An ideal Rankine cycle operates with a turbine inlet pressure of 900 psia and a turbine inlet temperature of 572 oF. The steam is isentropically expanded through the turbine to 5 psia as illustrated on the T-s diagram shown below. Using the Mollier diagram, determine the percent moisture at the turbine outlet under these operating conditions. State your answer in whole numbers.
In: Mechanical Engineering
An ideal Rankine cycle operates with a turbine inlet pressure of 600 psia and a turbine inlet temperature of 526 oF. The steam is isentropically expanded through the turbine to 15 psia as illustrated on the T-s diagram shown below. Using the Mollier diagram, determine the enthalpy at the turbine inlet, in BTU/lbm, under these operating conditions. State your answer in whole numbers.
In: Mechanical Engineering
An ideal Rankine cycle operates without superheat (wet cycle) as shown in the following T-s diagram. If saturated steam is expanded from 450 psia to steam with 5 % moisture, use the Mollier diagram and steam tables, as necessary, to determine the pump inlet temperature, in oF. State your answer to one decimal place.
In: Mechanical Engineering
What is Axiomatic Design?
Steps and Application of Axiomatic Design
Example of Axiomatic Design
Link Axiomatic Design to your own experience and real business story to use the tool.
In: Mechanical Engineering
In a curved channel, what causes the asymmetry in the full flow speed profile?
In: Mechanical Engineering
What is the basis of “Design for Maintainability”? When might the principles of Design for Maintainability lead to bad designs when followed without consideration of other principles? Defend your answer with a short example.
In: Mechanical Engineering
During a test a rocket travels upward at 75 meters/second, and when it is 40 meters from the ground its engine fails. Determine the maximum height h reached by the rocket and its speed just before it hits the ground. While in motion the rocket is subjected to a constant downward acceleration of 9.81 m/s2 due to gravity. Neglect the effect of air resistance.
In: Mechanical Engineering
Air enters a window air conditioner at 1 atm, 36oC and 75% relative humidity (??) at a rate of 12m3/min and it leaves as saturated air at 18oC. Part of the moisture in the air which condenses during the process is also removed at 18oC. Determine (a) the rate of heat (Q?) and (b) moisture removal from the air. (c) What-if Scenario: What would the rate of heat removal be if moist air entered the dehumidifier at 95 kPa instead of 1 atm?
In: Mechanical Engineering
Air at 28 °C, 1 bar, 50% relative humidity enters an insulated chamber operating at steady state with a mass flow rate of 5 kg/min and mixes with a saturated moist air stream entering at 4 °C, 1 bar with a mass flow rate of 8 kg/min. A single mixed stream exits at 1 bar. Determine
(a) the relative humidity and temperature, in °C, of the exiting stream.
In: Mechanical Engineering
Five kilograms of steam contained in a 2-m3 cylinder at 40 kPa is compressed isentropically to 5000 kPa. What is the work needed?
Please show correct work.
Answer: 185 kJ
In: Mechanical Engineering
16. List the two elements involved in preparing for maintenance on heat exchangers.
21. List two methods of cleaning the outside surfaces of tubes in a large shell- and-tube heat exchanger
26. Name the four types of plugs used in shell-and-tube heat exchangers to seal leaking tubes
28. Why is maintenance of a smaller heat exchanger done more easily in the shop?
In: Mechanical Engineering
Consider an airplane modeled after the twin-engine Beechcraft Queen Air executive transport. The airplane has the following characteristics: weight is 38,220 N; wing area is 27.3 m2; aspect ratio is 7.5; Oswald efficiency factor is 0.9; and zero-lift drag coefficient CD,0 is 0.03.
1) Calculate the thrust required to fly at a velocity of 725 km/h at standard sea level. Assume the value of ?? = 1.225 kg/m3 at standard sea level. (Round the final answer to the nearest whole number.) The thrust required to fly at a velocity of 725 km/h at standard sea level is _______N.
2) Calculate the thrust required to fly with a velocity of 725 km/h at an altitude of 4.5 km. Assume the value of ?? = 0.777 kg/m3 at an altitude of 4.5 km. (Round the final answer to the nearest whole number.) The thrust required to fly with a velocity of 725 km/h at an altitude of 4.5 km is _______ N.
In: Mechanical Engineering
What is Film blowing?
Describe the lost foam casting process. What is an advantage to lost foam casting?
How is most wrought steel initially produced?
Subject is actually Materials Science/Engineering
In: Mechanical Engineering
What is anthropometry? What are typical measures of anthropometry? What equipment is used? What does the equipment tell us? Why is anthropometry important to study? What is ergonomics?
In: Mechanical Engineering
What is external flow? What is internal flow? What is the Reynolds number? What is its physical interpretation? What are turbulent and laminar flows? Plot the variation of the local heat transfer coefficient for flow over a flat plate
In: Mechanical Engineering