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Performance and profitability perspectives of a CO2 based district energy network in Geneva's City Centre

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  • Henchoz, Samuel
  • Weber, Céline
  • Maréchal, François
  • Favrat, Daniel

Abstract

A new type of district energy network providing simultaneously heating and cooling services is being investigated. It is based on the use of CO2 as a heat transfer fluid by taking advantage of the latent heat of vaporization, to store and transfer heat across the network. The goal of the present study is to determine the performance of a CO2 network when applied to a real urban area. It focuses first on determining the requirements for the various thermal energy services for a part of Geneva's City Centre. The final energy consumption is first computed for the energy conversion technologies now in place in this area – namely heating oil boilers and air cooled compression chillers. Then the new final energy consumption is computed considering that a CO2 network is used instead of boilers and air cooled compression chillers. For the area considered the CO2 network's variant leads to a final energy consumption of 10,968 MWh of electricity. It represents a reduction of 84.4% when compared to the boilers and chillers case. A comparative profitability analysis of the two cases is also presented. The analysis takes into account investment, heating oil and/or electricity, equipment replacement, operation, and maintenance costs, as well as the sales of energy services.

Suggested Citation

  • Henchoz, Samuel & Weber, Céline & Maréchal, François & Favrat, Daniel, 2015. "Performance and profitability perspectives of a CO2 based district energy network in Geneva's City Centre," Energy, Elsevier, vol. 85(C), pages 221-235.
    • Handle: RePEc:eee:energy:v:85:y:2015:i:c:p:221-235
    DOI: 10.1016/j.energy.2015.03.079
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    References listed on IDEAS

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    1. Henchoz, Samuel & Buchter, Florian & Favrat, Daniel & Morandin, Matteo & Mercangöz, Mehmet, 2012. "Thermoeconomic analysis of a solar enhanced energy storage concept based on thermodynamic cycles," Energy, Elsevier, vol. 45(1), pages 358-365.
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    4. Weber, Céline & Favrat, Daniel, 2010. "Conventional and advanced CO2 based district energy systems," Energy, Elsevier, vol. 35(12), pages 5070-5081.
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    Cited by:

    1. Ungar, Pietro & Schifflechner, Christopher & Wieland, Christoph & Spliethoff, Hartmut & Manfrida, Giampaolo, 2024. "Thermo-economic comparison of CO2 and water as a heat carrier for long-distance heat transport from geothermal sources: A Bavarian case study," Energy, Elsevier, vol. 298(C).
    2. Tianyang Ge & Wenjun Hou & Yang Xiao, 2023. "Study on the Regeneration of City Centre Spatial Structure Pedestrianisation Based on Space Syntax: Case Study on 21 City Centres in the UK," Land, MDPI, vol. 12(6), pages 1-26, June.
    3. Henchoz, Samuel & Chatelan, Patrick & Maréchal, François & Favrat, Daniel, 2016. "Key energy and technological aspects of three innovative concepts of district energy networks," Energy, Elsevier, vol. 117(P2), pages 465-477.
    4. Raluca Suciu & Paul Stadler & Ivan Kantor & Luc Girardin & François Maréchal, 2019. "Systematic Integration of Energy-Optimal Buildings With District Networks," Energies, MDPI, vol. 12(15), pages 1-38, July.
    5. Zhai, Chong & Wu, Wei, 2022. "Energetic, exergetic, economic, and environmental analysis of microchannel membrane-based absorption refrigeration system driven by various energy sources," Energy, Elsevier, vol. 239(PB).
    6. Nagano, Takahiro & Kajita, Jungo & Yoshida, Akira & Amano, Yoshiharu, 2021. "Estimation of the utility value of unused heat sources for a CO2 network system in Tokyo," Energy, Elsevier, vol. 226(C).
    7. Suciu, Raluca & Girardin, Luc & Maréchal, François, 2018. "Energy integration of CO2 networks and power to gas for emerging energy autonomous cities in Europe," Energy, Elsevier, vol. 157(C), pages 830-842.
    8. Ferrari, Simone & Zagarella, Federica & Caputo, Paola & D'Amico, Antonino, 2019. "Results of a literature review on methods for estimating buildings energy demand at district level," Energy, Elsevier, vol. 175(C), pages 1130-1137.

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