Three-Dimensional Double-Layer Multi-Stage Thermal Management Fabric for Solar Desalination

Area of Science:

• Materials Science
• Renewable Energy Engineering
• Environmental Science

Background:

• Water scarcity is a critical global challenge impacting human survival and development.
• Interfacial solar steam generation (ISSG) offers a sustainable solution for freshwater production through solar energy conversion.
• Conventional ISSG systems often suffer from significant heat losses, limiting their efficiency.

Purpose of the Study:

• To develop an efficient and durable evaporator for ISSG with improved thermal management.
• To enhance solar steam generation performance by minimizing heat losses and optimizing energy utilization.
• To address the limitations of current ISSG technologies for practical solar desalination.

Main Methods:

• Fabrication of a three-dimensional double-layer fabric evaporator (DLE) using hydrophilic Tencel yarn.
• Implementation of multi-stage thermal management strategies within the DLE structure.
• Utilizing airflow and structural engineering to enhance energy evaporation efficiency.

Main Results:

• The DLE achieved an evaporation rate of 2.86 kg·m^-2·h^-1 under 1 sun (1 kW·m^-2).
• Evaporation rate increased to 6.26 kg·m^-2·h^-1 with an applied wind speed of 3 m·s^-1.
• Demonstrated a stable average daily evaporation rate exceeding 8.9 kg·m^-2 and 99% metal ion removal from seawater over extended outdoor operation.

Conclusions:

• The developed DLE with efficient three-dimensional multi-stage thermal management shows high practicality for solar desalination.
• The innovative design effectively mitigates heat losses, leading to superior evaporation performance.
• This technology presents a promising advancement in addressing global water scarcity through sustainable solar energy.