";s:4:"text";s:30162:"If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. For example, lets say we want to calculate both net and gross BTUs for propane gas (#2 on this table). @7HyJ=E"a;C,5zJb]TkGE}t7~woo~sn|o~}yw>{{?|/_?}!as/7_}rUw_n|5M?K[;~C=~'qn!nz_{}{?zqv6QquqCs{o_yqU?Ly~/iQ/vo{}r^'7ooiO0x?z}?_o^%?~&/d:}AHirZ?lgg;SJIzhm~hvAh p[?cw8uS>eDcao FgJ
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/2GAga For most fuels, NHV will be about 2-5% lower than GHV. :M]on7qE While there may be alternative definitions of, or formulas for calculating, LHV, EPA maintains Manage Settings ``l The Btu content of each fuel provided below (except for crude oil) is the average heat content for fuels consumed in the United States. Barrels or gallons for liquid petroleum fuels (such as gasoline, diesel fuel, and jet fuel) and biofuels (ethanol and biodiesel), 1 barrel (b) of crude oil or petroleum products = 42 U.S. gallons, 1 barrel of (U.S.) dry measure = 3.29122 bushels or 4.2104 cubic feet, 1 barrel (42 gallons) of crude oil produced in the United States =, 1 gallon of finished motor gasoline (containing about 10% fuel ethanol by volume) =, 1 gallon of diesel fuel or heating oil (with sulfur content less than 15 parts per million) =, 1 gallon of heating oil (with sulfur content at 15 to 500 parts per million) =, 1 short ton (2,000 pounds) of coal (consumed by the electric power sector) =, 1.039 million Btu per thousand cubic feet. B\gG?x|/JG;sGXTwH P@\f%>1f}dT*!BlzF}A^(H?c|~O{=Ysl`t, .^/owLG_5;VxE:)|V(
yD>OS0x/I2'YTr(/ hncPUFUe1 The most common fuels are fossil fuels, such as coal, oil and natural gas. All Rights Reserved. One way to do this is by using renewable energy sources such as solar power, wind power or hydroelectricity. We can plug those numbers into this formula to calculate the LHV: Ash also reduces the heating value because it does not contribute to combustion and actually absorbs some heat during combustion. The heating value of a sample of natural gas is very easy to determine if you have the right equipment and standards in place. Carbon = 50% Btu = British thermal units; scf = standard cubic feet. J1J!cs(}K51pJ4+FAb@y(LkPo)Yl CZ"*`,. This means that each fuel will have a different calorific value. Reserves, production, prices, employment and productivity, distribution, stocks, imports and exports. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. How Do You Calculate the Heat Value of Natural Gas? For most practical purposes, however, either value can be used to compare different fuels. Copyright 2022MET.com - All rights reserved. AddThis use cookies for handling links to social media. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. As time goes on, people will start to recognize that the heating value of natural gas is decreasing. The formula is simple: Price of 1 m3 natural gas = volume (m3) x heat value (MJ/m3) x price (Currency/MJ) x VAT. 1 short ton (2,000 pounds) of coal (consumed by the electric power sector) = 18,934,000 Btu. The heat value of natural gas is the amount of heat released when the gas is burned. If there's a transition from ice to water, we're considering the latent heat of fusion, whereas for the phase change from a liquid into steam, it's the latent heat of vaporization. Design, CMS, Hosting & Web Development :: ePublishing. To calculate the HHV or LHV of a fuel, we need to know its chemical composition. uf+}sBC]:QxwErX=Mh?5Gw>Vp+`}y}@i&-m7wvltY`Wol#5{{,eFWX.+8t2VpP/}ap^O^xW,X1;`8Emau`Hk6@6Q%-9tz! The contents of this course are as follows: . 1 watt is approximately 3.412 BTU per hour. The heating value of natural gas is the amount of heat released when the gas is burned. Not just the maintenance of heating systems, but thermal insulation is also an important factor to have a better heating efficiency. The higher the calorific value, the more heat that is released. To calculate gross BTUs, simply multiply together the specific gravity and energy value figures without performing any further calculations.. help you have the best experience while on the site. These values can be found in tables provided by most manufacturers. The British Thermal Unit, or BTU, is an energy unit. fuels for heating your homes on an equal basis. Because energy used in different countries comes from different places, Btu content of fuels varies slightly from country to country. The Tool calculates the adjusted flow rate and corresponding heat content (Btu) value of landfill gas (LFG) after adjusting a wellfield to meet the inlet specifications for RNG treatment/processing technology. In order to calculate the heating value of fuel, you need to know the percentage of each element in the fuel by mass. The calorific value of a fuel is the amount of heat that is released when the fuel is burned. hk7J~,{wak3HjV. 1218 0 obj
