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Дисертації з теми "Centrifugal chiller"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 1 лютого 2022

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1

PEREIRA, Gutenberg da Silva. "Análise numérica e experimental de sistema de ar condicionado em edifícios verdes." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/19556.

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Submitted by Rafael Santana (rafael.silvasantana@ufpe.br) on 2017-07-12T17:40:35Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Tese_Gutenberg da Silva Pereira_1.pdf: 6410667 bytes, checksum: ddf1e84a9a1b8bcce71836f13e8707fa (MD5)<br>Made available in DSpace on 2017-07-12T17:40:35Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Tese_Gutenberg da Silva Pereira_1.pdf: 6410667 bytes, checksum: ddf1e84a9a1b8bcce71836f13e8707fa (MD5) Previous issue date: 2016-02-22<br>Com a atual escassez d

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2

Casetta, Damien. "Modèle d'aide à la conduite de réseaux de froid." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEM012.

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La maîtrise de la demande en climatisation des bâtiments tertiaires peut contribuer à la limitation du réchauffement climatique à 2°C. Les réseaux de froid urbain sont une solution pour répondre à cette demande avec une haute efficacité énergétique. Une conduite performante est cependant essentielle pour maintenir et augmenter leurs avantages compétitifs. L'objectif de la thèse est de contribuer à la construction d'un outil d'aide à la conduite journalière des réseaux de froid. La difficulté réside à deux niveaux : la diversité des décisions et la complexité des phénomènes physiques sous-jacen

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3

Jui, Wang Wen, and 王文瑞. "Economic Validation of VFD Centrifugal Chiller." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/z6c66y.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>100<br>Centrifugal chiller is the single largest Power consumptions in central HVAC system, Beside the chiller energy efficiency operation at 100% load, But make sure chiller operator at high efficiency at 50-60% part load of a chiller is critical to energy saving for a building performance . According the ARI standard 550/590-98 Integrated part Load Value. Non-standard Part-load Value (NPLV).Most of the Chillers operation 99% at part load condition , for the Multi-chillers plant room and all year chillers operation project required, VFD Chiller have huge

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4

Lung, Liu-Ching, and 劉青龍. "Economic Analysis of VFD Centrifugal Chiller." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/kcezqh.

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碩士<br>國立臺北科技大學<br>冷凍空調工程系所<br>93<br>Motors of chiller、cooling tower、pump and air handing units are the major part of electric power consumptions for HVAC system in normal building. When the building cooling load changed, Change the motor speed by variable frequency drive (VFD) is a good energy saving strange in recently years. Although commercial building largest single electric consumption is chiller. The relationship between variable frequency drive (VFD) and centrifugal chiller only can be seen in the paper study before. The large VFD (200~1200 HP) becomes more popular because cost down an

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5

鍾金龍. "The Study on Centrifugal Chiller Use Variable." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/72993855571894898287.

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碩士<br>國立臺北科技大學<br>冷凍與低溫科技研究所<br>90<br>Abstract This study discusses both theoretical and practical differences between centrifugal chiller unit with fixed speed (FS) guide vane capacity control, and variable frequency drive (VFD). The centrifugal chiller unit selection program is based on McQuay rating program. Both FS and VFD units ranged from 702kw to 3510kw are selected for this study based on three conditions which respectively are (1).using ARI Standard : leaving chilled water temperature 6.7℃、entering condenser water temperature 39.4℃ and following the change of ARI condenser

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6

Chen, Chung-Cheng, and 陳忠正. "Centrifugal Chiller Surging Prediction and Maintenance Strategy Development." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/uvfkv9.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>101<br>The first killer is the surging of centrifugal chillers, can make a huge vibration, and causing critical parts damage and out of order. In cope with the surge of Centrifugal chiller, the best strategy to get avoid surge occurred 、extending the life time of critical parts、reducing energy consumption、and running operation cost is choosing the Predictive Maintenance preventive management in advance。 This paper have made a Predictive Maintenance study by means of the real experience knowledge and system analysis that focused on the surge of the market

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7

Hsiung, Lai Chien, and 賴建雄. "Remote Monitoring and Fault Diagnosis of Centrifugal Chiller." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/yc7n65.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>104<br>The increasing running hours and poor repair of centrifugal chiller deteriorate the chiller equipment and increase the failure frequency, so that the faults increase, causing added burdens to the administrators and the manufacturers after-sales service. When the chiller has a problem, the user calls the manufacturer for help, the manufacturer sends a service engineer to the site for inspection and repair. In this process, the service engineer may carry improper tools and fittings, and the service engineer may fail to solve the problem on site, more sen

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8

Chiang, Yen-Shin, and 江衍欣. "CFC Conversion and Performance Analysis on Centrifugal Chiller Plants." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/63702816001142064974.

