CFD analysis of heat transfer characteristics of rectangular solar air heater with kite shaped roughness

2021 ◽  
Author(s):  
Harvindra Singh ◽  
Himmat Singh ◽  
Rahul Bahuguna ◽  
Chandra Kishore
Keyword(s):  
Heat Transfer ◽  
Solar Air Heater ◽  
Cfd Analysis ◽  
Heat Transfer Characteristics ◽  
Air Heater ◽  
Transfer Characteristics

Numerical Heat Transfer Investigation in Solar Air Heater Channel with Wavy-Baffles

2014 ◽  
Vol 1051 ◽  
pp. 808-812
Author(s):  
Pongjet Promvonge ◽  
Watcharin Noothong ◽  
Chinaruk Thianpong
Keyword(s):  
Heat Transfer ◽  
Thermal Performance ◽  
Numerical Study ◽  
Simple Algorithm ◽  
Solar Air Heater ◽  
Heat Transfer Characteristics ◽  
Air Heater ◽  
Transfer Characteristics ◽  
Numerical Result ◽  
Smooth Channel

A numerical study is conducted to investigate the turbulent periodic flow and heat transfer characteristics in a channel fitted with sinusoidal wavy-baffles placed on upper and lower walls. The finite volume method is introduced and implemented with the SIMPLE algorithm. The flow structure, friction factor and heat transfer characteristics for different wavy-baffle configurations are evaluated. According to numerical result, the maximum thermal performance is found to be 1.22–1.66 times to smooth channel corresponding to the baffle a/H=0.75 and b/H=0.10. Consequently, the application of wavy-baffles can be utilized effectively to enhance the thermal performance of solar air heater.

Theoretical prediction of performance of Single and Double pass solar air heaters with artificial roughened absorber plates

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
S. G. Sam Stanley ◽  
K.Kalidasa Murugavel Kumar Reddy ◽  
M. Blessy Queen Mary
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Theoretical Prediction ◽  
Friction Factor ◽  
The Other ◽  
Solar Air Heater ◽  
Roughness Parameters ◽  
Heat Transfer Characteristics ◽  
Double Pass ◽  
Transfer Characteristics

Investigations are carried out on artificial roughened absorber plates on Solar air heater. The roughness parameters are identified in to five basic profiles A, B, C, D and E. The profiles A, B and C are basic cubical and cylindrical profiles and the profiles D and E are categorized as rod arrangement of inline and staggered nature. Both frictional and heat transfer characteristics have been studied. Optimum results of frictional and heat transfer characteristics have been arrived out. Results show a higher value of frictional factor for the profile E. All reasons of variations have been justified and discussed. The deviation of friction factor from modified Balsius equation is within the limit of 4.32 %. Results also show higher value of Nusselt number for the inline rod arrangement of SAH than the other profiles.

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