Improved system control logic for an MCHP system incorporating electric storage

Ummenhofer, Christoph D.; Heyer, Garth den; Roediger, Tim; Olsen, John; Page, John

doi:10.1016/j.apenergy.2017.06.035

Cited by 9 publications

(2 citation statements)

References 31 publications

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“…In the case of systems other than micro scale, operation without the cogeneration is also considered-electricity is generated and all the heat is dissipated. A paper in the literature [42] presented the least-cost mode (LC), which minimizes the cost of covering both heat and electricity demand in full by the cogeneration system.…”

Section: Operation Strategies For µChp Unitsmentioning

confidence: 99%

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An Experimental Data-Driven Model of a Micro-Cogeneration Installation for Time-Domain Simulation and System Analysis

2020

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In this article, an investigation of a free-piston Stirling engine-based micro-cogeneration (μCHP) unit is presented. This work is a step towards making the system calculations more reliable, based on a data-driven model, which enables the time-domain simulation of the μCHP behavior. A laboratory setup was developed that allowed for the measurement of a micro-cogeneration unit during long-term operation with a variable thermal load. The maximum efficiency of electricity generation was equal to 13.2% and the highest overall efficiency was equal to 95.7%. A model of the analyzed μCHP system was developed and validated. The simulation model was based on the device’s characteristics that were obtained from the measurements; it enables time-domain calculations, taking into account the different operating modes of the device. The validation of the system showed satisfactory compliance of the model with the measurements: for the period modeled of 24 h, the error in the heat generation fluctuated in the range 0.31–4.50%, the error in the electricity generation was in the range 2.48–4.70%, the error in the natural gas consumption was in the range 0.26–4.59%, and the engine’s runtime error was in the range 0.14–8.58%. The modelling process is easily applicable to other energy systems for detailed analysis.

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Section: Operation Strategies For µChp Unitsmentioning

confidence: 99%

“…There are also strategies which integrate model predictive control to search for the most appropriate operation mode [42,43]. The methods of optimal switching between different modes or optimal power modulation for the CHP unit have been the subject of extensive analysis in the literature.…”

Section: Operation Strategies For µChp Unitsmentioning

confidence: 99%