Energy Transition: the Potential of Geothermal Energy Use Through Industrial Symbiosis in New Zealand
Samantha ALCARAZ, Brian CAREY, Peter HALL
[Geological and Nuclear Sciences Ltd, New Zealand]
New Zealand electricity generation is currently around 80% renewable, however electricity represents only about 25% of consumer energy demand. The majority of the other energy demand is used for transport and process heat sourced from fossil fuels. An opportunity to promote renewable energy use and reduce dependence on energy imports exists in the process industry. This paper presents the outcomes of the New Zealand government-funded project “Wood Energy Industrial Symbiosis”. Industrial symbiosis engages traditionally separate industries, clustering in a collective approach, for advantage. Wastes and by-products from one facility can become the raw material for another. Potentially available energy resources have been used to identify opportunities where industrial heat might be supplied from renewable geothermal or woody biomass energy sources. Woody biomass is widely available in New Zealand and under-utilised, and there is also significant potential to increase the use of geothermal energy. Additionally energy from geothermal can free up wood waste feed stock that might otherwise be burnt in a bio-mass boiler opening up other potential revenue streams. Opportunities vary by region; based on the wood supply, existing wood processing demand, geothermal resource location and non-forestry industrial heat demand. Potential expansion of wood processing is part of the analysis, along with fossil fuel displacement. Mapping the co-location of industrial heat consumers with the two key energy sources identifies opportunities that can contribute to the renewable energy transition that is occurring in the New Zealand’s process heat sector.
|        Topic: Sustainability and Climate Change||Paper Number: 05002|