5. A sample stream of dry gas is being withdrawn from a stack. The stack gases are at 200 °C and 730 mmHg. The stream flows through a heated filter, a set of cooled impingers, a small air pump, and them through a flow meter, as shown in Figure 1. The rate of flow is determined to be 30.0 liters/min at 20 °C and 790 mm Hg. a) Calculate the actual volumetric flow rate through the filter (at T = 200 °C and P = 730 mmHg). b) If 1.42 mg of solid particles are collected on the filter in 30 minutes, calculate the concentration of particles in the stack gas (in mg/m³)

The liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.25 kg / s and has a density of 1000 kg / m³, a specific heat of 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.

2. A natural gas is flowing through a 1 m diameter and 6.5 km long pipeline (friction factor= 0.0024) at a constant temperature of 15 °C. The pressure at the inlet of the pipe is 5.7 MPa. What is the maximum mass flow rate of the gas that can be achieved and the corresponding downstream pressure? [Ans. Gmax = 1012.3 kg s-¹, Pw = 498.6 kPa]

A distillation column is separating methanol from water at a pressure of 1.0 atm. The column has a total condenser and a partial reboiler. In addition a saturated vapor stream of pure steam is input on the second stage above the partial reboiler.The feed flow rate is 2000.0 kmol/day. Feed is 48.0 mol% methanol and 52.0 mol% water and is a subcooled liquid. For every 4.0 moles of feed, 1.0 mole of vapor must condense inside the column. Distillate is 92.0 mol% methanol. Reflux is a saturated liquid, and L 0 /D = 1.0. Bottoms is 8.0 mol% methanol. Boilup ratio is =V / B 0.5. As- sume that CMO is valid. Find the optimum feed plate location and the total number of equilibrium stages required.