Change of power in flow of kinetic energy
Air at 20 m/s, 260 K, 75 kPa with 5 kg/s flows into a jet engine and it flows out at 500 m/s, 800 K, 75 kPa. What is the change (power) in flow of kinetic energy?
Expert
m.ΔKE = m.1/2(V2e–V2i)
= 5 kg/s×12 (5002 – 202) (m/s)21
1000 (kW/W) = 624 kW
You can consider air and in these condition the first term of the equation will be cancelled out as there will be no role of enthalpy.
Above is an e.g. Of similar question
The only consideration is of Potential energy and kinetic energy and in the question no mass flow rate is given
PV = RTV = RT/P =8.314*(100+273)/100 =31.0122
Mass Flow Rate, m = V/v = 31.0122/90=.34456
The continuity Equation(Ve2 –Vi2)/2 +g(Ze - Zi)=(Q +W)/m
Also Q = 0
Putting all the values and soling we get
W=1391.17 kw
Please Solve this problem Step by step, and the question is in the images.
1) A steam turbine takes in saturated steam at 300oc and outputs steam at 4 bar. When the efficiency of the turbine is 65%, Evaluate: a. The final composition (vapor vs. liquid) of outgoing steam.b. The
Difference between pressure vessel & column: The Pressure vessels (cylinder or tank) are utilized to store fluids under pressure. If the pressure vessel are design in the form of column to separate the gas at u
Explain difference between the Unilateral and Bilateral Tolerance?
A multimode fiber is used to couple light into a single mode fiber. Both fibers have the same total diameter. Explain the coupling. Use equations, MATLAB, etc. if necessary. If an LED is used to excite a single mode fiber, explain the coupling of light to the fiber? U
Explain advantages and disadvantages of using the LPG in Car?
From Bernoulli's equation we know that presure head + velocity head at inlet and outlet header is same. If so what is ' W' then in the equation ?
Conformance to standards and specifications: These are standards laid down by national and international authorities. For instance, in Canada there is the Standards Council of Canada (SCC). The United States has many standards bodies including MIL (US
what are different alternate sources of energy
For safe turbine operation how many governors are generally required and Why?
18,76,764
1935148 Asked
3,689
Active Tutors
1447925
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!