Порівняльні Результати Експериментальних Досліджень Різних Типів Плоских Сонячних Колекторів

Abstract

Full-scale traditional metal solar collectors and solar collector specimens fabricated from polymeric materials were investigated in the present study. A polymeric collector is 67.8% lighter than a traditional metal solar collector, and a metal solar collector with transparent plastic covering is 40.3% lighter than a traditional metal solar collector. Honeycomb multichannel plates made from polycarbonate were chosen to create a polymeric solar collector. A test rig for the natural circulation of the working fluid in a solar collector was built for a comparative experimental investigation of various solar collectors operating at ambient conditions. It was shown experimentally that the efficiency of a polymeric collector is 8-15% lower than the efficiency of a traditional collector.

Polymeric Materials for Solar Energy Utilization: A Comparative Experimental Study and Environmental Aspects

“…Experimental investigation showed that the efficiency of the polymeric solar collector designed in the present study decreased 7-14% compared to traditional SCs [9,15,22].…”

“…Analysis of polymeric materials used for solar collectors [22]. Most SCs are composed of the following elements: an absorber, a transparent cover, insulation, and a frame (Fig.…”

“…When selecting a PM for solar energy technology, it is necessary to take into consideration the following conditions: the optical transmission capacity of the material should be not lower than 90%; working temperatures (thermal stability) should be in the range of -15˚С to +130˚С; and the material should be stable to UVR. An analysis of the PM properties [22] shows that only some of these materials are suitable for such applications. Polypropylene, polysulfone, polyethylsulfone and cellulose polymers are unsuitable because of poor optical properties; polysulfone and polyethersulfone are stable against UVR, but they have an undesirable yellow color and mean transparency.…”

“…[22]. Different testing standards that are used worldwide for SC performance determination including ASHRAE-93 Standard (USA) and EN-12975 (European Union) [10,11] were used to follow the main challenges in the present research, which included: comparative testing of the different SC modifications when the SCs are operated in similar systems under the same conditions; the resolution of technological and constructive problems connected with the development of SC-P; comparison of the experimental results with those from previous similar research [22] . Comparative testing of the various SCs was carried out in 2011 and 2012 for the ambient conditions experienced in Ukraine (Odessa, coordinates: 46°28′N, 30°44′E) in the period from early spring until late autumn.…”

“…Experimental results and analysis [22]. The comparative behavior of the average temperature in the tank-accumulators according to time is presented for SC-A and SC-P shows the comparative temperature distribution of water at different heights in the tankaccumulator for SC-A and SC-P.…”