Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The temperature at the inlet to the first turbine stage is 1400 K. The expansion takes place isentropically in two stages, with reheat to 1400 K between the stages at a constant pressure of 300 kPa. A regenerator having an effectiveness of 100% is also incorporated into the cycle. The turbine and the compressor each have am isentropic efficiency of 80%. Determine the following:
(a.) the thermal efficiency of the cycle
(b.) the back work ratio
(c) the net power developed
In: Mechanical Engineering
Manufacturing Technology
1. Hot pressing forming (HPF)
(i) what is that
(ii) how its work
In: Mechanical Engineering
In: Mechanical Engineering
In: Mechanical Engineering
A vessel initially containing 1 kmol of CO and 4.76 kmol of dry air forms an equilibrium mixture of CO2, CO, O2, and N2 at 2800 K, 1 atm. Determine the equilibrium composition.
In: Mechanical Engineering
discuss in details scheduled discard tasks
In: Mechanical Engineering
1. What are the essential and desirable requirements of materials for eyeglass?
2. What are the essential and desirable requirements of materials for a disposable water bottle that does minimal environmental harm?
In: Mechanical Engineering
Explain the biggest challenge in maintaining a geothermal power plant.
In: Mechanical Engineering
Research the history of metals. Create a 15-20 slide powerpoint presentation.
The slide should have key points and in depth discussion should be in the notes section.
In: Mechanical Engineering
A steam power plant has two turbines in series which together develop a power output of 25MW. The boiler supplies steam at 80 bar, 500°C to the high-pressure turbine in which there is an enthalpy drop of 420 kJ/kg. The exhaust from the high pressure is at a pressure of 15 bar, at which pressure some of the steam is delivered to an open-type feedwater heater while the remainder is reheated to 450°C. The steam from the reheater is expanded in the low-pressure turbine to a condenser pressure of 0.05 bar and 0.92 dryness fraction. The condensate leaves the condenser at 25°C and is pumped into the feedwater heater at 15bar where it mixes with the bled steam from the high-pressure turbine exhaust. The feedwater leaves the heater at 188°C and is pumped into the boiler. You may neglect the feed pump work.
Calculate the mass flow rates through the high and low-pressure turbines
In: Mechanical Engineering
(Manufacturing Technology)
1. Do a summary what happen to titanic in the aspect of material(body) and the ductile brittle temperature(DBT) of the material
In: Mechanical Engineering
Use Matlab to write the following
1. Write code to determine whether a year is a leap year. Use the mod function. The rules for determining leap years in the Gregorian calendar are as follows:
All years evenly divisible by 400 are leap years.
Years evenly divisible by 100, but not by 400, are not leap years.
Years divisible by 4, but not by 100, are leap years.
All other years are not leap years.
For example, the years 1800, 1900, 2100, 2300 and 2500 are not leap years, but 2400 is a leap year.
2. Solve the following:
a. Use a for loop to determine the sum of the first 10 terms in the series 5k3, where k=1,2,3,...,10. Report your answer to the Command Window.
b. Repeat part (a) without using a loop.
In: Mechanical Engineering
What are the disadvantages and advantages of meter-out and meter-in flow control valves?
In: Mechanical Engineering
Manufacturing Technology
1. Find out at least 3 types method to produce for powder technology
2. Hot Pressing Forming(HPF)
(i) What is that
(ii) How its work
3. What mean by surface energy in sintering
4. What do you mean by inpregnated and infiltration
In: Mechanical Engineering