A system design for distributed energy generation in low temperature district heating (LTDH) networks

Jones, Sean and Gillott, Mark C. and Boukhanouf, Rabah and Walker, Gavin S. and Tunzi, Michele and Tetlow, David and Rodrigues, Lucélia Taranto and Sumner, M. (2017) A system design for distributed energy generation in low temperature district heating (LTDH) networks. In: 16th International Conference on Sustainable Energy Technologies (SET2017), 17-20 July, 2017, Bologna, Italy.

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Abstract

Project SCENIC (Smart Controlled Energy Networks Integrated in Communities) involves connecting properties at the University of Nottingham’s Creative Energy Homes test site in a community scale, integrated heat and power network. Controls will be developed to allow for the most effective heat load allocation and power distribution scenarios. Furthermore, the system will develop the prosumer concept, where consumers are both buyers and sellers of energy in both heat and power systems.

This paper describes the initial phase of project SCENIC, achieving truly distributed generation within a heat network. The first of its kind, the system has a four pipe network configuration, consisting of a network flow loop to supply heat to homes, and a generation loop to collect energy from residential heating systems and supply it to a centralised thermal store.

To achieve the design, IES-VE steady state heat load and dynamic building modelling have been used. A pre-insulated Rehau Rauthermex piping diameter was sized using flow rate calculations. Pipe diameter is reduced in line with distance from the central pump and associated pressure losses. The diameter ranges from 40 to 25mm, with a heat loss as low as 7.0 W/m. In addition, flow rates will fluctuate below a maximum of 1.99 l/s.

Danfoss – 7 Series BS flatstations have been selected as the network-building heat interface units (HIU), to satisfy a calculated peak design heating loads of between 36.74 and 44.06 kW. Furthermore, to enable the prosumer concept and associated business models an adapted Danfoss Flatstations – 3 Series BS was selected to interface the distributed heat sources with the network.

This paper gives details of the novel system configuration and concept, energy flows, as well as calculation and modelling results for the heat network. A premise is given to maintaining low temperatures in the network to ensure system efficiency in line with the latest research thinking.

Item Type: Conference or Workshop Item (Paper)
Keywords: Low temperature district heating, Smart heat networks, Distributed generation, Community energy
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Architecture and Built Environment
Related URLs:
Depositing User: Eprints, Support
Date Deposited: 18 Sep 2017 08:34
Last Modified: 18 Oct 2017 16:08
URI: http://eprints.nottingham.ac.uk/id/eprint/46466

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