The Climate Registry Reporting

Need to report your facility's carbon?

All facilities in Washington State that emit more than 10,000 tonnes of CO2e annually have to report their carbon emissions to the Department of Ecology. Some property owners are already voluntarily reporting to The Climate Registry, the nation's standard carbon reporting entity. The Climate Registry has standards of reporting for all types of carbon emissions.

The Climate Registry provides the current methodology for reporting carbon from steam users. Click here to view Section 15.2 of the Climate Registry's reporting manual.

Seattle Steam

Here is an example of a typical calculation for a building:

 

Step 1a – Low Pressure Steam

Mlbs of steam used = 2908 Mlbs (as an example)

Heating Value of low pressure delivered Steam = 1156.3 Btu/lb.

Reference Point = 180 Btu/lb.

LP Steam Energy Consumption (MMBtu) = [Enthalpy of Delivered Steam (Btu/lb.) - 180 (Btu/lb.)] • Steam Consumed (lbs.) + 1,000,000 (Btu/MMBtu) Building Energy Consumption (MMBtu) = [1156.3 - 180] x 2.908 = 2839 MMBtu

Step 1a – High Pressure Steam

Mlbs of steam used = 2500 Mlbs (as an example)

Heating Value of high pressure delivered Steam = 1194 Btu/lb.

Reference Point = 180 Btu/lb.

HP Steam Energy Consumption (MMBtu) = [Enthalpy of Delivered Steam (Btu/lb.) - 180 (Btu/lb.)] • Steam Consumed (lbs.) + 1,000,000 (Btu/MMBtu) Building Energy Consumption (MMBtu) = [1194 - 180] x 2.5 = 2535 MMBtu

Step 2

2014 SSC Emission Factor = 156 lbs. CO2e per MMBtu (Contact Seattle Steam to get most current data).

To get building carbon emissions in lbs. multiply the MMBtu in Step 1by the Emissions Factor. To convert to metric tons, divide emissions (lbs.) by 2204.6.