Consider a rigid, thick-walled tube that is filled with H2O
liquid and vapor at 0.1 MPa....
Consider a rigid, thick-walled tube that is filled with H2O
liquid and vapor at 0.1 MPa. After it is sealed, it is heated so
that it passes through its critical point. What fraction of the
mass in the tube is liquid?
Q.8. Super-heated steam at 875 K is flowing through a thick
walled tube of stainless tube with inside diameter 40mm and outside
diameter50mm such that its inner wall is heated to a uniform
temperature of 875K.To reduce heat loss, the tube is lagged with
30mm layer of asbestos insulation k=0.2 W/m.K. Calculate the heat
loss using the electrical analogy per metre length if the outer
surface temperature of the insulated tube is 350K.Thermal
conductivity of steel=19 W/m.k.
Two kg of water exist initially as a vapor and liquid at 90°C in
a rigid container of volume 2.42 m3.
(a)At what pressure is the system?
(b)What is the quality of the system?
(c)The temperature of the container is raised to 100°C. What is the
quality of the system, and what is the pressure? What are ΔH and ΔU
at this point relative to the initial state?
(d)As the temperature is increased, at what temperature and
pressure does the...
2. Use MATLAB (ode45) to solve the second-order Euler-Cauchy ODE
given in the thick-walled tube elasticity problem handout for the
case:
?r(1) = 0.1, dur(1)/dr = −0.02
Have your MATLAB code print out the values for the constants you
determined in the general solution; i.e. “C1 = ... , C2 = ...” make
a comparison plot showing your exact solution and the numerical
MATLAB result on the same axes.
A vertical glass tube of length L = 1.280000 m is half filled
with a liquid at 20.000 000 degrees C. How much will the height of
the liquid column change when the tube and liquid are heated to
30.000000 degrees C? Use coefficients alpha_glass = 1.000 000 x
10^-5/K and Beta_liquid = 4.000 000 x 10^-5/K
A rigid 10-L vessel initially contains a mixture of liquid water
and vapor at 100C with 12.3 percent quality. The mixture is then
heated until its temperature is 180C. Calculate the heat transfer
required for this process.
A rigid tank contains 3 kg of subcooled liquid H2O at 50°C. An
electric element in the tank is turned on until the temperature
rises to 95°C, where the H2O is now a saturated liquid on the verge
of vaporizing. The tank is not well insulated, thus 10 kJ of heat
are lost through its walls. Which is the correct energy balance for
this process? Using the appropriate energy balance, determine the
amount of electrical work, We, done during this...
A closed, rigid tank contains a two-phase liquid–vapor mixture
of Refrigerant 22 initially at -20°C with a quality of 47.50%.
Energy transfer by heat into the tank occurs until the refrigerant
is at a final pressure of 6 bar.
a) Determine the final temperature, in °C.
b) If the final state is in the superheated vapor region, at what
temperature, in °C, does the tank contain only saturated vapor?
Consider steam in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa. Saturated liquid exits the condenser at P = 0.008 MPa. The net power output of the cycle is 100 MW.
determine the thermal efficiency of the cycle
Consider a well-mixed tank filled with 200 L of liquid
containing a chemical A at the concentration of 4 mol/L which
decomposes following a first order kinetics RA=k.CA with a rate
constant of k=0.05 min-1 . At t=0 an outlet stream starts to leave
the tank with the flow rate of 5 L/min. After the liquid level
falls to the half of the initial level, an inlet stream with CA=4
mol/L starts entering the tank at a flow rate of...