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The floor space of any facility that houses shell-and- tube heat exchangers must be sufficiently large so the tube bundle can be serviced easily. A rule of thumb is that the floor space must be at least 2.5 times the length of the tube bundle so that the bundle can be com- pletely removed from the shell (hence the absolute min- imum floor space is twice the tube bundle length) and subsequently cleaned, repaired, or replaced easily (asso- ciated with the extra half bundle length floor space). The room in which the heat exchanger of Problem 11.22 is to be installed is 8 m long and, therefore, the 4.7-m-long heat exchanger is too large for the facility. Will a shell-and-tube heat exchanger with two shells, one above the other, be sufficiently small to fit into the facility? Each shell has 10 tubes and 8 tube passes.
a steel pipe of 12-in. outer diameter is fabricated from 14in. thick plate by welding along a helix which forms an
strarting from x 0 with no initial velocity a particle is given an acceleration a 0.1 squere root v216 where a
a strain-rate dependence test is conducted on samples of al 6061-t6. two identical bars are tested. the first bar is
Many of the solid surfaces for which values of the thermal and momentum accommodation coefficients have been measured are quite different from those used in micro- and nanodevices.
Moist air at 45?C and relative humidity 30% (State 1) with another stream of moist air at 20?C and relative humidity 50% (State 2) in an adiabatic duct. Mass flow rate of dry air is 0.8 kg/s at section 1 and 1 kg/s at section 2. The mixed stream (Sta..
the cost per hour of running a ship at a speed of v knots is pound 4 v3 2048. find the speed which makes the cost of
Atoms are 1-dimensionally aligned with an inter atomic distance of 10nm. Let’s assume that the positive charge of the nucleus of the atom is infinitely large so that electrons are confined to a specific atom. Then, what wavelength photons are require..
What are the units of A - Write an expression for the rate of butane destruction, d[C4H10]/dt - What are the final pressure and temperature of the system when the system reaches steady state, in each case (dry air, air with H2O)?
round your final answers to three decimal places. the liquid leaving the condenser of a 115000-btuh heat pump using
The barrel and tube are filled with water (to the top of the tube). Calculate the ratio of the hydrostatic force on the bottom of the barrel to the gravitational force on the water contained in the barrel. Why is that ratio not equal to 1.0? (You ..
a power generator burns natural gas consisting of 30 ethane 60 methane and the balance nitrogen. the gas undergoes
A “Pumpkin Chucker” design for the annual Punpkin Chunkin competition held near Millsboro, Delaware every fall (first week of November) uses a pneumatic launcher (air cannon) to throw its pumpkin. It is important to know if your “ammunition”, the pum..
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