Investigation of various types of solar collectors , Implications of nanofluids

Solar water heating (SWH) is a clean, reliable, and cost-effective method of harnessing solar energy effectively to satisfy ۵۰–۸۰% of hot water needs. SWH technology is currently employed in many countries to reduce utility bills in both commercial sectors and houses. With the advancement of technology, SWH systems can be operated efficiently in any geographical area and climatic region in the world. However, the installation and overall performance of the system are still questionable. This review aims to provide an overview of the most commonly used solar water heating technologies. In this article, we examine the types of flat plate collectors, parabolic, Evacuated tubes, etc. By using these collectors, and the use of renewable and solar energy, in reducing energy consumption and reducing fossil fuel consumption, we will have a great contribution in reducing air pollution and energy efficiency.