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Lanjewar, A. M.
- Heat Transfer Enhancement in Solar Air Heater
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Authors
Affiliations
1 Dept. of Mechanical Engineering, M.A.N.I.T., Bhopal-462051, Madhya Pradesh, IN
1 Dept. of Mechanical Engineering, M.A.N.I.T., Bhopal-462051, Madhya Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 3, No 8 (2010), Pagination: 908-910Abstract
This paper presents results of an experimental investigation of heat transfer in rectangular duct with repeated ribs in Wcontinuous pattern. The ribs in W-pattern have been tested for both pointing upstream (W-up) and downstream (Wdown) to the flow. The duct has width to height ratio of 8, relative roughness pitch of 10, relative roughness height of 0.03375, angle of attack of ribs in W-pattern is 45° and Reynolds number ranges from 2300-14000. Roughened wall of the duct is uniformly heated while the remaining three walls are insulated. These conditions correspond closely to those found in solar air heaters. The heat transfer results have been compared with those for smooth ducts under similar flow and thermal boundary condition. Enhancement of heat transfer by providing W-shape roughness is 2.39 times to that of smooth plate for W-down ribs and 2.21 times to that of smooth plate for W-up ribs respectively.Keywords
Solar Air Heater, Heat Transfer And W-shape Rib RoughnessFull Text
References
- ASHRAE Standard 93-77 (1977) Method of testing to determine the thermal performance of solar air heater. American Society for Heating, Refrigeration, and Air- Conditioning Engineering, NY. pp: 1-34.
- Bhagoria JL, Saini JS and Solanki SC (2002) Heat transfer coefficient and friction factor correlations for rectangular solar air heater duct having transverse wedge shaped rib roughness on the absorber plate. Int. J. Renew. Energy. 25(3), 341-369.
- Han JC and Zhang YM (1992) High performance heat transfer ducts with parallel broken and V-shaped broken ribs. Int. J. Heat Mass Transfer. 35(2), 513-523.
- Han JC, Gliksman LR and Rohsennow WM (1978) An investigation of heat transfer and friction for rib roughened surfaces. Int J. Heat Mass Transfer. 21(8), 1143-1156.
- Karwa R (2003) Experimental studies of augmented heat transfer and friction in asymmetrically heated rectangular ducts with ribs on the heated wall in transverse, inclined, V-continuous and V-discrete pattern. Int. Comm. Heat Mass Transfer. 30(2), 241-250.
- Karwa R, Solanki SC and Saini JS (1999) Heat transfer coefficient and friction factor correlations for the transitional flow regime in rib-roughened rectangular ducts. Int. J. Heat Mass Transfer. 42(9), 1597-1615.
- Lau SC, McMillin RD and Han JC (1991) Turbulent heat transfer and friction in a square channel with discrete rib turbulators. ASME J. Turbomachinery. 113, 360-366.
- Momin AME, Saini JS and Solanki SC (2002) Heat transfer and friction in solar air heater duct with V-shaped rib roughness on absorber plate. Int. J. Heat Mass Transfer. 45(16), 3383-3396.
- Muluwork KB, Solanki SC and Saini JS (2000) Proc. 4th ISHMT-ASME heat and mass transfer Conf. and 15th heat and mass transfer conf., Pune. India, pp: 391-398.
- Prasad BN and Saini JS (1988) Effect of artificial roughness on heat transfer and friction factor in a solar air heater. Solar Energy. 41(6), 555-560.
- Prasad K and Mullick SC (1983) Heat transfer characteristics of a solar air heater used for drying purposes. Appl. Energy. 13, 83-93.
- Sadik K, Shah RK and Aung W (1987) Handbook of single phase convective heat transfer. Wiley, NY.
- Taslim ME, Li T and Kercher DM (1996) Experimental heat transfer and friction in channels roughened with angled, V-shaped and discrete ribs on two opposite walls. J. Turbomachinery. 118, 20–28.