超临界二氧化碳循环关键部件成本模型研究进展
王雪 1,孙恩慧 1*,徐进良 1,乔加飞 2,王兵兵 2
(1. 低品位能源多相流与传热北京市重点实验室(华北电力大学),北京市 昌平区 102206;
2.国家能源集团新能源技术研究院有限公司,北京市 昌平区 102206)
Cost models of key components of supercritical carbon dioxide cycle: research progress
WANG Xue1, SUN Enhui1*, XU Jinliang1, QIAO Jiafei2, WANG Bingbing2
(1.The Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy Utilization (North
China Electric Power University), Changping District, Beijing 102206, China; 2. CHN Energy New Energy
Technology Research Institute CO., LTD., Changping District, Beijing 102206, China)
ABSTRACT: The application of supercritical carbon
dioxide (sCO2) cycle has received extensive attention in
different fields, but its cost-benefit-analysis system is still
incomplete. When the accurate sCO2 cycle component cost
model is obtained, the design goal of the sCO2 cycle for
engineering applications will be shifted from efficiency
optimization to cost-benefit maximization. The cost formulas
for the key components of the sCO2 cycle are reviewed and
classified. It can be found that the cost formula is usually a
power function of the "scaling parameter ", and the methods
for obtaining the undetermined coefficient are different.
Based on the sCO2 cycle thermodynamic calculation results
under different design conditions, the characteristics of the
sCO2 cycle components cost formulas are compared and
analyzed. The results show that the calculation of different
cost formulas for each component under the same design
conditions are quite different, and the higher cost is mainly
caused by the unreasonable scale of the reference cost
relationship. Turbine costs are generally too large, the
compressor costs are obviously differentiated in two poles.
The research on the heat exchanger cost model takes various
factors into consideration. On the whole, based on the heat
conductance UA can better reflect the cost characteristics of
the heat exchanger. Against the research progress, several
problems that need to be solved urgently in the cost
calculation of sCO2 cycle components are pointed out. The
component cost formulas which are not specifically used for
sCO2 cycle is selected, lack of rationality verification
analysis. Temperature and pressure correction factors should
be included in the cost formula. The quantitative research on
the cost formula uncertainty is still insufficient.
KEY WORDS :supercritical carbon dioxide cycle;
recuperator; turbine; compressor; cooler; heater; cost model
摘要:超临界二氧化碳(Supercritical carbon dioxide, sCO2)
循环的应用在不同领域受到广泛关注,但其成本效益评估
体系仍不完善。获得准确的 sCO2循环部件成本模型,将
使工程应用的 sCO2循环的设计目标从效率最优转向成本
效益最大化。本文分类综述了 sCO2循环关键部件成本公
式的研究进展。通过总结发现,成本公式通常为“缩放参
数”的幂函数,函数待定系数确定方法各不相同。基于不
同设计条件下 sCO2循环热力计算结果,对比分析了现有
sCO2循环部件成本公式特点。结果表明,相同设计条件
下不同成本公式计算结果相差较大,其中较高的成本是由
于参考成本关系缩放不合理造成。透平成本计算结果普遍
偏大,压缩机成本两级分化明显。换热器成本模型的研究,
考虑因素多样,综合来看,基于热导 UA 确定成本更能体
现换热器成本特性。针对研究现状,指出了 sCO2循环部
件成本计算亟待解决的问题:选用非特定用于 sCO2循环
的部件成本公式,缺乏合理性验证分析;成本公式中应包
含温度、压力等校正因子;对成本公式不确定性的量化研
究尚有不足。
关键词:超临界二氧化碳循环;回热器;透平;压缩机;
冷却器;加热器;成本模型
0 引言
sCO2循环有望成为新一代发电动力循环。与
传统水蒸气朗肯循环相比,中高温下的 sCO2循
环在效率、紧凑性、灵活性、耐腐蚀性[1]等方面
均具有明显的优势,适于分布式能源系统、利于
基金项目:国家自然科学基金创新研究群体科学基金(51821004);
中央高校基本科研业务费专项资金资助(2021MS076)。
The Science Fund for Creative Research Groups of the National Natural
Science Foundation of China (51821004); The Fundamental Research
Funds for the Central Universities (2021MS076)
网络首发时间:2021-09-08 11:14:23
网络首发地址:https://kns.cnki.net/kcms/detail/11.2107.tm.20210908.0952.005.html