SummerResearchPoster2016
1
Data Acquisition System For Isothermal Compression Dr. Jordan T. Farina, Khang Tran, Phillip Tran, Zachary Villarmia. Shiley School of Engineering, University of Portland Compression of natural gas from low pipeline pressure to the high pressures needed for storage and various applications occur across a spectrum of scales, ranging from large natural gas fired combustion turbines to small residential automotive refueling stations. Typical compressors consist of multiple compression stages that couple with inter-coolers in between to remove the heat generated during compression. However, this process is commonly plagued with issues such as reliability, contamination, and efficiency. Currently, Carnot Compression LLC, a California-based engineering company, is working in conjunction with Northwest Natural Gas from Portland, Oregon as part of a consortium to develop and finalize the design of its patent-pending isothermal compressor that could lower the infrastructure costs for vehicle refueling while increasing reliability (and scalability), and that could drive greater adoption of natural gas as a transportation fuel. This research focuses on the design and construction of a Data Acquisition System that will test and verify the performance of the compressor prototype by implementing the usage of DAQ hardware, sensors, and LabVIEW application, as well as thermodynamics properties database from F-Chart Engineering Equation Solver Software. Abstract Background and Motivation Capabilities of Data Acquisition System Data Acquisition System Schematic Results • Isothermal compression is projected to cut the utilized energy by 30% or more over conventional technology. • Reliability, contamination, and efficiency will be greatly improved over current multi-stage compression process. • Data Acquisition System aims at validating system performance for isothermal technology in a real world setting. • Data acquisition is completely shielded and grounded to avoid any EMI that could potentially disturb the signals. • System is capable of 250 kS/s aggregate sampling rate with ±200 mV, ±1, ±5, and ±10 V programmable input ranges for measurement of pressure transducers and hall effect sensors. • NI-9211 Module provides ±80 mV analog inputs, 24-bit resolution, as well as 50/60 Hz noise rejection that further improves the accuracy of thermocouples measurement. • LabVIEW program, which includes Methane thermal properties table, is capable of collecting, interpolating, and providing appropriate enthalpy values over a wide range of pressure and temperature. Acknowledgements: Thanks to Dean Sharon Jones and Oregon Alliance of Independent Colleges & Universities (The Alliance) for the financial support of this project, as well as Dr. Jordan Farina, Dr. Heather Dillon, and Christopher Galati for mentoring throughout the research. Additional thanks to Jacob Amos, Jared Rees, and Allen Hansen for shop training and fabrication. Discussion and Conclusion • By implementing different models of thermodynamic analysis of Methane, the results from Figure 2 serves as an important theoretical foundation for future work. • Other factors needed to be considered during the application of the data acquisition system include the position of the sensors, more specifically the Hall Effect sensor, in order to obtain accurate data. • Data acquisition system is an important part of this project, and by building a solid test bed based on accurate theoretical work, the system will be capable of collecting important information that provides a verification of the concept of isothermal compression that is implemented in Carnot’s compressor. • Collecting temperature, pressure, and RPM of Carnot’s isothermal compressor to determine the efficiency and compare with current compression process. • Supporting data collection and testing for Senior Capstone project, Micro Gas Bubble Separation Experiment. • Future deliverable to Northwest Natural Gas as the main DAQ system for compressor testing purposes. • Serve as a framework for future capstone projects that involve data collection and analysis. Future Applications References "Consortium to Test Disruptive Compression Technology for CNG Refueling." Business Wire. N.p., 26 Jan. 2016. Web. 15 Sept. 2016. Figure 1: Front panel for LabVIEW program. Figure 2: Comparison between real and ideal methane gas with the conditions of isentropic and isothermal. These results establish the amount of work needed to compress methane to 250 bar (3600 psi) when the gas are in the aforementioned conditions. Figure 3: Final data acquisition system. The BNC and thermocouples connection allow data transmission from the compressor to the NI-DAQ acquisition device.
