转轮除湿技术=Dehumidification Technologies Using Desiccant Wheels:英文

定价：99.90元

出版时间：2023-06

ISBN:9787502494506

Contents

Chapter 1 Dehumidification Mechanisms of Desiccant Wheels1

1.1Heat and moisture transfer mechanism in desiccant wheel1

1.2Properties of solid desiccants5

1.2.1Introduction of regular solid desiccants5

1.2.2Adsorption isotherms of solid desiccant materials7

References13

Chapter 2 Numerical Models of the Desiccant Wheel15

2.1Coupled heat and mass transfer equations15

2.1.1Working principles of desiccant wheels15

2.1.2TwoDimensionalDoubleDiffusion model16

2.1.3OneDimensionalDoubleDiffusion model18

2.1.4OneDimensionalNonDiffusion model19

2.2Validations of the mathematic models20

2.2.1Test bench20

2.2.2Validations21

2.3Dimensionless mathematic model29

2.3.1Dimensionless form29

2.3.2Main dimensionless criteria parameters31

2.4Prediction models of desiccant wheels33

2.4.1Value ranges of the 3 basic dimensionless numbers33

2.4.2Original data calculated from the dimensionless model35

2.4.3Prediction model using multiple regression method36

2.4.4Prediction model using artificial neural network method45

References53

Chapter 3 Lowering Regeneration Temperature of Desiccant Wheels56

3.1Exergy analysis of the desiccant wheel56

3.1.1Exergy balance for the rotary wheel56

3.1.2Exergy efficiency of dehumidification59

3.2Decreasing exergy destruction61

3.2.1Factors influencing heat and mass transfer exergy destruction62

3.2.2Influence of Ar and Fr on uniformity and exergy destruction66

3.3Decreasing thermal exergy obtained by the processed air73

3.3.1Factors influencing thermal exergy74

3.3.2Case studies77

3.4Conclusions79

References83

Chapter 4 Effects of Adsorption Isotherms and Rotation Speed on

Regeneration Temperature844.1The equilibrium isotherms of the desiccant wheel84

4.2Air dehumidification at high and low relative humidity85

4.3Effects of RS, C and Wmax on treg88

4.4Discussions98

4.5Conclusions105

References109

Chapter 5 Irreversible Processes of Dehumidification Systems with Single Stage Desiccant Wheel1105.1Performance analysis of a reversible DDCS110

5.1.1Introduction of the reversible DDCS111

5.2Performance analysis of the ventilation cycle120

5.3Performance improvement of the actual system126

5.4Conclusions134

References136

Chapter 6 Performance Influencing Factors of SingleStage Desiccant Wheel Dehumidification Systems1386.1Performance of the ventilation system138

6.1.1System description of BVS138

6.1.2Performances of BVS141

6.2Exergetic analysis of the ventilation system143

6.3Improved systems for the ventilation system149

6.4Conclusions161

References164

Chapter 7 Performance Analyses ofan Advanced System with SingleStage Desiccant Wheel1667.1Methodology166

7.1.1Working principles of the proposed dehumidification systems166

7.1.2Performance evaluation indexes170

7.2Comparisons of both systems based on energy consumptions172

7.3Comparisons of both systems based on exergy destructions175

7.4Sensitivity analysis of the advanced system182

7.5Conclusions188

References190

Chapter 8 Performance Analyses of Dehumidification Systems withMultiStage Desiccant Wheels1928.1Exergy analysis of multistage wheel system192

8.1.1Description of water and refrigerant driven systems192

8.1.2Performance indicators of the systems194

8.1.3Factors that influence exergy efficiency and ths195

8.2Key performance influencing factors197

8.3Design criterion of high efficiency multistage wheel considering

 the form of cold and heat sources200

systems210

References216

Chapter 9 Design Criterions of Dehumidification Systems with Different

Types of Heat Sources2179.1System description and performance indexes217

9.2Efficient configurations based on treg and Qh or COPlatent224

9.3Efficient configurations of Aratio and SN for different heat sources227

9.4Performance comparisons among different systems234

9.5Conclusions238

References240