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What is the heat value of natural gas? Maps, tools, and resources related to energy disruptions and infrastructure. It is the quantity of heat required to raise the temperature of one pound of liquid water by 1 degree Fahrenheit at the temperature that water has its greatest density (approximately 39 degrees Fahrenheit). there can be significant differences in heating value of natural gas based on geography, pipeline characteristics, time of year vitually all sales of natural gas both wholesale and . There are two types of heating values: the higher heating value (HHV) and the lower heating value (LHV). The average gross heating value of natural gas is approximately 1,020 British thermal units per standard cubic foot (Btu/scf), usually varying from 950 to 1,050 Btu/scf. The Heating Value of Natural Gas varies depending on the composition of the gas, but it is typically between 35 and 55 MJ/kg. 1.1 This practice covers procedures for calculating heating value, relative density, and compressibility factor at base conditions (14.696 psia and 60F (15.6C)) for natural gas mixtures from compositional analysis. This calculator is designed to calculate the following for natural gas and other combustible gases : The Gross Calorific Value is called also: Higher Calorific Value HCV, Gross Calorific Value GCV, Higher Heating Value HHV. This value is the higher heating value (HHV). The heat value of natural gas varies depending on the source, but is typically between 35 and 50 MJ/m. The heating value can be calculated using the following equation: 1 gallon of heating oil (with sulfur content at 15 to 500 parts per million) = 138,500 Btu. For electric water heaters, including heat pump units. Sponsored Links Fuel gases gross and net heating values: 1 Btu/ft3= 8.9 kcal/m3= 3.73x104J/m3 all the combustion products remain in gaseous state but the water vapor produced during the combustion is condensed. Btu content of common energy units (preliminary estimates for 20211). CO2 + 2H2 O LHV = H reax at 298.15 K 1) Hcomb = Hrx = Hf of CO2 + 2Hf of H2O Hf . . We would find that its specific gravity is 0.504 and its energy value per gallon is 91,000BTUs/gal . Heating value is one of the key calculations in energy industry. Then enter the value you want to convert and its units, and clickConvertto initiate the conversion. Natural gas has a high heating value, which makes it an efficient fuel for heating homes and businesses. Doing the math give us these results: When applied to fuel, it measures the amount of heat that is released when the fuel is burned. KUZ TS Financial market analysis and financial data for major energy companies. and cookie policy to learn more about the cookies we use and how we use your Uranium fuel, nuclear reactors, generation, spent fuel. 1 BTU = 1,055 joules, 252 calories, 0.293 watt-hours, or the energy released by burning one match. We'll assume you're ok with this, but you can opt-out if you wish. State energy information, including overviews, rankings, data, and analyses. [5] For solid fuels, the heating values in units of Btu/lb are converted from the heating values in units of Btu/ton. Includes hydropower, solar, wind, geothermal, biomass and ethanol. You can convert the natural gas and heating oil consumption data into Btu to determine which home used more energy for heating. This means that a given quantity of methane will release about 50 MJ of heat when burned. The higher the heating value, the more energy the gas contains. hv = Heating value (kJ/kg) The lower heating value (LHV) or higher heating value (HHV) of a gas is an important consideration when selecting a gas engine or CHP plant. What is the Heating Value of Natural Gas? Net BTU = (0.504 x 0.000125) x 91000 = 4530BTU/gal. Heating values vary depending upon the source of the gas. By visiting this website, certain cookies have already been set, which you may delete and block. We don't save this data. The heating value of a gas can be estimated from the composition of the gas and heating values associated with each component of the gas. Read More. ISO 6976 (1995) Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition The variation in quality may give heating values within a range 5 -10% higher and lower than the given value. To calculate HHV, start with the LHV and add on the latent heat of vaporization for any water vapor produced during combustion: endstream
