Reference no: EM13964622
The thermal characteristics of an engine are being monitored on a dynamometer. Analysis of the coolant water shows that after 30 minutes the engine has lost 36MJ of heat energy. The area of active heat transfer for the coolant side of the engine is 0.84m^2, the coolant temperature in the cylinder head is 102?C and the cylinder head temperature on the coolant side is 118?C.
1. Determine the rate of heat transfer for the engine.
2. Calculate the convection coefficient (h) for the transfer of heat from the cylinder head to the coolant water in the engine.
3. If the distance from the coolant to the combustion chamber of the engine is on average 23mm, the average surface area is 0.57m^2 and the conduction coefficient for the cylinder head material is 212W/mK, determine the average temperature of the walls of the combustion chamber.
4. If the cycle averages cylinder temperature is measured to be 440?C and the convective heat transfer area is 0.3m^2 determine the convection coefficient for the transfer of the heat from the combustion gasses to the cylinder walls.
5. If the engine was fitted with a steel head, k = 72W/mK, by how much would the coolant temperature of the engine be changed?
6. If the cylinder walls are coated in Zirconia, k = 1.3W/mK to a thickness of 0.5mm, what would be the new cylinder materials maximum temperature?
7. List and explain the assumptions you have made when carrying out these calculations.
8. There are two mechanisms of heat transfer considered in these calculations, discuss what part, if any, heat transfer through radiation plays in each of the scenarios considered above.
|
What is the overall hypothesis of this experiment
: What is the overall hypothesis of this experiment? Why did the researchers speculate that EVOO could improve post-prandial glycemic control via an oxidative stress-related mechanism? Did the paper explain what the control subjects received in lieu of..
|
|
User interface of the product and not on the core technology
: For what types of products would the initial focus of the concept generation activity be on the form and user interface of the product and not on the core technology? Describe specific examples.
|
|
Terms of appearance-functionality and durability
: Evaluate the quality of the shoes you are wearing in terms of appearance, functionality and durability,
|
|
Computer support for concept generation activities
: What are the prospects for computer support for concept generation activities? Can you think of any computer tools that would be especially helpful in this process?
|
|
Determine the rate of heat transfer for the engine.
: There are two mechanisms of heat transfer considered in these calculations, discuss what part, if any, heat transfer through radiation plays in each of the scenarios considered above.
|
|
Sub problem prevent fraying of end of rope
: Generate 20 concepts for the sub problem “prevent fraying of end of rope” as part of a system for cutting lengths of nylon rope from a spool.
|
|
Program to find the sum of all the multiples
: Write a program to find the sum of all the multiples of 3 or 5 below N. for example: If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
|
|
Find the sum of all the multiples
: Write a program to find the sum of all the multiples of 3 or 5 below N. for example: If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
|
|
Determining the terms in the fibonacci sequence
: By considering the terms in the Fibonacci sequence whose values do not exceed N, find the sum of the even-valued terms.
|