Click on an icon to launch a daemon.
Separated (nonpremixed) Reactants Click to Launch Applet (Takes a Few Seconds) Fuel and oxidizer are separated. Set up the reaction as fuel+oxidizer-->products. In the state panel, evaluate the states of fuel, oxidizer and products. The combustion device (device panel) has two inlets, i1 and i2, one for fuel and one for oxidizer, and one exit (e) for the products. Use this daemon not only for energy or entropy analysis of a combustor, but also for balancing a combustion reaction (for given products analysis, excess or deficient air, fuel's ultimate analysis, etc.).

Example: Fuel and air enter through separate inlets into a combustion chamber and burns adiabatically. Using this daemon, you can calculate the exit state (adiabatic flame temperature), and do an energy and entropy analysis of the combustor. The products composition is frozen by the reaction panel, where a complete reaction with excess or deficient air can be readily set up.

Premixed Reactants Click to Launch Applet (Takes a Few Seconds)

Reactants (fuel and oxidizer) are premixed. Set up the reaction as reactants-->products. In the state panel, evaluate the states of reactants and products. The device panel has only one inlet (i-state) and one exit (e-state). The products composition is frozen once the reaction is set up.

Example: A mixture of methane and air enters an adiabatic combustor and burns at steady state. You can use this daemon to determine the exit temperature provided the products composition are known. Energy and entropy analysis of any reaction, not just combustion, can be carried out with this daemon.

Chemical Equilibrium Click to Launch Applet (Takes a Few Seconds)

The initial mixture composition (by mass, volume, or mole) and the products species (just the names) are specified. For a given pressure and temperature the daemon calculates the equilibrium composition and the complete products state by minimizing the Gibb's function.

Example: A mixture of methane and air enters an adiabatic combustor and burns at steady state. Determine the products composition at the exit, given the the pressure and temperature at the exit.

Chemical Equilibrium with Web Service

Click to Launch Applet (Takes a Few Seconds)

Using the power of web service, the data base used is expanded to more than a thousand species from various sources including NASA and NIST. While the stand-alone daemon has abou 200 species, this daemon currently loads more than 1500 species.

Example:A mixture of methane and air burns steadily in a combustion chamber. Determine the products composition that includes many exotic species, given the the pressure and temperature at the exit.

Loading of this daemon may take about 30 seconds.

Balance Equations  Read Chapter-3: Thermodynamics - A Problem Solving Approach by Bhattacharjee
Copyright 1998-: Subrata Bhattacharjee