Atmospheric water harvesting (AWH) is an effective approach to addressing freshwater resource scarcity. Due to its high periodic regeneration capability, AWH can continuously replenish lost water without disrupting the atmospheric water balance and have minimal negative impact on the environment. AWH methods can be categorized into various types, all of which share similar core principles. Each method possesses unique characteristics, advantages, and disadvantages. Consequently, users seeking suitable AWH solutions often face challenges in selecting the most appropriate method based on their specific conditions, as there are currently no definitive selection criteria. In this paper, five commercially available AWH methods are reviewed in detail, and the performance of three representative methods is analyzed under varying climate conditions using numerical simulations. A comprehensive analysis of the water production and energy efficiency ratios of these methods is conducted, resulting in recommendations for selecting AWH methods tailored to various climatic conditions and seasonal variations. Based on these simulations results, cloud maps illustrating the water production and energy efficiency ratios across major regions of China for each season are generated, providing insights into the applicable regions and seasonal suitability of various AWH methods.

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Theoretical Energy Efficiency Analysis of Various Atmospheric Water Harvesting Methods

  • Ke Zhang,
  • Zheng Cao,
  • Jianqiang Deng,
  • Linrui Jia,
  • Lin Lu

摘要

Atmospheric water harvesting (AWH) is an effective approach to addressing freshwater resource scarcity. Due to its high periodic regeneration capability, AWH can continuously replenish lost water without disrupting the atmospheric water balance and have minimal negative impact on the environment. AWH methods can be categorized into various types, all of which share similar core principles. Each method possesses unique characteristics, advantages, and disadvantages. Consequently, users seeking suitable AWH solutions often face challenges in selecting the most appropriate method based on their specific conditions, as there are currently no definitive selection criteria. In this paper, five commercially available AWH methods are reviewed in detail, and the performance of three representative methods is analyzed under varying climate conditions using numerical simulations. A comprehensive analysis of the water production and energy efficiency ratios of these methods is conducted, resulting in recommendations for selecting AWH methods tailored to various climatic conditions and seasonal variations. Based on these simulations results, cloud maps illustrating the water production and energy efficiency ratios across major regions of China for each season are generated, providing insights into the applicable regions and seasonal suitability of various AWH methods.