Experimental Investigation of Heat and Fluid Flow Characteristics on Expanded Metal Mesh Roughened Solar Collector
DOI:
https://doi.org/10.48048/tis.2022.6326Keywords:
Solar air heater, Wire rib roughness, Air duct, Expanded metal mesh, DryerAbstract
Solar air heater is used for agricultural grain products drier, curing of industrial products and for other systems requiring low grade thermal energy. Their usefulness and quantitative energy collections has been limited. This is because of low thermal efficiency with primarily as a result of low convective heat transfer coefficient, between the absorber plate and air leading to higher plate temperature. This results greater thermal energy losses. Experimental investigation has been conducted to study heat transfer enhancement by using small diameter wire ribs on absorber plate of solar air heater duct, with the roughened wall exposed to the glazing side while the remaining 3 walls were insulated. The roughened wall has relative roughness height (e/Dh) 0.0135 - 0.0406, relative roughness pitch (p/e) 10 - 20, rib height 0.5 - 1.5 mm, expanded metal mesh (L/e) 25 - 75, Short way mesh (S/e) 15 - 45, angle of attack 45° for inclined configuration, duct aspect ratio of 12 and the air flow rate corresponds to Reynolds number between 2,000 to 18,000. It has been found that the heat transfer coefficient could be improved by a factor up to 2.2 and the friction factor had been found to increase by a factor of 1.2 times that of the smooth duct. The investigation emphasized that the secondary flow rolling along the inclined ribs is responsible for higher heat transfer rates. Thermal efficiency increased from 50.58 - 65.75 %. Finally, correlation is developed for both Nusselt number and friction factor using sigma plot software, which can be selected by the designer for a given operating condition.
HIGHLIGHTS
- At the moment agricultural products are spoiled due to poor dryer
- A solar air heater with expanded metal mesh roughened solar collector is designed, manufactured and experimental test is conducted
- An efficient solar dryer is obtained
GRAPHICAL ABSTRACT
Downloads
Metrics
References
DOF Philosphy and AK Behura. Investigation on heat transfer and friction friction factor characteristics in three sides artificially roughened solar air heaters. Jamshedpur 831014. 2016.
P Saini, DK Rao and AK Patil. A Review on artificially roughened solar air heater and air impingement techniques. Int. J. Emerg. Technol. 2017; 8, 435-40.
DS Rawat and AR Jaurker. Enhancement of heat transfer using artificial roughness in solar air heater. Int. J. Emerg. Sci. Invent. 2014; 3, 50-63.
J Singh and H Singh. A Review on Solar Air Heater using various roughness geometries on roughened duct to increase heat transfer coefficient and friction characteristics. Int. J. Adv. Res. Innov. 2018; 6, 340-5.
R Karwa and V Srivastava. Thermal performance of solar air heater having absorber plate with v-down discrete rib roughness for space-heating applications. J. Renew. Energ. 2013; 2013, 151578.
SA Dhatkar, AC Khandelwal and AB Kanase-Patil. A review of solar air heaters using wire mesh absorber. Int. J. Theor. Appl. Res. Mech. Eng. 2015; 4, 31-9.
V Bhumarkar. A review on roughness geometry used in solar air heaters. Int. J. Eng. Res. Gen. Sci. 2015; 3, 710-23.
J Singh. An encompassing review on solar air heater. Int. J. Res. Appl. Sci. Eng. Technol. 2016; 4, 244-52.
S Agrawal and JL Bhagoria. Effect of artificial roughness geometries on thermo-hydraulic efficiency of solar air heater. In: Proceedings of the International Conference on Emanations in Modern Technology and Engineering, Maharashtra, India. 2017, p. 186-206.
MK Solanki. Performance analysis of solar air heater duct roughened with inclined ribs with and without a gap in a staggered roughness arrangement on absorber plate. Int. J. Eng. Technol. Sci. Res. 2018; 5, 205-14.
RP Saini and J Verma. Heat transfer and friction factor correlations for a duct having dimple-shape artificial roughness for solar air heaters. Energy 2008; 33, 1277-87.
N Madhukeshwara and NHS Swamy. Effect of various artificial roughness parameters on heat transfer and friction characteristics for flow inside rectangular ducts of solar air heater. Int. Adv. Res. J. Sci. Eng. Technol. 2016; 3, 106-12.
AK Behura, SK Rout, H Pandya and A Kumar. Thermal analysis of three sides artificially roughened solar air heaters. Energy Procedia 2017; 109, 279-85.
PM Gupta, AS Das, RC Barai, SC Pusadkar and VG Pawar. Design and construction of solar dryer for drying agricultural products. Int. Res. J. Eng. Technol. 2017; 4, 1946-51.
TB Tibebu. 2015, Design, construction and evaluation of performance of solar dryer for drying fruit. Master Thesis. Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
ZAA Majid, AA Razak, MH Ruslan and K Sopian. Characteristics of solar thermal absorber materials for cross absorber design in solar air collector. Int. J. Automat. Mech. Eng. 2015; 11, 2582-90.
