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Experimental and numerical study on self-sustaining performance of a 30-kW micro gas turbine generator system during startup process

Guan, Jin; Lv, Xiaojing; Spataru, Catalina; Weng, Yiwu; (2021) Experimental and numerical study on self-sustaining performance of a 30-kW micro gas turbine generator system during startup process. Energy , 236 , Article 121468. 10.1016/j.energy.2021.121468. Green open access

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Abstract

The safe startup of micro gas turbine (MGT) generator system is the premise of normal operation. The whole start-up process contains motor startup, ignition, speed acceleration, motor switching to generator and power acceleration. Motor switching to generator happens at the self-sustaining state, which is significant to safe start-up process. However, characteristics of MGT generator system at self-sustaining state are hardly to investigate due to the lack of performance maps and complete experiments. Therefore, this work analyzed start-up schedule and presented a theoretical and experimental study on the self-sustaining performance of MGT generator system, based on the self-designed 30 kW MGT generator system built in Jiangjin Turbocharger Plant, China. The self-sustaining speed boundary and fuel consumption area is determined from the aspects of safe startup. A novel principle for determining the self-sustaining point (SSP) is proposed. Results show that the self-sustaining state can be achieved only when speed is over 26,750 rpm, and the SSP is determined at the speed of 30,750 rpm based on the proposed principle. Finally, the self-sustaining TIT and natural gas flow are compared with the experimental data, with two relative errors both almost within 4%. This method is instructive to the MGT generator system startup process.

Type: Article
Title: Experimental and numerical study on self-sustaining performance of a 30-kW micro gas turbine generator system during startup process
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.energy.2021.121468
Publisher version: https://doi.org/10.1016/j.energy.2021.121468
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: Micro gas turbine; Start-up schedule; Self-sustaining boundary; Fuel consumption area; Experimental validation; Uncertainty analysis
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10147410
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