I am trying to create a different natural gas unit. Call it "mine"? I define the Btu/unit in the new fuel meter. I assign the new fuel meter to the Air-side and Water-Side equipment. Then I compare the number of fuel units (eQuest doesn't provide a way to change "Therms" in the ES-D report - that I could find - I didn't review the DOE2 manual to see if it is possible). I calculate the ratio of Btu/unit between "Therm" and "mine". I would expect that ratio to be the same as the ratio of units consumed between the two simulation runs. But this, somewhat poorly organized, table demonstrates my confusion:

ES-D "Therms"

Meter Btu/unit

ES-D Cost

mine

37948

35,724

$26,230

therm

15360

100,000

$10,617

ratio

2.47

2.80

2.47

Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy

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