This paper presents a comprehensive literature review of the various heat transfer techniques used to increase the performance of double-pass solar air heaters (SAHs). The heat transfer from absorber plate to air can be improved by increasing the convective heat transfer coefficient, the heat transfer area and by reducing thermal losses. These methodologies have guided the design and development of double-pass SAHs, and the results of several experimental studies show that double pass SAHs achieve better performance than single-pass SAHs. Literatures on double-pass SAHs have been reviewed to understand the different techniques used for performance improvement. The different operating and system parameters have been categorized to understand their performance behavior. The literature also reveals that numbers of techniques have been employed to improve heat transfer. These techniques include the incorporation of various features into the SAH design, such as extended surfaces, corrugated surfaces, artificial roughness, and packed beds. Furthermore, it is found that packed bed increase the heat transfer rate along with reduction in losses to environment because insolation is absorbed in the depth of packing material cause to lower the top layer temperature and, thereby, improvement in thermal losses.
Renewable and Sustainable Energy Reviews – Elsevier
Published: Nov 1, 2017
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera