--%>
Assignment Help - homework help

Problem on ideal gas law

A stream of steam at 1 bar and 400 K enters a compressor through a pipe with cross-sectional area of 0.1 m2 at a velocity of 5 m/s. The pressure of the outlet stream is at 5 bar, temperature is at 500 K, and velocity is 1 m/s. Assume the steam can be described by the ideal gas law with constant Cp = 2.08 kJ/kg/K for parts (a) and (b) of this problem.

a. Assuming the ideal gas law, what is the mass flow rate at the inlet stream?

b. The compressor is not perfectly efficient, and some heat is lost through it. If 55 kJ/s is the work required to operate the compressor, how much heat is lost through the compressor? Assume water is an ideal gas for this problem.

c. Now, without assuming the ideal gas law, how much heat is lost through the compressor if 55 kJ/s is the work required to operate the compressor?

   Related Questions in Chemical Engineering

  • Q : Mass transfer adsorption how to

    how to calculate amount of ammonia adsorbed per kg of adsobent in ammonia calcium chloride adsorption process?

    		•
  • 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 : 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 heat required for process A

    A steady-state flow process is used to heat methanol in a tank. The incoming stream is at 2 bar and 25 oC and has a flow rate of 5 kg/s. The outgoing stream is at 1 bar, 100 oC. Heating is provided by a heating coil immersed in a tank. Given the

    		•
  • 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 : Estimating solubility of oxygen in water

    The Henry's law constant for oxygen in water is as follows: Temperature, °C                     0              &nbs

    		•
  • 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

    		•
  • Q : Problem on entropy A heater (heat

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

    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 : 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).

    		•