Fuel consumption formula. A quick estimating formula to calculate gas flows is as follows-, CFH =< (GPM WATER)  X  (°F OUT - °F IN)  X  1.1 > ÷ 2, Heat 10 GPM (gallons per minute) of water from 60° F to 180° F. Heating calculations are based on the rate of temperature rise. Not required if you are taking a reading from a gas bill. Keep an eye on your inbox for more information. Finding Fuel Consumption Know that the equation for fuel consumption is "Miles Driven divided by … Cost to operate = usage (hours or load) x (BTUs/100,000) x price per therm OR The average carbon dioxide coefficient of distillate fuel oil is 429.61 kg CO 2 per 42-gallon barrel (EPA 2018). A typical range for natural gas is 38-39 MJ/m³, and 1 MMBTU = 1.055 GJ, so about 27.4 m³ = 1 MMBTU. Please wait while we see what is available at your zip code. Your gas company likely uses one of the following: If you’re not sure which unit your gas company uses, just check your latest bill. For process air applications the range can be from 500 to as much as 1200 feet per minute so measuring air velocities would be a wise choice. If the measured gas flowrate is not converted to standard conditions, then the density of every single component should be used on the pressure and temperature that … If you know the burner efficiency, you can calculate the exact fuel consumption per the output of the burner. The Multiplier factor converts imperial to metric. Calculations Explained Below is an explanation of the terms used in the calculator. b. If one MCF costs $9.00: Using this method, figuring out the cost per hour of using your gas appliances is fairly simple. If you do not, you will have to use an approximation. When that time comes, shop around for gas-efficient replacements, and don’t forget to check the BTU ratings. The current charge for natural gas from Peoples Gas is $0.2691 per therm. Many applications for natural gas involve the heating of air or water. The capacity of a 100 ft natural gas pipe with a nominal diameter 0.5 inches (actual ID 0.622 in) and 0.5 inches WC pressure drop can be calculated as k = [ ((0.622 in))5/ (1 + 3.6 / (0.622 in) + 0.03 (0.622 in))]1/2 = 0.117 q = 3550 0.117 ((0.5 in) / (100 ft) 0.60)1/2 ft. of natural gas is burned per hour and each contains 1100 Btu, what is the rate of combustion? However, gas burners are not 100-percent efficient. Log in to renew or transfer your service, Supply Chain Responsibilities & Disclosure. If the price per unit of gas on your bill is already measured in BTUs, you can skip this step. Natural and propane gas have specific levels of energy contained within them. MCFs: One cubic foot of natural gas is equal to 1,028 BTUs. You need to know the fuel flow the engine consumes to calculate the thermal efficiency. If you have the original documentation for a gas appliance, you’ll find the BTU rating in there. Heating 100 gallons of water in 10 minutes is the same rate as 10 GPM (100 Gallons ÷10 minutes). As an example, let’s assume you are planning to replace a steam unit heater with a new gas fired unit rated at 100,000 BTU/HR. Instead of a universal unit like kWh, different gas utilities use different units to measure gas use. Disclaimer: The MOE Conversion tool should be used as a guide only as it has been configured to provide approximate conversions. Gas meter reading: January 2017: 27 000 m³ January 2018: 29 100 m³ Annual consumption: 29 100 m³ - 27 032 m³ = 2100 m³ Equivalent in kWh: 2100 m³ x 9.9 kWh/m³ = 20 790 kWh. * Enter the price of natural gas as the price per therm. The detail of how the gas calculations need to be done are detailed in a piece of legislation called the The Gas (Calculation of Thermal Energy) Regulations 1996. 24/7 Customer Service:1-800-752-0556Int'l:+1-770-532-7736Text Us: 470-577-0865info@control-specialties.com, HOW TO CALCULATE NATURAL GAS CONSUMPTION FLOWS. If that is not possible air velocity in most HVAC heating applications is typically 500 to 700 feet per minute. Your gas bill might be so low every month that you don’t think twice about your energy use, but if you break down your bill by appliance, you could find opportunities to save even more. The formula: (3600 x 1000)/seconds = BTUH. Revised electric power data for 2017 will not be adjusted in the Natural Gas Monthly until the 2018 Natural Gas Annual is published. The number you compute for BTU capacity for an appliance should approximately equal the appliance's nameplate "input" BTUH on the appliance. From . The ∆H comb of one mole of methane (CH 4) at 298.15 K is the heat of reaction between CH 4 and O 2 to form CO 2 (g) and H 2 O(g), according to Equation 1. A great website for engineering information is www.engineeringtoolbox.com. The result depends on the metrics used as input: miles per gallon if the input was in miles and gallons, and km per liter if the input was in kilometers and liters. ; Name * The formula for calculating fuel consumption used in this online fuel consumption calculator is: Fuel consumption = Fuel used / Distance travelled. This chart approximates the fuel consumption* of a natural gas generator based on the size of the generator and the load at which the generator is operating at. How to Reduce Generator Fuel Consumption An example is the 8000-watt Generic XC8000E generator with an 8.5-gallon tank rated at 50% for 11 hours and burns a little over ¾ of a gallon per hour. CFH =< (CFM AIR) X (°F OUT - °F IN) > ÷ 800, Heat 1600 CFM (cubic per minute) of air from 50 F to 150 F. If you are doing a retrofit to an old system finding data on air flows can become a real challenge. Access these free and easy-to-use calculators below to convert one unit of measure to another, compare boiler fuel costs, calculate air emissions from natural gas combustion, analyze energy losses associated with boiler operations and more. Most gas companies offer a glossary of terms or a guide to understanding your bill. Sorry, this plan is not available for your location. CCFs: (one hundred cubic feet) is equal to 102,800 BTUs. Click your state below to view offers in your area. But that will vary a few percent with local gas supply. Divide the price per MCF by 1,028,000 to get the price per BTU: $0.00000875486. 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