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Geothermics - Pumps
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The water-to-water heat pumps, or in other words geothermal pumps, utilize the ground’s geothermal capacity, which is heat that is stored in the ground, and they convey it to the water of the underfloor heating or the hot water for the plumbing.
They can be combined with all geothermal systems (horizontal, vertical, open type) producing hot or cold water for heating or cooling, respectively. The high performance grade of geothermal pumps makes their use extremely economical and guarantees their non stop operation throughout the year.
ADVANTAGES OF GEOTHERMAL PUMPS
Geothermal pumps have many advantages, among which the high performance coefficient (COP up to 5.7), namely 1KW of consumed energy produces 5.7KW of useful energy. This means more economical operation compared to all conventional heating systems.
A geothermal pump fully replaces classic heating system (oil, natural gas boiler). It is supplied only with electricity and the same unit produces heating, cooling and warm water for the plumbing system.
The operation of the pumps is friendly to the environment, as they use R-410A cooling liquid and have zero emissions.
Finally, significant advantages of the geothermal pumps are their small size and their noise-free operation.
METHOD OF OPERATION OF GEOTHERMAL PUMP
The water-glycol mixture that is circulating in the geo-exchanger’s circuit absorbs energy from the ground and conveys it to the evaporator, which captures this energy. Through the evaporator it is conveyed to the pump’s cooling medium which is transformed from liquid to gas. The cooling medium, which is circulating inside a closed circuit, passes through the pressurizer, and it is pressurized in order to increase its pressure and its temperature to the desired value. After this it is conveyed to the condenser and it rejects all the heating it has stored in the water of the underfloor heating circuit. The cooling medium is conveyed to the discharge valve and it is discharged, so it can be returned to the evaporator to repeat the same procedure.
The cooling operation follows the reverse procedure.
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