Answer to Question #256442 in Mechanical Engineering for Gani

Question

A 50% total solids tomato puree is heated by steam as it flows through a steam injection heater (flash heating) at a rate of 500 kg/h. The steam (100% quality) is generated at 169.06 kPa and is flowing to the heater at a rate of 40 kg/h. The specific heat of the solids in the product is 3.2 kJ/kg K and the initial temperature of the puree is 40oC. Assume the specific heat of the solids in puree is not influenced by the heating process. Given: specific heat of water Cp = 4.18 kJ/kg K a. Draw a flow chart for the process with clear labeling. b. Make all necessary assumptions. c. Determine the temperature of the product leaving the heater. d. Determine the total solids content of the product after heating.

Answer 1

$H_s= 2555.70$

$T_s= 115^0c$

temperature of the product leaving the heater

$T_{out}= 112.2^0c$

total solids content of the product after heating $= 35.56$ %