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Supercritical carbon dioxide cycles with multi-heating in Concentrating Solar Power plants

机译：具有多加热浓缩太阳能发电厂的超临界二氧化碳循环

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摘要

This work analyses the features and performance of supercritical CO2 cycles with multi-heating (heat supplies at different temperature) in Concentrating Solar Power plants, including its internal coherent integration. The specific features of multi-heating cycles fit perfectly with the characteristics of concentrating solar energy. The integration requires the design of a new type of solar field to accommodate the solar radiation hitting the receiver to the multi-heating requirements. This new solar field has a similar configuration to the solar tower, but receiver and heliostats are divided into two sections, and each section meets different requirements in concentration ratio, fluid temperature, and absorbed heat flux. This new solar field, called multi-heating solar tower, achieves higher efficiencies than standard solar towers with softer thermal requirements. The flexibility of the multi-heating structure is very useful to solve efficiently the restrictions of supercritical CO2 cycles caused by the variations of specific heat close to the critical point. The resulting CSP plant with multi-heating achieves higher efficiency than plants with standard solar towers and supercritical CO2 cycle.
机译：这项工作分析了超临界CO2周期的特点和性能，在集中太阳能发电厂中的多加热（不同温度在不同温度下），包括其内部连贯整合。多加热循环的具体特征与集中太阳能的特点完美地配合。整合需要设计一种新型的太阳能场，以适应击中接收器的太阳辐射到多加热要求。这个新的太阳能领域具有与太阳能塔相似的配置，但接收器和光晕目录分为两个部分，每个部分都符合浓度比，流体温度和吸收热通量的不同要求。这种新的太阳能领域称为多加热太阳能塔，比标准太阳能塔具有更高的热量要求，实现更高的效率。多加热结构的灵活性非常有用，可以有效地解决超临界CO2循环的限制，这是由临界点接近临界点的特定热量的变化引起的。由多加热的CSP工厂比具有标准太阳能塔和超临界CO2循环的植物达到更高的效率。

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