1- water at 100 degree and quality X=0.8 % has mass 0.1 kg find volume =?
2- R-410 at -10 degree and 100kpa find enthalpy h and energy u
3- water at 200kpa , v = 0.08 m^3/kg find pressure p and Quality x
4- water at 200 kpa , T= 270 degree find specific volume
5- water at p= 1200 kpa , V= 0.18m^3/kg find T,u

At a point in a circular duct with inner diameter of 0.200 m, the flow is fully developed and the air flow average velocity is 10.0 m/s with a mean temperature of 20.0° C. At a point exactly 5.00 m downstream, the mean temperature is 30.0° C. It is known that the wall temperature of the duct was held at a constant temperature between these two points. Find this wall temperature.

Charlie is about to submit tender document for Ministry of Defense, at his home, in conjunction of procurement of 10 unit of Engineer Armored Vehicles.

Based on these Integrated Product and Process Design (IPPD) principles, provide Charlie's justification to support your company strategy to capture the contract.

1. Customer Focus.

2. Concurrent Development of Products and Processes.

3. Early and Continuous Life-Cycle Planning.

4. Proactive Identification and Management of Risk.

5. Maximum Flexibility for Optimization and Use of Contractor Approaches.

Develop Fortran code for double stage pulse tube cryocooler to achieve 20 k temperature using online configuration with regenerative matrix heat exchanger...

Develop Fortran code and plot the results in Sicilian for validation

A mass of 0.3 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 240 kPa.
Initially, 70 percent of the mass is in the liquid phase. Now heat is transferred to the refrigerant at
constant pressure until the cylinder contains vapor only.
(a) show the process on a P-v and T-v diagrams with respect to saturation lines. Determine;
(b) the volume occupied by the refrigerant initially,
(c) the work done, and
(d) the total heat transfer.

A steel tank contains water at ? = 1.00 MPa and ℎ = 3100 kJ/kg. Determine the following:

a. State of the water; ie whether the water is compressed water or saturated water or superheated vapour? (Hint: Use Saturated water—Pressure table to compare ℎ at ? = 1.00 MPa)

b. Estimate the temperature of the water. (Hint: Use Saturated water—Pressure table or Superheated water, depending on the state you find in a)

c. Other properties of water in the tank can be determined knowing just ? and ℎ only. What postulate is this known as?

2. A 1 m3 pressure vessel operating at 500 kPa leaks causing steam to escape at that pressure. The leak was detected 30 mins after it started in which time the amount of liquid in the vessel decreased by 0.0015 m3 . The leak is due to a corrosion that causes a circular hole of radius 5 mm on the surface of the tank. Saturation conditions can be assumed to exist in the vessel. (Hint: Use property table to determine properties at 500 kPa)

Determine the following:

a. Mass flow rate of the steam

b. Exit velocity of the steam

c. Kinetic energy per unit mass of the steam

d. Flow energy of the steam per unit mass

Fluid Mechanics - True or False

1) Reynolds number represents the ratio of viscous force to the inertia force.
2) The entrance length (Le) for turbulent flow is greater than that for laminar flow for the same pipe diameter.
3) Increase the fluid viscosity leads to decrease the turbulence.
4) For laminar steady flow between parallel fixed plates, the pressure drop increase with increasing the thickness of the fluid layer between them.
5) For laminar steady flow for pipe, the pressure drop increase with increasing the pipe diameter.
6) For the same Reynolds number, friction factor for steady laminar flow between parallel plates is greater than that for pipe flow.
7) For turbulent flow, the thickness of viscous sublayer is greater than the thickness of inertial sublayer.
8) Darcy -Weisbach equation can be used for calculating the head of losses for both laminar and turbulent flow.
9) Minor losses important only for turbulent flow.
10) Minor losses for entrance flow conditions is less than that for exit flow conditions.

Only state if its False or True for each point.

