Experimental investigation of the daily performance of an integrated linear Fresnel reflector system

•A small linear Fresnel reflector is studied experimentally and numerically on a daily basis.•Totally 52 experimental days are examined from May to October.•The developed numerical model estimates with a reasonable accuracy the daily heat production at 100 °C.•The maximum daily yield for 36 m2 collector aperture was found to be 260 MJ on June 22nd.•The maximum instantaneous heat production for 36 m2 collector aperture was found to be 8.4 kW.