Two parallel thin sheets are placed 2 cm apart. The sheets are squares of sides 5 m. Temperature of both sheets are constant with one at ?! = 15 °? and the other at ?! = -120 °?.

The emissivity of surfaces can be assumed to be 1.

Determine the rate of heat transfer between the plates assuming the gap between the plates is:

a. Vacuum

b. Filled with air at atmospheric pressure (air is not moving)

c. Please state any assumptions you make in your calculations

Thermal conductivity of air at 1 atm is 0.0223 W/m · °C Thermal conductivity of superinsulation is 0.00015 W/m · °C

Illustrate various Air Cargo Scheduling Problems (ACSP) with appropriate examples taking any imaginary route/data of your choice (500-600 words).

A 3-mm-diameter and 12-m-long electric wire is tightly wrapped with a 1.5-mm-thick plastic cover whose thermal conductivity and emissivity are k 5 0.20 W/m·K and « 5 0.9. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop of 7 V along the wire. If the insulated wire is exposed to calm atmospheric air at T` 5 30°C, determine the temperature at the interface of the wire and the plastic cover in steady operation. Take the surrounding surfaces to be at about the same temperature as the air. Evaluate air properties at a film temperature of 40°C and 1 atm pressure. Is this a good assumption?

Water is flowing through a pipe having the diameter 200 mm and 100 mm at sections 1 and 2 respectively. The rate of flow through the pipe is 35 liters per second. The section 1 is 6000 mm and section 2 is 4000 mm above the datum line. If the pressure at the section 1 is 0.4 N/mm², find the intensity of pressure at section 2.                                                            

a. Briefly describe (with the use of diagrams) the Brayton’s cycle and derive the formula for
the coefficient of performance for the Brayton’s cycle
b. A Bell-Coleman refrigerator operates between pressure limits of 2 bar and 14 bar. Air is drawn from the cold chamber at 100C, compressed and then it is cooled to 32OC before entering the expansion cylinder. Expansion and compression follow the law pv1.35 = constant. Calculate the theoretical C.O.Pof the system
ForairtakeƳ=1.6,CP =1.205kJ/kgK andPV1.23=C

The change of the motor moment (Mm) and the resistance moment (Md) in a 2? period machine with a conservative force field are as follows.
?? = 100? / ?, 0 ≤ ? <? (Nm)
?? = 200 - 100? / ?, ? ≤ ? <2?
?? = 50, 0 ≤ ? <2?
The average speed of the machine is 100 rad / s and the variable part of the moment of inertia is ?? = (0.003) sin (2?). If the speed unevenness is 1% and the current flywheel value is 0.4 kgm ^ 2, find the flywheel amount that should be added to the machine.

estimate the aerodynamic drag force of a typical passenger aircraft and a fighter aircraft at design point

a) Sketch and describe in detail a simple single pass composite boiler.

b) Explain its operation and state two advantages.

c) Sketch a biological sewage treatment plant, label it and explain its operation.

d) State five conditions under which oily water can be discharged overboard

develop an efficient approach for heat recovery and cogeneration the system should be unique and the idea is not being used by anybody else it should be free from copyright you are supposed to discuss commercially available waste heat recovery devices and how your system is different than the existing the proposed system should be unique and should not be used earlier draw the schematic explain the features and the proposal of 8 pages

carry out steady state and dynamic simulation of plate heat exchanger for to Facebook share using 41077 your study should deal with the steady state and dynamic simulation of the plate fin heat exchanger its in like it should in light and some aspect of the modelling of such a complex system in a transient and especially the impact of the numerical treatment illustrate application and sketch the importance of dynamic studies in complement with steady state

1. a What are the most important aspects to be considered in preparing reliability specifications?

b Write an outline reliability specification for (i) a domestic TV set, (ii) a fighter aircraft, and (iii) a gearbox bearing.

Mark the following statements as True or False.

1) Substitutional vacancy atoms are present in the region of the dislocation where compressive stresses are present.

2) If the Burgers vector of a screw dislocation is along the y - direction, then displacements surrounding the stationary screw dislocation are also in the same direction.

3) External tensile stresses generates vacancies in the material when edge dislocations are present.

The research is to be carried out to analyse the performance of evaporative cooler model with simple surfaces and honeycomb structured using R 290/R410 c with blend mixture. it is to be tested over the 25% load, 50% load, 75% load and 100% load conditions....
First propose a unique arrangement for the testing rig. and then formulate a mathematical model using fortran 77 performe simulation of the system and validate the results using available standard results......

coding is to be done in the Fortran 77 only. no other software will be entertained...

Air undergoes a polytropic process in a piston–cylinder assembly from p₁ = 1 bar, T₁ = 295 K to p₂ = 9 bar. The air is modeled as an ideal gas and kinetic and potential energy effects are negligible.

For a polytropic exponent of 1.2, determine the work and heat transfer, each in kJ per kg of air,
(1) assuming constant c_v evaluated at 300 K.
(2) assuming variable specific heats.

W/m = -187.211 kJ/kg

Q/m= -93.563 kJ/kG

Determine the heat transfer, in kJ per kg of air, assuming variable specific heats.

Apply systems thinking as a methodology to how you intend investigating and assessing your Power Generator Speed Breaker product, following, and documenting all the 7 steps to Systems Engineering (SE). By taking your product through the stages of systems engineering, Conceptual Design, Preliminary Design, and Detail Design and Development.