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this website. How to Calculate Heating Value of Natural Gas | Openlab Chemstation Intelligent Reporting, Find the composition of the natural gas by percentage, The typical composition of natural gas is approximately 85% methane, 10% ethane, 3% propane and 2% butane, Look up the heating value for each component in British Thermal Units per standard cubic foot (Btu/scf), The heating values for methane, ethane, propane and butane are respectively 1,031 Btu/scf, 1,075 Btu/scf, 1,265 Btu/sf and 2,488 Btu/sf, Multiply each components percentage by its heating value to find the total heating value of the natural gas sample, For example: 85% x 1,031 = 876 + 10% x 1,075 = 108 + 3% x 1 ,265 = 38 + 2% x 2 , 488 = 100 The heating value of natural gas is the amount of heat released when the gas is burned. For example, in Hungary, the heat value of natural gas has an average of 34.12 MJ/M3. This video provides a guideline on How To Calculate Heating Value of Natural Gas with some commonly found compounds. Use our online Natural Gas Calorific Value Calculator for SI unit or field unit. We need to find ways to generate energy without releasing these harmful gases into the atmosphere. PEC8J366 NBS Referencebooknottobe 1 library, TECHNICALNOTE 299 CalculationoftheHeatingValue ofaSampleofHighPurityMethane forUseasaReferenceMaterial GeorgeT.Armstrong 4 Q Z /***"'. Most people are familiar with the term BTU, but fewer know how to calculate the heating value of fuel. The lower heating value (also known as net calorific value) of a fuel is defined as the amount of heat released by combusting a specified quantity (initially at 25C) and returning the temperature of the combustion products to 150C, which assumes the latent heat of vaporization of water in the reaction products is not recovered. We and our partners use cookies to Store and/or access information on a device. calculate and use these natural gas properties is crucial to reservoir, production, and natural gas process engineering. These gases contribute to climate change and air pollution. hv = qp + qs qw We don't save this data. to calculate the btu at one of the base conditions below, multiply by factor desired base factor 14.735-60-dry 1.o177 14.73-60-saturated 0.9996 Our Heating Cost Calculator uses THERMS to estimate the cost of heating with natural gas. As explained by FERC The net or lower heating value is obtained by. Volumetric Heating Values are based on standard temperatures and pressure of dry gas - 60. Each week, the actual heating value of gas in each BTU area is measured by sampling the gas and analyzing it with a gas chromatograph (except in collection areas, as explained below). How to Calculate Heating Value of Natural Gas, Infrared heaters energy use (costs, efficiency, W/sq. Heating value is the number of British Thermal Units (BTUs) in one cubic foot of natural gas. Greenhouse gas data, voluntary reporting, electric power plant emissions. How to Make the Perfect Clove of Garlic:, This website uses cookies to improve your experience. Heres a quick guide on how to calculate heating value of natural gas so that you can be more informed about your own energy use. To calculate the heat value of natural gas, you need to know the composition of the gas. If you want read more standardized definition of the two above terminology Net calorific Value and Gross Calorific Value you can check the iso standards 6976. Copyright 2023. Moisture reduces the heating value because it takes up space in the molecule that could otherwise be used for combustible material. Once you have done this for all of the elements, you can add up all of the results to get the total heating value for the fuel. 365 X .4105/.58 X $1.09 (the cost of natural gas on the Energy Label) = $282. Example: A natural gas water heater with an EF of .58 and a fuel cost of $0.00000109/therm. The HHV takes into account the latent heat of vaporization of water in the products of combustion, while the LHV does not. The net heating value accounts for this latent heat and therefore gives a more accurate picture of how much useful energy is actually produced by burning a given fuel. We can calculate the heating value . The percentages of these different gases vary depending on where the natural gas comes from. One calorie is also equal to about 4,184 joules. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Read More. International energy information, including overviews, rankings, data, and analyses. Also the solid fuels will have a similar quality variation for the different classes of fuel. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Natural gas is mostly methane (CH4), but it also contains small amounts of other gases like ethane (C2H6), propane (C3H8), butane (C4H10), and pentanes (C5H12). Crude oil, gasoline, heating oil, diesel, propane, and other liquids including biofuels and natural gas liquids. Fuel Gases - Heating Values Combustion heat values for gases like acetylene, blast furnace gas, ethane, biogas and more - Gross and Net values.
