华电技术 ›› 2017, Vol. 39 ›› Issue (4): 74-76.

• 新能源 • 上一篇    

塔式熔融盐太阳能热发电法向直射辐射设计点选择方法研究

  

  1. 中国电力工程顾问集团东北电力设计院有限公司,长春〓130021
  • 出版日期:2017-04-25 发布日期:2017-05-23

Study on the selection method of direct normal irradiance design points for tower molten salt solar thermal power generation

  1. Northeast China Power Engineering Company Limited of China Power Engineering Consulting Group Corporation, Changchun 130021, China
  • Online:2017-04-25 Published:2017-05-23

摘要:

根据塔式太阳能热发电技术特点,以50MW装机规模为计算模型,依据某地区太阳能资源条件,选取不同的直射辐射(DNI)作为设计点,与不同的太阳倍数(SM)和储热时间形成多个配置方案进行模拟,以相同的年发电设备利用小时数作为边界条件,筛选配置方案,以单位电价最低作为优化目标。从对比结果可以发现,不同的年发电量要求对应的不同配置方案,即使在相同地区,不同的年发电量对应的设计点也是不同的,设计点是确定SM为某一值时聚光场采光面积的一个必要条件,通过对聚光、吸热、储热和发电单元容量优化设计,最终确定聚光场采光面积。设计点的确定为聚光及储热系统设计中设备选型提供依据。

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Abstract:

According to the technical features of tower solar thermal power generation, taking the 50MW installation capacity as a computation model, and on the basis of solar energy resource conditions of a certain area, different direct normal irradiances (DNI) are chosen as the design points, and together with different solar multiples (SM) and thermal storage times, several allocation plans are formed. Taking the same annual utilization hours as boundary condition and taking the minimum unit price as optimization target, this paper simulated and filtered the allocation plans. The results shows that different annual power generating requirements need different allocation plans. Even in same area, different annual power generating capacities need different design points. The design points is a necessary condition to confirm the day lighting area at concentrated field under a certain SM, and through the optimization design of spotlight, heat absorption, heat storage and generating unit capacity, the day lighting area at concentrated field could be confirmed. At last, the confirmation of design point could provide a reference for the equipment selection in the design of spotlight and heat storage systems.

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