A simple and convenient model to analyze the composition of the syngas has been implemented. We collect thermodynamic properties data from JANAF tables and Turns’ book. By regression analysis the Gibb’s energy functions of temperature were got. Through these functions, the equilibrium constants as functions of temperature can be deduced for the related chemical reaction in gasification process. With the equilibrium constants, the model to calculate the equilibrium composition for pure carbon gasification has been established. The model was improved from considering only isothermal reaction to including reaction heat balance and then finally with fully energy balance consideration. Since the model has been implemented on general software Excel, it will be very easy for users to apply in further study. Finally, we show how precise the estimation could be by doing comparison with early study and utilize this tool to analyze the heat balance for a specific IGCC cogeneration power plant.

In this paper, we propose an all-digital, cyclic and synthesizable TDC architecture, which may be used as a core block in ADPLLs to replace the analog block as a phase/frequency detector and a charge pump. Traditional designs of the DVFS scheme for multidomain power management are based on a conventional analog PLL to generate the dynamic voltage and frequency in which the use of a digital TDC eliminates the need for current sources in conventional analog PLLs.