Solar hybrid steam injection gas turbine (STIG) cycle
Solar hybrid steam injection gas turbine (STIG) cycle
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DOI：
10.1016/j.solener.2011.09.020
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发表时间：
2012
期刊：
影响因子：
6.7
通讯作者：
M. Livshits;A. Kribus
中科院分区：
文献类型：
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作者：
M. Livshits;A. Kribus
200°C 左右的中等温度的太阳能热可用于增强传统的蒸汽喷射燃气轮机发电厂。用于这种应用的太阳能聚光收集器可以比用于当前太阳能发电厂的收集器更简单并且更便宜。我们对该混合循环进行了热力学分析。研究了高水平的蒸汽空气比，与简单循环和传统 STIG 相比，可实现高功率增强。在最高增强级别下，太阳能分数最高可达 50%。对于典型的候选涡轮机来说，从热到电的整体转换效率（燃料和太阳能贡献的平均值）可以在 40-55% 的范围内。增量效率（相当于超出传统 STIG 增加的蒸汽）在 22-37% 范围内，相当于约 15-24% 的太阳能发电效率，类似于甚至超过目前使用更高温度集热器的太阳能发电厂。注入的水可以回收和再循环，从而导致循环的耗水量非常低，但需要非常低成本的冷凝器才能使水回收可行。
Solar heat at moderate temperatures around 200°C can be utilized for augmentation of conventional steam-injection gas turbine power plants. Solar concentrating collectors for such an application can be simpler and less expensive than collectors used for current solar power plants. We perform a thermodynamic analysis of this hybrid cycle. High levels of steam-to-air ratio are investigated, leading to high power augmentation compared to the simple cycle and to conventional STIG. The Solar Fraction can reach up to 50% at the highest augmentation levels. The overall conversion efficiency from heat to electricity (average over fuel and solar contributions) can be in the range of 40–55% for typical candidate turbines. The incremental efficiency (corresponding to the added steam beyond conventional STIG) is in the range of 22–37%, corresponding to solar-to-electricity efficiency of about 15–24%, similar to and even exceeding current solar power plants using higher temperature collectors. The injected water can be recovered and recycled leading to very low water consumption of the cycle, but a very low cost condenser is required to make water recovery feasible.