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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2014006993
pages 433-451

DESIGN, DEVELOPMENT, AND TESTING OF A MODIFIED GREENHOUSE DRYER UNDER CONDITIONS OF NATURAL CONVECTION

Om Prakash
Department of Mechanical Engineering, Birla Institute of Technology, Mesra Ranchi-835215, India
Anil Kumar
Energy Technology Research Center, Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand; Department of Energy (Energy Center), Maulana Azad National Institute of Technology, Bhopal-462003, India

ABSTRAKT

In this paper, the designing, development, and testing of a modified greenhouse dryer under conditions of natural convection have been performed to study the effect of convective heat transfer coefficients, heat loss, coefficient of diffusion, and of the instantaneous thermal loss efficiency factor. In order to minimize the losses, the north wall is made opaque with the help of a mirror. Two sets of experiments were performed. First, a modified greenhouse was kept on the ground and another one was kept on the floor covered with a black plastic sheet. The experimental constant C and exponent n are calculated from the experimental data by regression analysis.


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