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Impact of Startup Strategy and Buffer Tank Volume on the Compressor Inlet State for a 3-MW sCO2 Brayton Cycle

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Journal of Thermal Science 2025年第1期 159-175页

作者： zhao Decai WANG Bo Key Laboratory of Advanced Energy and Power Institute of Engineering Thermophysics(IET)Chinese Academy of Sciences (CAS) University of Chinese Academy of Sciences

The supercritical carbon dioxide（sCO2） Brayton cycle system has become an emerging and highly promising method of thermal power conversion due to its efficiency advantage,system compactness,and excellent adaptability of the heat *** the low carbon sCO2Brayton cycle testbed with cycle output power approaching 3 MW,a relatively detailed dynamic simulation model of the entire system is constructed to explore the dynamic response characteristics of the system with different startup strategies and different buffer tank volumes during the startup *** simulation results indicate that the smaller the volume of the buffer tank,the more rapid and obvious the parameter fluctuation in the buffer tank during the *** the allowable relative deviation limit of density is 5%,then the ratio of the buffer tank volume to the volume of the entire closed loop should not be lower than 36.80%.The strategy of simultaneous temperature and speed increase during turbine bypass start can effectively reduce the fluctuation of compressor inlet parameters and reach the steady-state more *** paper provides the recommended matching table for the opening of the turbine bypass valve（TBV） and the main regulating valve（MGV） to reduce the parameter fluctuation during the bypass *** effectiveness of the proposed turbine bypass and bypass switching startup strategy is verified by simulation,which may be used as a reference for test bench's future debugging and operation.

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Low-Temperature Fabrication of Stable Black-Phase CsPbI₃ Perovskite Flexible Photodetectors Toward Wearable Health Monitoring

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NANO-MICRO LETTERS 2025年第1期17卷 1-14页

作者： zhao, Yingjie Sun, Yicheng Pei, Chaoxin Yin, Xing Li, Xinyi Hao, Yi Zhang, Mengru Yuan, Meng Zhou, Jinglin Chen, Yu Song, Yanlin Zhengzhou Univ Coll Chem Zhengzhou 450001 Peoples R China Zhengzhou Univ Pingyuan Lab Zhengzhou 450001 Peoples R China Chinese Acad Sci Inst Chem Key Lab Green Printing Beijing 100190 Peoples R China Chinese Acad Sci Tech Inst Phys & Chem Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China

Low-temperature fabrication of black-phase CsPbI3 perovskite films is first demonstrated by using diphenylphosphinic chloride additive under 30-50 degrees C, arising from the steric effect and chloride insertion ***-area high-quality all-inorganic perovskite films with fewer defects enhanced crystallographic orientation, and excellent environmental stability is *** record performances are demonstrated for flexible wearable photodetectors with a responsivity of 42.1 A W-1, a detectivity of 1.3 x 1014 Jones, high-fidelity image, photoplethysmography sensor functions, and high mechanical stability. Flexible wearable optoelectronic devices fabricated from organic-inorganic hybrid perovskites significantly accelerate the development of portable energy, biomedicine, and sensing fields, but their poor thermal stability hinders further applications. Conversely, all-inorganic perovskites possess excellent thermal stability, but black-phase all-inorganic perovskite film usually requires high-temperature annealing steps, which increases energy consumption and is not conducive to the fabrication of flexible wearable devices. In this work, an unprecedented low-temperature fabrication of stable black-phase CsPbI3 perovskite films is demonstrated by the in situ hydrolysis reaction of diphenylphosphinic chloride additive. The released diphenyl phosphate and chloride ions during the hydrolysis reaction significantly lower the phase transition temperature and effectively passivate the defects in the perovskite films, yielding high-performance photodetectors with a responsivity of 42.1 A W-1 and a detectivity of 1.3 x 1014 Jones. Furthermore, high-fidelity image and photoplethysmography sensors are demonstrated based on the fabricated flexible wearable photodetectors. This work provides a new perspective for the low-temperature fabrication of large-area all-inorganic perovskite flexible optoelectronic devices.