VU Ahiaba. Thermal behaviour of passive solar system designed for brooding and incubating purpose under Makurdi weather. Int. J. Innov. Sci. Eng. Technol. 2015; 2, 747-59.
AH Bademlioglu, AS Canbolat and O Kaynakli. Calculation of optimum insulation thickness using the heating degree-days method for the different cost approaches. Int. Res. J. Adv. Eng. Sci. 2018; 3, 189-92.
M Durusoju. An experimental investigation of thermal performance of solar air heater with ‘W’ wire mesh. Int. J. Res. Appl. Sci. Eng. Technol. 2016; 4, 5-14.
M Abubakar, A Raji and MA Hassan. Comparative study of thermal insulation boards from leaf and bark fibres of camel’ s foot (Piliostigma Thonningii L.). Niger. J. Technol. 2018; 37, 108-14.
Cummins College of Engineering. Fluid mechanics laboratory manual: Calibration of orifice meter. No. 6. Cummins College of Engineering.
NELC Marshall. A differential pressure meter for low Reynolds number applications. In: Proceedings of the 35th International North Sea Flow Measurement Workshop, Tønsberg, Norway. 2017, p. 1-27.
GN Thombre and SM Lawankar. Review on thermo-hydraulic performance of solar air heater having artificial roughness on absorber plate. Int. Res. J. Eng. Technol. 2017; 4, 1188-97.
SK Gharai and A Layek. Heat transfer measurement in rectangular channel with detach ribs by liquid crystal thermography. Int. J. Heat Technol. 2018; 36, 1502-9.
A Nagaraju and BUM Gowd. Enhancement of heat transfer and thermo-hydraulic performance using triangular protrusions as roughness elements. Int. J. Eng. Res. Appl. 2015; 5, 18-22.
RS Gill, VS Hans and JS Saini. Heat transfer and friction characteristics of solar air heater duct roughened by broken arc shaped ribs combined with staggered rib piece. Int. J. Eng. Res. Technol. 2015; 4, 604-10.
JP Holman. Instructor’s solutions manual experimental methods for engineers. McGraw-Hill Education, New York, 2000.
A Kumar, JS Sanjay, HA Shivaji and KS Dattatraya. Effect of various artificial roughnesses on solar air heater performance. Int. Res. J. Adv. Eng. Sci. 2018; 3, 67-72.
S Mohan and L Rekha. Design, fabrication and testing of solar air. Int. J. Eng. Res. Technol. 2016; 5, 413-8.
SS Mohapatra. 2012, Development and performance evaluation of a natural convection grain dryer. Ph. D. Dissertation. Indian Institute of Technology Guwahati, Assam, India.
A Nagaraju and BUM Gowd. Nusselt number and friction factor correlations for solar air heater duct having triangular protrusions as roughness elements on absorber plate. Int. J. Mech. Eng. Technol. 2015; 6, 35-44.
N Mahesh, SK Bhor and BRV Bharat. Enhancement of heat transfer rate and thermal efficiency of solar air heater by using flow turbulators’ - a review. Int. J. Innov. Res. Sci. Eng. Technol. 2015; 4, 18450-5.
A Kumar. Analysis of heat transfer and fluid flow in different shaped roughness elements on the absorber plate solar air heater duct. Energy Procedia 2014; 57, 2102-11.
NN Kharbade and RS Shelke. Methods of performance of solar air heater using different artificial roughness. Int. J. Innov. Res. Sci. Eng. Technol. 2016; 5, 583-94.
N Kamlapure, S Talwar and PA Patil. Experimental study of heat transfer enhancement in a rectangular duct channel with delta wing vortex generator. Int. J. Eng. Tech. Res. 2016; 5, 61-4.
SS Halewadimath, P Subbhapurmath, N Havaldar, K Hunashikatti and S Gokhale. Experimental analysis of solar air dryer for agricultural products. Int. Res. J. Eng. Technol. 2015; 2, 1517-23.
MR Farooqui. 2015, A numerical study on effect of rectangular shaped ribs arranged in different patterns on thermal performance of a solar air heater duct. Master Thesis, National Institute of Technology Rourkela, Rourkela, India.
HI Elsanossi. Performance analysis of solar air heater with different absorber material in single pass. Int. Res. J. Eng. Technol. 2018; 5, 2795-801.
AE Kabeel, MH Hamed, ZM Omara and AW Kandeal. Solar air heaters: Design configurations, improvement methods and applications - a detailed review. Renew. Sust. Energy Rev. 2016; 70, 1189-206.
CP Mohanty, AK Behura, MR Singh, BN Prasad, A Kumar, G Dwivedi and P Verma. Parametric performance optimization of three sides roughened solar air heater. Energy Sources A: Recovery Util. Environ. Eff. 2020. https://doi.org/10.1080/15567036.2020.1752855
A Kumar, AK Behura, S Saboor and HK Gupta. Comparative study on W-shaped roughened solar air heaters by using booster mirror. Mater. Today Proc. 2021; 46, 5675-80.
S Skullong. Performance enhancement in a solar air heater duct with inclined ribs mounted on the absorber. J. Res. Appl. Mech. Eng. 2017; 5, 55-64.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
