Heat pumps operate on the fact that the earth beneath the surface remains at a constant temperature throughout the year, and that the ground acts as a heat source in winter and a heat sink in summer.
The earth’s surface acts as a huge solar collector, absorbing radiation from the sun. In this country the ground maintains a constant temperature between 11oC and 13oC, several metres below the surface. Heat pumps take advantage of this by transferring the heat stored in the earth or in ground water to buildings in winter and the opposite in summer for cooling.
For every unit of electricity used to operate the heat pump, up to four units of heat are generated. Therefore for every unit of electricity used to pump the heat, 3-4 units of heat are produced.
Ground source heat pumps use a 'closed loop' system of water/anti-freeze to collect the soil heat.
Installation in the Home
The system has three main components: a series of pipes in the ground, a heat pump and a heat distribution system. Lengths of plastic pipes are buried in the ground, either in a borehole or a horizontal trench near the building to be heated or cooled. Fluid, normally water with anti-freeze, absorbs or emits heat to the soil, depending on whether the ambient air is colder or warmer than the soil. In winter, the heat pump removes the heat from the fluid, upgrades it to a higher temperature for use in the building, typically in under-floor heating.
Payback and Maintenance
The initial capital costs of installing a geothermal heat pump system is usually higher than other conventional central heating systems. The system is among the most energy efficient and cost effective heating and cooling systems available.
Typically, 3-4 units of heat are generated for every unit of electricity used by the heat pump to deliver it, and the payback is typically about 8-10 years. The life expectancy of the system is around 20 years. Once installed a heat pump requires very little maintenance and anyone installing a heat pump should speak with their installer regarding a maintenance agreement. Heat pumps operate optimally when a system design approach is taken. It is important that the heat collector and heat distribution systems are correctly sized/installed.
Our new soil, rock, sea or ground water heat pump IVT Greenline HE is equipped with the latest generation of low-energy circulation in both cold and hot side. This means that electricity consumption is further reduced giving you even lower heating costs.
The heat pump has a new design and new control equipment with the same proven technology as the IVT Greenline HT Plus. IVT Greenline HE is that the C-model with built-in water heater of 185 liters or as E-model with separate processors, ideal for low ceilings or larger hot water demand.
5 quick questions about the IVT Greenline HE:
•Complete solution for both heating and hot water.
•Retrieving energy from the earth, mountain, lake or groundwater.
•Modulating Pump means that the pump only provides the heat that the house requires and saves electricity costs.
•High Scop means high savings amd high efficiencies.