GeoCube ground source heat pumps work by absorbing heat that is naturally found in the ground, lakes or rivers. They then use a heat exchange process to convert it into energy efficient space heating and hot water.

Ground source heat pump technology is well-established and has been used for over 60 years to provide homes and commercial buildings with a sustainable source of heat.  The units absorb heat that is naturally found in the ground, lakes or rivers. They then convert it into energy efficient space heating and hot water.

How our ground source heat pumps work

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How a ground source heat pump works diagram
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Cold water anti-freeze mix absorbs energy in the ground and increases in temperature.

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The water passes into the evaporator heat exchanger.

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Heat energy from the water passes to the refrigerant which increases in temperature and changes to a gas.

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The gas enters the compressor and its temperature increases further.

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The hot gas passes through a condensor heat exchanger and heat is transferred to water on the other side.

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The high temperature water passes to the building’s heating circuit for use in hot water or space heating systems.

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The gas temperature decreases and it changes back to a cold liquid in the expansion valve.

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The refrigerant returns to the evaporator once again to be heated by water from the ground pipes.

1. A cold water anti-freeze mix is pumped around energy absorbing pipes in the ground and it increases in temperature.

2. The water then passes into one side of an evaporator heat exchanger. On the other side is a cold, low pressure refrigerant liquid.

3. As the refrigerant and water both pass through the evaporator’s coils remaining separate), heat energy from the water passes to the refrigerant. This causes the refrigerant to increase in temperature, and, due to its low boiling temperature, change to a gas.

4. The refrigerant gas then enters the compressor, where its temperature increases as a result of the compression process (much like a bicycle pump heats up during its use).

5. The hot refrigerant gas then passes to another heat exchanger – the condenser  and heat is transferred from the refrigerant to water on the other side.

6. This high temperature water is passed to the building’s heating circuit for use in hot water or space heating systems.

7. As the temperature of the refrigerant decreases, it is passed through an  expansion valve where the gas changes its state back to a cold liquid.

8. The refrigerant returns to the evaporator once again to be heated by water from the ground pipes.

9. This process is repeated to provide a constant temperature to the building.

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