Other author Rafferty, Kevin D. Subject Ground source heat pump systems. Heat pumps -- Design and construction. ISBN hardcover : alk. Kavanaugh, Stephen P. UniM ERC. Physical description.
Introduction to ground source heat pumps -- equipment for ground source applications -- fundamentals of vertical ground heat exchanger design -- applied ground coupled heat pump system design -- surface water heat pumps -- piping and pumps for closed-loop ground source heat pumps -- hydrology, water wells and site evaluation -- ground water heat pump system design -- GSHP performance and installation cost.
Rafferty, Kevin D. Ground source heat pump systems.
Good design is critical to GSHP performance
The open-loop system uses underground water to extract the heat and transfer it through a heat pump. The closed-loop system uses the ground to extract the heat and transfers it through the piping connected to the indoor heat pump system. The closed-loop systems can also be of several different types. At an approximate depth of one to two metres, the ground source heating system is installed in horizontal channels. It is suitable for properties that have more available land, such as suburbs or rural areas.
The size of the required territory for the horizontal system installation is determined by several factors, such as heating and cooling capacity of your house, depth at which the heat pump will be installed, type of soil, the climate and heat pump efficiency. For the average house of square metres, the required space should be between and square metres.
Vertical geothermal pumps are more suitable for suburban homes with the limited space.
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For this reason, they can be more expensive than the horizontal system. A vertical hole is drilled at least 6 metres deep in the ground, and the entire piping of the heat pumps system will go 50 to metres deep, depending on the amount of heat required for your house and the soil structure. Another type of heat pump system is a closed pond loop system. However, it is not as popular as horizontal or vertical systems.
It can be more complicated because it requires close access to a water source. In this case, an open loop system is more appropriate. However, a closed pond loop is beneficial if the quality of water is poor and it isn't suitable for an open loop system. In comparison to air source heat pumps and conventional heaters, ground source heat pumps are more expensive, but this initial cost is paid off by the savings on future energy use.
The operational costs will also vary depending on the size of your house and the degree of insulation. Another factor that can influence the price of the ground source heat pump is whether or not new radiators or underfloor heating systems are also required. The installation price of a geothermal heat pump will also greatly depend on which type of a system you decide to install.
The difference in price between vertical and horizontal heat pump systems is quite significant. The horizontal system is more affordable, but it requires a large area for the system installation half an acre minimum. The numbers provided in the table above are ball park figures to give you an idea.
The actual price will depend on every specific project.
In the table below we have provided approximate numbers which represent the amount of money that you can save on energy bills and the reduction of carbon dioxide use with a ground source heat pump. As you can understand, the savings you will see depend on your a great many factors. All the systems listed in the table are non-condensing which are most likely to be replaced in the majority of households.
Geothermal Heat Pumps | Department of Energy
Geothermal heat pumps use the constant temperature of the ground to save energy and increase the seasonal efficiency of heating. They operate using solar energy heating up the underground water which provides a constant temperature of the ground. GSHPs use electricity to generate the heat. COP is a coefficient of performance which is used to measure the efficiency of a ground source heat pump. For example, a ground source heat pump that can generate 4 kW of heat per one kilowatt of electricity has a COP of 4.
Although the installation of ground source heat pumps require some land available, it does not mean that you will need several acres of land. Even an average garden can serve as a source for a heat pump.
Ground source heat pumps are one of the most energy-efficient heating systems. As mentioned before, geothermal heat pumps use electricity to produce the heat. If you want to be even more environmentally-friendly and reduce carbon emissions, you can combine your heat pump system with a renewable energy source. For example, by integrating solar panels, you can have a system completely carbon neutral. If you decided to have a ground source heat pump installed on your property, you would get either a vertical or horizontal loop system.
The most suitable system for your home will be offered based on the size of your house and land, and the building requirements. First of all, the ground should be adapted for the installation of the system by digging up the loop fields. For the installation of a vertical ground source system, the wells should be drilled deep into the ground in which the loop will be placed.
Next, the installation of the heat exchanger which will hold the heat from the ground is required.
Ground-Source Heat Pumps (Earth-Energy Systems)
The installation of a horizontal system does not require digging deep into the ground. Instead, a large piece of land for the loops installation should be dug up. Ground source heat pumps are a reasonable and beneficial investment. Therefore, if you decided to use it as your heating system, you will need to find the right company who will professionally install the heat pump system and guarantee high quality. Last Updated on January 20th, If you have a provable track record of quality work and satisfied customers , we'd like to hear from you.
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