Performance characteristics and operation strategy optimization of molten salt receiver for concentrating solar power

被引：0
|
作者：
Xu Y. [1 ]
Zeng J. [1 ]
Chen D. [1 ]
Xiao G. [1 ]
机构：
[1] State Key Laboratory of Clean Energy Utilization of Zhejiang University, Hangzhou
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2022年 / 43卷 / 02期
关键词：
Efficiency analysis; Heat loss; Molten salt receiver; Numerical simulation; Operation strategy; Solar power tower;
D O I：
10.19912/j.0254-0096.tynxb.2020-0382
中图分类号：
学科分类号：
摘要：
This article studies the influence of environmental conditions on overall thermal efficiency and heat loss of molten salt receiver for Concentrating Solar Power, including concentrated incident energy, ambient temperature, wind velocity and wind direction. Operation strategy of the receiver and its influence on system energy efficiency are discussed. The operation performance of the receiver is mainly affected by wind velocity and concentrated incident energy. Wind direction and ambient temperature, however, do not have significant influence on it. If wind velocity is over 7 m/s, the overall convective heat loss under rated outlet temperature mode surpasses the radiative heat loss. The local convective heat loss of the receiver is greatly influenced by wind velocity, while the local radiative heat loss is almost independent of it. When operated under rated outlet temperature mode, thermal efficiency of the receiver is lower. However, its exergy efficiency and the overall energy efficiency of the whole system are higher than that of rated mass flow rate mode. Compared to rated mass flow rate mode, it is recommended to adopt rated outlet temperature mode when direct normal irradiance(DNI) remains stable. In such case, the enhancement of overall system energy efficiency will be up to 2% if concentrated incident energy reaches 80% and above of the designed value. And the enhancement increases from 2% to 9% when concentrated incident energy decreases from 80% to 30% of the designed value. It is noted that an equivalent rated outlet temperature mode can be adopted when (DNI) fluctuates violently. © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：329 / 337
页数：8
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