The higher the heating value, the more energy that is available for use. The heating values for liquid fuels in units of Btu/lb are calculated based on heating values in unit of Btu/gal and the corresponding fuels density values. FERC's regulations that included the thermal efficiency standard stated that "energy input" in the form of natural gas and oil "is to be measured by the lower heating value of the natural gas or oil." See 18 CFR 292.202(m). Required natural light and air: 8% of floor area of natural light, and 4% of floor area of air (operable window).Indiana Egress Window Code. Its an important number for businesses and homeowners alike because it allows you to understand how much energy youre using and how much it will cost to heat your home or office. As time goes on, people will start to recognize that the heating value of natural gas is decreasing. You can then use a simple formula to calculate the heating value. An example of data being processed may be a unique identifier stored in a cookie. The higher heating value (also known gross calorific value or gross energy) of a fuel is defined as the amount of heat released by a specified quantity (initially at 25C) once it is combusted and the products have returned to a temperature of 25C, which takes into account the latent heat of vaporization of water in the combustion products. You can target the Engineering ToolBox by using AdWords Managed Placements. We'll assume you're ok with this, but you can opt-out if you wish. The heat value of natural gas depends on how effective the thermal energy coming from the natural gas is. U.S. The main component that affects a fuels heating value is its carbon content. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Once you know the composition of your natural gas sample, you can use a calculator like this one to determine the heat value. This results in a lower number than HHV. When water vapor is the product, it is called the lower (or net) heating value (LHV). 0
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2. The calculation is demonstrated using both Excel and Openlab Chemstation Intelligent Reporting. 1.4.2 Firing Practices3-5 There are three major types of boilers used for natural gas combustion in commercial, industrial, and utility applications . Mechanical Engineering Thermodynamics Lec 32, pt 3 of 3: Heating Values, Find the gross or higher heating value of the fuel, This is the amount of heat released when the water vapor in the combustion products is condensed to liquid form, Subtract the latent heat of vaporization of water from the gross heating value to find the net or lower heating value, This is the amount of heat released when there is no condensation of water vapor in the combustion products, Divide by 1000 to convert units from British thermal units per pound (Btu/lb) to kilocalories per gram (kcal/g). Does EIA publish energy consumption and price data for cities, counties, or by zip code? To calculate the heating value, you need to know the composition of the gas and the temperature at which it was measured. By visiting The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions.The chemical reaction is typically a hydrocarbon or other . Coal characteristics assumed by GREET for electric power production. A barrel is a unit of volume or weight that is different depending on who uses the term and what it contains. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. Therefore: Natural gas is a fossil fuel that is formed when layers of buried plants and animals are exposed to intense heat and pressure over millions of years. How do I compare the cost of heating fuels? Do take into account the temperature at which the calorific values are referenced as well.00:00 Introduction00:47 Part 1: How to calculate Heating Value with Excel08:15 Part 2: How to calculate Heating Value with Openlab Chemstation Intelligent ReportingCopy the following VBA code to Intelligent Report Layout for Importing Superior heating Value, Inferior heating Value and Molar Mass to Openlab Chemstation. LHV = H (T1-T2) / 2 where Raw Shrimp: What Are They, and What Does It Mean? In 2020, the U.S. annual average heat content of natural gas delivered to consumers was about 1,037 Btu per cubic foot. !(b2fc5jQ(&+ NPYY4Wn[jWt*575,~$s]chB=+]u2k^|6GQ'"ozN;pFa^sZ)6PHnTIj|P+gqAWl74$
