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Literature Review of Uncertainty of Analysis Methods (F-Chart Program), Report to the Texas Commission on Environmental Quality
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This literature review covers the F-Chart program, which is one of the legacy programs in the ESL’s Emissions Calculator (eCALC), a web-based emissions reductions calculator. The eCALC program is a tool for those who want to see how their energy savings has reduced NOx emissions, a by-product made during the burning of fossil fuels. This report includes a brief history of the F-Chart method, its applications, accuracies, basic equations, and an example calculation.
DescriptionThis report reviews the reported uncertainty of F-Chart analysis method by reviewing the published related accuracy of TRNSYS simulations versus measured data, F-Chart predictions versus measured data, F-Chart predictions versus TRNSYS simulations and F-Chart predictions versus other methods. This report begins with a review of the history of the F-Chart method, and includes an example F-Chart calculation. In summary, from the literature it was found that hourly TRNSYS simulations versus measured data were shown to be within 5 to 6%, F-Chart predictions versus measured data showed agreement in the 2 to 15% range, and F-Chart predictions versus TRNSYS simulations were shown to vary from 1.1% to 4.7%. A significant number of studies used F-Chart to assess the accuracy of newly developed methods. In these studies agreement varied from 2.5% to 9%.
SubjectF-Chart analysis method
emissions reductions calculator
reduced NOx emissions
- Technical Reports 
Haberl, J. S.; Cho, S. (2004). Literature Review of Uncertainty of Analysis Methods (F-Chart Program), Report to the Texas Commission on Environmental Quality. Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University. Available electronically from