Performance Improvement of Solar Air Heater through Rib Roughness on the Absorber Plate
Year: 2025
Type: article
Abstract: To improve heat transmission in solar air heaters, a well-established method involves the insertion of ribs that are designed to change the patterns of fluid flow and induce whirling flow. This causes the thermal boundary layer to be disrupted. On the other hand, this strategy frequently results in a decrease in pressure in the flow path. It is possible to improve the efficiency of SAH ducts by utilising absorber plates that have been roughened. The notion of artificial roughness on flat surfaces is an essential strategy that may be used to improve the rate of heat transfer of air that is passing through an air heater (SAH). A significant factor that influences the rate at which heat is transmitted is the sort of geometry that is utilised and how it is recommended to be positioned within the duct. By adjusting the design of the ribs, researchers have been able to examine the heat transport and friction qualities of SAHs over the course of time. The purpose of this review article is to analyse a variety of artificial enhancers and the impact that they have on heat transmission. Enhanced substances are classified according to the shape and pattern of insertion that they possess. The different types of V-shaped rib, as well as their placement patterns, such as vertical, transverse, or longitudinal, are discussed in this article. The roughness and operating parameters of SAH have also been documented, and it has been stated that investigators were able to attain their greatest performance for these parameter sets. Major Findings: Troublesome flow and secondary flow improve heat transmission and SAH performance when roughness isincluded. Shape, orientation, and configuration of V-wires affect Nusselt numbers and friction. These components can improveheat transfer and reduce pressure loss with proper design.
Authors: Anil Singh Yadav, Ravi Shankar, Amit Jain, Raman Kumar, Abhishek Kumar Jain, Rahul Vayas, Vipin Shrivastava, Vandana Anand, Yogesh Agrawal, Abhishek Sharma, Geetesh Goga, Rajeev Gupta, Shivam Kumar
Language: English
Topic: Heat Transfer Mechanisms
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4415104556