Date of download: 12/27/2017 Copyright © ASME. All rights reserved. Thermal Performance and Operation of a Solar Tubular Receiver With CO2 as the Heat Transfer Fluid J. Sol. Energy Eng. 2017;139(4):041004-041004-9. doi:10.1115/1.4036414 Figure Legend: Stand-alone solar receiver operation with multiple focus points and without preheating inlet gas at full flow (Mar. 27, 2015): (a) DNI and absorbed heat rate, (b) estimated solar receiver thermal efficiency and measured temperatures, and (c) mass flow rate and pressures