&7}QUesvjvV,J^cri-kIh,Ic4j-4~~QZd #8W:=@CkCtU>7"}2SOft[_mtE";QN5sjR7g<8. The heat produced by the combustion of a fuel is called its heating value, which is equal to the value of Hcomb but of opposite sign. When calculating the heating value of a fuel, the amount of heat released by combustion is divided by the total number of moles of oxygen required for combustion. This high energy content coupled with its clean burning nature makes natural gas an attractive choice as a boiler or furnace fuel. [4] The heating values in units of MJ/kg, are converted from the heating values in units of Btu/lb. Heating value is one of the key calculations in energy industry. The price is not set by the quantity of natural gas, but the quality and the heating value will determine how much an individual (or a country) will pay for this fuel. For example, even tap water is colder in winter, so it takes more time to boil it. This video provides a guideline on How To Calculate Heating Value of Natural Gas with some commonly found compounds. When it comes to understanding your energy consumption, the first step is knowing how to calculate heating value of natural gas. The BTU is a measure of energy, and one BTU is equal to about 1,055 joules. How to Make the Perfect Clove of Garlic:, This website uses cookies to improve your experience. Fuels are made up of different chemicals, and each fuel has a different chemical composition. 2023 - Know How Community. Natural gas has one of the highest net heating values per unit weight or volume compared to other fossil fuels up to 1,075 British thermal units per standard cubic foot (Btu/scf). NationalBureauofStandards Ubrar Admin.Bldg. The heating value can be calculated using the following equation: hv = qp + qs - qw where: hv = Heating value (kJ/kg) qp = Heat of combustion at constant pressure (kJ/kg) qs = Heat of combustion at constant volume (kJ/kg) Find the gross or higher heating value of the fuel We don't collect information from our users. Therefore, 100 cubic feet (Ccf) of natural gas equals 103,700 Btu, or 1.037 therms. Some of our calculators and applications let you save application data to your local computer. m~fQ[*&Jkaw-]z|O.T~J|2Sp:&+/ kWsN@M7hChO1ONqM+qK5sa9_vbz8D){w3bUz+Z! If you do not agree to the use of cookies, you should not navigate It is approximately the energy needed to heat one pound of water by 1 degree Fahrenheit. For example, suppose we have a fuel with the following composition: all the combustion products remain in gaseous state including the water vapor produced during the combustion is condensed. where: L L L is the latent heat. EIA's free and open data available as API, Excel add-in, bulk files, and widgets. Comprehensive data summaries, comparisons, analysis, and projections integrated across all energy sources. AddThis use cookies for handling links to social media. BTU is often used as a point of reference for comparing . The net or lower heating value is obtained by subtracting the latent heat of vaporization of the water vapor formed by the combustion from the gross or higher heating value. u,oYX0ajd`FiF `pmM@ e4
o 1* \T Q USDEPARTMENTOFCOMMERCE NationalBureauofStandards 1 barrel of residual fuel oil = 6,287,000 Btu. The HHV figure for liquid hydrogen in Btu/gal is based on personal communication with Ye Wu of Argonne National Laboratory. hbbd``b`$g !H0 [ D@}$)3018Y 0 $
We use different physical units to measure different types of energy or fuels: To compare fuels with each other, we need to convert their measurements to the same units. Tools to customize searches, view specific data sets, study detailed documentation, and access time-series data. The British Thermal Unit, or BTU, is a unit of measurement for heat energy. Net BTUs take into account the fact that some of the heat from burning fuel is used to vaporize water in the fuel itself (for example, in gasoline). For octane, the number of added carbon atoms beyond methane is 8 - 1 . 2. The heating values in units of MJ/kg, are converted from the heating values in units of Btu/lb. Higher Heating Values mean that more energy can be extracted from a given quantity of natural gas, and this usually results in a higher price for the gas. The. This site may use cookies. It is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. the amount of heat produced by combustion a unit quantity of a fuel, all products of the combustion are cooled down to the temperature before the combustion, the water vapor formed during combustion is condensed, subtracting the latent heat of vaporization of the water vapor formed by the combustion. %%EOF
