Fuellers Advantage – Wednesday 18 March 2026

‘Closed-loop Advanced Geothermal Systems: Possibilities in the UK and internationally’

Professor Tassos G. Karayiannis

Centre for Energy Efficient and Sustainable Technologies

Brunel University of London

Wednesday 18 March 2026

National Liberal Club, 1 Whitehall Place, London SW1A 2HE

1800-2100

The next Fueller’s Advantage is being held on Wednesday 18 March at the National Liberal Club when Professor Tassos G. Karayiannis will speak on possibilities for closed-loop advanced geothermal syatems.

Fuellers Advantage is a series of technical meetings, held jointly by the Worshipful Company of Fuellers with the Energy Circle of the National Liberal Club.

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Images courtesy of National Geothermal Centre

SUMMARY OF PRESENTATION

Climate change and energy market volatility have catalyzed an increased interest in geothermal energy, and in particular the development of deep-borehole heat exchangers (DBHE), a potentially cost-competitive technology referred to as Advanced Geothermal Systems (AGS), for heat-to-heat applications and electricity generation. The presentation will cover thermal modelling and practical possibilities of AGS consisting of co-axial DBHEs and U-shape systems, with the latter having a number of horizontal laterals. The effect of geological properties and the thermal gradient, the water mass flow rate, the water temperature at the inlet to the well and geometrical parameters like diameter of the borehole and depth will be examined using an in-house software package. The performance of the wells will be assessed in terms of thermal output, outlet temperature and pumping power over a 30-year operational period. Geological conditions of the UK and other overseas locations with higher thermal gradients will be included in the analysis.

Tassos Karayiannis is Professor of Thermal Engineering, Leader of the Two-Phase and Heat Transfer Group and Director of the Energy Efficient and Sustainable Technologies Research Centre of Brunel University. The research Centre currently involves the work of ten academics carrying out fundamental and applied research in various aspects of highly efficient, sustainable and low-carbon thermal-environmental systems. Professor Karayiannis carried out fundamental and applied research in heat transfer and renewable energy including hydrogen generation. He carried out extensive experimental and modelling work in pool boiling heat transfer with plane and enhanced surfaces and is involved in the study of flow boiling and spray cooling. This work involves fundamental studies as well as research leading to the design of integrated thermal management systems for cooling electronics and other high heat flux devices. His work in renewable energy systems included aspects of solar energy and recently extensive fundamental and applied studies in geothermal energy. He has published more than 300 chapters in books, papers and industrial reports. He is a Fellow of the EI and the IMechE, Member of the Assembly for International Heat Transfer Conferences, the Chairman of the UK National Heat Transfer Committee and has served as the president of the UK Heat Transfer Society.

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PRICE
£24 per person.

BOOKING PROCESS
Booking is done via the National Liberal Club's website.
PLEASE NOTE: You will first need to register for a Guest Account, after which you will then be able to register and pay.
If you experience any problems then please contact their events team on 02079680919 and they will be able to assist you.

TIMINGS

• 1800     Registration, light buffet
• 1845     Introductions
• 1850     Professor Tassos G. Karayiannis: "Closed-loop Advanced Geothermal Systems: Possibilities in the UK and internationally"
• 2000     Cash Bar drinks reception and further discussion
• 2200     Close

LOCATION
National Liberal Club, 1 Whitehall Place, London SW1A 2HE
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ORGANISER
Simons Parsons, Fuellers Liveryman

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