Estimate the clean filter headloss for a proposed new sand filter using the sand. Use the following assumptions: loading rate is 216 m³/d.m², specific gravity of sand is 2.65, the shape factor is 0.82, the bed porosity is 0.45, the water temperature is 10°C, and the depth of sand is 0.5 m. Sieve No % retain d(mm) 8-12 7.3 12-16 17.1 1.42 16-20 14.6 20-30 20.4 0.714 30-40 17.6 0.0505 40-50 11.9 0.0357 50-70 5.9 0.0252 70-100 3.1 0.0178 100-140 0.7 0.0126

What are the four elements of corrosion cell ? Give brief description for each of the element.

A 4-m high and 6-m-wide wall consists of long 15-cm x 20 cm cross section horizontal bricks (k of 0.69 W/m K) separated by 2-cm thick plaster layers (k of 0.2 W/m K). There are also 2-cm-thck plaster layers on each side of the brick and a 3-cm-thick rigid foam (k of 0.025 W/m K) on the inner side of the wall. See figure below. The indoor and the outdoor air temperatures are 18 and -8oC, respectively. Convective heat transfer coefficient for inside and outer surfaces are 8 and 22 W/m2 K, respectively. Assume 1-D heat transfer. Neglect radiation. assume any plane wall normal to the x-direction is isothermal, draw the thermal circuit and calculate the heat transfer rate through the wall

Represents and describes by means of a diagram the main parts of the evaporation equipment.