Energy performance and profitability of biomass boilers in commercial sector: the case study of Sainsbury’s stores in the UK

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Title: Energy performance and profitability of biomass boilers in commercial sector: the case study of Sainsbury’s stores in the UK
Authors: Sorrentino, A
Pantaleo, AM
Markides, C
Braccio, G
Fanelli, E
Camporeale, S
Item Type: Conference Paper
Abstract: Commercial buildings or shopping malls are characterized by large thermal and electrical energy consumptions with high variability of energy demand. Therefor e, there is a large interest to explore novel renewable energy generation systems for these applications. A novel flexible configuration of biomass - fired CHP system with organic Rankine cycle (ORC) is here proposed and applied to the case study of Sainsbur y’s supermarkets in the UK . The proposed configuration adopts a molten salt (MS) circuit to transfer heat from the biomass furnace to the ORC plant. A thermal Energy Storage (TES) is proposed to improve the flexible operation of the plant and reduce the si ze of the biomass boiler . Molten salts have been preferred to thermal oil as they have no fire risks and low environmental impact and can be used as medium for a Two Tank TES with a “direct heating” scheme. Th e plant has been analysed using real input dat a of biomass boiler installed, conversion efficiency and heat demand from the store. The model is informed by hourly energy costs and electricity feed in tariff in order to d efine optimal size and operation of the bottoming ORC for the specific case study of large commercial energy end user in the UK. The results show that the use of thermal storage in a biomass - fired ORC plant can improve the boiler efficiency and reduce the biomass consumption in thermal - load following operating mode and increase the inve stment profitability.
Issue Date: 12-Sep-2018
Date of Acceptance: 28-Aug-2018
ISSN: 1876-6102
Publisher: Elsevier
Journal / Book Title: Energy Procedia
Copyright Statement: This paper is embargoed until publication.
Sponsor/Funder: Sainsbury's Supermarkets Ltd
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: CEPSE_P57236
Conference Name: 73rd Conference of the Italian Thermal Machines Engineering Association (ATI 2018)
Publication Status: Accepted
Start Date: 2018-09-12
Finish Date: 2018-09-14
Conference Place: Pisa, Italy
Embargo Date: publication subject to indefinite embargo
Appears in Collections:Faculty of Engineering
Chemical Engineering

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