Once we know that, we can use a standard formula to determine the amount of heat released during combustion. &1u1D Energy-Related Carbon Dioxide Emissions, Energy-Related Carbon Dioxide Emissions at the State Level, through 2018, Monthly Crude Oil and Natural Gas Production, Annual Solar Photovoltaic Module Shipments Report, Midwest and Rocky Mountain Transportation Fuels Markets, East Coast and Gulf Coast Transportation Fuels Markets. In the United States, Btu, a measure of heat energy, is the most common unit for comparing energy sources or fuels. How to Calculate Bundle Price Best 4 Ways to calculate, Build Your Spiritual Growth Through a Relationship with God, Calculating Crit Values for Genshin Impact Characters, How to Find Amazon Price Glitches Easy 7 Steps to Go, How to Calculate Price and Quantity Impact 4 Best Methods, Waterford Crystal Nativity Set: How to Make a Unique. We don't collect information from our users. block. How the calorific value (CV) of gas is calculated and how we determine the amount of energy transported by shippers and suppliers, which is used to bill gas consumers. Btu/gal and the corresponding fuel density values. The problem is that burning fossil fuels also releases harmful gases into the atmosphere, such as carbon dioxide and sulphur dioxide. If your first bedroom is at least 120 square feet, you get to call your second bedroom a bedroom if it's at least 70 square feet with 7' on a side. Visit our privacy The heating value of natural gas is a measure of the amount of heat that is released when the gas is burned. All Rights Reserved. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! It depends on the country and the pipelines, so the value can differ from 34 to 52 MJ/m3 (950 to 1,050 BTU/SCF). The components of natural gas determine the heat value of this fossil fuel. Cookies are only used in the browser to improve user experience. Natural gas is composed of methane, which is a molecule that contains carbon and hydrogen atoms. Energy use in homes, commercial buildings, manufacturing, and transportation. However, the scale is not that wide: natural gas producers must meet a lot of quality criteria and parameters before exporting their product. For just one phase, you'll have a single number, but otherwise, there's going to . Monthly and yearly energy forecasts, analysis of energy topics, financial analysis, congressional reports. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! You can use this calculator to obtain the heating value of a given mass or volume of hydrogen or other fuels, or to calculate the mass or volume given a certain heating value. Continue with Recommended Cookies, Use our online Natural Gas Calorific Value Calculator based on the ISO 6976 (2016) Natural gas Calculation of calorific values, density, relative density and Wobbe index from composition. Please read AddThis Privacy for more information. Net heating value (NHV) is a measure of a fuels ability to produce heat. Publisher - Always Right Answers To Community, The heating value of a fuel is the amount of heat released when the fuel is burned. {OZN%}k:_M9d>Ij5..N}'8J*GII/?M'/:=-}\^%=} In the case of natural gas the ratio of HHV to LHV is approximately 1.108:1. Regional energy information including dashboards, maps, data, and analyses. Notes: However, since every gas company uses their own units of calculating your cost of gas, it is important that you provide the correct unit cost, to get an accurate estimate. Heating value is a quantitative measure of heat content of a natural gas. Come test out some of the products still in development and let us know what you think! The heating value is the amount of heat released when a fuel is burned. In such an experiment, a stoichiometric mixture of the gas and oxygen is filled in the bomb calorimeter and then allowed to go through complete combustion. The most common type of natural gas used in North America has a heat value of around 40 MJ/m. Season factors also affect the feel of a decrease in heating value. The LHV, or lower heating value, takes into account the fact that some of the heat from combustion is used to vaporize water in the fuel. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'engineeringunits_com-large-mobile-banner-1','ezslot_4',126,'0','0'])};__ez_fad_position('div-gpt-ad-engineeringunits_com-large-mobile-banner-1-0');The Gross calorific Value is the amount of heat produced by a complete combustion of specified unit of quantity of fuel at constant pressure and all the products of the combustion are cooled down to the initial temperature before the reaction. ; Finally, all you need to do is sum up all heat values to calculate the energy needed to heat H 2 O. where C, H and O represent carbon, hydrogen and oxygen respectively. See Heat of combustion for examples of calculation of gross heating values from standard heat of formation of substances. data. Sign up for email subcriptions to receive messages about specific EIA products. 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