1. Angelique Luedeker ITEP/TAMS Center
Unit 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 TEISS
TEISS 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 Examples
Lbs 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 TEISS
TEISS has unit conversion tool

7. TEISS Unit Conversion Tool
Area is selected, shows list of area units

8. TEISS Unit Conversion Tool
Mass is selected, shows list of mass units

9. Energy Unit Conversion
Converting 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 Examples
Natural 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 Defaults
What 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