Selected:

Mechanical Engineering homework help

$15.99

$15.99

Design Brief Your task is to design, build and test a prototype double-pipe (i.e. concentric tube) heat exchanger. The objective of the heat exchanger is to cool water which is initially at a temperature of 60 C and flowing at a rate of 1.5 L/min to below 50 C. You have access to a water supply at room temperature (approximately 20 C) and in the interests of conserving water, the flow rate of cold water should be limited to 3.6 L/min (0.06 kg/s). (If it is possible, the flow rate of cold water should be less than this). You have access to a heat exchanger testing module once per week. You will be given a selection of pipes (with various diameters, lengths, etc.) to build your heat exchanger. Before starting construction, you should make predictions of your prototype’s performance in order to choose the most appropriate pipe diameters and lengths. If you conclude that it is not possible to meet the design requirement (e.g. the given pipes are too short), you should still build a prototype heat exchanger with the available materials and your report should recommend the minimum length required to meet the design condition using the pipe diameters you selected. Agreement between predictions and measurements of your prototype’s performance may help convince your boss that your estimate of the required length for the heat exchanger is reliable. One of the technical officers from your company also found a few commercial heat exchangers of different types in the back shed. Your boss requested that (in addition to building your prototype heat exchanger) you should also test these to see if any of them can meet the design requirement. Your report should contain graphs showing the performance of each heat exchanger for different flow rates of cold fluid up to the maximum allowed (i.e. 3.6 L/min). Report Format It is expected your report will be typed using a word processor such as Microsoft Word (apart from any raw data or hand written calculations that you may include in the appendix). You are free to decide the section titles yourself. Keep in mind that the purpose of the report is to communicate clearly and concisely what you did and what conclusions you reached. The report should be approximately 10 pages in length not counting appendixes. An example of a possible format is as follows: Concentric Tube Heat Exchanger Summary Briefly describe (approximately up to half a page) the purpose of the report and the main findings/conclusions of your investigation. Background and Objective Briefly outline the objective and scope of the investigation. It may be a good idea to include a table showing the available pipes – their lengths, diameters and material. Captions/titles for tables usually appear at the top of the table. Table 1 gives an example. You should refer to all tables in the text. e.g.: The prices for the commercial heat exchangers are given in Table 1. Table 1: Commercial Heat Exchangers Tubular heat exchanger $1,850 Plate heat exchanger $2,450 Shell and tube heat exchanger $2,980 Second-hand car radiator (Honda Civic) $390 Theory and Design Predictions You should explain briefly how your calculations were done including any assumptions you have made. Show the equations you used. For example, Eq. (1) shows a good format for equations (it was produced using ‘insert>object>Microsoft Equation 3.0). Nu  0.023Re0.8 Prn (1) In Eq. (1) NuD is the Nusselt number, ReD the Reynolds number and Pr the Prandtl number. This example equation is commonly used for turbulent pipe flow [1, 2]. It may be a good idea to have a picture that describes your model/design. Try to draw it yourself using Microsoft Word or some other software rather than take one from the internet. Fig.1 is an example of a figure. Refer to every figure in the text. Notice that the caption is underneath the figure but for tables the title is usually written as a capt

Mechanical Engineering homework help

Reviews

There are no reviews yet.

Be the first to review “Mechanical Engineering homework help”

Your email address will not be published. Required fields are marked *

Close Menu
×
×

Cart