基于集热管优化设计的热发电系统性能提升潜力研究

doi:10.1007/s11708-020-0707-y

Frontiers in Energy

2020, Vol. 14

Issue (4): 867-881 https://doi.org/10.1007/s11708-020-0707-y

研究论文

本期目录

基于集热管优化设计的热发电系统性能提升潜力研究

杨洪伦¹, 王其梁¹, 曹静宇¹, 裴刚¹(

), 李晶²(

)

¹. 中国科学技术大学热科学和能源工程系
². 英国赫尔大学工程和计算机科学学院

Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough receiver

Honglun YANG¹, Qiliang WANG¹, Jingyu CAO¹, Gang PEI¹(

), Jing LI²(

)

¹. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China
². School of Engineering and Computer Science, University of Hull, Hull, HU6 7RX, UK

全文: PDF(2045 KB) HTML

摘要:

本文建立了一个热发电系统的热力学和经济性综合模型，预测和比较例如采用传统和新型集热管的槽式热发电系统的性能。仿真结果表明，与传统集热管相比，采用新型集热管的发电系统具有更优越的热力学和经济性能。当集热场出口温度为550℃，位于凤凰城、塞维利亚和托托河采用新型集热管的热发电站的年发电量分别提高了8.5%、10.5%和14.4%，单位电力成本分别降低了6.9%、8.5%和11.6%。在凤凰城，通过采用新型集热管，发电站的最佳运行温度从500℃提高到560℃。此外，还对集热管热损失、涂层的吸收率和熔盐防凝温度进行了敏感性研究，以分析集热管性能对电站性能影响的一般规律。结果表明，低热损集热管与低熔点熔盐配置是改善太阳能热发电站综合性能的有效措施。

Abstract：

This paper proposes a comprehensive thermodynamic and economic model to predict and compare the performance of concentrated solar power plants with traditional and novel receivers with different configurations involving operating temperatures and locations. The simulation results reveal that power plants with novel receivers exhibit a superior thermodynamic and economic performance compared with traditional receivers. The annual electricity productions of power plants with novel receivers in Phoenix, Sevilla, and Tuotuohe are 8.5%, 10.5%, and 14.4% higher than those with traditional receivers at the outlet temperature of 550°C. The levelized cost of electricity of power plants with double-selective-coated receivers can be decreased by 6.9%, 8.5%, and 11.6%. In Phoenix, the optimal operating temperature of the power plants is improved from 500°C to 560°C by employing a novel receiver. Furthermore, the sensitivity analysis of the receiver heat loss, solar absorption, and freeze protection temperature is also conducted to analyze the general rule of influence of the receiver performance on power plants performance. Solar absorption has a positive contribution to annual electricity productions, whereas heat loss and freeze protection temperature have a negative effect on electricity outputs. The results indicate that the novel receiver coupled with low melting temperature molten salt is the best configuration for improving the overall performance of the power plants.

Key words： concentrated solar power parabolic trough receiver heat loss solar energy annual performance

收稿日期: 2020-04-10 出版日期: 2020-12-21

通讯作者: 裴刚,李晶 E-mail: peigang@ustc.edu.cn;Jing.Li@hull.ac.uk

Corresponding Author(s): Gang PEI,Jing LI

引用本文:

杨洪伦, 王其梁, 曹静宇, 裴刚, 李晶. 基于集热管优化设计的热发电系统性能提升潜力研究[J]. Frontiers in Energy, 2020, 14(4): 867-881.
Honglun YANG, Qiliang WANG, Jingyu CAO, Gang PEI, Jing LI. Potential of performance improvement of concentrated solar power plants by optimizing the parabolic trough receiver. Front. Energy, 2020, 14(4): 867-881.

链接本文:

https://academic.hep.com.cn/fie/CN/10.1007/s11708-020-0707-y
https://academic.hep.com.cn/fie/CN/Y2020/V14/I4/867

Parameters	Value
Aperture width/m	5.77
Length of collection assembly/m	150
Incident angle modifier	$cos ? θ + 0.000884 θ − 0.00005369 θ 2$
Optical efficiency of the collector	0.8711
Glass envelope outer/inner diameter/mm	125/120
Absorber outer/inner diameter/mm	70/66
Optical efficiency derate of receiver	0.8698

Tab.1

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Tab.2

Tab.3

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Tab.4

Tab.5

Fig.12

Fig.13

Fig.14

Fig.15

A	Area/m²
C	Cost
D	Diameter/m
e	Enthalpy/(J·kg⁻¹)
f_abs	Friction factor
h	Heat transfer coefficient/(W·m⁻²·K⁻¹)
k	Conduction coefficient/(W·m⁻¹·K⁻¹)
L	Length/m
m	Mass flow rate/(kg·s⁻¹)
Nu	Nusselt number
P	Perimeter/m
Pr	Prandtl number
$q ˙$	Thermal loss/(W·m⁻²)
$Q ˙$	Heat transfer rate/(W·m⁻¹)
Re	Reynolds number
T	Temperature/°C or K
v	Velocity/(m·s⁻¹)
$η$	Efficiency
$θ$	Incident angle/(°)
$Δ x$	Discrete unit length/m
$ξ IAM$	Incident angle modifier
$λ$	Thermal conductivity/(W·m⁻¹·K)
AEP	Annual electricity production
CRF	Capital recovery factor
CSP	Concentrated solar power
DNI	Direct normal irradiation
HTF	Heat transfer fluid
LCOE	Levelized cost of electricity
MS	Molten salt
SAM	Solar advisor model
SM	Solar multiple
Subscripts
a	Ambient
abs	Absorber
b	Frame
cond	Conduction heat transfer
conv	Convection heat transfer
cs	Cross section
eff	Effective
f	Heat transfer fluid
i	Inner
invest	Investment
o	Outer
OM	Operation and maintenance
SCA	Solar collector assembly

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