Saturated steam at 10 bar pressure is supplied to increase the temperature of the feed natural gas from its inlet temperature of 30°C to within 15°C of the steam outlet temperature. All steam properties can be verified in the steam table, attached. Evaluate the mass flow rate of the steam supplied, if about 20% of the steam is still uncondensed at the exit. The relevant properties of Natural gas (NG) are as follows: NG Flow Rate = 1500 kMol/hour Average specific heat Capacity of NG = 40 kl/kMol.°C.

Required information Carbon dioxide enters an adiabatic nozzle at 1200 K with a velocity of 70 m/s and leaves at 400 K. Assume constant specific heats at room temperature. Determine the Mach number at the inlet. The gas constant of carbon dioxide is R = 0.1889 kJ/kg-K and k = 1.288. The Mach number at the inlet is

Problem 3 – Sparky needs helium for an experimental project.  The helium is stored in a storage tank at 20°C and 300 kPa.  The helium exits through a converging nozzle to the environment (100 kPa atmospheric pressure) and has 10 mm exit diameter.  Determine the exit flow rate of the helium.  Helium’s ratio of specific heats is 1.667.  This is a compressible flow problem.  Only use equations and tables from the textbook to solve this problem.  Note the figures in the textbook and textbook appendices are based in air, not helium, and are not valid for this problem.