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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Blieske, Matthew Gauthier, J. E. D. Huang, X. |
| Copyright Year | 2008 |
| Abstract | To bring the economic benefit of trigeneration to small-scale users without incorporating expensive components, an inverted Brayton cycle (IBC) is employed which makes use of the expander section already present in a microturbine. An air accumulator provides pressurized air, which is passed through the expander section of the same microturbine used to charge the accumulator. The air passing through the IBC is cooled due to expansion, simultaneously providing power and cooling flow. As the microturbine is indirectly fired, the flow passing through the engine or IBC can be directly vented into the household; eliminating the need for additional heat exchangers. The size of the cycle studied is on the order of 10 kW(e), suitable for a domestic household, however the system is easily scaled for larger commercial applications. The majority of the components in the system studied are ‘off the shelf’ products. A feasibility study was conducted to ensure the proposed system is economically competitive with systems currently used, such as individual generation provided by an air conditioner, high efficiency natural gas furnace, and grid power. Simulations were run for a full year based on actual external temperature, electrical, and thermal loads for a single family detached dwelling located in Winnipeg, Canada. Performance data was generated using Matlab™ while economic performance was determined with time-based simulations conducted using Simulink™. The system is designed to allow energy islanding by providing for all household energy needs throughout the year, however integration with a power grid is optional. It was found the operating costs for the proposed trigeneration system in an energy islanding mode of operation were marginally higher than individual generation (A/C unit, NG furnace, grid power) during heating modes of operation, and more expensive for cooling modes of operation. The yearly energy cost for the trigeneration system exceeded the individual generation costs by 30 to 40%, however there remains much room for improvement to the trigeneration concept. All economic data was based upon fair market energy prices as found in central Canada. |
| Sponsorship | International Gas Turbine Institute |
| Starting Page | 679 |
| Ending Page | 688 |
| Page Count | 10 |
| File Format | |
| ISBN | 9780791843116 |
| DOI | 10.1115/GT2008-50568 |
| e-ISBN | 0791838242 |
| Volume Number | Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Manufacturing, Materials and Metallurgy; Microturbines and Small Turbomachinery |
| Conference Proceedings | ASME Turbo Expo 2008: Power for Land, Sea, and Air |
| Language | English |
| Publisher Date | 2008-06-09 |
| Publisher Place | Berlin, Germany |
| Access Restriction | Subscribed |
| Subject Keyword | Performance evaluation Cycles Temperature Cooling Power grids Brayton cycle Secondary cells Heat exchangers Flow (dynamics) Engines Stress Design Storage Furnaces Simulation Heating Engineering simulation Air conditioners Natural gas Microturbines |
| Content Type | Text |
| Resource Type | Article |
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