Imperial College London

ProfessorChristosMarkides

Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Freeman:2016:10.1016/j.apenergy.2016.04.041,
author = {Freeman, J and Hellgardt, K and Markides, CN},
doi = {10.1016/j.apenergy.2016.04.041},
journal = {Applied Energy},
pages = {291--303},
title = {Working Fluid Selection and Electrical Performance Optimisation of a Domestic Solar-ORC Combined Heat and Power System for Year-Round Operation in the UK},
url = {http://dx.doi.org/10.1016/j.apenergy.2016.04.041},
volume = {186},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - In this paper, we examine the electrical power-generation potential of adomestic-scale solar combined heating and power (S-CHP) system featuringan organic Rankine cycle (ORC) engine and a 15-m2solar-thermal collectorarray. The system is simulated with a range of organic working fluids andits performance is optimised for operation in the UK climate. The findingsare applicable to similar geographical locations with significant cloud coverage,a low solar resource and limited installation areas. A key feature of thesystem’s design is the implementation of fixed fluid flow-rates during operationin order to avoid penalties in the performance of components suffered atpart-load. Steady operation under varying solar irradiance conditions is providedby way of a working-fluid buffer vessel at the evaporator outlet, whichis maintained at the evaporation temperature and pressure of the ORC. Byincorporating a two-stage solar collector/evaporator configuration, a maximumnet annual electrical work output of 1070 kWh yr−1(continuous averagepower of 122 W) and a solar-to-electrical efficiency of 6.3% is reported withHFC-245ca as the working fluid at an optimal evaporation temperature of126 C (corresponding to an evaporation pressure of 16.2 bar). This is equivalentto ∼ 32% of the electricity demand of a typical/average UK home, andrepresents an improvement of more than 50% over a recent effort by the sameauthors based on an earlier S-CHP system configuration and HFC-245fa asthe working fluid [1]. A performance and simple cost comparison with standalone,side-by-side PV and solar-thermal heating systems is presented.
AU - Freeman,J
AU - Hellgardt,K
AU - Markides,CN
DO - 10.1016/j.apenergy.2016.04.041
EP - 303
PY - 2016///
SN - 0306-2619
SP - 291
TI - Working Fluid Selection and Electrical Performance Optimisation of a Domestic Solar-ORC Combined Heat and Power System for Year-Round Operation in the UK
T2 - Applied Energy
UR - http://dx.doi.org/10.1016/j.apenergy.2016.04.041
UR - http://hdl.handle.net/10044/1/31099
VL - 186
ER -