combustion wizard
'there is not such thing as too much information'
combustion wizard
'there is not such thing as too much information'
Many different standards are used worldwide to define a 'Gas Rate'. The most used standard in Europe is the 'Normal' condition described as Nm3 or (n). Where in the UK and US the 'Standard' condition described as STP or (s) is used as standard.
It should also be noted that the International Organization for Standardization (ISO), the United States Environmental Protection Agency (EPA) and National Institute of Standards and Technology (NIST) each have more than one definition of standard reference conditions in their various publications.
Therefore, it's needed to specify the definition in more detail to avoid confusion. Inside the Combustion Wizard app, we use the conditions as mentioned below.
METRIC
Normal conditions
= 0°C (273.15K) and 1,013.25 Mbar
Standard conditions
= 20°C (293.15K) and 1,013.25 Mbar
IMPERIAL
Standard conditions
= 60°F and 14.73 psia
The quantity known as higher heating value (HHV) (or gross energy or upper heating value or gross calorific value (GCV) or higher calorific value (HCV) is determined by bringing all the products of combustion back to the original pre-combustion temperature, and in particular condensing any vapor produced. Systems such as condensing gas-fired boilers are suited for capturing the HHV as the heat delivered is at temperatures below 150 °C / 302 °F
"The water of combustion is entirely condensed and the heat contained in the water vapor is recovered"
The quantity known as lower heating value (LHV) (net calorific value (NCV) or lower calorific value (LCV) is determined by subtracting the heat of vaporization of the water vapor from the higher heating value. This treats any H2O formed as a vapor. The energy required to vaporize the water therefore is not released as heat.
LHV calculations assume that the water component of a combustion process is in vapor state at the end of combustion, as opposed to the higher heating value (HHV) (a.k.a. gross calorific value or gross CV) which assumes that all the water in a combustion process is in a liquid state after a combustion process.
"The water vapor and the heat in the water vapor is not recovered"
The fuel database is built with help from combustion engineers, gas companies, equipment manufacturers from all over the world, to have the most accurate data available.
Our aim is to add more countries upon user request, but we need your help.
Please send us the fuel details used in your country and we will add them.
The Combustion Wizard is designed by a highly experienced combustion engineer that liked to see an app capable of helping in his daily routine. Design, formulas, new features, improvements, updates, hosting are all done by the engineer, but coding the app itself is done by a freelance coding expert. This to warrant a solid app quality, frequent updates to the newest hardware and software versions as soon as they become available on the market.
As seen often apps are not updated or improved due to lack of funds or time of the individual. We like Combustion Wizard to be free of advertising to the end of time however, we also like to add many more new features in the future to come. So, we have decided to charge a reasonable amount to make this possible.
Yes, it will available, we are developing IOS version at the moment. The initial release is planned by the end of 2019.