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 = {Wang, K and Pantaleo, AM and Herrando, M and Faccia, M and Pesmazoglou, I and Franchetti, BM and Markides, CN},
doi = {10.1016/j.renene.2020.05.120},
journal = {Renewable Energy},
pages = {1047--1065},
title = {Spectral-splitting hybrid PV-thermal (PVT) systems for combined heat and power provision to dairy farms},
url = {},
volume = {159},
year = {2020}

RIS format (EndNote, RefMan)

AB - Dairy farming is one of the most energy- and emission-intensive industrial sectors, and offers noteworthy opportunities for displacing conventional fossil-fuel consumption both in terms of cost saving and decarbonisation. In this paper, a solar-combined heat and power (S–CHP) system is proposed for dairy-farm applications based on spectral-splitting parabolic-trough hybrid photovoltaic-thermal (PVT) collectors, which is capable of providing simultaneous electricity, steam and hot water for processing milk products. A transient numerical model is developed and validated against experimental data to predict the dynamic thermal and electrical characteristics and to assess the thermoeconomic performance of the S–CHP system. A dairy farm in Bari (Italy), with annual thermal and electrical demands of 6000 MWh and 3500 MWh respectively, is considered as a case study for assessing the energetic and economic potential of the proposed S–CHP system. Hourly simulations are performed over a year using real-time local weather and measured demand-data inputs. The results show that the optical characteristic of the spectrum splitter has a significant influence on the system’s thermoeconomic performance. This is therefore optimised to reflect the solar region between 550 nm and 1000 nm to PV cells for electricity generation and (low-temperature) hot-water production, while directing the rest to solar receivers for (higher-temperature) steam generation. Based on a 10000-m2 installed area, it is found that 52% of the demand for steam generation and 40% of the hot water demand can be satisfied by the PVT S–CHP system, along with a net electrical output amounting to 14% of the farm’s demand. Economic analyses show that the proposed system is economically viable if the investment cost of the spectrum splitter is lower than 75% of the cost of the parabolic trough concentrator (i.e., <1950 €/m2 spectrum splitter) in this application. The influenc
AU - Wang,K
AU - Pantaleo,AM
AU - Herrando,M
AU - Faccia,M
AU - Pesmazoglou,I
AU - Franchetti,BM
AU - Markides,CN
DO - 10.1016/j.renene.2020.05.120
EP - 1065
PY - 2020///
SN - 0960-1481
SP - 1047
TI - Spectral-splitting hybrid PV-thermal (PVT) systems for combined heat and power provision to dairy farms
T2 - Renewable Energy
UR -
UR -
UR -
VL - 159
ER -