--%>
Assignment Help - homework help

Problem on steam flow in a pipe

A stream of steam at 15 bar and 300 oC is used to produce work using a steam turbine.

a. Before the turbine, steam flows in a pipe (4 cm in diameter) at a mass flow rate of 3 g/s. Calculate the mean velocity in the pipe in m/s.

b. The output stream after the steam turbine is 175 oC, 1 bar. Calculate the amount of work produced per second. Assume the steam turbine is well insulated (adiabatic) and is entirely horizontal. You may assume that the change in kinetic energy kinetic is negligible.

c. Now calculate the work produced by the steam turbine without neglecting the change in the kinetic energy. The pipe for the output stream has a 4 cm diameter. How different is your result from part (b).

   Related Questions in Chemical Engineering

  • Q : Calculating flow rate of nitrogen The

    The feed of an ammonia synthesis reactor is 25% (lbmole) nitrogen with the balance hydrogen. The flow rate is 3000 kg/h at 65°C and 95 bar. Calculate the flow rate of nitrogen to the reactor in kg/hr.

    		•
  • Q : Draw a flow diagram and annotate the

    Cumene is produced by the vapour phase reaction of benzene with propylene. The fresh feeds have the following compositions: Benzene: 99% w/w benzene, 1% w/w toluene Propylene: 98% v/v propylene,

    		•
  • Q : Hh to determine the temperature that

    to determine the temperature that occurred in a fire in a warehouse, the arson investigator noticed that the relief valve on a methane storage tank had popped open at 3000 psig, the rated value. Before the fire started, the tank was presumably at ambient conditions and the gage read 1950 psig. If th

    		•
  • Q : Problem on entropy A heater (heat

    A heater (heat source temperature = 527 K) and turbine are connected in series as shown below:

    Q : Calculate the pressure Calculate the

    Calculate the pressure at the bottom of a column of Ethanol 100 ft high using a pressure (force) balance in American Engineering Units.

    		•
  • Q : How to balance Chemical Reaction

    Consider a chemical reaction: a CH3-CH=CH2 + b NH3 + c O2 → d CH2=CH-C≡N + e H2O 1.  &

    		•
  • Q : Bsc what is the latent heat of

    what is the latent heat of vaporization for hexane

    		•
  • Q : Problem on flow rate of natural gas

    Natural Gas is flowing through a 10 inch schedule 40 pipe. The gas is at 109°F and 7.3 psig. The outside air temperature is 92°F. If the flow rate of the gas is 8,000 SCFM: What is the flow rate in lb/hr?

    		•
  • Q : Problem on laboratory solution You are

    You are asked to make up a laboratory solution of 0.10 molar H2SO4 from concentrated (96%) H2SO4 at 56°F. The barometric pressure reads 750 mmHg. You look up the specific gravity of 96% H2SO4 and find it is listed at 1.858. Calculate: (a) th

    		•
  • Q : I need to solve the material and energy

    I need to solve the material and energy balance for the att.

    		•