What is APA? APA stands for American Psychological Association and is a common formatting style for essays and papers in the social sciences. APA style has unique formats for in-text citations and reference pages. Its style and guidelines increase the ease of reading comprehension for viewers as well as ensure consistent presentation of content and written material.
In this calculation weâll use an ethane heat content of 66,500 BTU per gallon. The top boxes in Figure #1 show the conversion of the ethane price per gallon to dollars per MMbtu. So if the price of ethane is 22 cents, divide by 66,500 and multiply by 1,000,000 to yield an equivalent gas price of $3.31/MMbtu.
The BTU multiplier in the formula is 500. Because BTUs are measured per hour, the 500 comes from one gallon of water that weighs 8.33 gallons, times 60 minutes in one hour. The second piece of the formula and sometimes the hardest to identify is flow rate in GPM, or the system gallons per minute.