Design and experimental analysis of low-cost heat water solar collectors

摘要

Owing to fossil fuels' consumption and environmental pollution, it is necessary to make efficient use of energy based on the different renewable energy sources such as solar energy. The present research has focused on the design, construction, and assembly of a train of solar energy collectors consisting of five concentrators, which individually have significant differences in the arrangements focus tube reflective surface and the greenhouse effect. The collectors are operated under the same environmental conditions. In the analysis presented on the train of solar energy collectors, a theoretical-experimental study was performed on the different reflecting surfaces of each collector, such as the mirrors' reflecting surface, reflecting surface of the 316 L stainless-steel mirror polished, reflecting surface of the aluminum foil's reflective surface with an aluminum paint, surface reflective type 304 stainless steel-mirror polish. The present study was developed to analyze and discuss the increase in the useful energy (Qu, kW) and efficiency of the collector (n, %). The results of the study have that the highest average increases in performance and energy experimental tool for each collector are in the following order: 316 L stainless-steel collector (50.5 kW with 37%) >304 stainless-steel collector (43.1 kW with 31.6%) > aluminum collector (35.2 kW with 25.8%) = mirror collector (35.5 kW with 25.6%) > aluminum paint collector (0.4 kW with 0.3%). The best performance was obtained from the stainless-steel solar collectors, regardless of the type of stainless-steel quality. Thus, it is advisable to use the experimental model itself as a supporting tool for drawing up the computer design. In fact, the use of 316 L or 304 stainless-steel low-cost heat water solar collector represents an environmentally friendly alternative.