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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1525

Title: Effect of size and material of a semi-cylindrical condensing cover on heat and mass transfer for distillation
Authors: Tripathi, Rajesh
Tiwari, G N
Keywords: Distillation
Heat and mass transfer
Purification of brackish water
Issue Date: 2004
Citation: Desalination, 166, 231-241
Abstract: The rate of distillate depends mainly on operating temperature, shape and material ofthe condensing cover. Further, it is important to study the behaviour of heat and mass transfer relations as a function of operating temperature, shape and material. For the present study two sizes of semi-cylindrical condensing covers with characteristic dimensions of 0.14 cm and 0.07 cm were used. The materials most common for condensing covers for distillation used were aluminium and copper. The studies were carried out under controlled environmental conditions. The operating temperature kept during the experiments was between 40°C to 80°C for both forced as well as natural mode. It was observed that the convective and evaporative heat transfer coefficient depends strongly on operating temperatures. The following results at operating temperatures of 40°C to 80°C were obtained: (1) there is an increase of about 15% in the evaporative heat transfer coefficient due to the size of the condensing cover; and (2) there is an increase of about 7.5% in the evaporative heat transfer coefficient due to a change in material.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1525
Appears in Collections:Energy Studies [CES]

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