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Performance Assessment of Air-Cooled Steam condenser with Guide Vane Cascade

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Journal of Thermal Science 2019年第5期28卷 993-1003页

作者： ZHANG Xuelei LI Yunpeng CHEN Haiping School of Energy Power and Mechanical Engineering North China Electric Power University

Ambient wind has an unfavourable impact on air-cooled steam condenser(ACSC) performance. A new measure to improve ACSC performance is proposed by setting a diffusion type guide vane cascade beneath the ACSC platform. The numerical models are developed to illustrate the effects of diffusion type guide vane cascade on ACSC performance. The simulation results show that this vane cascade can cause the increases in coolant flows across almost all fans due to its diffusion function and lower flow resistance. Meanwhile, the guide vane cascade also decreases the fan inlet temperatures because of the uniform flow field around the condenser cells. Comparing with the case without guide device, the overall heat transfer efficiency is increased by 11.2% for guide vane cascade case under the condition of 9 m/s. The heat transfer efficiency firstly enhances and then decreases with decreasing stagger angle of guide vane under a certain wind speed. The optimum stagger angle corresponding to the maximum heat transfer efficiency is about 65.5°. The heat transfer efficiency always enhances as increasing vane cascade height, and a vane cascade with 20 m to 30 m height may be suitable to the ACSC as considering the cost.

关键词： air-cooled steam condenser ambient wind guide vane cascade heat transfer

METHODS FOR CALCULATING SHELL-SIDE CONDENSATION HEAT TRANSFER AND PRESSURE DROP OF RODBAFFLE condenser

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Chinese Journal of Chemical Engineering 1996年第1期4卷 93-97页

作者：思勤刘昌俊黄鸿鼎天津大学化学工程系天津

1 INTRODUCTIONGentry,Yong and Small [1-3]have described their Rodbaffle heat exchangers,whichare geometrically shell-and-tube exchangers consisting of a series of shell-side bafflesas an array of supporting *** supporting-rod matrix creates an unobstructedflow path and makes the flow field in the shell-side of the heat exchangerpredominantly longitudinal bringing along flow-induced tube vibration in a cross *** neither bundle cross flow form drag nor repeated flow reversal ef-fects being present,the shell-side pressure losses in Rodbaffle heat exchangers are *** heat exchangers also offer an enhanced thermal performance.

关键词： condensation heat transfer pressure drop Rodbaffle condenser

Measurement Methodology for Monitoring Fouling Resistance in condenser of Chiller

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湖南大学学报（自然科学版） 2009年第S1期36卷 119-122页

作者： YU Dan1,3,GAN Li-si1,CAO Yong2(1.Beijing University of Technology,Beijing 100022,China 2.Build Environment and Energy Efficiency,China Academy of Building Research,Beijing 100013,China 3.Beijing Institute of Civil Engineering and Architecture,Beijing 100044,China) Beijing University of Technology Beijing 100022 China Build Environment and Energy Efficiency China Academy of Building Research Beijing 100013 China Beijing Institute of Civil Engineering and Architecture Beijing 100044 China

This paper established an on-line monitoring model for fouling resistance of cooling water based on heat transfer theory,which was mainly applied to the fouling resistance test for condenser of chiller in operation,and the test requirements were *** proves that the load ratio of chiller has big influence on the test result,and the best load ratio for test is the range of 80%～100%.A case has been executed to validate the model's feasibility.

关键词： fouling resistance monitoring condenser cooling water

Independent component analysis approach for fault diagnosis of condenser system in thermal power plant

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Journal of Central South University 2014年第1期21卷 242-251页

作者： Ajami Ali Daneshvar Mahdi School of Electrical Engineering Azarbaijan Shahid Madani University MAPNA Electrical and Control Engineering and Manufacturing Company (MECO)

A statistical signal processing technique was proposed and verified as independent component analysis(ICA) for fault detection and diagnosis of industrial systems without exact and detailed ***,the aim is to utilize system as a black *** system studied is condenser system of one of MAPNA's power *** first,principal component analysis(PCA) approach was applied to reduce the dimensionality of the real acquired data set and to identify the essential and useful ***,the fault sources were diagnosed by ICA *** results show that ICA approach is valid and effective for faults detection and diagnosis even in noisy states,and it can distinguish main factors of abnormality among many diverse parts of a power plant's condenser *** selectivity problem is left unsolved in many plants,because the main factors often become unnoticed by fault expansion through other parts of the plants.

