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Experimental study on the ignition time of electric heaters with thermal insulation structure

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  • Li, Pengliang
  • Liu, Zhenyi
  • Li, Mingzhi
  • Zhao, Yao
  • Li, Xuan
  • Sun, Ruiyan

Abstract

Ignition is one of the most important techniques used to ignite crude oil during the in-situ combustion process. However, one problem with this process is that the ignition time is long. To address this problem, this study provides a solution by using a thermal insulation structure consisting of three layers placed inside an electric heater. To investigate the performance of the thermal insulation structure, combustion tube experiments were conducted over a range of air injection rates of 1 L/min to 5 L/min at ambient pressure. The experimental results demonstrated that the average diminution of heat loss is about 52.68% and the time required to ignite the oil reservoir was shortened by approximately 20 min. Therefore, the ignition energy was saved by using the thermal insulation structure. Furthermore, the ignition effect was also strongly influenced by the air injection rate. The maximum temperature increase and front combustion propagation speed increased with the increase of the air injection rate. In this study, the better air injection rate was 3 L/min. Under this condition, not only can the best ignition effect be guaranteed but also stable propagation of the combustion front can be ensured.

Suggested Citation

  • Li, Pengliang & Liu, Zhenyi & Li, Mingzhi & Zhao, Yao & Li, Xuan & Sun, Ruiyan, 2018. "Experimental study on the ignition time of electric heaters with thermal insulation structure," Energy, Elsevier, vol. 160(C), pages 855-862.
    • Handle: RePEc:eee:energy:v:160:y:2018:i:c:p:855-862
    DOI: 10.1016/j.energy.2018.07.082
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    References listed on IDEAS

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    1. Kapadia, Punitkumar R. & Wang, Jingyi (Jacky) & Kallos, Michael S. & Gates, Ian D., 2013. "Practical process design for in situ gasification of bitumen," Applied Energy, Elsevier, vol. 107(C), pages 281-296.
    2. Gu, Hao & Cheng, Linsong & Huang, Shijun & Du, Baojian & Hu, Changhao, 2014. "Prediction of thermophysical properties of saturated steam and wellbore heat losses in concentric dual-tubing steam injection wells," Energy, Elsevier, vol. 75(C), pages 419-429.
    3. Zhang, Xian & Che, Hongchang, 2013. "Reducing heat loss of fluids in heavy oil wellbore using two-phase closed thermosyphon sucker rod," Energy, Elsevier, vol. 57(C), pages 352-358.
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    Cited by:

    1. Li, Pengliang & Liu, Zhenyi & Li, Mingzhi & Zhao, Yao & Li, Xuan & Wan, Song & Ma, Yuanyuan & He, Yanghua, 2021. "Investigation on the limiting oxygen concentration of combustible gas at high pressures and temperatures during oil recovery process," Energy, Elsevier, vol. 215(PB).
    2. Wang, Jikang & Li, Yan & Yuan, Han & Zhang, Zhixiang & Ding, Zhuang & Mei, Ning, 2020. "The energy-saving study of water heater based on source-sink matching principle," Energy, Elsevier, vol. 205(C).
    3. Li, Pengliang & Liu, Zhenyi & Li, Mingzhi & Zhao, Yao & Li, Xuan & Wan, Song & Ma, Yuanyuan & He, Yanghua, 2020. "Investigation on the low temperature oxidation of light oil for safely enhancing oil recovery at high temperatures and pressures," Energy, Elsevier, vol. 200(C).

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