Developing novel 5th generation district energy networks

Abstract

Integrated smartly controlled energy networks have the potential to deliver significant reductions in carbon emissions, improve air quality and reduce energy costs for end-users across the world. This paper introduces a novel methodology for the development of integrated thermal, power and mobility 5th generation (5G) smart energy networks. The proposed 5G concept builds on state of the art by connecting flexible electricity demands such as heat pumps, and electric vehicles to intermittent, renewable and secondary energy sources and storage using artificial intelligence to facilitate optimal control and to maximise revenue and carbon savings. The proposed innovative method is being applied in central London through the development of two independent 5G smart energy schemes. The proposed schemes will incorporate a range of different renewables and secondary energy sources, for example, waste heat from local data centres and the London Underground that will supply a large proportion of the energy demand of the overall district network capacity. Both networks will operate at close to ambient temperature, approximately 15–25 °C as a so-called ‘ambient loop’ system, with individual heat pumps for each end-user or building connected to the network. The system also integrates thermal and electrical storage to create additional flexibility for the network and smart control for demand-side management. A smart management system flexibly controls individual assets such as heat pumps and electric vehicles in response to price signals reflecting the intermittency of renewable energy sources on the electricity grid. The ambient district thermal loop will distribute low carbon energy to a range of end users. Results presented in this paper provide an understanding of capital costs associated with integrated smart energy systems and the relative performance of individual technologies in a complex system using a techno-economic modelling approach. Overall, this paper demonstrates that the implementation of the 5G concept results in lower energy costs to consumers while at the same time transforming a large existing urban area to a near zero-carbon energy system in terms of heating, cooling, electricity and transport.