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A hot fluid at 200 °c enters a heat exchanger at a mass flow rate of 10000kg/hr. It's specific heat is 2000j/kg°c. It is to be cooled by another fluid enters at 25°c with a mass flow rate 2500kg/hr and specific heat is 400 j/kg°c. The overall heat transfer coefficient based on outside area of 25m^2 is 250W/m^2°c. Find the exit temperature of the hot fluid when the fluid are in parallel flow and counter flow
A machine component is subjected to fluctuating stress that varies from 40 to 100 N/mm². The corrected endurance limit stress for the machine component is 270 N/mm². The ultimate tensile strength and yield strength of the material are 600 and 450 N/mm² respectively. Find the factor of safety using
(i) Gerber theory
(ii) Soderberg line
(iii) Goodman line
Also, find the factor of safety against static failure.
f(A,B,C,D)=€m(0,1,4,7,11,12,13,15)+d(3,6,10)
Construct the cumulative distribution function of problem b
An ideal Otto cycle has a compression ratio of 9. Using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 60 kW of power
A solution of washed raw cane sugar is coloured by the presence of impurities. It is to be decolourised by the treatment with an adsorptive carbon in a contact filtration plant. The data for an equilibrium isotherm is given below. The original solution has a colour concentration of 9.6 measured on an arbitrary scale and it is desired to reduce colour to 10% of its original value
Kg carbon/kg solution:
0.001
0.004
0.008
0.02
0.04
Colour units /kg solution
9.6
8.6
6.3
4.3
1.7
0.7
Convert the data to a suitable form for plotting the equilibrium isotherm and determine the quantity of fresh carbon required per 1000 kg of solution for a two stage counter-current operation?
Explain briefly with step by step process?
Draw a diagram showing a mathematical model for the centre of gravity of the crane lifting the cylinder with the arms fully extended to the side and raised 10 degrees from the horizontal, with cable is holding the cylinder 0.5m below the end of the arm.
1.)A 20lbm object is located 300 ft above the ground. What is the potential energy of the object in lbf-ft, BTU, and cal?
2.)A mole of a certain ideal gas was inside a container. The gas has a temperature of 70°F and a pressure of 20 psi. Find the volume of the gas in m^3.
An inventor claims to have developed a heat
engine that receives 700 kJ of heat from a source
at 500 K and produces 300 kJ of net work while
rejecting the waste heat to a sink at 290 K. Is this
a reasonable claim? Why?
Find the values of Cp and ᵞ for a gas whose gas
constant is 0.324 kJ/kg K and Cv = 0 84 kJ/kg K.
If 2.25 kg of this gas with an initial volume of
1.15 m3 undergoes a process during which its
pressure remains constant at 7 bar and its
temperature becomes 280‘C at the end of the
process, calculate: (a) the change in internal
energy, (b) the change in enthalpy, (c) the
transferred heat, and (d) the work done.
