"If it's possible to heat groundsource water from 15 degrees to 50 or 60 degrees, we thought, why isn't it possible to heat water of 50 degrees to reach 60 or 70 degrees?" said Evgen Torhac of Nafta Geoterm.
With support for the cross-border, multi-sectoral partnership from the EUREKA Network, Nafta Geoterm drew together end-users, research institutions and manufacturing companies, based in Slovenia and Serbia. Many had worked together on projects since the days of the former Yugoslavia. As well as developing a heat pump for Lendava, they recognised the broader potential of their project: a new market for the wider exploitation of geothermal energy sources and waste industrial heat.
In Serbia, Zoran Stevanovic, head of the hydrogeology department in Belgrade University's faculty of mining and geology, wanted to be part of the project in order to develop technical expertise and promote green energy locally. Many Serbian towns have centralised heating networks and, although geothermal resources are plentiful and at much shallower depths than in Slovenia, they are largely underexploited. "Ground source heat in Serbia is most typically used for greenhouse space heating or balneology but could also be efficiently integrated into centralised heating systems and industrial processes," he explained.
To succeed, the pump would have to provide heat more cheaply than using fossil fuels, which was Lendava's fall-back option during cold weather periods. Maribor University's Laboratory for Thermal Energy managed the technical research, led by Professors Goricanec and Jurij Krope. They developed software to model the structure of heat pumps and the influence of different temperatures; and conducted simulations to assess the impact of different types of coolant on the pump's
|Contact: Piotr Pogorzelski|