A surface condenser deals with (13625 mathrm{~kg}) of steam per hour at a pressure of (0.09 mathrm{bar}).
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A surface condenser deals with \(13625 \mathrm{~kg}\) of steam per hour at a pressure of \(0.09 \mathrm{bar}\). The steam enters 0.85 dry and the temperature at the condensate and air extraction pipes is \(36^{\circ} \mathrm{C}\). The air leakage amounts to \(7.26 \mathrm{~kg} /\) hour. Determine:
(a) The surface are required if the average heat transmission rate in \(4 \mathrm{~kJ} / \mathrm{cm}\) per second.
(b) The cylinder diameter for the dry air pump, if it is to be single acting and running at \(60 \mathrm{rpm}\) with a stroke-bore ratio of 1.25 and volumetric efficiency of 0.85 .
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