Low-Enthalpy Above-Ground Geothermal and Allied Technologies - A Research Agenda

Abstract

Low enthalpy resources can be converted into electricity using well proven Organic Rankine Cycle (ORC) technology, which has been widely adopted as the preferred technology for converting low temperature geothermal and waste heat resources into electricity. New Zealand is fortunate to have a highly accessible geothermal resource, a significant history in geothermal technology development and a capable heavy engineering fabrication and manufacturing industry. These attributes, combined with a fast emerging low enthalpy export market, provide an ideal basis for NZ industry to expand its product offerings in ORC technology. The New Zealand Heavy Engineering Research Association (HERA) has been working with industry partners and research providers to develop above ground technology solutions for this market, specifically targeting low enthalpy geothermal and waste heat resources for effective conversion into electricity using ORC technology. This activity has highlighted the need for a structured approach to above ground geothermal and allied technology research and development, which industry and partners have been working to establish. This paper addresses the issues, options and challenges faced in progressing an Above Ground Geothermal and Allied Technology (AGGAT) research agenda.