Techno-economic heat transfer optimization of large scale latent heat energy storage systems in solar thermal power plants

被引：43

作者：

Huebner, Stefan ^{[1
]}

Eck, Markus ^{[2
]}

Stiller, Christoph ^{[1
]}

Seitz, Markus ^{[3
]}

机构：

[1] Linde AG, Seitnerstr 70, D-82049 Pullach, Germany

[2] Univ Appl Sci, Albrechtstr 30, D-49076 Osnabruck, Germany

[3] German Aerosp Ctr DLR, Inst Engn Thermodynam, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 98卷

关键词：

Latent heat storage; Phase change material; Heat transfer enhancement; Direct steam generation; DIRECT STEAM-GENERATION; PHASE-CHANGE-MATERIAL;

D O I：

10.1016/j.applthermaleng.2015.11.026

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Concentrated solar power plants with integrated storage systems are key technologies for sustainable energy supply systems and reduced anthropogenic CO2-emissions. Developing technologies include direct steam generation in parabolic trough systems, which offer benefits due to higher steam temperatures and, thus, higher electrical efficiencies. However, no large scale energy storage technology is available yet. A promising option is a combined system consisting of a state-of-the art sensible molten salt storage system and a high temperature latent heat thermal energy storage system (LHTESS). This paper discusses the systematic development and optimization of heat transfer structures in LHTESS from a technological and economic point of view. Two evaluation parameters are developed in order to minimize the specific investment costs. First, the specific product costs determine the optimum equipment of the latent heat storage module, i.e. the finned tube. The second parameter reflects the interacting behavior of the LHTESS and the steam turbine during discharge. This behavior is described with a simplified power block model that couples both components. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：483 / 491

页数：9

共 19 条

[1] Thermal conductivity of high-temperature multicomponent materials with phase change [J].