@article { , title = {Software simulation and experimental characterisation of a rotationally asymmetrical concentrator under direct and diffuse solar radiation.}, abstract = {Making housing carbon neutral is one of the European Union (EU) targets with the aim to reduce energy consumption and to increase on-site renewable energy generation in the domestic sector. Optical concentrators have a strong potential to minimise the cost of building integrated photovoltaic (BIPV) systems by replacing expensive photovoltaic (PV) material whilst maintaining the same electrical output. In this work, the performance of a recently patented optical concentrator known as the rotationally asymmetrical dielectric totally internally reflective concentrator (RADTIRC) was analysed under direct and diffuse light conditions. The RADTIRC has a geometrical concentration gain of 4.969 and two half acceptance angles of ±40° and ±30° respectively along the two axes. Simulation and experimental work has been carried out to determine the optical concentration gain and the angular response of the concentrator. It was found that the RADTIRC has an optical concentration gain of 4.66 under direct irradiance and 1.94 under diffuse irradiance. The experimental results for the single concentrator showed a reduction in concentration gain of 4.2\% when compared with simulation data.}, doi = {10.1016/j.enconman.2016.05.072}, eissn = {1879-2227}, issn = {0196-8904}, journal = {Energy conversion and management}, note = {COMPLETED -- Requested document 08.06.2016 GB -- Issued 01/06/2016 (Scholar alert) -- Accepted 25/05/2016 ADDITIONAL INFORMATION: Muhammad-Sukki, Firdaus -- Panel B}, pages = {223-238}, publicationstatus = {Published}, publisher = {Elsevier}, url = {http://hdl.handle.net/10059/1514}, volume = {122}, keyword = {Photovoltaic, Optical concentrator, Asymmetrical concentrator}, year = {2016}, author = {Freier, Daria and Muhammad-Sukki, Firdaus and Abu-Bakar, Siti Hawa and Ramirez-Iniguez, Roberto and Mas'ud, Abdullahi Abubakar and Albarracín, Ricardo and Ardila-Rey, Jorge Alfredo and Munir, Abu Bakar and Yasin, Siti Hajar Mohd and Bani, Nurul Aini} }