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9

Wang, Yi-Hua, and 王逸華. "Research on Energy Efficiency of Frequency Magnetic Centrifugal Chiller in Hospital." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/g38384.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>105<br>In this paper, the application of variable frequency magnetic centrifugal host in the hospital operation of the benefits of the study, due to the design of ice water mainframe tons of peak and multiplied by the future climate warming and other margin for the estimated number of air conditioning, but the actual Air conditioning load is not full year full load operation, so this study for part of the load period of research, the use of variable frequency magnetic centrifugal ice water mainframe used in part of the load operation. Therefore, this pape

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10

Yu, Pen-Liang, and 游本良. "The experimental analysis of the effect of cooling water and chilled water temperature on centrifugal chiller performance." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/52241047062254270434.

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碩士<br>國立中央大學<br>機械工程研究所碩士在職專班<br>94<br>Taiwan is located in the subtropical area with hot and humid climate in the summer. It requires a large number of air conditioning facilities. The chilled water is used to control the temperature and humidity in the industry, especially for the clean room to maintain the constant temperature and humidity. The chiller is the heart of the chilled water system, and its efficiency has a great influence on consumption of the energy. This research experimentally studies the performance of the chiller in different water temperature. The Taguchi method is used to

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11

Hsu, King-Huei, and 徐金輝. "A Study on Energy Saving Performance of Variable Frequency Drive Centrifugal Chiller." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/g3fktr.

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碩士<br>國立臺北科技大學<br>冷凍空調工程系所<br>94<br>Centrifugal chiller is the single largest electrical load in central air-conditioning system. Energy efficiency of a chiller is critical to energy saving performance for a building. This thesis presents that the COP of a variable frequency drive (VFD) centrifugal chiller at operating conditions here in Taiwan is far better than a constant speed drive (CSD) chiller. An ARI certified computer program is used to simulate operation of two 350 tons centrifugal chillers, one is VFD and the other one is constant speed. Analyzed results show that COP of a VFD chille

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12

Tadros, Amir The University of New South Wales School of Mechanical &amp Manufacturing Engineering UNSW. "Performance and safety of centrifugal chillers using hydrocarbons." 2008. http://handle.unsw.edu.au/1959.4/41242.

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The high ozone depletion and global warming potentials of fluorocarbon refrigerants have resulted in prohibitions and restrictions in many markets. Hydrocarbon refrigerants have low environmental impacts and are successfully used in domestic refrigerators and car air conditioners but replacing fluorocarbons in centrifugal chillers for air conditioning applications is unknown. Hydrocarbon replacements need a heat transfer correlation for refrigerant in flooded evaporators and predictions for operating conditions, capacity and performance. Safety precautions for large quantities of hydrocarbon r

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13

HUANG, KAI-CHANG, and 黃凱章. "Study on Energy Performance of Magnetic Bearing Centrifugal Chiller Applied in Factory Buildings." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/n2m9x7.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系<br>107<br>The purpose of this study was to study on energy performance of Magnetic Bearing Centrifugal Chiller Applied in Factory Buildings. Given that there were more manufacturers producing this kind of chillers and emphasizing the higher efficiency and energy saving rate, it did a 24-hours observation and collected data at it’s peak load and general load in order to verify the statement above and anticipate more general use of these chillers in office buildings and factories in the near furture. The research was based on the air conditioning system in the cer

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14

Yen, Kuang-Ting, and 顏光廷. "Energy Savings of a Variable Speed Drive Retrofit for a Fixed Speed Centrifugal Chiller." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/2v3j2e.

