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Optimal sizing of residential gas engine cogeneration system for power interchange operation from energy-saving viewpoint

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  • Wakui, Tetsuya
  • Yokoyama, Ryohei

Abstract

A power interchange operation, in which electricity generated by residential gas engine cogeneration systems is shared among the residences in a housing complex without a reverse power flow to a commercial electric power system, has a high energy-saving effect. In this study, the optimal sizing of the residential gas engine cogeneration system for the power interchange operation is discussed from the energy-saving viewpoint by conducting optimal operational planning based on mixed-integer linear programming. First, the scale effect of the residential gas engine cogeneration system on its performance is identified from the nominal performances of commercial devices. Then, the energy-saving effect of the power interchange operation is analyzed from the optimal operation patterns for various system scales. The result shows that the energy-saving effect increases with the system scale because the heat to power ratio of the system decreases and approaches that of the demand because of the increase in generating efficiency. However, systems with a rated electric output larger than 1 kW exhibit almost the same energy-saving effect. Hence, it is concluded that a system with a rated electric output of 1 kW, which is a commercial device for residential applications, is the optimal scale for the power interchange operation.

Suggested Citation

  • Wakui, Tetsuya & Yokoyama, Ryohei, 2011. "Optimal sizing of residential gas engine cogeneration system for power interchange operation from energy-saving viewpoint," Energy, Elsevier, vol. 36(6), pages 3816-3824.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:6:p:3816-3824
    DOI: 10.1016/j.energy.2010.09.025
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    References listed on IDEAS

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    1. Wakui, Tetsuya & Yokoyama, Ryohei & Shimizu, Ken-ichi, 2010. "Suitable operational strategy for power interchange operation using multiple residential SOFC (solid oxide fuel cell) cogeneration systems," Energy, Elsevier, vol. 35(2), pages 740-750.
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    3. Wakui, Tetsuya & Yokoyama, Ryohei, 2015. "Impact analysis of sampling time interval and battery installation on optimal operational planning of residential cogeneration systems without electric power export," Energy, Elsevier, vol. 81(C), pages 120-136.
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    7. Wakui, Tetsuya & Yokoyama, Ryohei, 2014. "Optimal structural design of residential cogeneration systems in consideration of their operating restrictions," Energy, Elsevier, vol. 64(C), pages 719-733.
    8. Wakui, Tetsuya & Kawayoshi, Hiroki & Yokoyama, Ryohei, 2016. "Optimal structural design of residential power and heat supply devices in consideration of operational and capital recovery constraints," Applied Energy, Elsevier, vol. 163(C), pages 118-133.
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    13. De Boeck, L. & Verbeke, S. & Audenaert, A. & De Mesmaeker, L., 2015. "Improving the energy performance of residential buildings: A literature review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 960-975.
    14. Wakui, Tetsuya & Kinoshita, Takahiro & Yokoyama, Ryohei, 2014. "A mixed-integer linear programming approach for cogeneration-based residential energy supply networks with power and heat interchanges," Energy, Elsevier, vol. 68(C), pages 29-46.
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