当前位置: X-MOL 学术Appl. Therm. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A strategy to flexibly operate a solar aided power generation plant for wide irradiation conditions
Applied Thermal Engineering ( IF 6.1 ) Pub Date : 2022-05-17 , DOI: 10.1016/j.applthermaleng.2022.118659
Jiyun Qin , Qinglei Zhang , Zhen Liu , Eric Hu , Hongsheng Zhang

Solar Aided Power Generation is a solar thermal hybrid power system, in which solar heat is used to replace the heat of extraction steam for a Rankine cycle power plant by preheating the power plant feedwater to boiler. In this power system, low to high temperature solar heat can flexibly replace extraction steam at different stages, the most common replacement strategy is medium to high temperature solar heat used to replace extraction steam to all high-pressure stages. However, this solar replacement strategy faces a problem of inefficient utilisation of non-ideal solar irradiation, which limits the annual solar contribution of the hybrid power system. In the present study, a novel solar replacement strategy, which can efficiently use wide range solar irradiation, is proposed. In this strategy, the extraction steam replacement stages can be flexibly selected depending on the solar radiation condition. In this study, the performance of a power system for the novel strategy and most common replacement strategy (i.e., solar heat used to replace extraction steam to all high-pressure stages) have been compared based on a hybrid power system modified from 300 MW power plant. The results indicate that the solar contribution of the power system operated with novel strategy can be improved by 6.6% and 11.9% for typical winter and summer days, respectively. Also, by using the novel strategy, the annual solar contribution and annual solar operation hours can be improved by 6.7% and 1488 h.



中文翻译:

在宽辐照条件下灵活运行太阳能辅助发电厂的策略

太阳能辅助发电是一种太阳能热混合发电系统,其中太阳能热用于通过预热发电厂给水到锅炉来代替朗肯循环发电厂的抽汽热。在该电力系统中,低温到高温太阳热能在不同阶段灵活替代抽汽,最常见的替代策略是中高温太阳热替代抽汽到所有高压级。然而,这种太阳能替代策略面临着非理想太阳辐射利用效率低下的问题,这限制了混合电力系统的年度太阳能贡献。在本研究中,提出了一种新的太阳能替代策略,可以有效地利用大范围的太阳辐射。在这个策略中,抽汽置换阶段可根据太阳辐射情况灵活选择。在这项研究中,基于从 300 MW 功率修改的混合动力系统,比较了新策略和最常见替代策略(即,用于将提取蒸汽替换到所有高压阶段的太阳能热)的电力系统的性能植物。结果表明,在典型的冬季和夏季,采用新策略运行的电力系统的太阳能贡献可分别提高 6.6% 和 11.9%。此外,通过使用新策略,年太阳能贡献和年太阳能运行小时可提高 6.7% 和 1488 小时。基于从 300 MW 发电厂改造而来的混合动力系统,比较了新策略和最常见替代策略(即,用于将提取蒸汽替换到所有高压阶段的太阳能热)的电力系统的性能。结果表明,在典型的冬季和夏季,采用新策略运行的电力系统的太阳能贡献可分别提高 6.6% 和 11.9%。此外,通过使用新策略,年太阳能贡献和年太阳能运行小时可提高 6.7% 和 1488 小时。基于从 300 MW 发电厂改造而来的混合动力系统,比较了新策略和最常见替代策略(即,用于将提取蒸汽替换到所有高压阶段的太阳能热)的电力系统的性能。结果表明,在典型的冬季和夏季,采用新策略运行的电力系统的太阳能贡献可分别提高 6.6% 和 11.9%。此外,通过使用新策略,年太阳能贡献和年太阳能运行小时可提高 6.7% 和 1488 小时。结果表明,在典型的冬季和夏季,采用新策略运行的电力系统的太阳能贡献可分别提高 6.6% 和 11.9%。此外,通过使用新策略,年太阳能贡献和年太阳能运行小时可提高 6.7% 和 1488 小时。结果表明,在典型的冬季和夏季,采用新策略运行的电力系统的太阳能贡献可分别提高 6.6% 和 11.9%。此外,通过使用新策略,年太阳能贡献和年太阳能运行小时可提高 6.7% 和 1488 小时。

更新日期:2022-05-22
down
wechat
bug