IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v11y2018i9p2487-d170711.html
   My bibliography  Save this article

Modified High Back-Pressure Heating System Integrated with Raw Coal Pre-Drying in Combined Heat and Power Unit

Author

Listed:
  • Heng Chen

    (National Thermal Power Engineering and Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Zhen Qi

    (National Thermal Power Engineering and Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Qiao Chen

    (National Thermal Power Engineering and Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Yunyun Wu

    (National Thermal Power Engineering and Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Gang Xu

    (National Thermal Power Engineering and Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Yongping Yang

    (National Thermal Power Engineering and Technology Research Center, North China Electric Power University, Beijing 102206, China)

Abstract

A conceptual high-back pressure (HBP) heating system cooperating raw coal pre-drying for combined heat and power (CHP) was proposed to improve the performance of the HBP-CHP unit. In the new design, besides of heating the supply-water of the heating network, a portion of the exhaust steam from the turbine is employed to desiccate the raw coal prior to the coal pulverizer, which further recovers the waste heat of the exhaust steam and contributes to raising the overall efficiency of the unit. Thermodynamic and economic analyzes were conducted based on a typical 300 MW coal-fired HBP-CHP unit with the application of the modified configuration. The results showed that the power generation thermal efficiency promotion of the unit reaches 1.7% (absolute value) owing to suggested retrofitting, and meanwhile, the power generation standard coal consumption rate is diminished by 5.8 g/kWh. Due to the raw coal pre-drying, the energy loss of the exhaust flue gas of the boiler is reduced by 19.1% and the boiler efficiency increases from 92.7% to 95.4%. The impacts of the water content of the dried coal and the unit heating capacity on the energy-saving effect of the new concept were also examined.

