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• Municipal Geothermal Systems: Evaluation of Three Hungarian Cases

  81-93

  Krisztián Szolga

  István W. Árpád

  Dénes Kocsis

  Views:

  122

  Geothermal energy holds great potential for a sustainable future, as it is a clean and weather-independent form of energy. In addition to energy production, it can also serve the population of a region through direct use. In this paper, three municipal geothermal systems (Szarvas, Nagyszénás, Békéscsaba) in the same Hungarian region which have been recently installed or expanded are presented and analysed. Here, the direct usage of geothermal energy for heating purposes is a very important issue. The three systems show several differences and to some extent face different challenges in the various phases of the projects. Particular attention has been paid to engineering solutions to the problems that arise. The challenges, such as technical difficulties during installation, maintenance difficulties, or problems arising during operation are introduced. The strengths, weaknesses, opportunities, and threats of similar geothermal systems were summarized, based on the relevant literature. These points were evaluated by their appearance and characteristics in the examined systems. This study aims to provide insights, based on recently gained experiences, into geothermal projects, thus providing feedback and practical information for researchers and practitioners.

• Geothermal energy utilization in the Bükkalja region by reusing abandoned hydrocarbon wells

  351-357

  Dávid Bretán

  Péter Szűcs

  Rita Miklós

  Csaba Ilyés

  Views:

  292

  Hungary is a country in an inactive volcanic area, but with a geothermal potentical recognized bot hat European and international level. The geothermal gradient of the country is ~ 45°C/km on avarage, while in other countries it is ~ 20-30 °C/km. Accordingly, the temperature can reach 55-60°C at 1 km and 100-130°C at depths of 2 km. There are many types of extraction and utilization of geothermal energy, of which a large group is energy recovery . This direction is not typical in Hungary, so it is worth developing. The developement of the sector is slow due to high initial invertment demand and the long planning phase. On the one hand, the aim of our reserach is to take steps to remedy this problem by examining the funcion change of a barren well. Int he foreground and peripheral areas of the Bükk Mountains, there are numerous unused hydrocarbon wells, which our work is examining for energy purposes with a view to their later utilization. The present study focuses on 13 abandoned wells in the Pünkösd Mountain, area of Bükkalja, Demjén.