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Sökning: onr:"swepub:oai:research.chalmers.se:eefe1499-7a70-4cbe-9d92-61ecd8312f5f" > Dynamic modeling fo...

  • Beiron, Johanna,1992Chalmers tekniska högskola,Chalmers University of Technology (författare)

Dynamic modeling for assessment of steam cycle operation in waste-fired combined heat and power plants

  • Artikel/kapitelEngelska2019

Förlag, utgivningsår, omfång ...

  • Elsevier BV,2019
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:research.chalmers.se:eefe1499-7a70-4cbe-9d92-61ecd8312f5f
  • https://doi.org/10.1016/j.enconman.2019.111926DOI
  • https://research.chalmers.se/publication/511869URI
  • https://research.chalmers.se/publication/512145URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • As the share of non-dispatchable energy sources in power systems increases, thermal power plants are expected to experience load variations to a greater extent. Waste-fired combined heat and power has multiple products and is today primarily operated for waste incineration and to generate heat. To consider load variations in the power demand at these plants may be a way to provide system services and obtain revenue, however, the transient interaction between power and district heating generation for the type of steam systems used should be studied. This work describes the transient characteristics and timescales of cogeneration steam cycles to discuss the operational interactions between power and district heating generation. A dynamic model of the steam cycle of a 48 MW waste-fired combined heat and power plant is developed using physical equations and the modeling language Modelica. The model is successfully validated quantitatively for both steady-state and transient operation with data from a reference plant and is shown capable of characterizing the internal dynamics of combined heat and power plant processes. Simulations are performed to analyze steam cycle responses to step changes, ramps and sinusoidal disturbances of boiler load changes and variability in district heating inlet temperature and flow. The results give insight on the process timescales for the specific case studied; for example, with the present design a 10% boiler load change requires up to 15 min for responses to settle, while the corresponding time for a 10% change in district heating flow or temperature show settling times within 5 min. Furthermore, increasing the boiler ramp rate from 2 to 4%/min could reduce the rise time of power generation by 42%, which could be of economic significance in day-ahead power markets.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Mocholí Montañés, Rubén,1990Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)mochol (författare)
  • Normann, Fredrik,1982Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)normann (författare)
  • Johnsson, Filip,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)fijo (författare)
  • Chalmers tekniska högskola (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Energy Conversion and Management: Elsevier BV1980196-8904

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