Answer to Question #126676 in Mechanical Engineering for Irvin

Question

The suction lift of a double acting reciprocating pump is 3.6m, the suction pipe length is 5m of
110 mm diameter tubing with f=0.01(Darcy). The cylinder diameter is 160mm and the piston
stroke is 400mm. Assume simple harmonic motion is considered. The vapour pressure is 2.4m
(absolute) and atmospheric pressure is 10.3m. (Hint: Consider at start of stroke)
1.1. Sketch the indicator diagrams to aid you in your calculations.
1.2. Determine the maximum speeds at it can be run under the following conditions:
(a) No air vessel on the suction side. (Ignore friction for (a))

(b) A large air vessel on the suction side close to the pump.

Answer 1

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