储能科学与技术 ›› 2017, Vol. 6 ›› Issue (2): 275-279.doi: 10.12028/j.issn.2095-4239.2016.0067

• 研究开发 • 上一篇    下一篇

光伏、光热联合SOC制氢、发电系统设计

吕泽伟，韩敏芳   

  1. 清华大学热能工程系，电力系统国家重点实验室，北京 100084
  • 收稿日期:2016-09-05 修回日期:2016-12-09 出版日期:2017-03-01 发布日期:2017-03-01
  • 通讯作者: 韩敏芳，教授，主要研究方向为固体氧化物燃料电池、煤气制氢、新材料开发和固体废弃物综合利用，E-mail：hanminfang@sina.com。
  • 作者简介:吕泽伟（1996—），男，本科生，研究方向为固体氧化物燃料电池，E-mail：lvzw13@mails.tsinghua.edu.cn
  • 基金资助:
    科技北京百名领军人才培养工程（Z151100000315031），电力系统国家重点实验室（SKLD16Z11）

Design of solar cogeneration system of hydrogen and power with solid oxide cells#br#

LV Zewei, HAN Minfang   

  1. Department of Thermal Engineering, Tsinghua University, State Key Lab of Power Systems, Beijing 100084, China
  • Received:2016-09-05 Revised:2016-12-09 Online:2017-03-01 Published:2017-03-01

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摘要： 为了解决光伏发电和光热发电共同面临的储能困难问题，构建了一种结合光热制汽、光伏发电、固体氧化物电解池（SOEC）电解水制氢以及固体氧化物燃料电池（SOFC）发电互补的可持续发电系统，并进行了系统参数以及能效优化平衡计算。结果表明，以日光照5 h为基础时，1 MW发电量的发电系统由8.407 MW的光伏系统、加热功率6.756 MW的光热系统、制氢速率0.0698 kg/s的SOEC系统以及1 MW的SOFC发电系统构成。系统全天发电效率可以达到9.4%，考虑到假设条件比较严苛，能够说明系统整体具有可行性。此外，系统的产出还包括制取的纯氧，可以作为副产品加以存储利用。该系统利用光热系统产生的高温蒸汽进行高温电解，能够有效降低电能消耗，从而提高储能效率。这种抽取部分过剩电力电解高温蒸汽的储能方式也可以应用到其它可再生能源发电系统当中，在高效储能的同时起到削峰填谷的作用。

关键词: 光伏发电, 光热发电, 固体氧化物燃料电池, 固体氧化物电解池, 太阳能制氢

Abstract: A novel cogeneration system of hydrogen and power is designed to solve the energy storage problem faced by both photovoltaic and solar thermal generation technologies. In this system, solar energy collection, photovoltaic generation, solid oxide electrolysis cell (SOEC) and solid oxide fuel cell (SOFC) are synergistically combined. A simplification of solar insolation curve was made before thermodynamic calculation. Based on the simplification, it shows that 1 MW system consists of 8.407 MW photovoltaic system, solar thermal collector with heating power of 6.756 MW, SOEC system with hydrogen produce rate of 0.0698 kg/s and 1 MW SOFC system. Power generating efficiency can reach 9.4% throughout the day, which partly demonstrates the feasibility of the system. In addition, oxygen can be produced in the system, which can be further utilized. Moreover, high temperature steam electrolysis which significantly reduces the electric energy consumption, provides a potential pathway for the interconversion of electricity and hydrogen. This method can be used to stockpile the electrical energy harvested from fluctuant renewable energy sources.

Key words: photovoltaic generation, solar thermal generation, solid oxide fuel cell, solid oxide electrolysis cell, solar hydrogen production