Atmospheric Water Harvesting System Assisted by Desiccant Wheels

内容简介

In this book, a novel atmospheric water harvesting technology assisted by desiccant wheels is introduced and investigated. In Chapter 1, latest atmospheric water harvesting technologies in literature were summarized and the performances were compared. In Chapter 2, humidification mechanisms and numerical models of the desiccant wheel were presented. In Chapter 3, air humidification process using desiccant wheels as well as the effective thermal energy utilization configurations and strategies were investigated. In Chapter 4, performance analyses and optimizations of the desiccant wheel-assisted atmospheric water harvesting systems were carried out based on ideal thermodynamic cycles. In Chapters 5～6, performance of the system that combines multi-stage desiccant wheels were discussed using active and passive heating and cooling sources, respectively. In Chapter 7, performance analyses and optimization studies of such system were carried out under global ambient conditions. In Chapter 8, economic performance of the atmospheric water harvesting system were discussed when it is applied in humid climate regions.

目录

Chapter 1 Reviews of Atmospheric Water Harvesting Technologies

1.1 Atmospheric water harvesting using conventional technologies

1.2 Atmospheric water harvesting using other technologies

1.3 Performance limiting factors and solutions of atmospheric water harvesting technologies

1.4 Conclusions

References

Chapter 2 Working Principles of Desiccant Wheels used to Dehumidify or Humidify Air

2.1 Heat and moisture transfer mechanism in desiccant wheel

2.2 Numerical models of the desiccant wheel

2.3 Validations of the mathematic models

2.4 Conclusions

References

Chapter 3 Performance Analysis of Air Humidification Process Using Desiccant Wheels

3.1 Differences between humidification and dehumidification using desiccant wheels

3.2 Air handling process and configurations of the humidifier using desiccant wheels

3.3 Energy utilization forms of air humidification process using desiccant wheels

3.4 Conclusions

References

Chapter 4 Performance Analyses and Optimizations of Desiccant Wheels-Assisted Atmospheric Water Harvesting System Based on Ideal Thermodynamic Cycles

4.1 Theoretical analysis of the direct cooling water harvesting method

4.2 Performance analysis of humidification processes based on ideal desiccant wheels

4.3 Water harvesting performances using actual desiccant wheels

4.4 Performance comparisons with the DCWH system

4.5 Conclusions

References

Chapter 5 Performance Analyses of A New System for Water Harvesting from Moist Air that Combines Multi-Stage Desiccant Wheels and Vapor Compression Cycles

5.1 Introduction and analysis of the system’s humidifying module

5.2 System energy consumption analysis

5.3 Performance analysis with different heat pump systems

5.4 Optimal system configurations

5.5 Conclusions

References

Chapter 6 Performance Analysis of Desiccant Wheels-Assisted Atmospheric Water Harvesting System with Passive Heating and Cooling Sources

6.1 Introduction of atmospheric water harvesting system with passive heating and cooling sources

6.2 Performance evaluation index for AWHS with passive heating and cooling sources

6.3 Improvement of humidification process

6.4 Conclusions

References

Chapter 7 Performance Analyses and Optimization Studies of Desiccant Wheels-Assisted Atmospheric Water Harvesting System under Global Ambient Conditions

7.1 Introduction of two operation modes

7.2 Selection principle of the two operation modes

7.3 Analysis under global ambient conditions

7.4 Performances of the DW-WHS in typical climate zones

7.5 Conclusions

References

Chapter 8 Thermal and Economical Performances Analyses of a Desiccant Wheels-Assisted Atmospheric Water Harvesting System Used in Humid Climate Regions

8.1 Methodology

8.2 Thermal performance analyses under humid ambient conditions

8.3 Economic analyses of the system

8.4 Conclusion

References