Energy self-sufficiency is attracting interest in households, but the greatest impact will be achieved in municipalities and towns and cities. Energy self-sufficiency improves energy security and contributes to tackling climate change. In practice, increasing self-sufficiency in energy production means advancing towards a wiser energy system.
Energy self-sufficiency with source heat
Source heat is a form of energy that uses local heat sources and minimises the need to purchase energy. The waste heat in buildings is recovered by recycling the heat generated by people, the sun, lighting and electrical appliances. Extra heat is transferred primarily to premises with heating needs and secondarily to heat wells, where it is stored for future use. In a bright time, solar energy is used in energy production.
The underlying idea of source heat is to exploit heat sources generated by the property such as heat generated by the cooling of the premises, heat contained in wastewater, or the solar heat of artificial ice rinks and turf.
In the technical implementation of source heat, separate district heating and cooling networks are replaced by a single pair of pipelines called an heat bus. The heat bus enables low-temperature heat energy to be transferred in both directions between properties.
Source heat is the solution for carbon neutral properties
Heating energy is processed only in the properties to match the temperature levels they require, which means that the amount of energy loss through transfer is minimised. Cooling premises with the aid of source heat means advantageous lifecycle recycling of waste heat produced by properties by means of an heat bus, and utilising seasonal storage of excess heat in thermal wells in the ground.
During the summer, heat wells are loaded with solar heat coming in through the windows, utilising the heat collection system. Electricity consumed by the heat pumping system is produced by solar power, thereby reducing the need to purchase electricity. Solar electricity also produces part of the electricity used for lighting and appliances in the building. In the cold months, when the heat collection system does not provide sufficient heat, heat stored in the soil is used to heat the premises.
Source heat is intended to achieve an optimal solution for heating premises in an energy self-sufficient manner, as well as developing the solution to meet the energy needs of the buildings with local energy sources, which in practice means carbon neutrality.
Our aim is to use the source heat solution to contribute primarily to the energy efficiency of schools, outdoor artificial lawns and artificial ice, thereby implementing effective lifecycle solutions. Energy systems dimensioned on a case-by-case basis are more favourable in terms of purchased energy, operating and maintenance costs, and above all, energy self-sufficiency.