Tamás Medgyes

• Chief Operations Officer at District Heating Company of Szeged

This study introduces a robust methodology utilizing Multi-Criteria Decision Analysis (MCDA) combined with an Analytic Hierarchy Process (AHP) to repurpose abandoned hydrocarbon fields for energy storage, supporting the transition to renewable energy sources. We use a geostatistical approach integrated with Python scripting to analyze reservoir par...

This study introduces a robust methodology utilizing Multi-Criteria Decision Analysis (MCDA) combined with the Analytic Hierarchy Process (AHP) to repurpose abandoned hydrocarbon fields for energy storage, supporting the transition to renewable energy sources. We use a geostatistical approach integrated with Python scripting to analyze reservoir pa...

The article highlights the importance of matching the requirements set by the heat consumer to the geothermal energy source. Quantitative assessments of the increase in the share of geothermal energy obtained directly from a heat exchanger due to the reduction of temperature requirements were made. The calculations were made base on the self-develo...

Geothermal energy has emerged as an alternative heating source that can replace fossil energy. This mature technology is already in use all over Europe, but there are significant differences in its use between European countries. One possible explanation for this phenomenon concerns societal differences directly related to geothermal energy, the to...

One of the major challenges regarding energy transition is to create active support towards renewable energy installations on a local level. The CROWDTHERMAL project presents practical approaches for involving local stakeholders in different measures in order to develop acceptable solutions. Based on technical evidence and data from concrete case s...

This paper describes the results of the CHPM2030 research project, which was running in the period 2016-2019. It was funded through the European Commission Horizon 2020 programme with the aim to develop a novel and potentially disruptive technology solution that can help satisfy the European needs for energy and strategic metals in a single interli...

Tungsten leaching potential from geothermal reservoirs was investigated using a flow-through reactor with the characteristic physical properties of a geothermal reservoir. Tungsten minerals were tested at 200°C, 250°C and 300°C, and 0.5 and 1.0 mL/min flow rates to determine the most favourable conditions for the mobilisation of tungsten. In situ l...

Geothermal energy utilization does not depend on weather conditions. Among the various types of heat supplies, ground source heat pumps are the most widely used in the geothermal sector; however, their utilization rate is considerably less than the growth rate of other renewable energy sources. This paper reports an overview of a deep borehole heat...

Each country in the pilot area has investment plans for developing new geothermal utilisations. The largest volume of these investments is related to the development of the district heating system in the Szeged, Hungary. Given the excellent geothermal potential of the area, the new management of the Szeged District Heating Company (SZETÁV) has outl...

Combining geothermal energy utilization with the extraction of metals in a single interlinked process offers a way to improve the economics of engineered geothermal systems. Here we describe laboratory experiments used to assess the effectiveness of a range of leaching fluids by quantifying metal release from various mineralised rocks. The main fin...

The H2020 project “Combined Heat, Power and Metal extraction” (CHPM2030) aims at developing a novel technology which combines geothermal energy utilisation with the extraction of metals in a single interlinked process. In order to improve the economics of geothermal-based energy production, the project investigates possible technologies for the exp...

The District Heating Company of Szeged supplies heat and domestic hot water to 27,000 households and 500 public buildings in Szeged. In 2015, the company decided to introduce geothermal sources into 4 of its 23 heating circuits and started the preparation activities of the development. Preliminary investigations revealed that injection into the san...

Due to advantageous conditions thermal wells have been operated in Hungary for over 140 years. With approximately 50 production wells in HódmezoA˝vásárhely and Szentes the largest operating geothermal fields are situated in the Southern part of the Great Hungarian Plain. Their total installed thermal power capacity exceeds 100 MWth, however, less t...