Exploring Aberdeen's potential for geothermal energy using sensors

The University of Aberdeen has launched a project to explore the potential of geothermal energy in the city. Using sensors, the initiative aims to assess the feasibility of extracting heat from beneath Aberdeen's granite streets to provide sustainable heating for homes and public buildings.

The University of Aberdeen has initiated a project to assess the feasibility of geothermal energy in the city through the Aberdeen Geothermal Feasibility Pilot (AGFP). This initiative is focused on exploring the potential for extracting heat from beneath Aberdeen's granite streets to provide sustainable heating for residential and public buildings.

How Geothermal Energy Functions

Geothermal energy is generated by pumping cold water deep underground, where it absorbs natural heat from the earth. The water, heated in the subterranean layers, is then returned to the surface at temperatures sufficient to provide heating for homes, offices, and public facilities. This process allows for a continuous, low-carbon source of energy without reliance on fossil fuels.

Sensor Network Deployment

As part of the project, approximately 100 small seismic sensors are being installed across green spaces from the Bridge of Don to Nigg, as well as in central areas of Aberdeen. These sensors are designed to monitor geological activity and the earth's internal temperature. Buried beneath the soil, the sensors operate unobtrusively, collecting data while remaining invisible within the urban landscape.

The sensors create a three-dimensional subsurface map of the city's granite foundation, extending up to three stories below ground level. This detailed mapping is intended to identify optimal locations for future geothermal heating installations, providing a precise understanding of the distribution of heat within Aberdeen's underground layers.

Project Objectives and Advantages

The AGFP seeks to determine whether geothermal energy can serve as a reliable, local, and environmentally friendly source of heating. The project has several anticipated benefits, including:

• Reducing carbon emissions by providing a sustainable heating alternative.
• Supplying consistent heating for homes, public buildings, and community spaces.
• Developing a model for future geothermal projects within urban environments.

Dr. Amy Gilligan, a researcher leading the project, emphasized the importance of this stage: "This marks a significant development for geothermal research in Aberdeen. Beneath the granite streets, the sensor network will translate the subtle signals of the earth into a detailed geological map." She added that the sensors are largely imperceptible once installed and that the data collected could enable a geothermal system capable of reducing the city's carbon footprint while supplying clean heat.

Global and Local Context

Geothermal energy has been successfully harnessed in locations such as Iceland, which serves as a model for sustainable extraction of underground heat. In the United Kingdom, the Eden Project in Cornwall has implemented a geothermal well activated in June 2023, demonstrating the viability of geothermal solutions in temperate climates.

Within Aberdeen, NHS Grampian has explored the potential for geothermal heat to reduce operational heating costs. The current pilot project extends this exploration, aiming to provide a replicable framework for sustainable energy in urban settings. By integrating advanced sensor technology with three-dimensional subsurface mapping, the initiative seeks to transform Aberdeen's heating infrastructure into a cleaner, more environmentally responsible system.

Future Outlook

The Aberdeen Geothermal Feasibility Pilot represents a tangible step toward a city powered by the earth's heat. The combination of sensor networks and 3D mapping technology allows researchers to pinpoint areas where geothermal heating can be implemented effectively. If successful, this project could provide a model for other cities seeking sustainable heating solutions and significantly contribute to Aberdeen’s efforts to reduce its carbon emissions.

Ultimately, the project highlights the potential of utilizing subsurface heat to create a sustainable, local energy source, offering long-term environmental and economic benefits for Aberdeen's communities.

Sources:

• University of Aberdeen invests £1 million in geothermal pilot
• £1 million project to unlock heat trapped beneath Aberdeen
• Sensors explore Aberdeen's geothermal energy potential

Author: Ava Mitchell
Ava Mitchell is a journalist covering culture, art, and literature. She is known for her creative approach and ability to produce in-depth features and interviews.