Abstract
Biogas fueled generator has a unique character because the converter kit on the generator has the characteristic of absorbing the biogas supply. Therefore, in this study, biogas is accommodated in a plastic container equipped with a valve that can adjust the amount of biogas supply pressure. Combustion in the Genset combustion chamber will occur if the ratio of air supply and supply of biogas (AFR = Air to Fuel Ratio) meets the stoichiometric number. So a ratio control is needed on air supply and biogas supply, which can follow changes in biogas conditions in plastic bags and generator loads. For this reason, this paper presents an ECU (Electronic Control Unit) that can regulate the ratio of air supply to biogas supply by using a servo motor valve, which is commanded by a control signal from the ECU. The resulting ECU prototype is equipped with a multi-input connector (to receive the signal output of CH 4 methane gas sensor and the biogas supply pressure sensor), multi-output (control signal to the servo motor valve), and multi regulators to adjust the Set Point value for the methane gas content CH4, the value of the set point of the biogas supply pressure and to tune the value of the proportional gain control (KP). The results of the ECU performance test by trial and error by giving a dummy input signal (analogy to the signal output of methane gas sensor and the analog of the pressure sensor output signal in the form of an electric voltage generated from the signal generator) can drive the servo motor, valve air supply, and servo motor, valve supply biogas. Accordance with the gain control input from the regulator.
Highlights
Creating Input Of A Methane Gas Sensor And A Biogas Supply Pressure SensorThe Electronic Control Unit (ECU) is used to control the operation of a biogasfueled generator (maintaining stability) by manipulating the air supply and the supply of biogas to the converter kit so that the generator set produces electricity with a frequency according to the set point [6]
Abstract⎯ Biogas fueled generator has a unique character because the converter kit on the generator has the characteristic of absorbing the biogas supply
That operators have to arrange air supply and regulate biogas supply by trial and error, this is because the methane gas content of CH4 in biogas changes according to changes in the type of food and environmental conditions of the bioreactors used for biogas extraction from livestock manure [2]
Summary
The ECU is used to control the operation of a biogasfueled generator (maintaining stability) by manipulating the air supply and the supply of biogas to the converter kit so that the generator set produces electricity with a frequency according to the set point [6]. The operation of a biogasfueled generator is strongly influenced by the quality of the biogas used (methane gas content CH4) [7] and the supply of biogas supply pressure to the converter kit. The opening air supply valve and the biogas supply valve opening regulated by the control signal generated by the ECU using a mode proportional. The pressure sensor must be able to measure the biogas supply pressure, which is very weak and sensitive to changes in pressure values [9]. E. MIMO ECU performance testing The performance of the ECU prototype that will be implemented in a biogas-fueled generator is tested by providing a dummy test signal in the form of an analog voltage with the output signal of methane CH4 gas sensor and the pressure sensor, and observing the opening servo motor valve air supply and opening servo motor valve supply biogas. The test results show that the ECU can read the 10-bit analog input signal with the methane gas content value CH4 as shown in the histogram of Figure 6 (changes in the value of data bits are proportional to changes in the value of methane gas content CH4)
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