Liquid food is heated in a tubular heat exchanger. The inner pipe wall temperature is 110 ° C. The internal diameter of the pipe is 30 mm. Product flows at 0.8 kg / s. If the initial temperature of...

Liquid food is heated in a tubular heat exchanger. The inner pipe wall temperature is 110 ° C. The internal diameter of the pipe is 30 mm. Product flows at 0.8 kg / s. If the initial temperature of the product is 7 ° C, calculate the convective heat transfer coefficient. The thermal properties of the product are as follows: specific heat = 3.7 kJ / (kg ° C), thermal conductivity = 0.6 W / (m ° C), product viscosity = 500 x 10-6 Pa s, density = 1000 kg / m³ , the product viscosity at 110 ° C = 410 x 10-6 Pa s.
a. Find the Reynold number = Answer.
b. Find the number Prantl = Answer.
c. Find the Nuselt = Answer number
d. Convection coefficient = Answer W / m² ° C.