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Hot oil (Cp=2.3 KJ/kg.C) at a rate of 2.5 kg/s enters an adiabatic exchanger at 180 C and leaves at 150 C. Cooling water (Cp=4.18 KJ/kg.C) enters the exchanger at 20 C and leaves at 45 C. Calculate: a) The heat lost by the oil and the cooling water mass flow rate, and b) The entropy generation and irreversibility for this overall process. Take To=25 C.
A gear blank has been successfully hot forged on a mechanical press in a closed die. At the beginning of a new production run
Determine the COP of the heat pump that applies energy to a house at a rate of 4500kj/h for each kW of electric power it draws. Also, determine the rate of the energy absorption from the outdoor air.
, determine the speed of the boy at the instant = 4 . Neglect the size of the limb. When = 0, = 8 so that and are coincident, i. e., the rope is 16 long.
The link BD is a single solid bar with a width x thickness measuring 1.000 in. x 0.50 in. If the pins at A, B and D have a diameter of 0.375 in, determine the average normal stress in link BD when:(b) Fx = 0 and Fy =4.00 kips.
a steel beam of total length 3m is simply supported at the ends by pin-jointed supports a and c. a diagrammatic
a 960 N.m moment is required to straghten a post. if the capacity of a winch puller is 2400N, determine the minimum value to create the specified moment.
Calculate the force required in direct extrusion of 1100-O aluminum from a diameter of 6 in. to 2 in. Assume that the redundant work is 30% of the ideal work of deformation, and the friction work is 25% of the total work of deformation.
Use cold air properties to find the highest cycle pressure, the specific energy added by combustion, and the mean effective pressure.
How the tensile stress and compressive stress result in the moment about neutral axis when the beam fails
Calculate the number of vacancies per cubic meter in gold at 900°C. The energy for vacancy formation is 0.98 eV/atom. Furthermore, the density and atomic weight for Au are 18.63 g/cm3 (at 900°C) and 196.9 g/mol, respectively.
The assessment to design a substation and the associated protection System.
a steel ring of mean diameter 250 mm has a square section 2.5 mm by 2.5 mm. it is split by a narrow radial saw cut. the
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