Imperial College London


Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy Technologies



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




404ACE ExtensionSouth Kensington Campus






BibTex format

author = {Herrando, M and Markides, CN and Hellgardt, K},
doi = {10.1016/j.apenergy.2014.01.061},
journal = {Applied Energy},
pages = {288--309},
title = {A UK-based assessment of hybrid PV and solar-thermal systems for domestic heating and power: System performance},
url = {},
volume = {122},
year = {2014}

RIS format (EndNote, RefMan)

AB - The goal of this paper is to assess the suitability of hybrid PVT systems for the provision of electricity andhot water (space heating is not considered) in the UK domestic sector, with particular focus on a typicalterraced house in London. A model is developed to estimate the performance of such a system. The modelallows various design parameters of the PVT unit to be varied, so that their influence in the overall systemperformance can be studied. Two key parameters, specifically the covering factor of the solar collectorwith PV and the collector flow-rate, are considered. The emissions of the PVT system are compared withthose incurred by a household that utilises a conventional energy provision arrangement. The resultsshow that for the case of the UK (low solar irradiance and low ambient temperatures) a complete coverageof the solar collector with PV together with a low collector flow-rate are beneficial in allowing thesystem to achieve a high coverage of the total annual energy (heat and power) demand, while maximisingthe CO2 emissions savings. It is found that with a completely covered collector and a flow-rate of 20 L/h,51% of the total electricity demand and 36% of the total hot water demand over a year can be coveredby a hybrid PVT system. The electricity demand coverage value is slightly higher than the PV-only systemequivalent (49%). In addition, our emissions assessment indicates that a PVT system can save up to16.0 tonnes of CO2 over a lifetime of 20 years, which is significantly (36%) higher than the 11.8 tonnesof CO2 saved with a PV-only system. All investigated PVT configurations outperformed the PV-only systemin terms of emissions. Therefore, it is concluded that hybrid PVT systems offer a notably improvedproposition over PV-only systems.
AU - Herrando,M
AU - Markides,CN
AU - Hellgardt,K
DO - 10.1016/j.apenergy.2014.01.061
EP - 309
PY - 2014///
SN - 1872-9118
SP - 288
TI - A UK-based assessment of hybrid PV and solar-thermal systems for domestic heating and power: System performance
T2 - Applied Energy
UR -
UR -
VL - 122
ER -