Designing of parabolic troughs type EuroTrough in full-scale as a concrete construction for solar power plants

到目前为止，抛物面槽是太阳能热电厂经济上最成功的技术。到目前为止，它们主要以钢结构生产。在DFG-SPP 1542“轻量混凝土结构”项目中，申请人共同完成了以太阳能热电厂抛物面槽为例，由微增强UHPC制成的轻量变形优化壳结构。在该项目中，确定了具体的冲击和载荷，为壳体内表面的精度分析奠定了基础，建立了参数化的数值模拟模型，并进行了多级寻形优化。此外，还研究了壳体稳定性和风致振动。此外，确定了合适的混凝土技术，验证了硬化过程中的变形行为，并设计和制造了一个模型（地面面积3.2 x 2.2 m）。尤其是因为这个示范项目受到了太阳能发电厂生产商的高度关注，他们看到了混凝土解决方案在刚度、生产速度和成本方面相对于现有钢结构解决方案的巨大优势。现在有两个重点领域：将基本概念扩展到像巨型结构一样的桥梁（地面面积30 x 10米）：抛物线槽发电厂的有远见的生产商遵循超大尺寸收集器的解决方案。为了能够通过应用预应力技术有效地利用混凝土的材料特性，对于这些尺寸，采用空心外壳和不同支撑结构的全新设计概念将成为强制性的。从发电厂技术的角度来看，如此大型的结构带来了许多悬而未决的问题，因此这样的项目还需要很长的时间。为了回答与此相关的有关混凝土结构的问题，两个申请人在spp1542的第二个资助期一起申请了一个后续项目。2)。将大壳概念转移到目前常见的收集器尺寸。目前在西班牙建造的两座性能为50兆瓦的ANDASOL型设施代表了电厂技术的现状。在那里使用的收集器（euro槽型）尺寸为12,000 x 5,77 m。对于这种类型，从第一个资助期开始，大量的外壳可以经济地实现，目前制造商的需求很高。在这个应用于知识转移的项目中，可以实现将该类型的设计（支撑结构、形状优化、振荡灵敏度、加固技术、粘合技术）作为批量产品的开放性问题的解答以及全尺寸模型的制造。该项目可以完全独立于spp后续项目（第二期资助期）的批准而进行。

So far, parabolic troughs are the economically most successful technology for solar thermal power plants. Up to now they are produced predominantly as steel structures. In DFG-SPP 1542 'Lightweight Concrete Structures' the applicants worked together on the project Lightweight deformation optimized shell structures made of micro-reinforced UHPC at the example of parabolic troughs for solar thermal power plants. During this project specific impacts and loads were determined, the foundation for an accuracy analysis of the inner face of the shell was generated, parametric, numerical simulation models were developed and a multilevel-optimization for form finding was carried out. Additionally, the shell stability and wind induced oscillations were investigated. Furthermore, a suitable concrete technology was identified, the deformation behavior during the hardening process was validated and a mockup (ground area 3,2 x 2,2 m) was designed and manufactured. Not least because of this demonstrator the project was paid high attention to by producers of solar power plants, who see big advantages of a concrete solution towards the existing steel structure solutions concerning stiffness, production speed and costs. Now two focus areas result: 1.) Extension of the basic concept to bridge like mega structures (ground area 30 x 10 m): Visionary producers of parabolic trough power plants follow solutions with very large dimensions of the collectors. To be able to use the material-specific properties of concrete efficiently for this by applying prestressing techniques, for these dimensions a completely new designing concept with hollow shells and a different supporting structure will become mandatory. From the point of view of the power plant technique such large structures bring up numerous unanswered questions, therefore such a project reaches far into the future. To answer the questions being connected to this concerning the concrete construction the two applicants applied for a follow-up project in the 2nd funding period of the SPP 1542 together. 2.) Transfer of the massive shell concept to up to now common collector dimensions. Current state of the power plant technique is represented by two facilities of the type ANDASOL with a performance of 50 MW, which are currently built in Spain. The collectors (Type EuroTrough) being used there have the dimensions 12,00 x 5,77 m. For this type, which can be realized economically with the massive shells from the 1st funding period, currently a high demand by the manufacturers exists. The answering of open questions for the design of this type (supporting structure, form optimization, oscillation sensitivity, reinforcement technique, adhesive technology) as a mass product as well as the manufacturing of a full-scale mockup could be realized in this applied for knowledge transfer project. This project can be processed completely independently from the granting of the SPP-follow-up project (2nd funding period).