Optimal Design of a Molten Salt Thermal Storage Tank for Parabolic Trough Solar Power Plants

被引：73
作者：
Gabbrielli, R. [1 ]
Zamparelli, C. [2 ]
机构：
[1] Univ Pisa, Dipartimento Energet, I-56126 Pisa, Italy
[2] ENEL GEM, Area Tecn Ric, I-56100 Pisa, Italy
来源：
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2009年 / 131卷 / 04期
关键词：
carbon steel; solar power stations; DIRECT STEAM-GENERATION; ENERGY STORAGE; SYSTEMS;
D O I：
10.1115/1.3197585
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
This paper presents an optimal design procedure for internally insulated, carbon steel, molten salt thermal storage tanks for parabolic trough solar power plants. The exact size of the vessel and insulation layers and the shape of the roof are optimized by minimizing the total investment cost of the storage system under three technical constraints: remaining within the maximum allowable values of both temperature and stress in the steel structure, and avoiding excessive cooling and consequent solidification of the molten salt during long periods of no solar input. The thermal, mechanical and economic aspects have been integrated into an iterative step-by-step optimization procedure, which is shown to be effective through application to the case study of a 600 MW h thermal storage system. The optimal design turns out to be an internally insulated, carbon steel storage tank characterized by a maximum allowable height of 11 m and a diameter of 22.4 m. The total investment cost is about 20% lower than that of a corresponding AISI 321H stainless steel storage tank without internal protection or insulation.
引用
收藏
页码：0410011 / 04100110
页数：10
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