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碩士<br>國立臺北科技大學<br>冷凍與低溫科技研究所<br>102<br>Variable Speed Drive is wide application in air-conditioner industrial. It is one of the major device for energy saving strategy. Recenly, Variable Speed Drive is fully developed. The high capacity Variable Speed Drive becomes more popular because lower price and performance are improved. The research case used energy management system to record data in order to analysis running data when applying variable speed drive retrofit for a fixed speed centrifugal chiller. The measured data include chiller energy consumption, inter-guide-vane open percentage, fre

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15

WANG, HSIAO-WEN, and 王筱雯. "Application of GBDT and FCBF on the Fault Detection and Diagnosis of Centrifugal Chiller." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4k9nm9.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系<br>107<br>In this research, Data mining is applied to the fault diagnosis of Centrifugal Chiller. Then verify the research method through ASHRAE RP-1043[1] Centrifugal Chiller operational data, and make effective data classification by data mining. When the R software is applied for data mining, to imporve classification efficieny of large data amount and multiple variables, Dimension Reduction is applied to data before data analysis. Therefore, the Fast Correlation Based Filter for Feature Selection（FCBF） is used in this research to retrieve optimal feature subset

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16

Yang, Wen-lang, and 楊文郎. "Energy-saving Investigation though Applying Inverter-drive Centrifugal Chiller in a Car Spraying Manufacturing Factory." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7kvpfx.

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碩士<br>國立勤益科技大學<br>冷凍空調系<br>106<br>Analysis and discussion about chiller system replacement and energy saving of a car factory in Taiwan is studied. Because of early-constructed spraying method that used cold water loop for main air conditioning system was not efficient, without automatic control for the system. It wasted large amount of energy and results in huge operating cost. In order to meet the energy conservation requirements of government and to improve the air conditioning system simultaneously, energy-efficient chillers with VPF (Variable Primary Flow) system was conducted accordingly

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17

CHEN, YAO-PIN, and 陳耀斌. "A study on TAB and Energy Conservation of the Centrifugal Magnetic Suspension Water Chiller Unit." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wfa25n.

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碩士<br>國立勤益科技大學<br>冷凍空調與能源系<br>107<br>As global warming becomes more and more serious, mitigating global warming and reducing carbon dioxide emissions for the next generation have been everyone’s responsibility. In order to responded to this and reduce global warming, and lower carbon dioxide emissions, the Executive Yuan of Taiwan promoted the policy of energy conservation and carbon emission reduction. For this purpose, the energy conservation and carbon emission reduction promotion committee was established and the green smart building system was researched and developed. The energy consumed

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18

Shih, Po-Wei, and 施博偉. "Study on Power Consumption of Centrifugal Chiller Caused by Variation of Inlet Guide Vane and Diffuser." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/g6q9v6.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>105<br>Ever since a long time Building energy saving issues have been discussed. Electricity consumption comparison in the building equipment, the largest HVAC system power consumption. In HVAC system, chiller has been largely applied in office buildings, schools, hospitals and industrial system for cooling. This thesis that variation of inlet guide vane and diffuser open percentage on power consumption of chiller. The building is under study in Taipei city. Variation of inlet guide vane and diffuser opening percentage in different cooling water inlet tempera

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19

莊孟軒. "Optimal operation model analysis of secondary chilled water pumps and centrifugal chillers for air-conditioning system of semiconductor manufacturing." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/77476390213969778341.

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碩士<br>國立臺北科技大學<br>冷凍與低溫科技研究所<br>92<br>Energy crisis is a common problem, which will be encountered by all the human beings in the future. In these years, various devices and methods for energy saving is continually developed. Of course, includes using in air conditioning system. In summer, air-conditioner consumes 40%~50% of total electricity in general office building. In electronics manufactory, the power consumption of air-conditioner reaches to 30%~45%, that is quite huge. Accordingly, air conditioning system belongs to one of the heavy power-consumption device. Taiwan locates i

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20

Chen, Kuan-Min, and 陳冠銘. "R-123 Centrifugal Chiller’s refrigerant leakage study." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/32py3r.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>101<br>The environmental friendly, low-energy consumption and high-efficiency negative pressure centrifugal chiller is the primary choice of air conditioners currently. But the leakage of the refrigerant of the negative pressure centrifugal chiller is one of the major reasons causing damages to the centrifugal chiller component. Therefore, to increase the lifetime life and reduce the probability of malfunction and leakage is an important topic. Since short of the operational and maintenance personnel who truly understand and familiar with the negative pressur

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21

WANG, CHUNG-WEI, and 王忠維. "Benefit Analysis of Magnetic Bearing Centrifugal Chillers series Water Source Heat Pump." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/w2j29u.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系<br>107<br>This research is mainly used for the mixing of heat pump and ice water during the operation of maglev. Since the maglev has better integrated part load value (IPLV), it can obtain higher ice water efficiency under partial load. The heat pump has a higher heat transfer efficiency, and the energy transfer process requires only a small portion of the power to provide a better amount of hot water heating. In the case of this study, the improved efficiency of the maglev host can reach an average of about 28% to 30% energy saving. After the hot water is improve

