Numerical Study of New-Type Receiver with Axially-Hollow Spiral Deflector for Parabolic Trough Direct-Steam-Generation Loop of Concentrating Solar Power System  

作　　者：SHI Yaolu SUN Jie WEI Jinjia 

机构地区：[1]School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,China [2]Adv Energy Sci&Technol Guangdong Lab,Foshan Xianhu Lab,Xianhu Hydrogen Valley,Foshan 528200,China

出　　处：《Journal of Thermal Science》2023年第2期597-610,共14页热科学学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (52176202);the Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory (41200101)。

摘　　要：The thermal stress-induced deformation issue of receiver is crucial to the performance and reliability of a parabolic-trough(PT) concentrating solar power(CSP) system with the promising direct steam generation(DSG) technology.The objective of the present study is to propose a new-type receiver with axially-hollow spiral deflector and optimize the geometric structure to solve the above issue.To this end,optical-flow-thermal multi-physics coupling models have been established for the preheating,boiling and superheating sections of a typical PT-DSG loop.The simulation results show that our proposed new-type receiver demonstrates outstanding comprehensive performance.It can minimize the circumferential temperature difference through the spiral deflector while lower the flow resistance cost through the axially hollow structure at the same time.As quantitatively evaluated by the temperature uniformity improvement(ε_(ΔT)) and the performance evaluation criteria(PEC),different designs are achieved based on different optimal schemes.When ε_(ΔT)is of primary importance,the optimal design with torsional ratio of 1 is achieved,with ε_(ΔT)=25.4%,25.7%,41.5% and PEC=0.486,0.878,0.596corresponding to preheating,boiling,superheating sections,respectively.When PEC is of primary importance,the optimal design with torsional ratio of 6-6.5 is achieved,with PEC=0.950,2.070,0.993 and ε_(ΔT)=18.2%,13.3 %,19.4% corresponding to preheating,boiling,superheating sections,respectively.

关 键 词：concentrating solar power parabolic though collector direct steam generation performance evaluation criteria axially-hollow spiral deflector 

分 类 号：TM615[电气工程—电力系统及自动化]