Recent research from the University of Dundee has highlighted a promising strategy for UK higher education institutions to transition from energy-intensive operations to low-emission facilities. Led by Ezekiel Okaga from the Department of Mechanical and Industrial Engineering, the study focuses on the economic viability of a hybrid microgrid system that combines solar photovoltaic (PV) technology, natural-gas-fuelled combined heat and power (CHP) generation, and the national grid.
The urgency for such transformations is underscored by the fact that two-thirds of UK higher education institutions have not met their emissions reduction targets. In 2005, these institutions pledged to reduce emissions by 43% by 2020, yet many have struggled to achieve this goal. The research aims to address this challenge by exploring various configurations of energy generation systems that can effectively lower emissions while also being economically viable.
Okaga’s team analyzed three design configurations: Grid + CHP, Grid + PV, and the most promising Grid + PV + CHP system. The findings reveal that the hybrid system offers the lowest levelized cost of electricity (LCOE), making it over 75% more cost-effective than other configurations. This setup not only reduces emissions by a minimum of 7.5% but also boasts a simple payback period of just 2.9 years, a discounted payback period of 2.6 years, and an impressive return on investment of 30.1%.
“The Grid + PV + CHP system provides a comprehensive solution that balances both economic and environmental considerations,” Okaga explained. “By integrating renewable energy sources, we can significantly lower operational costs while contributing to sustainability goals.”
The implications of this research extend beyond the academic realm; they present significant commercial opportunities for the energy sector. As institutions seek to meet stringent emissions targets and reduce energy costs, there is a growing market for hybrid energy solutions that leverage renewable technologies. Companies involved in the production and installation of solar PV panels, CHP systems, and energy management software stand to benefit from this shift in demand.
Furthermore, the study suggests that emissions could be further minimized by transitioning the CHP generator to renewable fuels like biodiesel, hydrogen, or ammonia. This opens additional avenues for innovation and investment in the energy sector, as businesses explore sustainable fuel alternatives.
Published in ‘Engineering Proceedings’, this research not only sheds light on the technical aspects of energy generation for educational institutions but also emphasizes the urgent need for sustainable practices across all sectors. As the UK aims for net-zero emissions by 2050, the findings from the University of Dundee could serve as a model for other institutions and industries striving for similar goals.
