Talk:Therm: Difference between revisions

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Isn't the word "burning" in the second sentence misleading, since burning is always a process with an efficiency less than 100%, while the Therm's 100,000 Btu value is theoretical, i.e., it assumes 100% efficiency?

"The therm (EC) is often used by engineers within the US." - Not sure if this the exact value used in the gas industry - the NYMEX conversion calculator (www.nymex.com) uses 1 therm = 105,505,600 J, which is one more d.p. than the EU definition.

212.21.109.30

Clearly the NYMEX value is the Therm (UK), rounded.

Urhixidur 17:01, 19 December 2005 (UTC)[reply]

IT or ISO

According to British thermal unit

1 Btu_IT	≡ 1055.05585262 J
	and
1 Btu_ISO	≡ 1055.056 J

This article says

1 thm (EC) = 100,000 Btu_IT = 105,505,600 J

Something's got muddled. Jimp 07:04, 5 December 2007 (UTC)[reply]

My calculations are as follows:

100,000 Btu_IT = 100000 * 1055.05585262 = 105,505,585.262 J

100,000 Btu_ISO = 100000 * 1055.056 = 105,505,600 J

Hmm, must be a "switcheroo".

@@ Line 25: / Line 25: @@
 Something's got muddled. [[User:Jimp|Jimp]] 07:04, 5 December 2007 (UTC)
+My calculations are as follows:
+:100,000 Btu<sub>IT</sub> = 100000 * 1055.05585262 = 105,505,585.262 J
+:100,000 Btu<sub>ISO</sub> = 100000 * 1055.056 = 105,505,600 J
+Hmm, must be a "switcheroo".