Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric flow rate of 3 m³/s and expands adiabatically to an exit state of 1 bar, 160°C. Kinetic and potential energy effects are negligible.


Determine for the turbine:

(a) the power developed, in kW.

(b) the rate of entropy production, in kW/K.

(c) the percent isentropic turbine efficiency.

Regarding Fused Deposition Modeling (FDM) process, answer the following questions with a detailed explanation:

1. How and why temperature, pressure/force, and time impact the following quality issues:

- Surface finish

- Dimensional accuracy

2. ?Identify and explain the reason behind the key processing limits relevant to the FDM process that are based on:

- Limits of the material being processed

- Limits of the equipment being processed

a.) What is the thermal efficiency of a steam power plant operating on the Rankine cycle if saturated steam is supplied to the turbine at 1000 psia, and the condenser is at 1 psia. Use a turbine efficiency of 95% and a pump efficiency of 85%. Refer to Chapter 9, Sections 10-11, as necessary.

b.) Determine the thermal efficiency if the steam is superheated to 1000 F, assuming all else equal.

Derive the electromagnetic wave equation in terms of the magnetic field H

Briefly describe what a duct blowers function is as it applies to residential energy audits

You and your teammates will construct a Concept Map that clearly illustrates how to use the "steam tables" (A-4 through A-7 in SI units) to find the thermodynamic properties and/or determine the phase of water. Your maps should include the following concepts (at a minimum): ? All 5 phases discussed in class on Monday, 4/16. Include information for how to deal with a compressed liquid at a pressure of less than 5 MPa. ? The Dome (include at least one of the diagram) ? Saturation Pressure ? Saturation Temperature ? Quality ? If we wanted to use USCS, how would that change the situation? ? If R134a was the working fluid, how would that change the situation?

At what distance ‘X’ will the carbon concentration in a steel specimen be 0.70 wt. % after 10h at 1100 0C, if the starting composition was 0.35 wt. % C and the surface concentration is 1.35 wt.% C?

how do you get x/2sqrt(DT)=0.66085?

Carbon Dioxide is being generated in an occupied space. Each person breathe out carbon

dioxide at the rate 0.0107 cfm. Outdoor air with CO2 concentration of 280 ppm is being

supplied to the space at the rate of 6000cfm. It is desired to keep the concentration level of

CO2 in the space below 1000 ppm. Assuming the room is complete mixing condition,

determine how many person could occupy the room and not exceed the desired CO2 level.

(1 ppm = 1 part per million = 1Å~10-6 per unit volume)

The critical dimension on a machined hole must be 0.5025 in. The machining process can reliably create holes with a known standard deviation of 0.005 in. A random sample of 15 holes has an average diameter of 0.5062 in.

(a) With 97.5% confidence can you conclude that the mean hole diameter is larger than 0.5025 in?

(b) At what confidence level would you change your conclusion? What is the term for the alpha value that is associated with that value?

A simple Rankine cycle is operating between the 12.5 MPa on the high pressure side and 9.93 kPa on the low pressure side. The temperature entering the turbine is 550 degrees Celsius. Find the quality exiting the turbine and the overal thermal efficiency.

A.How to manufacture ceramics of complicated dimension features (i.e., cellular, porous, scaffold) since they cannot be machined or cut?

B. How to print metal materials at room temperature? (open questions, think about phase diagram and check periodic table)

I had to teardown a stapler and figure out how all the part wor together, bit cant seem to get how it all works together , like involving the sprngs and everything.

this is the question i need help with:

How do the parts work together? (of a stapler)

This question related to thermodynamics.

With a throtteling valve in a refrigiration system h₁ = h_2.  

If h₁ = h₂ and only pressure is changed by a throttling valve then why can't an ideal gas be used? Why do refrigerants need to be used?

One-quarter kilogram of air is compressed in a piston-cylinder device from 350 K and 150 kPa to 550 K and 900 kPa. Determine

a. The entropy change, in KJ/K.

b. The direction of any heat transfer by using the entropy balance.

c. What-if scenario: If this process occurs adiabatically, is this process reversible, irreversible, or impossible process? Please answer the nature of this process and why.

The tow hitch is held in place by a retaining pin that is designed to fail before the fasteners between the tow package and the vehicle frame fail. The tow package is designed for 6,000lb as applied to ball hitch. You are tasked with designing the shear pin (retaining pin) for the hitch and have been asked to consider towing the trailer through different gradients up to a maximum of 15%. Determine the internal normal and internal shear on the tongue of the hitch (square tube behind the ball) for various gradients between 0% and 15%. Plot these internal loads with respect to increasing gradient.