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Transcript of SummerResearchPoster2016
Data Acquisition System For Isothermal Compression Dr. Jordan T. Farina, Khang Tran, Phillip Tran, Zachary Villarmia. Shiley School of Engineering, University of Portland
Compression of natural gas from low pipeline pressure to the high pressures needed for storage and various applications occur across a spectrum of scales, ranging from large natural gas fired combustion turbines to small residential automotive refueling stations. Typical compressors consist of multiple compression stages that couple with inter-coolers in between to remove the heat generated during compression. However, this process is commonly plagued with issues such as reliability, contamination, and efficiency. Currently, Carnot Compression LLC, a California-based engineering company, is working in conjunction with Northwest Natural Gas from Portland, Oregon as part of a consortium to develop and finalize the design of its patent-pending isothermal compressor that could lower the infrastructure costs for vehicle refueling while increasing reliability (and scalability), and that could drive greater adoption of natural gas as a transportation fuel. This research focuses on the design and construction of a Data Acquisition System that will test and verify the performance of the compressor prototype by implementing the usage of DAQ hardware, sensors, and LabVIEW application, as well as thermodynamics properties database from F-Chart Engineering Equation Solver Software.
Abstract
Background and Motivation
Capabilities of Data Acquisition System
Data Acquisition System Schematic
Results • Isothermal compression is projected to cut the utilized energy by 30% or
more over conventional technology. • Reliability, contamination, and efficiency will be greatly improved over
current multi-stage compression process. • Data Acquisition System aims at validating system performance for
isothermal technology in a real world setting.
• Data acquisition is completely shielded and grounded to avoid any EMI that could potentially disturb the signals.
• System is capable of 250 kS/s aggregate sampling rate with ±200 mV, ±1, ±5, and ±10 V programmable input ranges for measurement of pressure transducers and hall effect sensors.
• NI-9211 Module provides ±80 mV analog inputs, 24-bit resolution, as well as 50/60 Hz noise rejection that further improves the accuracy of thermocouples measurement.
• LabVIEW program, which includes Methane thermal properties table, is capable of collecting, interpolating, and providing appropriate enthalpy values over a wide range of pressure and temperature.
Acknowledgements: Thanks to Dean Sharon Jones and Oregon Alliance of Independent Colleges & Universities (The Alliance) for the financial support of this project, as well as Dr. Jordan Farina, Dr. Heather Dillon, and Christopher Galati for mentoring throughout the research. Additional thanks to Jacob Amos, Jared Rees, and Allen Hansen for shop training and fabrication.
Discussion and Conclusion • By implementing different models of
thermodynamic analysis of Methane, the results from Figure 2 serves as an important theoretical foundation for future work.
• Other factors needed to be considered during the
application of the data acquisition system include the position of the sensors, more specifically the Hall Effect sensor, in order to obtain accurate data.
• Data acquisition system is an important part of this
project, and by building a solid test bed based on accurate theoretical work, the system will be capable of collecting important information that provides a verification of the concept of isothermal compression that is implemented in Carnot’s compressor.
• Collecting temperature, pressure, and RPM of Carnot’s isothermal compressor to determine the efficiency and compare with current compression process.
• Supporting data collection and testing for Senior Capstone project, Micro Gas Bubble Separation Experiment.
• Future deliverable to Northwest Natural Gas as the
main DAQ system for compressor testing purposes.
• Serve as a framework for future capstone projects that involve data collection and analysis.
Future Applications
References "Consortium to Test Disruptive Compression Technology for CNG Refueling." Business Wire. N.p., 26 Jan. 2016. Web. 15 Sept. 2016.
Figure 1: Front panel for LabVIEW program.
Figure 2: Comparison between real and ideal methane gas with the conditions of isentropic and isothermal. These results establish the amount of work needed to compress methane to 250 bar (3600 psi) when the gas are in the aforementioned
conditions.
Figure 3: Final data acquisition system. The BNC and thermocouples connection allow data transmission from the compressor to the NI-DAQ acquisition device.
