It is required to concentrate 10 tones/hr of 10% sodium nitrate solution to a final concentration of 60 wt.% using a forward feed triple effect evaporator system. The feed is at 21C and saturated steam is available at 374.5 kPa (gauge). Condensate is maintained under a maximum of 9.59 kPa (absolute) and cooling to the condenser is available at 28C. The heat capacity of the system may be computed using the following equation Cp = 4.175 - 3.762x + 2.166x2 where x is the weight fraction of sodium nitrate. Consider U1=3975 W/m2K; U2=2840 W/mK; U3=1135 W/m2K a) Calculate the evaporation rate in each effect b) Calculate the heat transfer area required (assume equal areas in all three effects and consider 2 iterations) c) Determine rate of steam consumption and the steam economy 7 5 3 3