Abstract
Abstract The present study is focused on investigating experimentally and numerically the four versions of a concentric double tube solar collector with and without vacuum, and with and without a reflective solar film. The conservation equations were used to formulate the thermal model and treated numerically to develop a home-made numerical code in matlab. An experimental setup is constructed to test the four versions of the collector under outdoor conditions and hence validate both the thermal model and the numerical procedure. The tests were performed during the summer and autumn seasons. The numerical outcomes agreed well with the experiments showing a maximum error of about 2.1%. The results indicated that the vacuum effect is significant and enhanced the efficiency by about 13.6% in the presence of the reflective film. An average increase of 6.6% was found in the case of the collector without reflective film but with the vacuum. The reflective solar film increased the efficiency by about 4.3% for all cases with or without vacuum.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
