1 Angelique Luedeker ITEP/TAMS CenterUnit Conversions Angelique Luedeker ITEP/TAMS Center

2 Homework Discussion Are there any questions on the Case Project exercise from the TEISS Training Course manual?

3 Unit Conversions and TEISSTEISS does some of the math for you Emission Factor (EF) x Activity Data = Emissions TEISS provides EF You provide activity data

4 Activity Data Example The Total Area Tilled value you enter needs to be in units of acres If you have collected data in other units, for example, square miles, you need to convert

5 Emission Factors EF is basically a conversion factor ExamplesLbs of PM10 emitted/acre of area tilled Lbs of PM2.5 emitted/vehicle mile traveled Lbs of mercury emitted/ton of coal burned

6 Unit Converter in TEISSTEISS has unit conversion tool

7 TEISS Unit Conversion ToolArea is selected, shows list of area units

8 TEISS Unit Conversion ToolMass is selected, shows list of mass units

9 Energy Unit ConversionConverting energy units often requires knowing energy density of a given material Energy density can vary within the same material TEISS Unit Converter tool cannot convert energy to other unit categories, such as volume

10 Energy Density ExamplesNatural gas from different sources provides differing amounts of energy High-heating value gas has BTUs/ft3 Low-heating value gas has 930 BTUs/ft3 Most gas is somewhere in-between Different kinds of wood provide different amounts of heat when burned

11 Energy Density DefaultsWhat if you don’t know energy density of your reservation’s natural gas or wood? Use defaults For natural gas, EPA’s AP-42 gives BTUs/ft3 For wood, TEISS provides a converter within the wood-burning calculators Allows you to enter volume of wood (cords) and specify wood type Then it calculates tons of wood per cord required to do calculation

12 Homework due in 5 days: Answer the questions in the UnitConversionExercise document There are two pages of questions in the document your answers to the instructors