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A single-effect evaporator is used to concentrate 60000 kg h-1 of a 40 wt % NaOH solution which is fed to the evaporator at 40°C. The concentrated liquid is a 55 wt % NaOH solution. Saturated steam at 3 atm is available for heating. The vapor space in the evaporator is at a pressure of 10 kPa. The overall heat transfer coefficient is 2000 W m-2 K-1. Determine:
a) The amount of vapor produced.
b) The area required for the evaporator. Include clearly values of relevant properties.
c) The economy.
Hard magnetic materials Permanent magnets are used as passive generators of magnetic field. To produce and maintain the magnetic field, a material should have both high resid
two altitudes of an isosceles triangle are equal to 20 cm and 30 cm determine the possible measures of the base angles
explain
Q1 What is wrong with each of the following attempts to write an electron configuration? Justify your answer with suitable explanation. (a) 1s22s3 (b) 1s22s22p23s2 (c) 1s22s23s2 (d
what are the applications of radioactivity in engineering
urea + formaldehyde
how scale form
Draw the B-H curve for a ferro-magnetic material and identify the retentivity and the coercive field on the curve. B-H curve for a ferromagnetic material is drawn a
Pour point: Just as flashpoint when temperature is further lowered below cloud point of certain temperature, oil becomes semi-solid and losses its flow characteristics. This point
Explain the mechanism of ferromagnetism Ferromagnetism is the basic mechanism by which certain materials (like iron) form permanent magnets and/or exhibit tough interactions
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