[Bldg-sim] gas: Btus to cost via pricing scheme

[Zeng, Ming]

In CO, the customer charge is per day per meter station at $6.136, not related to Therm or CCF.  Distribution charge is per MCF per day, GCA is determined by a complicated equation of projected cost over projected sales plus something minus something. This is not helping you, but the point is that different utility company has different rate structure.

This is part of reason I want to use EIA data to avoid these confusing terms.

________________________________
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Andrew McNamara
Sent: Tuesday, January 08, 2008 9:05 AM
To: Cramer Silkworth
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] gas: Btus to cost via pricing scheme

Hello Cramer,

An colleage of mine and I did some recently did some research on Natural Gas prices for New York State, and we banged our heads against the wall for a fair bit before figuring out how these rate structures fit together.  The two of us just took a look at what you listed below and here's our best guess.

Customer charge is the monthly base
Distribution charge is likely the "delivery" component charged on a "per therm" or "per ccf" basis
Cost of Gas Adjustment is likely the "supply" component charged on a "per therm" or "mdcq" basis (not sure what mdcq is, but it seems to me that only one of these two lines applies to the actual bill, depending which unit you are billed in (therms vs. mdcq)
Local Distribution Adjustment Charge is likely another fee they tack on per therm, ccf, or mdcq.

So.... if you were billed in therms, I believe your total bill would be 550.41+(1.0322+0.8651+0.0491) * Therms usage.

Hope that helps!

Best,
Andy
--
Andrew McNamara, LEED AP
Bright Power, Inc.

tel: 212.803.5868
fax: 866.379.8026
cell: 917.974.4499

On 1/7/08, Cramer Silkworth <silkworth at transsolar.com<mailto:silkworth at transsolar.com>> wrote:
Hello everyone,

I'm trying to take my gas use output numbers (Btus) and calculate the cost of the gas using the pricing scheme from the local utility (Keyspan in Boston) for a LEED certification. However, I can't figure out what the scheme means. Can someone tell me what these numbers mean, in terms of how to write an equation to take my hourly outputs of gas use (from Trnsys, but I'm doing this in Excel) and calculate final (monthly) cost?

"Customer Charge (fixed): $550.41": I'm assuming this is the monthly base fee.
"Distribution Charge: $1.0322": Dollars per ...?
"Cost of Gas Adjustment CGA (mdcq): $0.8432": Again, no idea
"Cost of Gas Adjustment CGA (Therm): 0.8651": ...
"Local Distrib. Adjustment Charge LDAC: $0.0491": ...

(These numbers are under the heading "High Load Factor General Service Rate - Extra Large," this is for a rather large commercial building complex.

I've gone to the utility's website and found this data, but nothing to explain it, nor anywhere else on the web. I called them, and just get passed around their service department because no one seems to be able to understand how I can have gas numbers without having a building!

Any help would be greatly appreciated. Thanks,
Cramer


J. Cramer Silkworth
silkworth at transsolar.com<mailto:silkworth at transsolar.com>
+49 0711-67976-182
Transsolar Energietechnik GmbH
http://www.transsolar.com<http://www.transsolar.com/>
Stuttgart - Munich - New York

Climate Engineering: Technologies for energy-efficiency and user comfort in buildings.
Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart, Germany

Amtsgericht Stuttgart -  HRB 23347 / USt-IdNr.: 99073/00911

Partners: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst



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