Variable Refrigerant Flow System
Renewable energy is sustainable energy that comes from the natural environment. We can obtain it from the sun (solar energy), from water (hydropower), from wind (wind turbines), from hot dry rocks, magma, hot water springs (geothermal) and even from animal manure, crop residue and waste (biomass). Renewable energy sources are environmentally-friendly because they don’t create CO2 emissions and stimulate climate change.
The amount of the energy captured by heat pumps is considered to be a renewable energy, since aerothermal, geothermal and hydrothermal heat energy is used in heating, cooling and hot water supplies.
Even at temperatures that we consider to be cold, air, ground and water contain useful heat that's continuously replenished by the sun. By applying a little more energy, a heat pump can raise the temperature of this heat energy to the level that it can be usable.
Heat pumps as renewable energy sources (EU RES-Directive and Heat Pumps)
Heat pumps use renewable energy sources, namely energy found in the air (aerothermal), ground (geothermal), and water (hydrothermal). In the EU RES-Directive, the European Commission and Parliament document measures for promoting the use of renewable energy resources (2009/28/EC) as covered below:
- Solar energy
- Geothermal energy
- Aerothermal energy
- Hydrothermal energy
- Ocean energy
- Landfill & Sewage treatment gas
“aerothermal energy” = heat in the ambient air
“geothermal energy” = heat beneath the surface of solid earth
“hydrothermal energy” = heat in surface water