2. Air flows steadily at a rate og 0.5 kg/s through an air compressor, entering at 7 m/s, 100kPa of pressure and 0.95 m3/kg specific volume and leaving at 5 m/s, 700 kPa and 0.19m3/kg. The internal energy of the air leaving is 90 kJ/kg greater than that of the airentering. Cooling water in the compressor jacket absorbs heat from the air at the rate of58 kW. Compute the work in kW.

Air flow rate through the compressor, m' = 0.5 kg/s velocity of air at the inlet to compressor ,…

Answered: Air flows steadily at a rate og 0.5…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A thermally insulated vessel contains 150 g of water at 0°C. Then, the air from the vessel is pumped out adiabatically. A fraction of water turns into ice and the rest evaporates at 0°C itself. The mass of evaporated water will be closest to (Latent heat of vaporisation of water = 2.10×106 Jkg-¹ and latent heat of fusion of water = 3.36x10³Jkg-¹)
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How much energy must be transferred as heat for a reversible isothermal expansion of an ideal gas at 132 degrees Celcius if the enthropy of the gas increases by 46.0 J/K
A 75 kg person cannot go out for a long time due to Covid-19 restrictions. That's why he rides a bike at home to keep his weight stable. During bicycling, his body produces energy at a rate of about 450 W due to metabolism, 80% of which is converted to heat. The person's body gets rid of all this heat by evaporating water (sweat). How many grams of water must the person's body evaporate in an hour? The heat of vaporization of water at body temperature is 2.42 x 10^6 J/kg.
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4.00 Litres of hydraulic oil is placed in a cylinder with a movable piston, on which a heavy block is placed. The hydraulic oil pressure is maintained at 2.45x105 Pa and the temperature of the oil is raised by 45K. The oil is in the liquid phase and expands by a small amount 1.2x10-3m3. Calculate the work done on the oil and the change in internal energy of the oil. The specific heat capacity of hydraulic oil is 2300J/(kg.K) and its density is 800kg/m3
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Cold water (cp = 4180 J/kg·K) enters the tubes of a heat exchanger with 2-shell passes and 20-tube passes at 20°C at a rate of 3 kg/s, while hot oil (cp = 2200 J/kg·K) enters the shell at 130°C at the same mass flow rate and leaves at 60°C. If the overall heat transfer coefficient based on the outer surface of the tube is 220 W/m2·K, determine (a) the rate of heat transfer and (b) the heat transfer surface area on the outer side of the tube.

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