Physics

Physics, 22.06.2019 06:20, lolweapon

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

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Engineering, 19.07.2019 21:20, jacamron

Atwo-stage air compressor operates at steady state, compressing 10 m^3/min of air from 100 kpa. 300 k, to 1200 kpa. an intercooler between the two stages cools the air to 300 k at a constant 5. pressure of 350 kpa. the compression processes are isentropic. calculate the power required to run the compressor, in kw, and compare the result to the power required for isentropic compression from the same inlet state to the same final pressure. draw the schematic, the p-v, and the t-s diagrams.

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Engineering, 22.08.2019 00:30, NJSX54661

Atwo-stage double-acting compressor operating at 200 rpm takes in air at 1.013 bar and 27 °c. the size of the l.p. cylinder is 350 x 380 mm; the stroke of h.p. cylinder is the same as that of the l.p. cylinder and the clearance of both the cylinders is 4%. the l.p. cylinder discharges the air at a pressure of 4.052 bar. the air passes through the intercooler so that it enters the h.p. cylinder at 27 °c and 3.85 bar, finally it is discharged from the compressor at 15.4 bar. the value of n in both cylinders is 1.3, cp = 1.0035 kj/kg k and r = 0.287 kj/kg k, calculate: (i) the heat rejected in the intercooler; (ii) the diameter of h.p. cylinder; (iii) the power required to drive the h.p. cylinder.

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Engineering, 14.09.2019 05:30, treseanthegreat

Air is compressed at 100 kpa and 300 k up to 300 kpa in the first stage of a double stage compressor. at the exit of this first stage the air enters a refrigerator where it cools down to 300 k before entering the second stage of the compressor from which it leaves at 1000 kpa. it considers steady state and that the compression processes are isoentropic. determine: 1. output temperature of the second stage of the compressor (k) and work spent on each stage of the compressor per unit mass (kj / kg). 2. if the compression had been carried out in a single stage, how much greater would have been the work spent by the compressor? (%)3. heat transferred in the refrigerator per unit of mass (kj / kg) and variation of entropy in the refrigerator (j / kg · k). 4. refrigerator pressure value (kpa) corresponding to the minimum work spent by the compressor. 5. find an expression for the total work spent by the compressor per unit mass (kj / kg) based on the refrigerator pressure (assuming the conditions of the compressor's inlet and outlet pressure are known, and with an outlet temperature of refrigerator equal to the compressor inlet). 6. draw all the air states on the p-v and t-s diagrams.

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Chemistry, 25.09.2019 01:00, LaBreeska

Atwo-stage compressor has water-jacketed cylinders and a water-cooled intercooler. the compressor takes in 500cfm of free air at 14.7psia at 80°f and discharges it into a receiver in which the pressure remains constant. cooling water flows through the jacket and the intercooler at the rate of 4gpm, the water at 80°f leaving at 120°f

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