--%>
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 : Materials and energy balance you look

    you look up the specific gravity of 96% H2SO4 and find it is 1.858.calculate the weight

    		•
  • Q : Rate of flow of nitrogen The feed to an

    The feed to an ammonia synthesis reactor contain 25 mole% nitrogen and the balance hydrogen. The flow rate of the stream is 3000 kg/hr. Calculate the rate of flow of nitrogen into the reactor in kg/hr. (Hint: First calculate the average molecular weight of the mixture).

    		•
  • Q : Problem on steam flow in a pipe A

    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

    		•
  • Q : Production of ethanol Ethanol (1)

    Ethanol (1) Describe the production of ethanol in Scottish Whisky beverages. Be sure to include a discussion on dangers of impurities (2) Explain the impact of ethanol on the human body (3) List th

    		•
  • 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 : Calculating adiabatic flame temperature

    Calculate the adiabatic flame temperature of acetylenes gas at a pressure of 1 bar under the following conditions. The reactants are initially at 298K. Assume that the acetylene reacts completely to form CO2 and H2O:

    Q : Problem on frictional losses A stream

    A stream of propane is throttled from 4.298 bar and 450 K to 0.22 bar. This process is irreversible due to frictional losses at the nozzle. a. In words or equations, why are frictional losses irreversible?

    Q : Problem on entropy A heater (heat

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

    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 : Matlab/Simulink assignment Modeling eye

    Modeling eye movements is commonly performed in the Matlab/Simulink pacakage. Based on the Physiological evidence, oculomotor plants have been designed to simulate various eye movements. Choose two eye movement models, one for saccades and the other for pursuit, and simulate the following amplitudes

    		•