energy usage by using existing resources.
The optimal design of desuperheaters is determined by several physical, geometric, and thermal variables. These include the angle of injection, the temperature of the water spray, and the nozzle’s design. These are all aspects that affect the performance and operation of the desuperheater.
In a climate dominated by heating, a desuperheater will save you as much as 80% more than an ordinary water heater during the summer. This is due to the fact that the desuperheater utilizes the energy emitted by the home during the cooling process and converts it into useful heat for the hot water generator. This enables the geothermal system to create domestic hot water for 3-5 months of the year, at less than the cost of other energy sources.
The desuperheater can also help in winter when the geothermal system is running at its lowest capacity. The device can add the additional heat produced by the cooling system to the domestic hot water tank. This allows the hot water tank to use this energy free of charge and increase the heating capacity of the system. The desuperheater is a great way to reduce the amount of time geothermal heating systems are being used when it’s in a climate that has a large demand for heating.