Environmental heat energy
Alternative energy sources are becoming increasingly attractive. One reason is the continually rising prices of conventional fuels. Nature offers us numerous opportunities for eco-friendly and cost-saving heat production. Heat pumps use the energy nature gives us for free.
The ground in particular is a giant energy store. A few meters below the surface it stores the sun's heat. From within the Earth's core temperatures of 6,500 degrees Celsius radiate to its outer layers. Heat pumps make use of geothermal heat, or the heat from groundwater depending on the technology. The energy stored in the ambient air is also suitable for heating rooms and for producing hot water. Heat pumps can make use of this and therefore save heating costs dramatically.
No matter what technology is used: heat pumps operate efficiently even at low ambient temperatures. Up to 75 per cent of your heating needs can be obtained directly from the environment and for free. Only 25 per cent must be added in the form of electricity. Heat pumps are able to tap three different sources of heat depending on the technology.
The advantages of using environmental heat as an energy source:
- No CO2 emissions
- Inexhaustible source of energy
- Independence from external suppliers
- Low heating costs
Requirements for the use of environmental heat:
- Large radiators for a low temperature system
- Good insulation of the building
Heat pumps can use the energy from the ground. The delivery is achieved in two different ways. Either the heat close to the surface is used, where the year-round temperature is almost uniform. A surface collector installed as a heating coil at a depth of 1.5 m extracts heat from the ground.
Or, alternatively, heat recovery is possible with a space-saving geothermal probe. The geothermal heat is removed with special ground probes that go as far as 100 metres deep into the earth. The temperature is constant all year long, at about 10 °C, which is sufficient in order to harvest the heat.
The advantage of using geothermal heat:
- Good heat storage: all year round constant temperatures of 7-13 °C
Requirements for the use of geothermal heat:
- Large, open access land area (surface collector)
- Permission may be requiredLarge, open access land area (surface collector)
Energy source ambient air
Heat pumps can utilise the ambient air and make use of the stored energy for heating purposes. Our modern heat pumps operate economically to produce heating even with an outside air temperature of as low as -20 °C.
The advantages of using ambient air:
- Excellent availability due to free access to the energy source without retrofitting
- Permit free
- Lowest investment costs
- Particularly suitable for modernisation
Requirements for the use of ambient air:
- Installation site for the outdoor unit
Energy source: Ground
Heat pumps can draw heat from the groundwater. Its temperature is constant regardless of the season and the outside temperature. For the extraction of the groundwater a well is needed.
The advantages of using ground water:
- Very efficient
- Good heat storage: maintains a temperature of 7-12 °C on icy winter days
Requirements for the use of ground water:
- Quality and quantity of ground water: groundwater which is deficient in minerals and lime
The best source of energy for your purposes
Which energy source and therefore what type of heat pump system is best suited for your application depends on many factors. The different acquisition and operating costs are to be considered. But the individual heat pump species also differ from each other in terms of permits, promotion, and the requirements of the building.
There is no standard solution when searching for the right heat pump system. But it is not that difficult to find the system that fits your needs. Talk with your Vaillant heating specialists. They can assist you in planning the optimum heating system.
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Permits and subsidies
Whether you need a permit depends on the type of heat pump and your location.
Find out more about the regulatory requirements for heat pumps
In many cases you will be entitled to government assistance programmes that financially support your installation of a heat pump. Find out how you can enjoy the maximum funding.
Find out more about funding and saving money
This might interest you:
Heat pump technology
Available energy souces
How different technologies work