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Sodium hydroxide solution is to be concentrated from 10% to 30% by weight using a single effect evaporator operating at atmospheric pressure, The liquid circulates through a calandria consisting of 1 m long tubes 32 mm OD and 28 mm ID. Dry saturated steam is circulated through a calandria at 394 K. If the overall heat transfer coefficient is 1.75 kW m-2 how many tubes will the calandria require to concentrate 0.075 kg s-1 of dilute solution?
The specific heat of the solution can be assumed to be constant at 4.18 kJ kg-1 K. The latent heat of evaporation is 2270 kJ kg-1 for the feed and steam, the boiling point rise is 15 K. The feed temperature is 303 K.
The fire department proposes to approach the truck from the upstream side and heavily spray the truck with water to prevent an explosion. Will this help to reduce the chlorine concentration downstream?
A homogeneous coarse sand deposit has a water table at 10 m depth. The water coefficient of permeability of the sand is found to vary significantly with height above the water table even though the sand deposit is homogeneous.
A solution containing 30% methanol (by mol) is flashed to 1 bar, 70.82°C. Determine the phase of the system; if 2 phases, report the compositions and relative amounts of each phase.
The concentration of CO2 is 400ppm what is the equivalent concentration in ug/m^3 at temperature of 22C & pressure of 103.198 kPa.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid.
Assume: Suspended solids in effluent negligible Wastage is from aeration tank Yield coefficient = 0.4 Bacterial decay rate = 0.04 1/d Effluent BOD5 = 10mg/L F/M = 0.33 mg/mg*d BOD5 after primary settling = 150mg/L MLVSS = 1700mg/L MLSS = 1.4(MLVSS..
A client has engaged your consultancy company to undertake a conversion of a warehouse to a residential dwelling in the northern city of Darwin. You are required to check the capacity of a proposed column to ensure it can support a mezzanine floor..
The regulatory agency has told the company to maintain a salt level pf no greater then 250 mg/L downstream of the discharge. what should the removal efficiency. (percentage of the salt removed) of a process designed to remove salt from the waste w..
The velocity of a particle traveling along a straight line is v=(3t^2-6t) ft/s , where t is in seconds. if s=4ft when t=0 determine the position of the particle when t=4s what is the total distance during the time interval t=0 to t=4s
If this two-step process is replaced by a single isothermal expansion of the air from 800 K and 4 bar to some final pressure P, what is the value of P that make the work of the two processes the same
Zwango Plus Manufacturing experts that fixed costs of keeping its Zephyr Hills Plant operating will be $1.4M this year. If the fixed costs increase by $100,000 each year, what is the EUAC for a 10-year period Assume the interest rate is 12%.
A rectangular plate 5ft by 4ft is at an angle of 30 degrees with the horizontal, and the 5-ft side is horizontal. Find the magnitude of the force on one side of the plate and the depth of its center of pressure when the top edge is (a) at the wate..
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