Graphs are an effective way of displaying quantitative and statistical information. Unfortunately, only a few studies have systematically looked at presenting building energy data in forms which are both informative, visually efficient, and easy to comprehend. Recent advancements in computing, including the development of sophisticated graphing packages and powerful desktop computers have made the concept of graphical displays or graphical indices more timely than ever before. In this two part paper, graphical displays or indices are reviewed and discussed that can be used to analyze several years of hourly data (20,000 to 30,000 data points). The purpose of these papers is to show how graphical indices can be used to help a building energy analyst view large amounts of hourly building energy consumption data in order to quickly and efficiently analyze the data, check for errors, or establish time and temperature related trends over a large period of time. Data from case study buildings in Texas’ are used to demonstrate the indices. Part I reviews the literature on graphical presentations of building energy use data and graphical perception and presents two graphical indices. Part II provides four additional graphical indices in use in the data review process for the Texas LoanSTAR program2.

1.
Abbas, M., 1993, “Development of Graphical Indices for Building Energy Data,” Masters thesis. Mechanical Engineering Department Texas A&M University.
2.
Bronson
D. J.
,
Hinchey
S. B.
,
Haberl
J. S.
, and
O’Neal
D. L.
,
1992
, “
A Procedure for Calibrating the DOE-2 Simulation Program to Non-Weather-Dependent Measured Loads
,”
ASHRAE Transactions
, Vol.
98
, No.
1
, pp.
645
645
.
3.
Chambers, J., Cleveland, W., Kleiner, B., Tukey, P., 1983, “Graphical Methods for Data Analysis,” Wadsworth & Brooks/Cole Statistics/Probability Series, Pacific Grove, CA.
4.
Christensen, C, 1984, “Digital and Color Energy Maps for Graphic Display of Hourly Data,” Proceedings of the 9th Annual Passive Solar Conference, Columbus, Ohio, Sept.
5.
Christensen, C., and Ketner, K., 1986, “Computer Graphics Analysis of Class B Hourly Data,” Proceedings of the 11th National Passive Solar Conference, Boulder, CO, June.
6.
Claridge, D. E., Haberl, J. S., Bryant, J., Poyner, B., and McBride, J., 1993, “Use of Energy Management & Control Systems for Performance Monitoring of Retrofit Projects; Final Summary Report,” Energy Systems Laboratory Report No. ESL-TR-91/09-02, Texas A&M University, Mar.
7.
Claridge, D., Haberl, J., Liu, M., Houcek, J., Aather, A., 1994, “Can You Achieve 150% of Predicted Retrofit Savings? Is it Time for Recommissioning?,” Proceedings of the 1994 ACEEE Summer Study, pp. 5.73–5.88, Aug.
8.
Cleveland, W. S., 1985, The Elements of Graphing Data, Wadsworth and Brooks/Cole Advanced Books and Software, Pacific Grove, CA.
9.
Golden, 1989, Grapher Software, Golden Software Inc., 809 14th Street, Golden, Colorado, 80402.
10.
Haberl, J. S., Belur, R., and Kissock, K., 1993b, “Improving the Paradigm for Displaying Complex Building Energy Consumption Data,” Proceedings of the ASME-ACES International Solar Energy Conference, Washington, D.C., Apr.
11.
Haberl, J. S., Bronson, D., and O’Neal, D., 1992, “An Evaluation of the Impact of Using Measured Weather Data Versus TMY Weather Data in a DOE-2 Simulation of an Existing Building in Central Texas,” ESL Report, Texas A&m University.
12.
Haberl, J. S., Bronson, D., Hinchey, S., and O’Neal, D., 1993a, “Graphical Tools to Help Calibrate the DOE-2 Simulation Program,” ASHRAE Journal, Jan.
13.
Haberl, J. S., and Komor, P. S., 1989b, “Investigating an Analytical Basis for Improving Commercial Building Energy Audits: Results from a New Jersey Mall,” Center for Energy and Environmental Studies, Princeton University, NJ.
14.
Haberl, J. S., Mac Donald, M., and Eden, A., 1988a, “An Overview of 3-D Graphical Analysis Using DOE-2 Hourly Simulation Data,” ASHRAE Transactions, Vol. 94, No. 1.
15.
Haberl, J. S., Norford, L. K., and Spadaro, J. V., 1989a, “Diagnosing Building Operational Problems: Intelligent Systems for Diagnosing Operational Problems in HVAC Systems,” ASHRAE Journal, Jun.
16.
Haberl, J., Sparks, R., and Culp, C., 1996, “Exploring New Techniques for Displaying Complex Building Energy Consumption Data,” Energy and Buildings, Aug.
17.
Haberl, J. S., and Vajda, E. J., 1988b, “Use of Metered Data Analysis to Improve Building Operation and Maintenance: Early Results From Two Federal Complexes,” Proceedings of the ACEEE Summer Study on Energy Efficiency in Buildings, Asilomar, CA, Aug.–Sept.
18.
IDL. Interactive Data Analysis Language, 1993, Research Systems Inc. Boulder, CO 80303.
19.
Kissock, K., Wu, E., Sparks, R., Claridge, D., Mahoney, J., Haberl, J., 1994, “Emodel Software, Version 1.4d,” Energy Systems Laboratory, Report No. ESLSW-94/12-01, Texas A&M University, Dec.
20.
Milne, M., and Yoshikawa, S., 1978, “Solar-5, an Interactive Computer-Aided Passive Solar Building Design System,” Proceedings of the 3rd National Passive Solar Conference, Vol. 3, Newark, Delaware.
21.
Olgyay, V., 1963, Design with Climate: Bioclimatic Approach to Architectural Regionalism, Princeton University Press, Princeton, NJ.
22.
PVWAVE, 1993, Visual Numerics, Boulder, CO.
23.
SAS, 1989, Statistical Analysis System, SAS Institute, Cary, NC.
24.
Supersymmetry, 1992, Electric Eye, Supersymmetry, U.S.A., Inc. Plantersville, Texas.
25.
Sparks, R., Mahoney, J., Haberl, J., 1995a, “Look3D Version 1.4,” Energy Systems Laboratory, Report No. ESL-SW-95/01-01, Texas A&M University, Jan.
26.
Sparks, R., Ratterree, G., Mahoney, J., Haberl, J., 1995b, “Animate for Windows Version 2.0,” Energy Systems Laboratory, Report No. ESL-SW-95/04-01, Texas A&M University, Apr.
27.
Tufte, E. R., 1983, The Visual Display of Quantitative Information, GraphicPress, Cheshire, Connecticut. Tufte, E. R., 1990, Envisioning Information, Graphic Press, Cheshire, Connecticut.
28.
Tukey, J. W., 1977, Exploratory Data Analysis. Addison-Wesley Publishing Co., Reading, MA.
29.
Tukey, J. W., 1988, The Collected Work of J. W. Tukey, Vol. 5, graphics; 1965–1985, Wadsworth Publishing. Monterey, CA.
30.
Voyager, Voyager Users manual, 1990, Lantern Corporation. Clayton, MO 63105.
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