Suggested Citation

  • Heng Chen & Zhen Qi & Qiao Chen & Yunyun Wu & Gang Xu & Yongping Yang, 2018. "Modified High Back-Pressure Heating System Integrated with Raw Coal Pre-Drying in Combined Heat and Power Unit," Energies, MDPI, vol. 11(9), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2487-:d:170711
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/11/9/2487/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/11/9/2487/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Liu, Mingxi & Shi, Yang & Fang, Fang, 2014. "Combined cooling, heating and power systems: A survey," Renewable and Sustainable Energy Reviews, Elsevier, vol. 35(C), pages 1-22.
    2. Gustafsson, Jonas & Delsing, Jerker & van Deventer, Jan, 2010. "Improved district heating substation efficiency with a new control strategy," Applied Energy, Elsevier, vol. 87(6), pages 1996-2004, June.
    3. Kristo Helin & Behnam Zakeri & Sanna Syri, 2018. "Is District Heating Combined Heat and Power at Risk in the Nordic Area?—An Electricity Market Perspective," Energies, MDPI, vol. 11(5), pages 1-19, May.
    4. Sun, Fangtian & Zhao, Jinzi & Fu, Lin & Sun, Jian & Zhang, Shigang, 2017. "New district heating system based on natural gas-fired boilers with absorption heat exchangers," Energy, Elsevier, vol. 138(C), pages 405-418.
    5. Li, Yan & Chang, Shanshan & Fu, Lin & Zhang, Shuyan, 2016. "A technology review on recovering waste heat from the condensers of large turbine units in China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 287-296.
    6. Khuram Pervez Amber & Tony Day & Naeem Iqbal Ratyal & Adnan Khalid Kiani & Rizwan Ahmad, 2018. "Techno, Economic and Environmental Assessment of a Combined Heat and Power (CHP) System—A Case Study for a University Campus," Energies, MDPI, vol. 11(5), pages 1-18, May.
    7. Xu, Cheng & Bai, Pu & Xin, Tuantuan & Hu, Yue & Xu, Gang & Yang, Yongping, 2017. "A novel solar energy integrated low-rank coal fired power generation using coal pre-drying and an absorption heat pump," Applied Energy, Elsevier, vol. 200(C), pages 170-179.
    8. Gadd, Henrik & Werner, Sven, 2014. "Achieving low return temperatures from district heating substations," Applied Energy, Elsevier, vol. 136(C), pages 59-67.
    9. Gong, Mei & Werner, Sven, 2015. "An assessment of district heating research in China," Renewable Energy, Elsevier, vol. 84(C), pages 97-105.
    10. Heng Chen & Jidong Xu & Yao Xiao & Zhen Qi & Gang Xu & Yongping Yang, 2018. "An Improved Heating System with Waste Pressure Utilization in a Combined Heat and Power Unit," Energies, MDPI, vol. 11(6), pages 1-20, June.
    11. Zhihua Ge & Fuxiang Zhang & Shimeng Sun & Jie He & Xiaoze Du, 2018. "Energy Analysis of Cascade Heating with High Back-Pressure Large-Scale Steam Turbine," Energies, MDPI, vol. 11(1), pages 1-15, January.
    12. Ommen, Torben & Markussen, Wiebke Brix & Elmegaard, Brian, 2014. "Heat pumps in combined heat and power systems," Energy, Elsevier, vol. 76(C), pages 989-1000.
    13. Liu, Ming & Wu, Dongyin & Xiao, Feng & Yan, JunJie, 2015. "A novel lignite-fired power plant integrated with a vacuum dryer: System design and thermodynamic analysis," Energy, Elsevier, vol. 82(C), pages 968-975.
    14. Lake, Andrew & Rezaie, Behanz & Beyerlein, Steven, 2017. "Review of district heating and cooling systems for a sustainable future," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 417-425.
    15. Rezaie, Behnaz & Rosen, Marc A., 2012. "District heating and cooling: Review of technology and potential enhancements," Applied Energy, Elsevier, vol. 93(C), pages 2-10.
    16. Xu, Xin & You, Shijun & Zheng, Xuejing & Li, Han, 2014. "A survey of district heating systems in the heating regions of northern China," Energy, Elsevier, vol. 77(C), pages 909-925.
    17. Zhao, Shifei & Ge, Zhihua & He, Jie & Wang, Chunlan & Yang, Yongping & Li, Peifeng, 2017. "A novel mechanism for exhaust steam waste heat recovery in combined heat and power unit," Applied Energy, Elsevier, vol. 204(C), pages 596-606.
    18. Werner, Sven, 2017. "International review of district heating and cooling," Energy, Elsevier, vol. 137(C), pages 617-631.
    19. Kristian Madsen & Niclas Scott Bentsen, 2018. "Carbon Debt Payback Time for a Biomass Fired CHP Plant—A Case Study from Northern Europe," Energies, MDPI, vol. 11(4), pages 1-12, March.
    20. Laia Pié & Laura Fabregat-Aibar & Marc Saez, 2018. "The Influence of Imports and Exports on the Evolution of Greenhouse Gas Emissions: The Case for the European Union," Energies, MDPI, vol. 11(7), pages 1-14, June.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ming Yan & Xinnan Song & Jin Tian & Xuebin Lv & Ze Zhang & Xiaoyan Yu & Shuting Zhang, 2020. "Construction of a New Type of Coal Moisture Control Device Based on the Characteristic of Indirect Drying Process of Coking Coal," Energies, MDPI, vol. 13(16), pages 1-20, August.
    2. Xiaolong Yang & Yan Li & Dongxiao Niu & Lijie Sun, 2019. "Research on the Economic Benefit Evaluation of Combined Heat and Power (CHP) Technical Renovation Projects Based on the Improved Factor Analysis and Incremental Method in China," Sustainability, MDPI, vol. 11(19), pages 1-23, September.
    3. Tilia Dahou & Patrick Dutournié & Lionel Limousy & Simona Bennici & Nicolas Perea, 2019. "Recovery of Low-Grade Heat (Heat Waste) from a Cogeneration Unit for Woodchips Drying: Energy and Economic Analyses," Energies, MDPI, vol. 12(3), pages 1-17, February.
