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1. Plot the quantities calculated in parts (a) through (c) of Problem 10.43 versus the compressor pressure ratio ranging from 3 to 6. Repeat for compressor and turbine isentropic efficiencies of 90%, 85%, and 80%.
2. An ideal Brayton refrigeration cycle has a compressor pressure ratio of 6. At the compressor inlet, the pressure and temperature of the entering air are 20 lbf/in.2 and 4608R. The temperature at the inlet of the turbine is 7008R. For a refrigerating capacity of 15 tons, determine
(a) the mass flow rate, in lb/min.
(b) the net power input, in Btu/min.
(c) the coefficient of performance.
an insulated rigid tank is divided into two chambers by a membrane. chamber a has a volume of 3 ft3 and intially
an elastic exercise band is grasped and then is stretched. knowing that the tension in portion de of the band is 70
a gate is 0.5 m wide and 0.6 m tall and is hinged at the bottom. on one side the gate holds back a 0.5 m deep body of
a stream of refrigerant-134a at 1 mpa and 12 c is mixed with another stream at 1 mpa and 60 c. if the mass flow rate of
In this project we consider two very different problems. First, we design cylindrical shells subjected to hydrostatic pressure. We consider two possible modes of failure, i.e. the loss of stability and failure due to the loss of strength. The seco..
A water pump is required to pump 0.23ft3/sec of water at 60F at atm up to 100psi gage. of the pump has an estimated isentropic efficiency of 50%, determine the power required (HP) to drive the pump.
consider a rocket engine that burns hydrogen and oxygen. the combustion chamber temperature and pressure are 3800 k and
herzberg specifically classed salary as a hygiene factor not a motivator. how does salary fit in with maslows
The thermal-energy capacity of the lake is very large
Determine the initail volume
Consider combustion of hydrogen in pure oxygen under constant pressure in a two-inlet and single-exit reactor. The reactants enter the reactor at temperature T1 = 200 K. The products leave the reactor at temperature T2 = 2000 K. No work is developed ..
an electronic instrument is to be isolated from a panel that vibrates at frequencies ranging from 25 hz to 35 hz. it is
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