12-5. An air-cycle unit operating on the simple system is designed for the following  
conditions: 15 lb/min of conditioned air, air entering the turbine at 60 psia, cabin
pressure 14 psia, dry-air rated discharge temperature 20 F, and a turbine efficiency of 80 per
cent.
a. At what temperature does air enter the turbine?
b. How much power does the turbine supply to the fan?

Very briefly, give a short no more than one-page (per subject) tutorial (i.e., introduction and problem statement, state-of-the-art, and recent advances) on NO MORE THAN 3 (any three) of the following topics.

Topics:

i) Bio-inspired Mechatronic Systems

ii) Mechatronic Systems for Rehabilitation

iii) Micro and Nano Mechatronic Systems

iv) Mechatronic Systems for Energy Harvesting, Transfer and Storage

v) Social Mechatronic Systems

vi) Mechatronic Systems for Advanced Manufacturing

derive equation of thermal energy balance for fin? also draw figures applicable

Provide a description of the following micro-sensors/actuators fabrication processes:

1.) photolithography

2.) oxidation

3.) chemical vapor deposition

4.) chemical and plasma etching

5.) bulk micromanufacturing

6.) surface micromanufacturing

7.) LIGA process

Provide a description of the materials selection for the following micro-sensors/actuators:

1.) substrates and wafers

2.) silicon compounds such as dioxide, carbide, nitride, and polycrystalline

3.) silicon piezoelectric

4.) gallium arsenide

5.) piezoelectric crystals

6.) polymers

7.) films

Provide a description of the working principles of the following micro-actuators

1.) thermal forces

2.) shape-memory alloys

3.) piezoelectric

4.) electrostatic

Provide a description of the working principles of the following micro-sensors:

1.) chemical

2.) optical

3.) acoustic wave

4.) pressure

5.) thermal

12.2 Compression of Carbon Dioxide

Carbon dioxide (CO2) at 1 bar and 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 10 bar and 520 K. The CO2 is modelled as an ideal gas, and the KE and PE effects are negligible. For the compressor, determine

a) Work input [kJ/kg]

b) Rate of entropy production [kJ/kg?K]

c) The isentropic compressor efficiency

d) T-s diagram of isentropic and real process

MATLAB

The user is supposed to enter either a ‘yes’ or ‘no’ in response to a prompt. The script will print “OK, continuing” if the user enters either a ‘y’, ‘Y’,'Yes', or 'yes' or it will print “OK, halting” if the user enters a ‘n’, ‘N’, 'No', or 'no' or will print “Error” if the user enters anything else.

Code this twice once with if and once with switch:

Then recode the example above to keep prompting until an an acceptable yes or no is entered:

What loop should we use?

what should we intialize?

please generate all code for Matlab

1.Steam is accelerated by a nozzle steadily from a low velocity to a velocity of 210 m/s at a rate of 3.2 kg/s. If the temperature and pressure of the steam at the nozzle exit are 400 °C and 2 MPa, the exit area of the nozzle is:

Select one:

a. 8.4  cm2

b. 10.2 cm2

c. 23.0 cm2

d. 152 cm2

e. 24.0 cm2

2.An adiabatic heat exchanger is used to heat cold water at 15 °C entering at a rate of 5 kg/s by hot water at 90 °Centering at a rate of 4 kg/s. If the exit temperature of hot water is 50 °C, the exit temperature of cold water is

Select one:

a. 47 °C

b. 55 °C

c. 78 °C

d. 42 °C

e. 90 °C

3.Steam is compressed by an adiabatic compressor from 0.2 MPa and 150 °C to 0.8 MPa and 350 °C at a rate of 1.30 kg/s. The power input to the compressor is:

Select one:

a. 302 kW

b. 717 kW

c. 901 kW

d. 511 kW

e. 393 kW

4.Hot combustion gases (assumed to have the properties of air at room temperature) enter a gas turbine at 1 MPa and 1500 K at a rate of 0.1 kg/s, and exit at 0.2 MPa and 900 K. If heat is lost from the turbine to the surroundings at a rate of 15 kJ/s, the power output of the gas turbine is:

Select one:

a. 45 kW

b. 15 kW

c. 60 kW

d. 75 kW

e. 30 kW

5.Refrigerant -134a expands in an adiabatic turbine from 1.2 MPa and 100 °C to 0.18 MPa and 50 °C at a rate of 1.25 kg/s. The power output of the turbine is:

Select one:

a. 46.3 kW

b. 72.7 kW

c. 66.4 kW

d. 89.2 kW

e. 112.0 kW

6.Refrigerant -134a at 1.4 MPa abd 90°C is throttled to a pressure of 0.6 MPa. The temperature of the refrigerant after throttling is:

Select one:

a. 82 °C

b. 80 °C

c. 22 °C

d. 90 °C

e. 56 °C

7.Air is to be heated steadily by an 8 kW electric resistance heater as it flows through an insulated duct. If the air enters at 50°C at a rate of 2 kg/s, the exit temperature of air is:

Select one:

a. 46.0 °C

b. 54.0 °C

c. 50.0 °C

d. 55.4 °C

e. 58.0 °C

4. (30) Water (r = 1000 kg/m³ and µ = 1.12 x 10^-3 Pa-s) is siphoned through a 2mm diameter tube 1m long, with the tube exit 0.5m below the surface of the water. a) Write the governing equation

Simplify to get an equation in V only

Solve for V

Is the flow laminar or turbulent?

USING DYNACAM determine the polynomial equation for a single dwell cam to move a follower as follows

Dwell 0 deg to 100 deg

Rise .625 inches from 100 deg to 200 deg

Fall .625 inches from 200 deg to 360 deg

minimize velocity

DETERMINE THE NUMBER OF BOUNDARY CONDITIONS, THE CONSTANTS, AND THE POLYNOMIAL EQUATIONS FOR THE SVAJ DIAGRAMS

A centrifugal water pump is driven at a speed of 1450 rpm. The pump impeller is of radial type and has an average radius of 50 mm at the vane inlet and a radius of 150 mm at the vane exit. The vane width at inlet and exit are 25 and 10 mm respectively. The vane angles are ?₁ = 50⁰ and ?₂ = 30⁰. Assuming no prerotation at inlet and neglecting all sources of losses, determine

a. the volume flow rate

b. the output fluid power

c. the static pressure rise through the impeller.

Which type of corrosion cell causes iron or steel to corrode (and create rust) when a droplet of water is in contact with the surface? Question 10 options: a) Composition (dissimilar metals) cell b) Stress cell c) Concentration cell