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22

Chen, Chun-Hung, and 陳俊宏. "Study of an Automated Fault Detection and Diagnosis (FDD) Strategy for Centrifugal Chillers." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/36wuev.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>96<br>There are two kinds of centrifugal chiller faults, “Hard faults”and“Soft faults”. Soft faults means system operating process and unsuitable maintaining cause low performance fault, it is usually hard to find in the early stage. The fault can’t be detected and promulgated immediately, effecting the automatic control and performance monitor normal operation, causing large energy consumption. In order to raise the operating stability of centrifugal chiller in a long term, studying on an Automated Fault Detection and Diagnosis (FDD) Strategy research appear

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23

Chen, Ming-Ke, and 陳明科. "Energy Efficiency of Centrifugal Chillers under Different Heat Loads and Cooling Water Temperatures." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/29268326233620966979.

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碩士<br>國立勤益科技大學<br>冷凍空調系<br>101<br>In this study, centrifugal chillers of 1000 USRT with constant and varied speed in Chiayi area of Taiwan was investigated, respectively, in order to understand their operation efficiencies under different heat loads and different cooling temperatures. Through the simulation of the software, YORKWORK, it is found that the performance of the chiller with constant speed is superior to that of the chiller with varied speed while the operation condition is 100% heat load and the temperature of cooling water is above 27 ℃ or the operation condition is 90% heat load

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24

CHEN, WEI-CHUNG, and 陳緯中. "The Operation Efficiency Analysis of Varied Frequency Centrifugal Chillers in the Climate Conditions of Taiwan." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/41365489807242291735.

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博士<br>國立勤益科技大學<br>冷凍空調系<br>99<br>This study respectively simulated the operation efficiencies of constant and varied frequency centrifugal chillers with the same refrigerant capacity under the influence of different part load conditions and different inlet temperatures of cooling waters according to the climate conditions in Taiwan. The simulated results reveal that the operation of the varied frequency chiller can reach better efficiencies under the conditions of lower inlet temperature of the cooling water and part load operation. In comparison with the constant frequency chiller, while the

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25

CHENG, CHIH-MING, and 鄭智銘. "A Case Study: The Application of Two-Stage Variable Frequency Centrifugal Chillers in A Medical Center." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/773dqk.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系<br>107<br>Location: Taiwan - Taipei City, Building Use: Medical Center (5185 people), Area Range: Floor area of 364,500 square meters, Air-conditioning area: 325,700 square meters, There are 9 units of 9520RT Because the original system is all fixed-frequency centrifuge chiller, the low-load efficiency is relatively poor. In this study, we replaced three centrifuge chiller such as R-3&R-4 total two 1500RT (efficiency 0.65kW/RT) and R-8 one 800RT (efficiency 0.83kW/RT). 800RT chiller original The centrifuge chiller for ice storage has been scrapped and disabled. Two

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26

Chiang, Chang-Hsueh, and 江長學. "Development of Fault Detection and Diagnosis Strategy Using Fuzzy Inference and Neural Network Theories for Centrifugal Liquid Chillers." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/8ucgku.

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碩士<br>國立臺北科技大學<br>冷凍空調工程系所<br>98<br>Aim of this research is using theories of fuzzy inference and neural network to develop fault detection and diagnosis (FDD) strategy for centrifugal chiller. And explore to influence of fault diagnosis rate and misdiagnosis rate in different fault diagnosis strategy to find more suitable fault detection and diagnosis strategy for centrifugal chiller. For seven soft fault of centrifugal chiller, fault diagnosis rate and misdiagnosis rate of fuzzy inference FDD strategy were 88.0% and 12.0%; fault diagnosis rate and misdiagnosis rate of neural network FDD stra

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Ling, Shih-Kang, and 凌士剛. "Study of the Influence of Predicting Accuracy of Performance-Index Regression Models on Fault Detection and Diagnosis Strategy for Centrifugal Chillers." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/49af97.

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碩士<br>國立臺北科技大學<br>能源與冷凍空調工程系碩士班<br>97<br>This research mainly explores the influence of predicting accuracy of performance-index regression models on fault detection and diagnosis rate, so as to get the best performance-index regression models for developing centrifugal chiller FDD strategy. First, use the experimental data─five centrifugal chiller regression models, to make an overall evaluation of eleven performance indices’ predicting accuracy. And then apply the six soft- fault experimental data into five performance-index regression models to analyze Fault detection and diagnosis rate.

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