Study Characteristics in Packed Tower of Liquid Desiccant Solar Cooling System Using Counter Flow Configuration
- Alternative Title
- 대향류를 이용한 흡수식 태양열 공조 시스템의 제습타워의 특성에 관한 연구
- Abstract
- High water vapour content in air can cause a number of problems as for human or surrounding materials. For human a high water vapour can create physiological stress, discomfort, and also can encourage ill health. While, the cause for the environment is can accelerate the corrosion of metals, accelerate the growth of spores and mould, can reduce the electrical resistance of insulators and etc.
Desiccant systems have been proposed as energy saving alternatives to vapor compression air conditioning for handling especially the latent load and also sensible load. Use of liquid desiccants offers several design and performance advantages over solid desiccants, especially when solar energy is used for regeneration. The liquid desiccants contact the gas inside the packed tower of liquid desiccant solar cooling system and the heat transfer and mass transfer will occur. This thesis is trying to study the characteristics inside the packed tower of dehumidifier systems. This characteristics consist of mass transfer rate, heat transfers rate, human comfort and energy that consume by the system. Those characteristics were affected by air flow rates, air temperature and humidity, and desiccant temperature and all that variation will influence the performance of the systems. The results of this thesis later on can be used to determine the best performance of the systems.
- Issued Date
- 2008
- Awarded Date
- 2010. 2
- Type
- Dissertation
- Publisher
- Pukyong national University Department of Refrigeration and Air Conditioning Engineering
- Affiliation
- Pukyong National University
- Department
- 대학원 냉동공조학과
- Advisor
- Kwang Hwan Choi
- Table Of Contents
- Contents i
List of Figures and Tables iii
Abstract vii
Chapter I. Introduction 1
1. 1. Background 1
1. 2. Developments 3
1. 2. 1. Mechanical Dehumidification 3
1. 2. 2. Chemical Dehumidification 6
1. 3. Objective of the study 8
1. 4. Structure of the thesis 9
1. 5. Science contribution of the thesis 10
Chapter II. Background Knowledge 11
2. 1. Reducing the Relative Humidity 11
2. 2. Dehumidification Methods 12
2. 2.1 Refrigerant Dehumidification 13
2. 2. 2 Air-cycle Dehumidification 15
2. 2. 3 Sorbent Dehumidification 15
2. 3 Sorbent 19
2. 3. 1 Desiccant 19
2. 4 Types of Desiccants 21
2. 4. 1 Solid Adsorbents 21
2. 4. 2 Liquid Absorbents 22
2. 5 Desiccant Life 23
2. 6 The Desiccant Cycle 24
2. 7 Desiccant Generally Used 26
Chapter III. Experimental Setup 35
3. 1 Experimental Apparatus 35
3. 1. 1 Dehumidifier Systems 35
3. 1. 2 Regenerator Systems 37
3. 2 Supporting Apparatus 39
3. 3 Measuring Apparatus 42
3. 3. 1 Data Acquisition System 42
3. 3. 2 Sensors 43
3. 4 Experimental Method 49
Chapter IV. Experimental Result and Data Analysis 51
4.1 Data Results 51
4. 2 Data Analysis 52
4. 2. 1 Mass Transfer Rate Analysis 52
4. 2. 2 Heat Transfer Rate Analysis 59
4. 2. 3 Human Comfort Analysis 63
4. 2. 4 Energy Analysis 76
Chapter V. Conclusions 79
5. 1 Conclusions 79
Acknowledgements 84
- Degree
- Master
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