煤炭与太阳能互补发电系统四季典型日变辐照聚光集热性能研究  

Thermodynamic Performances on Typical Days of Solar Hybrid Coal-fired Power System

作　　者：彭烁[1] 周贤[1] 洪慧[2] 王保民[1] 史绍平[1] PENG Shuo ZHOU Xian HONG Hui WANG Baominl SHI Shaoping(State Key Laboratory of Coal-Based Clean Energy, Huaneng Clean Energy Research Institute, Changping District, Beijing 102209, China Institute of Engineering Thermophysics, Chinese Academy of Sciences, Haidian District, Beijing 100190, China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司煤基清洁能源国家重点实验室,北京市昌平区102209 [2]中国科学院工程热物理研究所,北京市海淀区100190

出　　处：《中国电机工程学报》2016年第24期6866-6873,共8页Proceedings of the CSEE

基　　金：中国华能集团公司科学技术项目(CERI/TS-15-HJK01)~~

摘　　要：光煤互补发电系统能将300℃以下的中低温太阳热能与传统燃煤电站相结合,用以替代回热抽汽加热给水,从而增加汽轮机出功。对传统的单轴跟踪槽式太阳能集热器用于光煤互补电站的热力性能进行了分析,并对其损失分布进行了研究。针对损失分布特性,提出了一种倾斜跟踪轴的槽式太阳能聚光集热器,并对该聚光集热器用于光煤互补电站后四季典型日的余弦损失、集热效率、太阳能瞬时功率、年均性能等进行了分析。结果表明,当跟踪轴倾斜角为15°时,年均余弦损失将从17.0%下降到9.8%,从而使年均集热效率从52.3%提升到59.5%,年均太阳能净发电效率从19.1%提升到21.7%,太阳能年发电量从17.2GW?h增加到19.6GW?h。A typical manner to employ solar hybrid coal-fired power production technology is to heat boiler feed water using solar thermal energy instead of the regenerative extraction steam in coal-fired power unit. Not only work output can be increased, but also fuel consumption and greenhouse gas emission can be reduced in this way. A typical 330MW solar-hybrid coal-fired power plant was taken as a case study to reveal the off-design thermodynamic performance. A tilted axis tracking solar collector was proposed, and the role on the cosine loss, the solar field efficiency, the net solar power was revealed. It is found that the annual cosine loss was decreased from 17% to 9.8% when the tilted angle is 15%. And the annual solar field efficiency is increased from 52.3% to 59.5%. The annual net solar-to-electricity efficiency is increased from 19.1% to21.7%. The annual solar power increased from 17.2 GWh to 19.2 GWh.

关 键 词：光煤互补 四季典型日 变辐照 余弦损失 倾斜跟踪轴槽式太阳能聚光集热器 

分 类 号：TK514[动力工程及工程热物理—热能工程]