Optimization for Biogas Power Plants using Automatic Control of Gas Pressures
In many cases, gas storages on biogas power plants are not used optimally to store gas as much as their capacity. The digester is sometimes overload to store gas and the controller cannot deliver gas to other storage. Consequently, gas is often released from digester to avoid over pressure. At the end, biogas power plant has less efficiency. Hence, a mechanism to control gas pressure to make different pressure between its storages is required. Fans were used to manipulate the most majority system pressures on a biogas power plant using frequency converters. Measurements, simulations, and experiments were conducted to create a new system on a biogas power plant. A controller, Programmable Logic Controller was used to control the entire system pressure using Proportional-Integral-Derivative algorithm. When the gas pressures are not in the allowable range of pressure, then the controller changes the fans’ frequency to the desired conditions. As a result, gas moves to another storage and system pressures are in the allowable range.
The Design and Qualification of a Hydraulic Hardware-in-the-Loop Simulator
iii ACKNOWLEDGEMENTS Special thanks go to my advisor, Dr. Book, for his support and guidance throughout this project and to my committee members Dr. Sadegh and Dr. Paredis. Our lab research engineer, James D. Huggins, was instrumental to getting a working system and teaching me the ways of the hydraulic world. This work would not have been possible without the generous support of many companies involved with the Fluid Power and Motion Control Center. Notable contributions for this project came from Siemens, which donated the electric motors, would like to thank my sage officemates, Amir Shenuda and Matt Kontz, for the never ending consultations the shared office obliged them to give.
Trends in kiln drives
The heart of the cement plant is the rotary kiln, and continuous quality production of cement clinker depends on the continuous accurate performance of the rotary kiln drive.