Water at 15°C enters a tube of 2 cm of diameter with flow rate 3953 kg/h. Assume the ratio L/D >10, and the wall temperature is constant at 80◦C. The outlet temperature is 50°C The properties of water at the film temperature are density rho = ? = 985 ?/?3, specific heat ?p = 4180 ?/?, conductivity ? = 0.651 ?/?, dynamic viscosity mu= ?? = 4.71 × 10−4 ?/?, At the wall temperature of 80°C we have dynamic viscosity muw= ?? = 3.55 × 10−4?/?

1. Calculate the average velocity, ?

2. Calculate Reynolds number ?e?

3. Determine the flow regime

4. Calculate Prandtl number ?r

5. Calculate the rate of heat transfer, ?

6. Calculate the mean temperature ??

7. Calculate Nusselt number ?u?

8. Calculate convection heat transfer coefficient ℎ

9. Calculate the length of the tube ?

10. Calculate the ratio ?/D

A stainless steel (AISI 316) tube used to transport a chilled pharmaceutical has an inner diameter of 30 mm and a wall thickness of 3 mm. The pharmaceutical and ambient air are at temperatures of 6oC and 23oC, respectively, while the corresponding inner and outer convection coefficients are 400 W/m2 K and 6 W/m2 K, respectively.
(a) What is the heat gain per unit tube length?
(b) What is the heat gain per unit length if a 10-mm thick layer of calcium silicate insulation (k = 0.050 W/m. K) is applied to the tube?

List and elaborates 5 advantages and disadvantages of hybrid engine for automotive application. Prepare a short essay of your finding.

Check section W 14 X 132 for the column C1 subjected to the following loads Pu= Mux= Muy= Let Lb = [ 10 ] ft (Base Plate) Then Design the Base Plate for the W-Shaped Column C1 consider the axial load only (ignore My & Mx). The column C1 section is [W 14X 132] and it is subjected to a factored axial compression load Pu= [280 + 6 ] kips. Assume concrete compressive strength 4 ksi , Fu (steel plate )=58 Ksi , fy=50 Let Lb = [ 10 ]

Air is expanded isentropically in an adiabatic turbine, to produce 135 kW of power. If the mass flow rate is 0.75 kg/s, and the air at the exit is 500 K and 305 kPa, then what is the temperature and pressure at the inlet of the turbine?

(a) The temperature is K.

(b) The pressure is kPa.

NOTE: Do NOT approximate the air as having a constant specific heat.

The following problem description applies also to the next two problems.

A piston-cylinder device contains 2 kg of a saturated liquid mixture at an initial state 1 with p₁= 100 kPa and x₁= 0.8. The water is heated at constant pressure until its final state 2 with volume V₂ = 1.947V₁.

Its initial volume, in m³/kg, is closer to:

Its final temperature, in ^oC, is closer to:

The amount of heat supplied to the steam during the expansion process, in kJ, is closer to:

List the Electric equipment used in Testing and Maintenance of Alternators. Discuss each equipment.

Explain ductility, strength and elastic modulus. Explain and compare these for ceramics and metals.

A door is closed under the control of a spring and dashpot. The spring gives a torque of 13.5 Nm when the door is closed and has a stiffness of 50 N.m/rad. The dashpot gives a damping torque of 100 N.m.s/rad. The moment of inertia of the door about its hinges is 90 Kg.m2. Derive an expression for the motion of the door if it is opened 90o and released and find approximately the time it takes to close

Write a report on AI based Social distancing monitoring using drone with out human interaction report should contain drone design it specification it's algorithm control system algorithm.minimum 10 A4 size page.No plagiarism is allowed other wise down rate is given

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?