Abstract
In this study, we have designed and developed a ribbed type solar air heater on the basis of theoretical studies. After the successful development of solar air heater, we have carried out some experimental result like outlet temperature and velocity of air. On the basis of experimental study, we have found that the temperature improvement is about 30–40 °C at free convection. The impact of temperature on mass flow rate, heat transfer rate and mass flow rate on pressure drop, friction factor, Reynolds number and Nusselt number is investigated. A significant enhancement is found in Thermal efficiency due to the ribs.
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Abbreviations
- A :
-
Surface area (m2)
- M :
-
Mass flow rate (kg/s)
- T :
-
Temperature (°C)
- V :
-
Velocity (m/s)
- d e :
-
Equivalent diameter (m)
- L :
-
Length of absorber plate (m)
- Q :
-
Heat transfer rate (W)
- Υ :
-
Kinematic viscosity (m2/s)
- F :
-
Friction coefficient
- δP :
-
Pressure loss (N/m2)
- Ρ :
-
Density (kg/m3)
- R e :
-
Reynolds number
- N u :
-
Nusselt number
- C p :
-
Specific heat of air (kJ/kg K)
- In :
-
Inlet (Tin = temperature of absorber plate at inlet)
- Out :
-
Outlet (Tout = temperature of absorber plate at outlet)
- RSAH :
-
Ribbed solar air heater
- MFR :
-
Mass flow rate
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Acknowledgements
This work was supported by the collaborative project scheme (CRS) fund under NATIONAL PROJECT IMPLEMENTATION UNIT (NPIU) (A Unit of MHRD, Govt. of India for Implementation of World Bank Assisted Projects in Technical Education) [CRS Project ID: 1-5728003471].
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Kumar, N., Singh, M.K., Yadav, V.S., Singh, V., Maheswari, A. (2022). An Experimental Investigation of Ribbed Solar Air Heater—Free Convection. In: Agrawal, R., Jain, J.K., Yadav, V.S., Manupati, V.K., Varela, L. (eds) Recent Advances in Industrial Production. ICEM 2020. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-5281-3_35
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