关键词： condenser fault detection and diagnosis independent component analysis independent component analysis (ICA) principal component analysis (PCA) thermal power plant

Research on condenser Deterioration Evolution Trend Based on ANP-EWM Fusion Health Degree

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 679-698页

作者： Hong Qian Haixin Wang Guangji Wang Qingyun Yan College of Automation Engineering Shanghai University of Electric PowerShanghai200090China Shanghai Key Laboratory of Power Station Automation Technology Shanghai200072China Empower Information Technology(Shanghai)Co. Ltd.Shanghai201508China China Nuclear Power Engineering Design Co. Ltd.Shenzhen518052China

This study presents a proposed method for assessing the condition and predicting the future status of condensers operating in seawater over an extended *** aim is to address the problems of scaling and corrosion,which lead to increased loss of cold *** method involves utilising a set of multivariate feature parameters associated with the condenser as input for evaluation and trend *** methodology offers a precise means of determining the optimal timing for condenser cleaning,with the ultimate goal of improving its overall *** proposed approach involves the integration of the analytic network process with subjective expert experience and the entropy weightmethod with objective big data analysis to develop a fusion health *** mathematical model is constructed quantitatively using the improved Mahalanobis ***,a comprehensive prediction model is developed by integrating the improved Informer model and Markov error *** model takes into account the health status of the equipment and several influencing factors,includingmultivariate feature *** model facilitates the objective examination and prediction of the progression of equipment deterioration *** present study involves the computation and verification of the field time series data,which serves to demonstrate the accuracy of the condenser health-related models proposed in this *** models effectively depict the real condition and temporal variations of the equipment,thus offering a valuable method for determining the precise cleaning time required for the condenser.

关键词： condenser health degree improved Mahalanobis distance GC-Informer model Markov error correction

Numerical Simulations of a Micro-Channel Wall-Tube condenser for Domestic Refrigerators

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Tsinghua Science and Technology 2010年第4期15卷 426-433页

作者：张会勇李俊明李红旗 Key Laboratory of Thermal Science and Power Engineering of Ministry of Education Department of Thermal Engineering Tsinghua University College of Environmental and Energy Engineering Beijing University of Technology

In recent years, microchannel heat exchangers have begun to be used in refrigeration and air conditioning systems. This paper introduces a microchannel condenser for domestic refrigerators with a theoretical model to evaluate its performance. The model was used to obtain the optimal design parameters for different numbers of tubes and tube lengths. The results show that the needed tube height of the down- ward section decreases with the number of tubes and the tube diameter. Compared with the original con- denser, the present optimal design parameters can reduce the total metal mass by 48.6% for the two wall two side design and by 26% for the two wall one side design. Thus, the present condenser is much better than the condensers usually used in actual domestic refrigerators.

关键词： refrigerator micro-tube condenser numerical simulation

Review:Solar Still with Additional condenser

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Journal of Harbin Institute of Technology(New Series) 2023年第3期30卷 60-67页

作者： Azad A.Hussein Najim Abid Jassim Mechanical Engineering Department Engineering CollegeUniversity of BaghdadBaghdad 10011Iraq

Getting consumable water to individuals has been a continuous challenge *** or non⁃purified water sources are responsible for the bulk of human *** demand for water purification that does not harm the biological system is ***⁃based desalination is one of the effective water purification methods creating ultra⁃pure refined ***⁃based still refining frameworks offer maintainable devices for a freshwater *** plans were tried by analysts to move forward the efficiency of sun⁃powered *** to the experiments,solar still coordinates outside or inside the condenser is considered to be a valid and successful *** survey hopes to show,explain,and study the performance of several solar stills combined with diverse condenser designs.

关键词： solar still desalination condenser renewable energy distillate yield

The condenser Performance Test and Thermal Performance Analysis of Variable Conditions in TQNPC

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Energy and Power Engineering 2013年第4期5卷 566-569页

作者： Qingsen Zhao Debing Deng Yong Liu Wei Chen Jiayong Wang Jun Xiang Song Hu State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan China The Mal Power Technology Center Suzhou Nuclear Power Research Institute Suzhou China

condenser is one of the important auxiliary equipments in nuclear power plants. The thermal efficiency of the entire unit was depended on the condenser performance. Cleanliness factor and condenser corrected pressure are the two most important evaluation indexes. The definition and derivation of these two evaluation indexes were elaborated and clarified in this paper. And the condenser performance at variable conditions was analyzed. The seawater temperature, pipe plugging rate and seawater volume rate effect on unit output was calculated. The calculation method was simple, which can provide reference guidance for similar power plant.

关键词： condenser Performance Test Variable Condition TQNPC

Nonlinear online process monitoring and fault diagnosis of condenser based on kernel PCA plus FDA

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Journal of Southeast University(English Edition) 2007年第1期23卷 51-56页

作者：张曦阎威武赵旭邵惠鹤上海交通大学自动化系上海200240

A novel online process monitoring and fault diagnosis method of condenser based on kernel principle component analysis （KPCA） and Fisher discriminant analysis （FDA） is presented. The basic idea of this method is： First map data from the original space into high-dimensional feature space via nonlinear kernel function and then extract optimal feature vector and discriminant vector in feature space and calculate the Euclidean distance between feature vectors to perform process monitoring. Similar degree between the present discriminant vector and optimal discriminant vector of fault in historical dataset is used for diagnosis. The proposed method can effectively capture the nonlinear relationship among process variables. Simulating results of the turbo generator＇s fault data set prove that the proposed method is effective.

关键词： nonlinear kernel PCA FDA process monitoring fault diagnosis condenser