Abstract
At the University of Szeged Faculty of Engineering we design solar collectors since 2005. For the tests of our collectors and for other researches about collectors we designed a measuring equipment which is capable for measuring the efficiency as the function of the specific solar irradiation and the temperature difference between the collector and the ambient air. The temperature different between the collector and the ambient air in our system is well-controlled with the fan coil which transfers the heat from the collectors to the ambient air. With this construction we can change the temperature of the fluid at the intake of the collectors and simulating transient effects. By the data loggers we have registered the values every 5 seconds. The calculation of the instantaneous efficiency of solar collector is conditioned. Based on the results of the measurements the MATLAB model of the analysed solar collectors is developed. During the design of a flat solar collector with this model the function of the efficiency could be pre-calculated.
Highlights
The function of efficiency of a solar collector generally depends on many parameters
For the tests of our collectors and for other researches about collectors we designed a measuring equipment which is capable for measuring the efficiency as the function of the specific solar irradiation and the temperature difference between the collector and the ambient air
According to accepted practice in scientific research institutes the function of efficiency of the analyzed solar collector has two independent variables, namely: – intensity of solar irradiation (G, Wm-2), – temperature difference between the collector and the ambient air
Summary
The function of efficiency of a solar collector generally depends on many parameters. For a specific type of collector these parameters are fixed. According to accepted practice in scientific research institutes the function of efficiency of the analyzed solar collector has two independent variables, namely: – intensity of solar irradiation (G, Wm-2), – temperature difference between the collector and the ambient air (tcoll-tair, °C). A collector/absorber has radiative, conductive and convective heat losses. These losses are zero at t = 0 when the liquid is at ambient temperature and increase with time as the temperature of the liquid increases [1].
Sign-in/Register to view highlights & summary 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 callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: 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.
