Integrated Simulation of the Gas-Turbine Cogeneration System Operating on the Biogas Fuel

Abstract

The integrated system of a change in the pipeline water temperature was suggested to measure the reverse pipeline water temperature and the gas temperature to maintain the operation of biogas plant using the thermal pump that uses the fermented wort as a low potential energy source. For this purpose, we developed the architecture of gas-turbine cogeneration system that is based on the integrated dynamic subsystem that includes the biogas plant, the heat pump, the gas turbine cogeneration plant and the heat utilization plant. Other units that are included into the composition of gas turbine cogeneration system are the discharge and charge units and functional efficiency estimation unit that interact in agreement with the dynamic subsystem. Reference and functional estimates of a change in the temperature of pipeline water were obtained on the basis of mathematical simulation of the dynamics of heat utilization plant. Control systems of the working capacity and the identification of the state of heat utilization plant were developed using the suggested mathematical description. The discharge-charge of biogas plant, the fermented wort draining and the loading of fresh material maintain the charge -discharge of gas turbine cogeneration system. Decision making after a change in the number of plates of the heat utilization plant allows for the coordination of production and consumption of the electric energy and the heat. It results in the decrease of the cost price of energy production by 20 to 30 % with an increase in the marketable value of the biogas plant by 15 %.