5.5 use of heating in buildings and industry
Renewable energy sources currently supply 54% of the demand for energy in the form of heat, mainly derived from the use of biomass. In the Energy [R]evolution scenario, renewable energy sources would supply 58% of the demand for heating in 2030 and 81% in 2050, due primarily to:
• Energy efficiency measures aimed at reducing the future demand of primary energy for the supply heating by 25%, in relation to the reference scenario.
• Substitution of heating systems that use fossil fuels with solar collectors, biomass, biogas and electricity in the industrial sector;
• Transition from use of coal and oil to natural gas in conventional applications.The emissions of CO2 from natural gas is significantly lower than other fossil fuels.
In the Energy [R]evolution scenario, 1,485 PJ per year are saved in 2050—25% as compared to the reference scenario.
Figure 5.6 shows the development of energy sources for heating over time. Biomass will continue with the largest share in renewable sources. After 2020, the growth of solar collectors for water heating and the use of geothermal energy will reduce dependence on fossil fuels.