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Problem 6.7:
Steam at 5 bar, 300 °C is condensed to saturated liquid in at 5 bar in a heat exchanger at a mass flow rate of 1 kg/s. Cooling is provided by water, which enters the heat exchanger at 20 °C 1 bar and exits at 60 °C. Neglecting pressure drop in pipes and heat losses to the surroundings, determine the flow rate of the cooling water, the amount of heat that is exchanged, and the rate of entropy generation. Problem 6.8:
Steam enters a cooling tower at 200 °C and exits at 60 °C. Cooling is supplied by the surroundings which are assumed to be at 30 °C. The process takes place under atmospheric pressure (1 bar). a) Calculate the amount of heat removed from the steam. b) Calculate the entropy change of the steam. c) What is the entropy generation? d) Draw a PV graph and show the path of this process.
find the initial and final values of the armature current and speed corresponding to each step.
Question - 1 In an oxygen -nitrogen mixture at 10 atmosphere and 25 oc , the concentration of oxygen at two places 0.2 cm apart are 10 and 20 volume percent respectively. The rate of diffusion of oxygen expressed as g /cm2 -hr for the case of unic..
The speed of the rotor rotating magnetic field with respect to the stator rotating magnetic field in r/min.
How do you write a report about conductometric titration
Suppose 500 mg of dye was introduced into the plasma compartment. After reaching steady state, the concentration in the blood is 0:0893 mg cm3. Find the volume of the plasma compartment
A three-phase, wye-connected, 2300-V, four pole, 1000-kVA, 60-Hz synchronous machine has a synchronous reactance Xs = 5 Ω, a field resistance Rf = 10 Ω, and an approximately linear magnetization characteristic (Ef versus If ) with a slope Kag = 200 Ω..
The atmospheric pressure of 100k Pa acts on the other side of the piston. The gas is heated until the volume is doubled and the final pressure is 500 kPa. Calculate the work done by the gas.
Find the charge per unit length on the inner surface and on the outer surface of the outer cylinder.
A system can be represented by the block diagram below: Derive (write the different steps explicitly. not just the solution!) the closed-loop transfer function relating the set point (Ysp) to the output Y
Consider the following cyclic process carried out in two steps on a gas: Step 1: 45 J of heat is added to the gas, and 10. J of expansion work is performed. Step 2: 60. J of heat is removed from the gas as the gas is compressed back to the initial..
Compound Y has a solubility of 20.0g/100mL in ether.What mass of compound of Y would be removed from a solution of 1.8g of Y in 100mL of water by a single extraction with 100mL of ether?
Plot of the Fermi distribution function at two different temperatures. Calculate the Fermi timction at 6.5 eV if EF=6 .25 eV and T=300 K. Repeat for T=950 K assuming that the Fermi energy does not change. Plot the energy dependence of the ele..
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