It is taken for granted that participants in this forum can find innumerous
sources of "equalities" at a click on their computers, and in the printed
material published for generations. I had posted some uncommon conversion
factors such as 1 c/kWh = 2.8 $/GJ or 1 billion kWh/y = 0.114 GW with the
minimum of significant digits. And although most participants can derived such
equalities themselves, my listing them was intended to save time and
standardize the prefix in each parameter and circumstance.
I hope I will receive interesting and practical numbers for the table soon.
Comments that are off that topic, erroneous, oddly puzzling, or merely arcane
academic wanderings will of course be ignored.
Stan J.
PS: I agree that such criteria as $/GJ in fossil fuels change. Nevertheless, so
does life. The table has its value for comparison purposes and needs updates as
the EIA and all such tables do. The units and prefixes stay.
----- Original Message -----
From: Ambler Thompson
To: [EMAIL PROTECTED] ; jU.S. Metric Association
Cc: SCC14 IEEE
Sent: 08 Mar 27, Thursday 17:43
Subject: Re: [USMA:40689] Electricity and Heat in SI
Actually the tables are in SP811.
At 11:26 AM 3/27/2008 -0500, [EMAIL PROTECTED] wrote:
Stan,
You can find the "equalities" and more (from non-SI to SI) in NIST SP 330.
That is the direction of global movement. Ignore the reverse equalities from
SI to non-SI.
Gene.
---- Original message ----
>Date: Thu, 27 Mar 2008 11:53:29 -0400
>From: "Stan Jakuba" <[EMAIL PROTECTED]>
>Subject: [USMA:40689] Electricity and Heat in SI
>To: "U.S. Metric Association" <[email protected]>
>Cc: "SCC14 IEEE" <[EMAIL PROTECTED]>
>
> There are several people in this group knowledgeable
> about energy and power in electricity generation and
> consumption. I am attempting to fill the spaces in
> the attached table and need help. There are wide
> ranging numbers in the literature and on the
> Internet. I am looking for "ball park" figures that
> are in the middle of those ranges. The
> numbers should reflect commercial plants. With the
> solar ones, the plants should be in operation for
> several seasons to yield the year-averaged,
> net output (not name-plate numbers and not
> projections no matter how solidly based).
>
> The performance and cost numbers are commonly shown
> in a plethora of units (e.g., in EIA as kWh and Btu,
> and worse). The attached table unifies the units on
> SI. To help you get the SI values, here are several
> conversion factors:
> 1 kWh = 3.6 MJ = 3500 Btu
> 1 c/kWh = 2.8 $/GJ
> 1 billion kWh/y = 1 million MWh/y = 0.0036 EJ/y
> = 0.114 GW
> 1 quad = 1 EJ
> 1 therm = 0.1 GJ
> 1 Btu = 1 kJ
> 1 acre = 4000 m²
> 1 mi² = 2.6 km²
> 1 gallon (US, liquid) = 3.8 dm³
> 1 gallon (Imperial) = 4.6 dm³
> 1 barrel (oil only) = 0.159 m³
> 1 ft³ = 0.028 m³
> A small household's el. consumption: 20 GJ/y = 0.6
> kW = 5000 kWh/y
> A small house total consumption, moderate climate:
> 150 GJ/y = 4.6 kW = 4000 kWh/y = 140 MBtu/y.
> For reference, the US total energy consumption is
> just over 100 EJ per year and this represents
> continuous average power of 3200 GW. Of that,
> electricity amounts to 15 EJ, equiv. of 480 GW.
> Solar insolation at the surface in the US is 200
> W/m².
>
> This mailing is not intended to start a discussion
> about the pros and cons of energy sources. It is
> strictly about unified units and reference numerical
> values in them.
> Stan J.
>
>
>________________
>Electricity in SI.doc (61k bytes)
>________________
>Electricity in SI.pdf (39k bytes)
Dr. Ambler Thompson
NIST
International Legal Metrology
100 Bureau Drive, Stop 260
Building 222/A152
Gaithersburg, MD 20899
Tel: 301-975-2333
Fax:301-975-8091
[EMAIL PROTECTED]
