Modelling of gas-fired boiler systems for building/HVAC plant simulation

The current models of boilers and furnaces which are used in HVAC system simulation programs are primarily concerned with calculating the heat output of the device and its fuel consumption. The formulation of the models relies heavily on empirical terms which are derived from manufacturers' data or testing programmes. 
Detailed simulation. of the combustion process involves solution of the flow-field. and chemical reaction rate equations by CFD simulation. The computational intensiveness involved renders this approach infeasible for integration into plant simulation. programs. 
The objective of this research is to investigate the feasibilty of increasing the functionality and integrity of boiler models to include combustion and pollutant formation processes whilst retaining their usability within HVAC simulation environrnents.