Дослідження режимів роботи електротехнологічного комплексу під час генерації електроенергії із біогазуДослідження режимів роботи електротехнологічного комплексу під час генерації електроенергії із біогазу

Н. В. Бурега

Анотація


RESEARCH MODES OF ELECTROTECHNOLOGICAL OBJECT IN ELECTRIC POWER GENERATION FROM BIOGAS

N. V. Burega

 

Formulation of the problem. Analysis of world experience has shown exponential growth capacity biogas plants in countries with similar climatic features to Ukraine and organic raw materials, which is an indicator of economic feasibility of this technology.

Existing electric generating system which is widely used in BSU can be significantly streamlined through the use of solid oxide fuel cells (SOFC), which at one stage of technological convert chemical fuel (H2 and CH4) in electricity. This approach will improve the efficiency of the process of power generation phase to η = 60-70%, which is much higher than internal combustion engines and steam turbine (η = 20% and η = 45%).

The aim of the study. Starting modes of research-based simulation model complex electrical installation of biogas use solid oxide generator for increasing the efficiency of electricity generation.

Results. Developed simulation model subsystem management regimes loading, unloading, mixing raw biomaterials in the reactor, designed subsystem thermal conductivity of the walls reactor, taking into account factors material of manufacture, which allowed to consider thermal losses during the modeling process of biogas generation when the temperature of the environment.

Modernized library model Simulink, fuel cell solid oxide, and built a subsystem of thermal energy recovery of exhaust gas for thermal treatment of anaerobic fermentation.

Model electrotechnological complex allowed to determine: the minimum required fuel stack power output for biogas installation on the nominal mode ninth time out; Overall energy consumption with consideration of wastewater biogas and ambient temperature.

Findings. To study starting modes of electrical complex was analyzed market of biogas technology, selected the most commercially attractive installation generating chemical energy from biomass. Improved method of converting chemical energy of biogas in electricity efficiency of 60%, by replacing the internal combustion engine in electrochemical source based SOFCs. Improved method of converting chemical energy of biogas in electricity efficiency of 60%, by replacing the internal combustion engine in electrochemical source based SOFC. The developed simulation model based on SOFC capacity of 120 kW with an average generation of 2,866 kW • h of electricity and 1121 kW • h of heat; volume 903 m3 reactor installations with a maximum daily performance of biogas generation at 2013 m3. A simulation model allowed to calculate the starting modes and settings of wastewater CH4 to the level of 99.7% at 40 m3 / h for 1065 m3 of biomethane throughout the day and an initial storage capacity of 14,000 m3 n biomethane for complex offline.


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Посилання


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