A diesel cycle operates at and receives 400BTU of energy from the combustion process. The hot air standard is k=1.3. The diesel engine receives air at a pressure of 14.5psia, 90°F, and 0.55lb. What is the mean effective pressure of the engine? The cut-off ratio is 12% of the volume displacement and the percent clearance is 8%.

A rigid sealed tank contains 0.5 kg R-410a at 0^oC with specific volume 0.01m³/kg. The pure substance R-410a is now heated to a room temperature of 25^oC.

a. Find the volume of R-410a in the tank.              [2]

b. Find the final pressure R-410a in the tank          [2]

c. Find the process heat transfer.

A Diesel cycle engine is analyzed using the air standard method. Given the conditions at state 1, compression ratio (r), and cutoff ratio (rc) determine the efficiency and other values listed below.

Note: The gas constant for air is R=0.287 kJ/kg-K.

Given Values

T1 (K) = 338

P1 (kPa) = 130

r = 14.5

rc = 1.25

a) Determine the specific internal energy (kJ/kg) at state 1.

b) Determine the relative specific volume at state 1.

c) Determine the relative specific volume at state 2.

d) Determine the temperature (K) at state 2.

e) Determine the pressure (kPa) at state 2.

f) Determine the specific enthalpy (kJ/kg) at state 2.

g) Determine the temperature (K) at state 3.

h) Determine the pressure (kPa) at state 3.

i) Determine the specific enthalpy (kJ/kg) at state 3.

j) Determine the relative specific volume at state 3.

k) Determine the relative specific volume at state 4.

l) Determine the temperature (K) at state 4.

m) Determine the pressure (kPa) at state 4.

n) Determine the specific internal energy (kJ/kg) at state 4.

o) Determine the net work per cycle (kJ/kg) of the engine.

p) Determine the heat addition per cycle (kJ/kg) of the engine.

q) Determine the efficiency (%) of the engine.

2.2 kW of power will be trasnmitted via chain-sprocket system. Rotational speed of input shaft is 20 rpm. Required approximate rotational speed of input shaft is 20 rpm. Required approximate rotational speed for the out shaft is 7 rpm. Approximate distance between center lines of input and output shafts should be 900 mm. This chain-sprocket system is used for an elevator and it is asked to use single or multiple DIN 8187 chain with 31.75 mm pitch.

a) Calculate number of teeth on sprocket, which is on output shaft, is number of teeth on the sprocket on input shaft is 19.

b) Calculate input power for selection of chain and select the appropriate chain type.

c) Calculate pitch circle diameters of driving and driven sprockets, linear velocity of chain, length of chain, (number of chain links), and exact center line distance between driving and driven sprocket.

d) Calculate factor of safety of the selected chain.

b) A 15 MW gas turbine plant operates with a two-stage compression and a two-stage

expansion. The high-pressure turbine (HPT) drives both low-pressure compressor

(LPC) and high-pressure compressor (HPC). A low-pressure turbine (LPT) is connected

to a generator for electricity generation The overall pressure ratio is 16/1 and the

maximum cycle temperature, which is at the inlet of the HPT, is 900°C. The gases

leaving the HPT are reheated to 850°C before entering the LPT. Both compressors have

equal pressure ratios with an intercooler between the stages, and the intercooling

process is complete. Air enters the LPC at a temperature and pressure of 27°C and

100 kPa respectively. The exhaust gases leaving the LPT are passed through a heat

exchanger to heat the air leaving the HPC. Thermal ratio of the heat exchanger is 0.78.

The isentropic efficiencies for both compressors and turbines are 85%. The mass of fuel

injected is negligibly small. Assuming that the kinetic and potential energy changes are

negligibly small,

i. sketch the cycle on a temperature-entropy (T-s) diagram,

ii. determine the required air mass flow rate for the gas turbine, kg/s,

iii. determine the thermal efficiency of the power plant, %, and

iv. determine the work ratio.

For air, take cpa = 1.005 kJ/kg.K and γa = 1.40

For gas, take cpg = 1.14 kJ/kg.K and γg = 1.35