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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.
Use calculus to obtain a closed-form solution for the case where the parachutist jumper is initially at rest (v=0 at t=0) to solve F(upward)= -cv^2, where c = a second-order drag coefficient (kg/m).
A project that will cost $750,000 will require payments as certain milestones are met. The initial payment is $50,000. When 30% of the work is complete an additional payment of $200,000 is due. When 70% of the work is complete another payment of $..
a vertical piston-cylinder assembly contains 0.3 kg of air k1.4 r287 jkgk initially at 155 kpa and 27 degree c. the is
the inner and outer surfaces temperatures of a 0.5-cm thick 2-m x 2-m window glass in winter are 100c and 30c
an engineering student considers using a fan as a levitation demonstration. she plans to face the box-enclosed fan so
a rectangular loop of wire with sides 0.19 and 0.32 m lies in a plane perpendicular to a constant magnetic field see
assume that the flow of air through a given duct is isentropic. at one point in the duct the pressure and temperature
Find the maximum shear stress in a 5 1/2 in-diameter circular saw blade if it runs idle at 5000 rev/min. The saw is 14 guage(0.0747 in) steel and is used on a 5/8 in-diameter. The thickness is uniform. What is the maximum radial component of stress?
solve using the ideal-gas law the generalized compressibility factor and steam tables. compare the specific volume of
Plot a graph showing the trend of the insulation thickness vs. the reduction percent - Determine the adequate thickness.
How can we rotate a disc hanged with weights freely without external effects other then gravitational force cont?
Heat loss from an insulated pipe, a standard schedule 40, 2-in. steel pipe (inside diameter 2.067 in. and wall thickness 0.154 in.) carrying steam is insulated with 2 in. of 85% magnesia covered in turn with 2 in. of cork. Estimate the heat loss p..
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