    4. Shifei Zhao & Weishu Wang & Zhihua Ge, 2020. "Energy and Exergy Evaluations of a Combined Heat and Power System with a High Back-Pressure Turbine under Full Operating Conditions," Energies, MDPI, vol. 13(17), pages 1-18, August.
    5. Halina Pawlak–Kruczek & Michał Czerep & Lukasz Niedzwiecki & Emmanouil Karampinis & Ioannis Violidakis & Ioannis Avagianos & Panagiotis Grammelis, 2019. "Drying of Lignite of Various Origins in a Pilot Scale Toroidal Fluidized Bed Dryer using Low Quality Heat," Energies, MDPI, vol. 12(7), pages 1-22, March.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Michael-Allan Millar & Bruce Elrick & Greg Jones & Zhibin Yu & Neil M. Burnside, 2020. "Roadblocks to Low Temperature District Heating," Energies, MDPI, vol. 13(22), pages 1-21, November.
    2. Golmohamadi, Hessam & Larsen, Kim Guldstrand & Jensen, Peter Gjøl & Hasrat, Imran Riaz, 2022. "Integration of flexibility potentials of district heating systems into electricity markets: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 159(C).
    3. Zhang, Youjun & Hao, Junhong & Ge, Zhihua & Zhang, Fuxiang & Du, Xiaoze, 2021. "Optimal clean heating mode of the integrated electricity and heat energy system considering the comprehensive energy-carbon price," Energy, Elsevier, vol. 231(C).
    4. Stefan Blomqvist & Shahnaz Amiri & Patrik Rohdin & Louise Ödlund, 2019. "Analyzing the Performance and Control of a Hydronic Pavement System in a District Heating Network," Energies, MDPI, vol. 12(11), pages 1-23, May.
    5. Li, Yu & Rezgui, Yacine & Zhu, Hanxing, 2017. "District heating and cooling optimization and enhancement – Towards integration of renewables, storage and smart grid," Renewable and Sustainable Energy Reviews, Elsevier, vol. 72(C), pages 281-294.
    6. Sun, Fangtian & Li, Junlong & Fu, Lin & Li, Yonghong & Wang, Ruixiang & Zhang, Shigang, 2020. "New configurations of district heating and cooling system based on absorption and compression chillers driven by waste heat of flue gas from coke ovens," Energy, Elsevier, vol. 193(C).
    7. Ma, Liqun & Ge, Zhihua & Zhang, Fuxiang & Wei, Huimin, 2020. "A novel super high back pressure cascade heating scheme with multiple large-scale turbine units," Energy, Elsevier, vol. 201(C).
    8. Beatriz María Paredes-Sánchez & José Pablo Paredes & Natalia Caparrini & Elena Rivo-López, 2021. "Analysis of District Heating and Cooling Energy Systems in Spain: Resources, Technology and Management," Sustainability, MDPI, vol. 13(10), pages 1-22, May.
    9. Persson, Urban & Wiechers, Eva & Möller, Bernd & Werner, Sven, 2019. "Heat Roadmap Europe: Heat distribution costs," Energy, Elsevier, vol. 176(C), pages 604-622.
    10. Valerie Eveloy & Dereje S. Ayou, 2019. "Sustainable District Cooling Systems: Status, Challenges, and Future Opportunities, with Emphasis on Cooling-Dominated Regions," Energies, MDPI, vol. 12(2), pages 1-64, January.
    11. Zhang, Youjun & Xiong, Nian & Ge, Zhihua & Zhang, Yichen & Hao, Junhong & Yang, Zhiping, 2020. "A novel cascade heating system for waste heat recovery in the combined heat and power plant integrating with the steam jet pump," Applied Energy, Elsevier, vol. 278(C).
    12. Badami, Marco & Fonti, Antonio & Carpignano, Andrea & Grosso, Daniele, 2018. "Design of district heating networks through an integrated thermo-fluid dynamics and reliability modelling approach," Energy, Elsevier, vol. 144(C), pages 826-838.
    13. Stefan Blomqvist & Lina La Fleur & Shahnaz Amiri & Patrik Rohdin & Louise Ödlund (former Trygg), 2019. "The Impact on System Performance When Renovating a Multifamily Building Stock in a District Heated Region," Sustainability, MDPI, vol. 11(8), pages 1-18, April.
    14. Kavvadias, Konstantinos C. & Quoilin, Sylvain, 2018. "Exploiting waste heat potential by long distance heat transmission: Design considerations and techno-economic assessment," Applied Energy, Elsevier, vol. 216(C), pages 452-465.
    15. Nord, Natasa & Shakerin, Mohammad & Tereshchenko, Tymofii & Verda, Vittorio & Borchiellini, Romano, 2021. "Data informed physical models for district heating grids with distributed heat sources to understand thermal and hydraulic aspects," Energy, Elsevier, vol. 222(C).
    16. Alessandro Guzzini & Marco Pellegrini & Edoardo Pelliconi & Cesare Saccani, 2020. "Low Temperature District Heating: An Expert Opinion Survey," Energies, MDPI, vol. 13(4), pages 1-34, February.
    17. Deng, Na & He, Guansong & Gao, Yuan & Yang, Bin & Zhao, Jun & He, Shunming & Tian, Xue, 2017. "Comparative analysis of optimal operation strategies for district heating and cooling system based on design and actual load," Applied Energy, Elsevier, vol. 205(C), pages 577-588.
    18. Werner, Sven, 2017. "International review of district heating and cooling," Energy, Elsevier, vol. 137(C), pages 617-631.
    19. Shifei Zhao & Weishu Wang & Zhihua Ge, 2020. "Energy and Exergy Evaluations of a Combined Heat and Power System with a High Back-Pressure Turbine under Full Operating Conditions," Energies, MDPI, vol. 13(17), pages 1-18, August.
    20. Ziemele, Jelena & Cilinskis, Einars & Blumberga, Dagnija, 2018. "Pathway and restriction in district heating systems development towards 4th generation district heating," Energy, Elsevier, vol. 152(C), pages 108-118.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2487-:d:170711. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.