5.5 heating supply
Renewables currently provide 41% of New Zealand’s energy demand for heat supply, the main contribution coming from the use of biomass. The lack of district heating networks is a severe structural barrier to the large scale utilisation of geothermal and solar thermal energy. In the Energy [R]evolution scenario, renewables provide 67% of New Zealands total heat demand in 2030 and 94% in 2050.
- For direct heating, solar collectors, biomass/biogas as well as geothermal energy are increasingly substituting for fossil fuel-fired systems.
- The introduction of strict efficiency measures e.g. via strict building standards and ambitious support programs for renewable heating systems are needed to achieve economies of scale within the next five to ten years.
Table 5.2 shows the development of the different renewable technologies for heating in New Zealand over time. Up to 2020, biomass will remain the main contributor of the growing market share. After 2020, the continuing growth of solar collectors and a growing share of geothermal heat use will further reduce the dependence on fossil fuels. In addition, market share of efficient heat pumps will continuously grow and partly substitute direct electric heating.