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Unveiling the mystery of Combined Heat & Power (cogeneration)

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  • Verbruggen, Aviel
  • Dewallef, Pierre
  • Quoilin, Sylvain
  • Wiggin, Michael

Abstract

The article unveils the mystery of cogeneration. Cogeneration is an add-on or embedded activity in thermal power plants, with as merit the use of part or whole of their point source heat exhausts. EU's talk of “high-efficiency cogeneration” is an unfounded transfer of responsibility from the hosting thermal power generation plant onto CHP (Combined Heat & Power) activity. The quality of a CHP activity is univocally defined by its design power-to-heat ratio σ, a tombstone parameter derived from the design characteristics of the power plant. A thermal power plant may house more than one cogeneration activity. Identifying σ requires positioning the bliss point in the electricity–heat production possibility set of the cogeneration activity. The bliss point is where after electric output is maximized, the sum of that output and the maximum recoverable quantity of heat occurs. Once CHP's mystery of virtual bliss points is unveiled, the proper σ are found. With known σ by CHP activity, the quantity of cogenerated electricity is reliably assessed as best indicator of cogeneration performance. Our analysis is applicable on all relevant thermal power cycles that host CHP activities, and illustrated with a numerical example. Our lean method is necessary and sufficient for proper CHP regulation.

Suggested Citation

  • Verbruggen, Aviel & Dewallef, Pierre & Quoilin, Sylvain & Wiggin, Michael, 2013. "Unveiling the mystery of Combined Heat & Power (cogeneration)," Energy, Elsevier, vol. 61(C), pages 575-582.
    • Handle: RePEc:eee:energy:v:61:y:2013:i:c:p:575-582
    DOI: 10.1016/j.energy.2013.09.029
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    References listed on IDEAS

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    Cited by:

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    4. Jimenez-Navarro, Juan-Pablo & Kavvadias, Konstantinos & Filippidou, Faidra & Pavičević, Matija & Quoilin, Sylvain, 2020. "Coupling the heating and power sectors: The role of centralised combined heat and power plants and district heat in a European decarbonised power system," Applied Energy, Elsevier, vol. 270(C).
    5. Gvozdenac, Dušan & Urošević, Branka Gvozdenac & Menke, Christoph & Urošević, Dragan & Bangviwat, Athikom, 2017. "High efficiency cogeneration: CHP and non-CHP energy," Energy, Elsevier, vol. 135(C), pages 269-278.
    6. Benalcazar, Pablo, 2021. "Optimal sizing of thermal energy storage systems for CHP plants considering specific investment costs: A case study," Energy, Elsevier, vol. 234(C).
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    8. Pablo Benalcazar & Jacek Kamiński & Karol Stós, 2022. "An Integrated Approach to Long-Term Fuel Supply Planning in Combined Heat and Power Systems," Energies, MDPI, vol. 15(22), pages 1-22, November.
    9. Wang, Jiawei & You, Shi & Zong, Yi & Cai, Hanmin & Træholt, Chresten & Dong, Zhao Yang, 2019. "Investigation of real-time flexibility of combined heat and power plants in district heating applications," Applied Energy, Elsevier, vol. 237(C), pages 196-209.
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