Abstract
This paper presents an experimental study on the effects of initial concentration on the critical heat transport rate of an osmotic heat pipe operated under atmospheric pressure. In this experiment, an aqueous polyethylene glycol 600 solution was used as the working fluid and 18 tubular acetyl cellulose membranes were used as the osmotic membranes. The initial concentration was varied between 0.1 to 1.0 kmol/m3 in 0.1 kmol/m3 steps. Consequently, the existence of an optimum initial concentration for the critical heat transport rate was revealed. In addition, solution concentrations in the solution riser and downcomer were found to be related to the initial concentration and solvent contact height. © 1999 Scripta Technica, Heat Trans Asian Res, 29(1): 59–71, 2000
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