What is the rate of entropygeneration assuming the surround

Assignment Help Civil Engineering
Reference no: EM13546924

1.Steam expands in an turbine operating in steady-state conditions with a mass flow rate of 40,000 kg/hr. The steam enters the turbine at 8 MPa and 500 C, and exits as a saturated vapor at 40 kPa. If the power generated by the turbine is 8.2 MW, what is the rate of entropy generation, assuming the surrounds are at 25 C?

2.A sealed insulated room contains 90 m^3 air at 12 C and 100 kPa. A container with 45 kg of water at 95 C is placed in the room. After heat transfer between the air and water, thermal equilibrium is reached. Assume constant specific heats at 300 K and no chane in the room air pressure. Calculate: a. The final temperature of the air and water. b. The amount of heat transferred from the water to the air. c. The entropy generated.

Reference no: EM13546924

Questions Cloud

What is the 95% confidence interval and the standard : Suppose we want to estimate the average weight of adult males in greater metropolitan Atlanta area. We draw a random sample of 1,000 men from a population of 1,000,000 men and weigh them. We find that the average man in our sample weighs 180 pounds, ..
Nitrogen expands in a friction-less piston-cylinder device : Nitrogen expands in a friction-less piston-cylinder device from 0.10 to 0.30 m^3. The process is described by P= 7.4 - 40v + 60v^2 , where P is in bars and V is in cubic meters. Determine the work in kJ.
What is the final temperature of the water : A piston-cylinder device contains 2 kg saturated water vapor at 600 kPa. The water expands adiabatically until the final pressure is 100kPa. And 1,465 kJ work is produced.
Does the second law require that the decrease in entropy : An insulated system contains two solid blocks in contact with each other; one hot and the other cold. After heat transfer over some time,thermal equilibrium is established in the container.
What is the rate of entropygeneration assuming the surround : Steam expands in an turbine operating in steady-state conditions with a mass flow rate of 40,000 kg/hr. The steam enters the turbine at 8MPa and 500 C, and exits as a saturated vapor at 40 kPa. If the power generated by the turbine is 8.2 MW, what is..
What is the rate of cooling for the refrigerator : Some skin divers go as deep as 50m. What is the gage pressure at this depth in fresh water, and what is the ratio of the absolute pressure at this depth to normal atmospheric pressure? assume T=20 degrees celcius
Design a concrete column of 14 ft high to support a dead : Design a concrete column of 14 ft high to support a dead load of 80 kips and a live load of 200 kips? f'c= 6,000 psi fy= 60,000 psi
Calculate the required downpayment and monthly payments : Terry wants to purchase a used car for $8000. The dealer offered to finance the deal at 8.5% APR for 4 years with 10% down payment. Terry's bank will provide a loan at 7.8% for 3 years,
Requires you to compile an annotated bibliography : This assignment requires you to compile an Annotated Bibliography

Reviews

Write a Review

Civil Engineering Questions & Answers

  Specific gravity of solids in this soil

The total volume of a soil specimen is 120 cm3 and its total mass is 220g. Specimen porosity is 0.4 and specific gravity of solids is 2.66   Determine the following: (a) water content, (b) void ratio, (c) degree of saturation, and (d) dry density.

  What are the inputs needed to determine stress a polymer

What are the inputs needed to determine stress a polymer with a fixed end on one side, and the other with a tension force of 50,000 lbs a year after the load is applied

  Find probability that specimen will contain detectable level

The article "Leachate from Land Disposal Residential Construction Waste" (authored by W.J. Weber, Y.-C Jang, T.G. Townsend, and S. Laux, Journal of Environmental Engineering, 128(3): 237 - 245, 2002) presents a study on contamination

  Determine the minimum horsepower input to the pump

A pump delivers 60 degrees F water at 2000 gpm through a vertical pipeline 300 ft high. Find the minimum horsepower input to the pump. Assume that atmospheric pressure exists at both the pump inlet and the pipeline outlet.

  Determine how many gallons of water are contained in tank

A spherical water tank has a diameter of 10 ft. Determine how many gallons of water are contained in the tank if the tank is filled to a depth of: a) 1 foot of water measured from the bottom of the tank b) 3 feet of water measured form the bottom o..

  Determine how much did the entropy increase

A computer CPU chip consists of 50 g silicon,20g copper, and 50 g polyvinyl chloride (plastic). It heats from 15?C to 75?C as the computer is turned on. How much did the entropy increase

  What is the equivalent amount in year 10 of an expenditure

What is the equivalent amount in year 10 of an expenditure of $5,000 in year one, $8,000 in year two, and increasing by $1,000 per year through year 10 Assume the interest rate is 10% per year.

  Calculate the quality of the steam exiting heat exchanger

A chemical plant uses a tube-­within-­a-­tube counterflow heat exchanger to heat air with the use of steam. During steady state operation, the air flows into the exchanger at a rate of 5,000 kg/h and a temperature of 27C and exits at a temperature..

  Determine the required capacity of the motor of the

A step-type escalator as shown is designed to transport 120 persons per minute at a constant speed v=1.5 ft/s. The overall efficiency of the escalator is estimated to be 70%, and a 200% overload is to be allowed. Assuming that the average weight per ..

  Calculate the length and diameter of the reaction zone

Calculate the length and diameter of the reaction zone of an afterburner that treats 2000 acfm of polluted air (measured at 250 F). The gases in the after burner are at a temperature of 1400 F for a residence time of 0.50 sec.

  Determine the effective size as well as the uniformity

Determine the effective size as well as the uniformity coefficient and coefficient of curvature for each soil. Determine also the percentages of gravel, sand, silt, and clay according to (a) ASTM, (b) AASHTO, (c)USCS, and (d) the British Standard.

  Determine time at which collar starts to slip relative to it

The coefficient of static friction between the collar of mass m=2 kg and the bent bar is Us=0.35, and the collar is initially d=70 cm from the spin axis AB. Assuming the motion starts at t=0, determine the time at which the collar starts to to sli..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd