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Find the flows and fluxes of exergy in the condenser of Problem 9.29. Use them to determine the second law efficiency, T0 = 15?C.
Problem 9.29
A coal-fired power plant produces 25 kg/s steam at 3 MPa, 600?C in the boiler. It cools the condenser with ocean water coming in at 15?C and returned at 18?C, so the condenser exit is at 50?C. Find the net power output and the required mass flow rate of ocean water.
Radon from well water may pose a radiological health hazard. One treatment technique is simply to hod the water in storage, allowing the radon to decay. The decay rate is first order:
An automobile traveling at 30 miles per hour on level pavement with a coefficient of kinetic friction of 0.6. Weighs 3,000 lb. Sixty percent of its weight is on the front axle and 40% on the rear axle.
Write a program that processes a sequence of lines from a file, displaying a count of the total number of words in those lines as well as counts of words with one letter two letters,and so on .
Suppose that 0.03% of plastic containers manufactured by a certain process have small holes that render them unfit for use. Let X represent the number of containers in a random sample on 10000 that have this defect. Find
The effect of a number of open FWHs on the thermal efficiency of an ideal cycle is to be studied. Steam leaves the steam generator at 20 MPa, 600?C, and the cycle has a condenser pressure of 10 kPa.
A heat engine operating in an environment at 298 K produces 5 kW of power output with a first law efficiency of 50%. It has a second-law efficiency of 80% and TL = 310 K. Find all the energy and exergy transfers in and out.
A steel alloy has a uniaxial yield strength of 580 MPa. Consider this steel to be subjected to only a shear stress τ.
Summarize the project by reporting such things as WHEN and WHERE it was constructed, the SIZE, the CIVILIZATION that built it and the CULTURE that was prevalent at the time, and any other important information concerning this project.
If the system needs $5000 in operating and maintenance costs each year and has a salvage values of $25,000 at Year 10, what is the IRR of this system. If the company wants to earn at least 12% on all investments
Determine the pressure and temperature leaving the diffuser and the ratio of inlet to exit area of the diffuser, assuming the flow to be reversible and adiabatic.
The chain is initially at rest on the rough surface with x = 0 If the coefficient of kinetic friction between the chain and the rough surface is πk determine the velocity v of the chain when x = L. The force P is greater than πkρgL in order to ini..
Consider a cylindrical nickel wire 2.0 mm in diameter and 3 x 10^4 mm long. Calculate its elongation when a load of 300 N is applied. Assume that the deformation is totally elastic.
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