Very cold water (5°C) is heated at atmospheric pressure (1 atm)
until saturated vapor is formed.
(a)
Draw an enthalpy path for the water.
(b)
Calculate the specific enthalpy change (kJ/mol) for each step in
the path, and calculate the total specific enthalpy change
(kJ/mol).
(c)
Compare the total enthalpy change from the enthalpy path to the
total enthalpy change using the steam tables (see zyExample in
another section).
(d)
Compute the ratio of latent heat to sensible heat.
(e)...
A mass of 5kg of saturated water vapor at 150 kpa is heated at a
constant pressure until the temperature reaches 200 C. Calculate
the work done by the steam during this process?
Liquid water at 15 ℃ is heated by mixing it with saturated steam
at the same pressure. Liquid water enters a chamber at a rate of
4.3 kg/s and saturated steam enters at a rate of 0.17 kg/s. The
mixture leaves the mixing chamber as a saturated liquid at 40℃. If
the surroundings are at 15℃, determine (a) the temperature of the
saturated steam entering the chamber, (b) the exergy destruction
during this mixing process, and (c) the second-law efficiency...
A mass of 5 kg of saturated water vapor at 150 kPa is heated at
constant pressure until the temperature reaches 200°C, the the
boundary work in KJ is done by the steam during this process is
closest to?
A 2-m3 rigid insulated tank initially containing
saturated water vapor at 1 MPa is connected through a valve to a
supply line that carries steam at 400°C. Now the valve is opened,
and steam is allowed to flow slowly into the tank until the
pressure in the tank rises to 2 MPa. At this instant the tank
temperature is measured to be 300°C. Determine the mass of the
steam that has entered and the pressure of the steam in the...
In a non-ideal Rankine cycle saturated vapor (x=1) enters the
turbine at 8.0 MPa and saturated liquid water (x=0) exits the
condenser at a pressure of Pexit. Pexit = 0.006 MPa. The net power
output of the cycle is given as 100 MW. Knowing that the isentropic
efficiency of the pump is 0.85 generate the following plots
in Excel or in similar programs for the given range of the
isentropic efficiency of the turbine. (Please submit your Excel
sheet or...
Saturated water vapor has a flow rate of 1.5 kg/s and a pressure
of 0.51 bar. The vapor is to be completely condensed to saturated
liquid in the shell of a shell-and-tube heat
exchanger. In this case, the water vapor enters and the water exits
at the same temperature, which represents a case with infinitely
high m_dot * Cp for this condensing steam application. On the tube
side, city water is used as the cold fluid. The city water enters...
In an intermediate superheated steam cycle, water vapor is 4 MPa
pressure, 440 oC high, isentropic and 0.80 high
After entering the pressure turbine, it expands to 0.4 MPa and the
intermediate superheater is again up to 440 oC.
it is heated and enters the low pressure turbine, whose isentropic
efficiency is also 0.80. 40 oC from condenser
The fluid that works as a saturated liquid at temperature is
pressed into the boiler with a pump with an isentropic efficiency...
What is the total vapor pressure in atm of a solution created by
combining 2.32 moles of toluene and 6.56 moles of benzene at 350K?
At 350K Pvap, toluene = 0.33 atm and Pvap,
benzene = 0.95 atm