Heating is the largest end user of energy, accounting for over 50% of global final energy consumption worldwide. At present, much of this demand is met by burning fossil fuels, making the sector a significant contributor to greenhouse gas emissions and air pollution. Renewables can play a significant role in decarbonising the way we heat homes and businesses.
Traditionally, biofuels have been the main alternative to fossil fuels in district heating and cooling. However recent improvements in building insulation and digitalisation have opened district energy to widely accessible, low-temperature renewables such as low-temperature geothermal, solar thermal and waste heat sources.
These sources are widely available in many regions. Yet, they remain largely untapped because they are not immediately compatible with current district energy infrastructure and existing building stock according to IRENA’s “Integrating Low-Temperature Renewables in District Energy Systems” published in collaboration with Aalborg university, Denmark.
Speaking during a recent workshop to launch the report, Miklos Antics, the President of the European Geothermal Energy Council, said more than 25% of the EU population lives in areas directly suitable for geothermal district heating.
The workshop was held under the framework of the Energy Solutions for Cities of the Future and under the umbrella of the Global Geothermal Alliance, with a focus on China with the support of the Chinese Renewable Energy Engineering Institute (CREEI). “District heating is of utmost importance to achieve decarbonised energy systems in China by 2060,” said Professor Brian Vad Mathiesen from Aalborg University.
For his part, Haukur Hardarsson, Chairman and Founder of Arctic Green Energy, highlighted the fact that Sinopec Green Energy connected about 60 million square meters of floor area to geothermal district heating systems, saving the country and the world close to 13 million tons of CO2 over the last decade – showing the environmental value of geothermal energy for heating and cooling.