Chemical facilities use compressed air to operate pneumatic valves. The air (taken at ambient conditions during the TX summer) is compressed to 90 psig before distributing throughout the plant. If the compressor tank is a horizontal cylinder (2 ft diameter and 6 ft long), what is the SCF of air and the partial pressure of each gas inside the tank. (Assume ideal gas)

2. In order to remember the difference between macroscopic and molecular scale energies, I ... Answer:

7.40. The cart in Fig. 7.38 has a mass of 2000 kg. It is resting on frictionless wheels on a solid, level surface and encounters no air resistance. At time zero it is standing still, and a jet from a fire hose is used to start it moving. The mass flow rate of the fluid from the fire hose is 100 kg / s, and its velocity relative to fixed coordinates is 50 m/s. The cup on the rear of the cart turns the jet around so that it leaves in the -x direction with the same velocity relative to the cart with which it entered. Calculate the velocity-time behavior of the cart; assume the jet is unaffected by gravity. (This is not a very practical problem, but it is analogous to the more complex and interesting problem of starting a large turbine from rest. All such turbines must be occasionally shut down for maintenance; their starting and stopping behavior is more complex than their behavior running at a steady speed.)

2. ESP. Estimate the overall width, length and height for a 99.4% ESP treating 30,000 m3/min of gas. With an actual collection area of 5400 m2, plates available are from 6-10 meters and 2 meters long. Use typical values for a plate height, channel width, gas velocity, and aspect ratio. 3 FABRIC FILTER From the following test data estimate the values of K. and K. for the

answers [Ans: total plate area  5433.4 m2 ; number of plates = 48 ]   related slides included, show working to reach answers

Compare and give examples of direct acting and reverse acting controllers.