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Exergy analysis on combustion and energy conversion processes

Author

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  • Taniguchi, Hiroshi
  • Mouri, Kunihiko
  • Nakahara, Takefumi
  • Arai, Norio

Abstract

When we consider exergy analysis on combustion and thermodynamic processes, we introduce another concept against energy analysis, which is supported by an evaluation of its temperature level. When a higher temperature energy than that an ambient level is taken into consideration, it can be put for some domestic or industrial purpose. A medium temperature energy of 30–60 °C is used for domestic heating, and a high temperature of 200 °C and above is suitable for power generation or process heating. Therefore, we study exergy concept supported by temperature level. When we discuss power generation, a high temperature energy of 1500 °C and above in combined cycle has a higher conversion efficiency than that of 500–600 °C in steam cycle. If we try to apply high temperature air combustion, a preheated air temperature of 1000 °C and above can be produced by exhaust heat recovery from stack gas, which has been developed as a new technology of energy conservation. In this study, the authors present an exergy analysis on combustion and energy conversion processes, which is based on the above-mentioned concept of exergy and energy supported by temperature level. When we discuss high temperature air combustion in furnace, this process shows a higher performance than that of the ambient air combustion. Furthermore, when we discuss the power generation and heat pump processes, the minimum ambient temperature would already be known for each season, and the conversion performance can be estimated by the maximum operating temperature in their cycles. So, the authors attempt to calculate the exergy and energy values for combustion, power generation and heat pump processes.

Suggested Citation

  • Taniguchi, Hiroshi & Mouri, Kunihiko & Nakahara, Takefumi & Arai, Norio, 2005. "Exergy analysis on combustion and energy conversion processes," Energy, Elsevier, vol. 30(2), pages 111-117.
    • Handle: RePEc:eee:energy:v:30:y:2005:i:2:p:111-117
    DOI: 10.1016/j.energy.2004.04.014
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    Citations

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    Cited by:

    1. Zhao, Hongbin & Yue, Pengxiu, 2011. "Performance analysis of humid air turbine cycle with solar energy for methanol decomposition," Energy, Elsevier, vol. 36(5), pages 2372-2380.
    2. Coskun, C. & Oktay, Z. & Ilten, N., 2009. "A new approach for simplifying the calculation of flue gas specific heat and specific exergy value depending on fuel composition," Energy, Elsevier, vol. 34(11), pages 1898-1902.
    3. Ohara, B.Y. & Lee, H., 2015. "Exergetic analysis of a solar thermoelectric generator," Energy, Elsevier, vol. 91(C), pages 84-90.
    4. Chen, Wen-Lih & Currao, Gaetano & Li, Yueh-Heng & Kao, Chien-Chun, 2023. "Employing Taguchi method to optimize the performance of a microscale combined heat and power system with Stirling engine and thermophotovoltaic array," Energy, Elsevier, vol. 270(C).
    5. Francis Chinweuba Eboh & Peter Ahlström & Tobias Richards, 2017. "Exergy Analysis of Solid Fuel-Fired Heat and Power Plants: A Review," Energies, MDPI, vol. 10(2), pages 1-29, February.
    6. Feyz, M.E. & Pishbin, S.I. & Ghazikhani, M. & Modarres Razavi, S.M.R., 2015. "Parametric assessment of a low-swirl burner using the exergy analysis," Energy, Elsevier, vol. 79(C), pages 117-126.
    7. Attonaty, Kevin & Stouffs, Pascal & Pouvreau, Jérôme & Oriol, Jean & Deydier, Alexandre, 2019. "Thermodynamic analysis of a 200 MWh electricity storage system based on high temperature thermal energy storage," Energy, Elsevier, vol. 172(C), pages 1132-1143.
    8. Toghyani, Mahboubeh & Rahimi, Amir, 2015. "Exergy analysis of an industrial unit of catalyst regeneration based on the results of modeling and simulation," Energy, Elsevier, vol. 91(C), pages 1049-1056.

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