Please give me some advice on calculating the calorific value of mixed gases (urgent). Thank you very much.

Just find out the calorific value of each component in the mixture and then calculate it based on the composition. It’s so fast to write a small calculation program in EXCEL!

The heat that can be released by burning a certain volume or mass of gas is called the calorific value of the gas, also known as the calorific value of the gas. Its commonly used units are kilocalories/standard cubic meters (kcal/Nm3), kilojoules/standard cubic meters (KJ/Nm3) or megacal/standard cubic meters (Mcal/Nm3), megajoules/standard cubic meters (MJ/Nm3), with megajoules/standard cubic meters (MJ/Nm3) being the most commonly used. 　　The calorific value of gas is divided into high calorific value and low calorific value.: 　　1) High calorific value refers to the heat released when a specified amount of gas is completely burned and the generated water vapor is completely condensed into water. 　　2) Low calorific value refers to the heat released when a specified amount of gas is completely burned, the temperature of the combustion products is the same as the initial temperature of natural gas, and the generated water vapor remains in the gas phase. 　　The difference between the high and low calorific values ​​of gas is usually about 10%. When gas is burned, water vapor is produced. When the water vapor is cooled to the temperature of the gas before combustion, it not only releases the heat of the temperature difference, but also releases the heat of condensation of water vapor. Therefore, the high calorific value minus the condensation heat of water vapor is the low calorific value. During actual combustion, the water vapor does not condense and the heat of condensation cannot be utilized. When the composition is certain, just multiply the calorific value of each component by the ratio of each component.