Q6/ The contents of the stirred-tank heating system shown in Fig. E4.10 are heated at a constant rate of Q(Btu/h) using a gas-fired heater. The flow rate w(lb/h) and volume V(ft') are constant, but the heat loss to the surroundings Q.(Btu/h) varies with the wind velocity v (ft/s) according to the expressions: Q. = UA(T – T.) and U(t) = U + bv²(t) where U, A, b, and Ta are constants. Derive the transfer function between exit temperature T and wind velocity v. List any additional assumptions that you make. %3D

The liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.3 kg / s and has a density of 1000 kg / m³, specific heat 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 25 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter pipe length. a. Find the convection coefficient in the pipe = AnswerW / m² ° C. b. Calculate heat loss per meter pipe length = Answerwatt.

1. Consider a 1000 MW power plant located in a rural area with 15 ton/day SO2 emissions from a 100 m high stack. The velocity and temperature of the stack gases lead to an effective stack height of 50 m above the physical stack. Estimate the ground level concentration as a function of distance downwind under the following conditions. The emissions are into a clear daytime atmosphere with wind (at 10 m) of 5 m/s. b. The emissions are into a clear nighttime atmosphere with wind (at 10 m) of 2 m/s. The conditions of a. except there is a strong elevated inversion at an altitude of 200 m. a. С.

The rate of heat transfer from a body to the surroundings is governed by the following equation: D= hA(Tsur - Tbody) Where dis the heat transfer rate (J/s) h is the heat transfer coefficient A is the heat transfer area (m²) Tsur is the temperature of the surroundings (K) Tpody, is the temperature of the body (K) Find the units for the heat transfer coefficient, h.