| Abstract |
Low enthalpy geothermal resources remain underutilised in New Zealand, largely due to limited awareness of their diverse applications and because they are overshadowed by the high temperature systems that exist. To elevate the profile of low enthalpy geothermal, we developed a framework to present their potential strategic uses to stakeholders. The genesis of this framework evolved while completing a comprehensive investigation into the geoheat potential of the Tauranga Geothermal System (TGS), commissioned by the Bay of Plenty Regional Council in 2024. The TGS underlies the Western Bay of Plenty, it spans approximately 875 km² from Waihi Beach in the North to Te Puke-Maketu in the Southeast, the TGS is a low-temperature, single aquifer system with temperatures ranging from ~15°C to ~70°C, with 70% of consented wells less than 200m deep. These temperatures have good potential as geoheat, defined as the use of geothermal energy for heating purposes, either directly or indirectly using heat pumps. This investigation’s methodology adopted a holistic approach, combining technical assessments of groundwater and geothermal resources with stakeholder consultation on current practices, regional economic trends, advancing technological developments, management implications, and alignment with regional growth strategies. The outcome was a public document that effectively communicates how greater regional geoheat use can address multiple public challenges, such as supporting regional economic development, reducing greenhouse gas emissions, and enhancing energy security in the rapidly growing region. By effectively communicating these multifaceted benefits, geoheat’s profile is rising in the region, now being included in public discussions and local agency strategies. |