Difference Between Electrode Electric Heating and Traditional Heating and Its Application Prospect in Carbon Neutrality

doi:10.12096/j.2096-4528.pgt.21069

Abstract

Abstract:

To help achieve carbon peaking and carbon neutrality, the new energy power generation plays an important role in the low-carbon transition of energy system and will gradually become the main power source. However, due to the inherent volatility of new energy power generation, the difficulty of new energy consumption has become a bottleneck problem. As a valuable flexible resource on the load side, the electrode electric heating has a good support for new energy consumption. Firstly, combined with the performance and structural characteristics of electric heating, the working principles of the existing electric heating technologies were studied. Then, the differences of conversion efficiency, ramp rate, and safety between the electrode electric heating and solid-state electric heating and traditional heating methods were analyzed. Finally, in view of the advantages of stepless regulation and fast response speed of electrode electric heating, the application prospects of electrode electric heating in peak-cutting and valley-filling of power grid, liberation of thermal power units in heating period, and participation in auxiliary service of frequency regulation were discussed.

Key words: carbon neutrality, new energy power generation, electric heating, stepless regulation, peak-cutting and valley-filling, frequency modulation

CLC Number:

TK01
TM732

Jingyi TANG, Shuai CHU, Weichun GE, Yinxuan LI, Chuang LIU. Difference Between Electrode Electric Heating and Traditional Heating and Its Application Prospect in Carbon Neutrality[J]. Power Generation Technology, 2021, 42(5): 525-536.

Figures/Tables 11

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项目	电极式电制热	固态电制热	燃油制热	燃煤制热	燃气制热
热转换效率	99%以上	98%	90%	60%以上	90%
设备成本	前期投资费用相对适中；后期运行维护费用相对适中	前期投资费用较低；后期运行维护费用相对适中	前期投资费用高；后期运行维护费用高	前期投资费用低；后期运行维护费用低	前期投资费用较低；后期运行维护费用低
占地面积	小	小	较大	大	较小
工艺复杂程度	工艺要求高，需要专业人员操作	常规操作要求，一般人员可进行作业	操作过程较繁杂；维护工作繁杂	常规操作要求，一般人员可进行作业	常规操作要求，一般人员可进行作业
调节性能	负荷调节范围在0%~100%，低负荷运行性能较好，能够实现无级调节	分级调节	负荷调节范围在20%~100%，低负荷运行性能较差	低负荷运行性能差	负荷调节能力一般
爬坡速率	冷备用启动时间小于1 h；热备用启动时间小于10 min	爬坡速度较快	冷态启动时，达到满负荷时间大于3 h；热态启动时，达满负荷需要30 min	惯性大，负荷响应慢	爬坡速率较快
安全程度	浸没电极式电制热安全程度高；喷射电极式电锅炉安全程度较低，有氢爆危险	安全程度较高	安全程度低，易发生爆炸危险	安全程度相对适中	安全程度低，易发生爆炸危险

项目	电极式电制热	固态电制热	燃油制热	燃煤制热	燃气制热
热转换效率	99%以上	98%	90%	60%以上	90%
设备成本	前期投资费用相对适中；后期运行维护费用相对适中	前期投资费用较低；后期运行维护费用相对适中	前期投资费用高；后期运行维护费用高	前期投资费用低；后期运行维护费用低	前期投资费用较低；后期运行维护费用低
占地面积	小	小	较大	大	较小
工艺复杂程度	工艺要求高，需要专业人员操作	常规操作要求，一般人员可进行作业	操作过程较繁杂；维护工作繁杂	常规操作要求，一般人员可进行作业	常规操作要求，一般人员可进行作业
调节性能	负荷调节范围在0%~100%，低负荷运行性能较好，能够实现无级调节	分级调节	负荷调节范围在20%~100%，低负荷运行性能较差	低负荷运行性能差	负荷调节能力一般
爬坡速率	冷备用启动时间小于1 h；热备用启动时间小于10 min	爬坡速度较快	冷态启动时，达到满负荷时间大于3 h；热态启动时，达满负荷需要30 min	惯性大，负荷响应慢	爬坡速率较快
安全程度	浸没电极式电制热安全程度高；喷射电极式电锅炉安全程度较低，有氢爆危险	安全程度较高	安全程度低，易发生爆炸危险	安全程度相对适中	安全程度低，易发生爆炸危险

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