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Author Topic: Nat gas formula Back to Topics
artsbest

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Illinois

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Message Posted: Feb 21, 2013 2:48:03 PM

Does anyone have a convenient formula for converting current natural gas (therm) prices into an equivalent gallon gasoline price? In other words what would a comparable gallon of natural gas cost. I know it's apple and oranges subject but I've read when gasoline is about $3.50 natural gas (at current therm prices) would equate to about $1.20 per gallon comparison.
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darwinfinch
Veteran Author Gasbuddy

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Message Posted: Jan 21, 2014 11:39:52 AM

If you don't want people posting in old topics, couldn't you code your website to prevent that? Also, I suggest closing the thread about "ethanol, yes or no?" for the same reasons as you've asked the moderators to close this one: it is ancient and unhelpful.
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Gas_Buddy
Champion Author Maryland

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Message Posted: Jan 20, 2014 7:27:33 PM



The member asking this question started this topic 11 months ago, and has 140 points during that time, 100 for joining and 40 for two message posts. That means that the member starting this topic hasn't returned in a year, nor has (for that matter) anyone else responded.

Topics should not be posted in if the topic has been inactive for two or more months. In this case, it's not as if the information provided in the re-activating post will help the member starting the topic.

Moderators have been asked to close this topic.
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borsht
Champion Author Oakland

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Message Posted: Jan 20, 2014 5:53:29 PM

There are a lot sites that provide a lot of information on the internet.
But my decision on what fuel to use starts with the basics. The energy density.

If you want to compare energy density of fuel you should compute it in pounds.
Energy density of various fuels: BTU/pound.
Gasoline 19100
Ethanol 11500
Methanol 8600
Propane 21500
Compressed NG 21300
Coal(Anthracite) 14000 carbon

As one can see from energy data, ethanol is not a very smart fuel. It has have a lot of political correctness cranked into the formula.
Thus propane comes out higher than gasoline.
Once the hydro carbons get pretty long the ration of hydrogen to carbon approaches 2 to 1. In natural gas it is 4 hydrogen/carbon thus a higher density.

Gasoline has 66% more energy per pound than does ethanol. That is because it is loaded with oxygen already.
hydrogen has a lot more energy per pound than does carbon, thus the higher percentage of hydrogen in a molecule the higher the energy content.

I've made my own spread sheets to compare the purchase price of various fuels. But I don't know how to put one on gas buddy.

It gets complicated, because the purchase of natural gas thru the local utility is tiered. and the price is based on a lot of factors based on the state tariff regs.

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