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The transient state modeling and optimization of refrigerant charge amount for a household refrigerator : 가정용 냉장고의 동적 해석 모델을 통한 냉매 량 최적화
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김민수 | - |
dc.contributor.author | 차상열 | - |
dc.date.accessioned | 2017-07-14T03:38:28Z | - |
dc.date.available | 2017-07-14T03:38:28Z | - |
dc.date.issued | 2015-08 | - |
dc.identifier.other | 000000067160 | - |
dc.identifier.uri | https://hdl.handle.net/10371/123846 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2015. 8. 김민수. | - |
dc.description.abstract | Energy consumption regulation of household refrigerator has been
continuously strengthened worldwide. In Korea, energy efficiency rating labeling was enforced from 1992. According to data from the Korea Energy Management Corporation (KEMCO), energy consumption of refrigerators has been reduced 59% over 15 years. Because of that, most refrigerator manufacturers are seeking ways to improve thermal and electrical performance of their products. In general, researching and development method of refrigerator is trial and error procedure, which is time consuming and costly. Hence, numerical analysis represent an essential tool to improve time and cost. Therefore, a study for the numerical simulation of the refrigerator has been conducted actively. In this study, experiments were conducted together with the numerical simulation to find the refrigerant charging amount of minimizing the power consumption of household refrigerator, which has capillary tube with heat exchanger. The experimental data were obtained in refrigerant charge range from 80 g to 125 g at ambient temperature of 25℃. According to the experimental data, the power consumption of household refrigerators has been minimized at the refrigerant amount 104g. The numerical simulation was computed under the same condition of the experiments by finite difference method. The numerical data showed that power consumption was minimized at refrigerant amount 98 g. Numerical simulation result was compared with experimental data, and it was found that optimal refrigerant charge amount was well predicted by the model. | - |
dc.description.tableofcontents | Contents
Abstract .................................................................................... i Contents ................................................................................. iii List of Tables ........................................................................... v List of Figures ........................................................................ vi Nomenclatures ..................................................................... viii Chapter 1. Introduction ........................................................... 1 1.1 Background of the study ......................................................... 1 1.2 Literature review ..................................................................... 3 1.3 Objectives and scope of the study ........................................... 4 Chapter 2. Transient state modelling of the household refrigerator ........................................................... 5 2.1 Introduction ............................................................................. 5 2.2 Specification of the studied household refrigerator ................ 6 2.3 Component modelling ............................................................. 6 2.3.1 Compressor modelling .......................................................... 6 2.3.2 Heat exchanger modelling .................................................. 10 2.3.3 Capillary tube modelling ..................................................... 13 2.3.4 Accumulator modelling ...................................................... 16 2.3.5 Cabinet modelling ............................................................... 16 2.4 Simulation procedure ............................................................ 18 2.5 Simulation results of the studied household refrigerator ...... 19 Chapter 3. Experimental study on the household refrigerator system ................................................................ 25 3.1 Introduction ........................................................................... 25 3.2 Experimental setup and measurement................................... 25 3.2.1 Experimental setup .............................................................. 25 3.2.2 Measurement ....................................................................... 29 3.3 Test conditions ...................................................................... 32 3.4 Experimental results .............................................................. 34 Chapter 4. Conclusion ........................................................... 37 References ............................................................................. 39 Abstract(Korean) ................................................................... 40 | - |
dc.format | application/pdf | - |
dc.format.extent | 1336178 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Household refrigerator | - |
dc.subject | Optimization of refrigerant charge amount | - |
dc.subject | Transient state modelling | - |
dc.subject | Non-adiabatic capillary tube | - |
dc.subject.ddc | 621 | - |
dc.title | The transient state modeling and optimization of refrigerant charge amount for a household refrigerator | - |
dc.title.alternative | 가정용 냉장고의 동적 해석 모델을 통한 냉매 량 최적화 | - |
dc.type | Thesis | - |
dc.description.degree | Master | - |
dc.citation.pages | 40 | - |
dc.contributor.affiliation | 공과대학 기계항공공학부 | - |
dc.date.awarded | 2015-08 | - |
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