Refrigerant 22 passes into a device operating at steady state with a single inlet and two outlets. The flow at the device inlet has a pressure of 60 lbf/in2, a temperature of 40°F, and a velocity of 2 ft/s. The inlet has an area of 2 ft2. The flow at the first outlet has a pressure of 60 lbf/in2, a temperature of 120°F, and a velocity of 3 ft/s. The first outlet has an area of 1 ft2. The flow at the second outlet has a temperature of 120°F. The device consumes 70 hp of power. Determine the mass flow rate in lb/s and pressure of the flow in lbf/in2 at the second outlet. Assume the device is well-insulated and neglect kinetic and potential energy changes.

please donot copy and paste i will rate you negative .. take care of sign of work and explain in details

At the beginning of the compression process of an air standard Otto cycle, p₁ = 1 bar, T₁ = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of V_d = 2.2 L. Determine per cylinder:

c)    the heat addition per cycle, in kJ.
d)    the heat rejection per cycle, in kJ.
e)    the net work per cycle, in kJ.
f)     the thermal efficiency.

g)    the mean effective pressure, in bar.

1. Steel is the material that has been chosen for a small link in the fuel injection mechanism in a space vehicle. Which steelmaking process would probably be used to manufacture the steel for this application?

2. You are involved in the design and construction of a new-steel -making factory. Which steel-making process would you incorporate into this new plant? How would the geographic location of the plant affect the selection of the process?

A spring loaded piston cylinder contains 1.5 kg of air at 27°C and 160 kPa. It is
now heated in a process where pressure is linear in volume, P = A + BV, to twice the
initial volume where it reaches 900 K. Find the work, the heat transfer and the total
entropy generation assuming a source at 900 K. Is this a possible process?

The following description applies to the next three problems.

Air enters steadily an electrical hair dryer at 100 kPa and 27 C. It leaves the hairdryer at a temperature of 80 C, an exit velocity of 10 m/s, and at the same pressure. The exit and inlet areas are 20 cm² and 40 cm² respectively.

(Assume properties of air cp= 1.007 kJ/kg.K, cv = 0.72 kJ/kg.K, and R= 0. 287 kJ/kg.K )

The mass flow rate of air entering the hairdryer, in kg/s, is closer to

The velocity of the air at the inlet of the hairdryer, in m/s, is closer to

The total power the hairdryer needs to operate at the stated conditions, in kW, is closer to:

1.A materials fatigue resistance can be improved by

2.What test is used to determine the toughness of a material under shock loading?

3.Martensite

I need sample lab report for method of joints

Steam at 5MPa and 300°C enters a turbine in a steady flow manner, from the turbine the steam expands to 200kPa with a quality of 90%. Find the following:

1. The work done by the steam to the turbine in kj/kg
2. The amount of steam flow rate needed in kg/hr if the turbine produces 200kW of power
3. The efficiency of the expansion process

Topic: Agitation

A flat-blade turbine agitator with disk having six blade is installed in a tank. The tank diameter (D_t) is 1.83 m, the turbine diameter (D_i) is 0.61 m and the width (w) is 0.122 mm. The tank contains four baffles, each having width (J) of 0.15 mm. The turbine operate (N) at 90 rpm and the liquid in tank has a viscosity (u) of 10 cP and a density (p) of 929 kg/m³. It is desired to design a small pilot unit with a vessel volume (V) of 2.0 L so that effects of various process variables on the system can be studied in the laboratory. The rate of the mass transfer appear to be important in this system so the scale-down should be on this basis. Design the new system specifying sizes, rpm and power.

Include all calculations and graphs if possible . Thank you.

A company is considering two methods for obtaining a certain part. Method A will involve purchasing a machine for $40,000 with a life of 5 years, a $2,400 salvage value, and a fixed annual operating cost of $8,000. Additionally, each part produced by the method will cost $8. Method B will involve purchasing the part from a subcontractor for $30 per part. At an interest rate of 10% per year, determine the number of parts per year required for the two methods to break even. (Enter your answer as a number without the dollar $ sign.)

Polymer-matrix composites (PMCs) which consist of strong fibers embedded in a
resilient plastic that holds them in place are used in the greatest diversity with
applications ranging from commercial aircraft to bath tub. Comment the main drawback
of fiber reinforced PMCs compared with metallic materials.

1. Describe the effect of composition and temperature on the equilibrium structure of aluminum alloys containing up to 8% copper?

2. Explain the precipitation hardening of aluminum copper alloys by reference to the heat treatment cycles.

3. Compare the mechanical properties of aluminum 4% copper alloy in the as – cast, solution treated, quenched, quenched and aged and over aged conditions.

For the case " Insulated process plant piping (carbonsteel) " define in details the material aspect and environment aspect. Environment is not limited to chemistry but also to process parameters.

Subject = Materials Integrity and Corrosion

can you me 5 entropy sources can be found in house and how to lessen those 5 entropy generation

*can you give me