ENGR 553 Heat Transfer

Design Project (individual)

The objective of this project is to design a removal (daily removal) window insulation thermal system for

residential homes. First you are to consider the heat gain (loss) through a single window pane. Next, you

are to consider the heat gain (loss) through a double window pane system. These two scenarios form the

baseline system to which your design will be compared (and hopefully improved upon). The conditions

are for a Mississippi (Oxford) summer and winter and you are to consider the following values for the

windows:

Window width Window height Pane thickness Gap

Single Pane 30” 73” d = ¼” N/A

Double Pane 30” 73” d1 = d2 = ¼” = 0.5”

As well as the following environmental data:

Interior Temperature Ti = 70oF

Exterior Temperature (Winter) To = 18oF

Exterior Temperature (Summer) To = 96

oF

Wind Speed v = 18 mph

Consider that this home has eleven of these windows. How much energy is gained (lost) through the

windows every month. You are to consider all modes (conduction, convection – both forced and free, and

radiation) of heat transfer as coupled with temperature dependent properties. A complete design report is

due on the day of the final examination. You are to consider these conditions prevail for a summer period

which is 4 months long (30 days per month) and a winter period of the same length. Your report must

include a section on each of the following:

1) Introduction

2) Problem Statement

3) Engineering (show equations)

4) Economics (pay-back period; – $0.12/kwh)

5) Aesthetics (style, etc.)

6) Reliability

7) Manufacturability

8) Social Impact (psychology, environment, political, etc.)

9) Ethics

10) Safety/Health

11) Summary (key conclusions)

Report Format Outline

A. Title page. The top half of this page should contain the project title, your name, the instructor’s name,

and the course number and title. The lower half of this page should contain the abstract. (title approximate

length of 12 words or less)

B. Abstract. The abstract is an abbreviated statement of the problem and the main results of the project. It

provides a quick overview for the reader who is not sure from the title whether the topic is of direct

interest. Brief, major results should be stated. (Abstract approximate length of 150 words)

C. Introduction. The introduction should place the problem in context. Where appropriate it should give

background, historical development (references to previous work of others), and the relevance of the

problem. It should conclude giving the brief organization of the report. Descriptive sketches are

appropriate to put engineering problem in context.

D. Statement of the Problem. This section provides a non-mathematical description of the problem with

appropriate sketches to clearly describe the physical problem for the reader.

E. Analysis. This section provides an engineering, mathematical description of the problem. The

mathematical equations should be presented such that an engineering reader can follow the mathematical

description. Appropriate sketches to clearly describe the mathematical problem for the reader should be

included.

F. Results. This section should contain a detailed discussion of the project results from both a “what” and

“why” perspective. Tables and/or graphs should be included where appropriate. Any special problems

encountered should be noted. Factors which might affect the accuracy of the data should be commented

on. Tables and graphs must be labeled with engineering units clearly identified. Results will include Rvalue

information for various configurations (single pane, double pane – with and without your design)

and both with and without radiation heat transfer. The results must also include a “sub-section” on each of

the following:

i. Economics (pay-back period; — $0.12/kw-hour)

ii. Aesthetics (style, etc.)

iii. Reliability

iv. Manufacturability

v. Social Impact (psychology, environment, political etc)

vi. Ethics

vii. Safety/Health

G. Conclusions and Recommendations. This section will include important conclusions which can be

drawn from your project results. Recommendations for future improvements can also be made.

H. References. This section will include the citation information for references cited in the report.

References will include books, journal papers, and internet materials. Internet references should be

avoided as much as possible since internet references tend to not be permanent archival information.

I. Appendix. The appendix should contain material which is relevant to the project, but would clutter up

the main body of the report and interrupt the main flow of thought. This includes such things as tedious

mathematical derivations; also listings of computer programs developed for the project are included here.

Items in the appendix should be cited in the body of the report.

Construction of Figures and Tables

1. Figures should be constructed as neatly as possible on the appropriate graph type. Generally, for

figures not constructed on log-log or semi-log paper, standard graph type (5” high by 4” wide)

should be used. Portrait format is preferable to landscape presentation.

2. Each figure must have a title and figure number (located at the bottom of the figure) and must be

referred to in the text of the report. Figures are to be about 4 inches wide and 5 inches tall with

labeled axes and appropriate tick marks along the figure border; the border is to be a closed box.

Each figure is to stand alone on a page of its own.

3. Borders: Borders for all figures should be drawn within the borders of the graph, i.e., coordinate

axes, etc.

4. Computer must be used for graphs. (MS EXCEL or MatLab))

5. Symbols: Data points must be designated by symbols such as those available on templates.

Computer template symbols should be used to depict these symbols on the figure.

6. Curve Labeling: All curves should be appropriately labeled (annotated) either by specifying a

curve for experimental data by defining the symbol in a legend or by indicating as close to the

curve as possible the expression used to define the curve.

7. Label the origin on all coordinate axes.

8. Label axes appropriately with symbols and engineering units.

9. Identify axis units clearly.

10. Tables should be done in MS WORD or MS EXEL with the title at the top of the table. Portrait

format is preferable to landscape presentation.