1 unit conversions angelique luedeker, itep. 2 unit conversions and teiss teiss does some of the...

1

Unit Conversions

Angelique Luedeker, ITEP

2

Unit Conversions and TEISS

TEISS does some of the math for you

Emission Factor (EF) x Activity Data = Emissions

TEISS provides EFYou provide activity data

3

Emission Factors

EF is basically a conversion factor

ExamplesLbs of PM10 emitted/ton of wood burned

Lbs of PM2.5 emitted/vehicle mile traveled

Lbs of mercury emitted/ton of coal burnedExample0.5 lbs CO x 10,000 tons coal = 5,000 lbs CO

1 ton coal

4

Unit Converter in TEISSTEISS has unit conversion tool

5

TEISS Unit Conversion Tool

Area is selected, shows list of area units

6

TEISS Unit Conversion Tool

Mass is selected, shows list of mass units

7

TEISS Unit Conversion

See handout and practice using Unit Conversion Tool

8

Energy Unit Conversion

Converting energy units often requires knowing energy density of a given material

Energy density can vary within material

TEISS Unit Conversion Tool cannot convert energy to other unit categories, such as volume

9

Energy Density

ExamplesNatural gas from different sources provides differing amounts of energy

High-heating value gas has 1027 BTUs/ft3

Low-heating value gas has 930 BTUs/ft3

Most gas is somewhere in-betweenDifferent kinds of wood provide different amounts of heat when burned

10

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 1020 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

11

Energy Unit Exercise

• See handout and work through 2 questions related to energy density