Food and Nutrition

  FN 450/650 Food Engineering (3 cr.)Food and Nutrition   Homework 3 Due: October 24, 2017 1. Calculate the specific heat and thermal conductivity of lean pork containing 8.0% fat, 1.5% ash, 20% protein, and 70.5% water (3 points). 2. A flat stainless-steel plate 2.0m length2.5m width and thickness 0.05m has one face at 150C, while the other face is at 20C.  The thermal conductivity of stainless steel is 15.8W/mC.  Calculate the rate of heat transfer by conduction (in Watts) through the plate (3 points). 3. A cold storage wall (4m x 4 m) is constructed of 40 cm thick concrete (thermal conductivity = 13.7 W/m oC). An insulation (thermal conductivity = 0.04 W/m oC) of 40 cm thickness was provided to reduce the heat loss. The inside surface temperature of the wall is 4oC and outside wall temperature is 40oC. Calculate the heat transfer rate through the wall (4 points).