关键词： In situ hydrolyzation Low-temperature processing All-inorganic perovskite Flexible photodetectors Health monitoring

ELASTO-PLASTIC BRANCHED ANALYSIS FOR AN INTERFACE CRACK BASED ON CRACK ENERGY DENSITY

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Acta Mechanica Solida Sinica 1995年第2期8卷 171-177页

作者： FAN, xy SATO, Y WATANABE, K TAIYUAN UNIV TECHNOL INST APPL MECHTAIYUAN 030024PEOPLES R CHINA UNIV TOKYO INST IND SCITOKYO 106JAPAN

The elasto-plastic finite element analyses for an interface crack in dissimilar material, based on the crack energy density (CED) concept, are investigated in mode I loading condition. It is confirmed that the values of CED almost remain stable when the notch radius rho is sufficiently small, both in elastic and elasto-plastic case. Numerical results for both elastic and elasto-plastic cases show that under the mode I loading condition, when the crack propagates to the more stiff material with a small angle, the total CED will become larger than that along the interface. If the clack heads into the more compliant material, the CED will become less than that along the interface.

关键词： INTERFACE CRACK CRACK ENERGY DENSITY

A FINITE ELEMENT ANALYSIS OF THE LARGE PLASTIC DEFORMATION BEHAVIOR OF AMORPHOUS GLASSY CIRCULAR POLYMERIC BARS

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Acta Mechanica Solida Sinica 1997年第2期10卷 138-147页

作者： Hu, P Liu, xy Na, JX JILIN UNIV TECHNOL DEPT APPL MECHCHANGCHUN 130025PEOPLES R CHINA JILIN UNIV TECHNOL DEPT MECH ENGNCHANGCHUN 130025PEOPLES R CHINA

The BPA eight-chain molecular network model is introduced into the finite element formulation of elastic-plastic large deformation. And then, the tensile deformation localization development of the amorphous glassy circular polymeric bars (such as polycarbonates) is numerically simulated. The simulated results are compared with experimental ones, and very good consistence between numerical simulation and experiment is obtained, which shows the efficiency of the finite element analysis. Finally, the influences of the microstructure parameter S-ss on tensile neck-propagation and triaxial stress effect are studied.

关键词： BPA molecular network model finite element formulation amorphous glassy circular polymeric bars deformation localization development

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催化裂解装置掺炼减压渣油的生产实践

石油炼制与化工 2025年第1期56卷 131-137页

作者：赵长斌中海石油宁波大榭石化有限公司浙江宁波315812

某公司在2.2 Mt/a催化裂解(DCC)装置上进行了掺炼减压渣油(简称“减渣”)的生产实践。针对掺炼减渣后,混合原料性质变差对装置产品分布、产品性质、操作参数、催化剂剂耗、能耗、以及长周期稳定运行的影响进行了综合分析,并采取了相应... 详细信息

某公司在2.2 Mt/a催化裂解(DCC)装置上进行了掺炼减压渣油(简称“减渣”)的生产实践。针对掺炼减渣后,混合原料性质变差对装置产品分布、产品性质、操作参数、催化剂剂耗、能耗、以及长周期稳定运行的影响进行了综合分析,并采取了相应的应对措施。结果表明:通过将上游装置原料改为中轻质原油,改善了DCC装置掺炼减渣原料的品质;通过优化DCC装置掺炼比例,调整DCC装置操作参数,增加金属钝化剂加入量,加大催化剂置换量等一系列应对措施,削弱了原料残炭升高导致装置结焦倾向增大,以及Ni、Ca、Fe等重金属污染催化剂的不利影响,开创了同类装置掺炼减渣的先例,保证了装置安全平稳运行;当减渣掺炼比(w)达44.4%时,装置总液体收率降低1.61百分点,焦炭产率增加1.87百分点,能耗增加230.903 MJ/t。

关键词：催化裂解减压渣油原料优化催化剂钙

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基于响应面分析下中草药移栽机的优化设计

农机化研究 2025年第1期47卷 135-141页

作者：赵厚睿刘臻湖北中医药大学武汉430065 湖北轻工职业技术学院武汉430070

通过响应面分析法对中草药移栽机进行优化设计,以提高中草药种植效率和质量。首先,选取移栽速度、移栽深度和移栽器械倾角3个因素作为设计变量,选取移栽成功率和移栽损伤率作为评价指标;在此基础上,设计了一个采用多种传感器组合的控制... 详细信息

