دانلود رایگان مقاله مطالعه عددی و تجربی از یک کلکتور حرارتی چین دار

Abstract

The present work proposes a design for solar thermal collectors and also a numerical simulation analysis procedure to evaluate the collector performance. The performance of this collector is compared with the performance of other two commercial ones by observing both the numerical modeling study and experimental test results. Benefits of using the corrugated parallel approach, in terms of yield, are shown applying a new alternative approach of numerical modeling. A better performance is observed for the corrugated parallel collector, which provides a higher yield using an energy-absorbing surface. Moreover, the proposed numerical methodology could be used to evaluate the performance of other thermal collector configurations.

6. Conclusions

A corrugated solar design with parallel configuration has been successfully proposed. Its performance has been compared with other current solar collectors such as Roth and BBC. The three typologies provide high efficiency values but the proposed design presents the highest one. Thus, the yield obtained by the proposed model is equal to 86%, while the yield corresponding to the BBC and Roth collectors are 80% and 77.9%, respectively. This result is more significant assuming that the new model just represents 88% the surface of BBC collector and 44% the surface in the case of collector Roth. This advantage is obtained due to its novel design of corrugated conduits, which increases the contact surface between the carrier fluid and the absorber plate. It is also important to note that the experimental instantaneous efficiency for Roth and BBC collectors and the results obtained from the numerical simulation for corrugated collector are very similar, especially those from the BBC and corrugated collector. Therefore, the numerical simulation provides reliable results, close to reality. But the proposed corrugated design presents the highest instantaneous efficiency during all the test day. This result supports the development of the proposed corrugated collector and its application in any place where hot water is required such as buildings and cruise ships. In addition, the proposed numerical methodology has provided properly the main parameters that characterize the thermal behavior of the corrugated collector with parallel configuration. This simulation procedure can be applied to other collector geometries for buildings.