C.Balakrishna Moorthy , K. Dilip kumar , R. Vijayakumar , P. Madhu
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引用次数: 0
Abstract
This study examines how effectively solar air heaters (SAH) work when various absorber plate coatings are applied. For this, different absorber plate proportions of graphene Nano coatings are used with SAH with and without baffles. Several experiments are carried out, and the results are compared for SAH with and without baffles. These included black paint coating (Case 1), 1 wt% graphene Nanoplatelets (GNP’s) dispersed black paint (Case 2), 2 wt% GNP’s dispersed black paint (Case 3), 1 wt% graphene dispersed acrylic paint & black paint (Case 4), 2 wt% graphene dispersed acrylic paint & black paint (Case 5), 1 wt% graphene dispersed acrylic paint 1 wt% graphene in black paint (Case 6), 1 wt% graphene dispersed acrylic paint & 2 wt% graphene in black paint (Case 7), 2 wt% graphene dispersed acrylic & 1 wt% graphene in black paint (Case 8), and 2 wt% graphene dispersed acrylic & 2 wt% graphene in black paint (Case 9). The case with the highest thermal performance among all the cases examined is the one with 2 wt% graphene dispersed in acrylic and 2 wt% graphene in black paint (Case 9). Compared to other cases studied for SAH with and without baffles, case 9′s SAH with baffles produces a maximum average efficiency of 83.8 %. With the same configuration, the maximum average useful heat gains of 700.4 W and the maximum thermos-hydraulic performance parameter of 1.97 are achieved. Compared to others, the superior thermal characteristics and high graphene concentration in the SAH absorber exhibit superior thermal performance.
期刊介绍：
Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.
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