通过响应面分析法对中草药移栽机进行优化设计,以提高中草药种植效率和质量。首先,选取移栽速度、移栽深度和移栽器械倾角3个因素作为设计变量,选取移栽成功率和移栽损伤率作为评价指标;在此基础上,设计了一个采用多种传感器组合的控制系统,采用模糊控制算法进行控制,并通过试验得到的数据进行响应面分析,得出了最优设计方案。研究结果表明:最优移栽速度为0.2 m/s,最优移栽深度为15 cm,最优移栽器械倾角为25°;通过优化设计,中草药移栽机的移栽成功率提高了11.8%,移栽损伤率降低了9.6%,取得了较好的效果。

关键词：移裁机响应面分析参数优化多传感器中草药

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Making our contributions to past global change——An introduction to a recently fulfilled program supported by the National Natural Science Foundation of China

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Chinese Science Bulletin 1997年第23期42卷 2022-2024页

作者： Chai, YC Tian, xy Ma, FC Natl Nat Sci Fdn China Dept Earth Sci Beijing 100083 Peoples R China

IN recent years, a series of environmental problems have attracted wide attention in the *** environmental changes can result from both the operations of natural factors and human ac-tivities, the international science community has the common opinion that environmental prob-lems should be studied in a broader perspect. In other words, the earth environment should beregarded as an entity that consists of many interactive and interrelated parts. Highlighted

关键词： An introduction to a recently fulfilled program supported by the National Natural Science Foundation of China Making our contributions to past global change

Synthesis and structural characterization of a new trimetallic thiocubane cluster

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Chinese Journal of Chemistry 1997年第2期15卷 114-122页

作者： Yu, RM Lu, SF Huang, xy Huang, JQ CHINESE ACAD SCI FUJIAN INST RES STRUCT MATTERFUZHOU 350002FUJIANPEOPLES R CHINA

The trimetallic cluster W2CuAgS4(TDT)(2)(PPh3)(2) . CH2Cl2 (TDT=[S-2(C6H3)CH3](2-)) (2) has been prepared from the reaction of the well-defined molecule building block [W2S4(TDT)(2)](2-) (1) with AgNO3, CuBr and PPh3. The structure contains a [W2CuAgS4](4+) distorted cubane-like core, Two types of metal-metal bonds exist in the core, One is W-W bond of which length is 0.2871(1) nm, the other is W-M' (M'=Cu or Ag) bends, whose mean distance is 0.2980 nm. The details of synthesis, structure, IR, UV-Vis and P-31 NMR spectra are reported. The crystallographic data are: space group P2(1)/n, with a=1.6987(4), b=1.7763(6), c=1.8918(5) nm, beta=98.54(2)degrees, V=5.645(3) nm(3), Z=4, and final R=0.043 for 6437 observed reflections.

关键词： W-Cu-Ag-S cubane-like cluster structure synthesis

EFFECT OF ELECTROLESS PLATING COBALT UPON CHARACTERISTICS OF NICKEL HYDROXIDE ELECTRODEFORRECHARGEABLEALKALINEBATTERIES

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中国有色金属学会会刊：英文版 1998年第4期8卷 135-141页

作者： Wang, xy Zhang, YS Yan, J Yuan, HT Song, DY Nankai Univ Inst New Energy Mat Chem Tianjin 300071 Peoples R China

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ＩＮＴＲＯＤＵＣＴＩＯＮＮｉｃｋｅｌｈｙｄｒｏｘｉｄｅｅｌｅｃｔｒｏｄｅｓｈａｖｅｂｅｅｎｗｉｄｅｌｙｕｓｅｄａｓｐｏｓｉｔｉｖｅｅｌｅｃｔｒｏｄｅｉｎＮｉＣｄ，ＮｉＨ２ａｎｄＮｉＭＨｓｅｃｏｎｄａｒｙｂａｔｅｒｉｅｓ．Ｉｍｐｒｏｖｅｍｅｎｔ...

关键词： nickel hydroxide electrode electroless plating cobalt electrode performance electrochemical impedance conductivity