Evaluation of Solar Air Heater Performance with Artificial Rib Roughness over the Absorber Plate using Finite Element Modelling Analysis

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Ravi Kumar, K.^1 ; Nikhil Varma, P.^1 ; Jagadeesh, N.^1 ; Sandeep, J.V.^1 ; Cheepu, Muralimohan^2 ; Venkateswarlu, D.^3 ; Srinivas, B.^1

Department of Mechanical Engineering, MVGR College of Engineering, Andhra Pradesh

535005, India^1

Department of Mechatronics Engineering, Kyungsung University, Busan

48434, Korea, Republic of^2

Department of Mechanical Engineering, Marri Laxman Reddy Institute of Technology and Management, Telangana

500043, India^3

关键词: Absorber plates;    Constant heat flux;    Different geometry;    Finite element modelling analysis;    Intensity factors;    Solar air heater;    Thermal Performance;    Turbulence kinetic energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012062/pdf
DOI  :  10.1088/1757-899X/330/1/012062

来源: IOP

【 摘 要 】

Among the different renewable energy resources, solar energy is widely used due to its quantitative intensity factor. Solar air heater is cheap, simple in design and has got wide range of applications. A modest solar air heater has a lower in heat transfer and thermal performance as it has heat transfer coefficient lower in between coated absorber plate and the carrier fluid. This low thermal performance can be reduced to a greater extent by introducing the artificially created roughness over the absorber plate of the solar heater. In the present study, the combination of various geometries and roughness's on the absorber plate are reported. Methods have been developed and implemented in order to improve the rate of the heat transfer. A comparison is drawn among different geometries to select the most effective absorber plate roughness. For flow analysis k-ω SST model was used and the constant heat flux was taken as 1100 W/m2. The Reynolds number is varied in a range from 3000 to 20000. The variation of different parameters temperature, Nusselt number, turbulence kinetic energy and heat transfer coefficient with Reynolds number were examined and discussed.