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Low-Temperature Thermal Desalination (LTTD) Technology for Island Freshwater Production

Thermal Desalination
LTTD
Fresh Water
Island Water Supply
Low-Pressure Evaporation
Eco-friendly
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overview

The Low-Temperature Thermal Desalination (LTTD) technology uses natural ocean temperature gradients to evaporate warm surface seawater under low pressure and condense it using deep cold seawater, producing freshwater sustainably. Designed for islands with deep-sea access, LTTD is environmentally friendly, fully indigenous, and already deployed across multiple Lakshadweep Islands with proven long-term reliability.

  • 8

    TRL

  • 8

    Number of units currently deployed

  • 30

    No. of days or hours of training required

Key Features

  • High-capacity systems –1–1.5 lakh L/day with one year of O&M support.
  • Eco-friendly –Brine discharge <1% and no chemicals.
  • Indigenous –Robust, and suitable for island conditions, requiring 400 m depth within 1.5 km.

Functionality

Contact Us

Prof. Balaji Ramakrishnan

National Institute of Ocean Technology (NIOT), Velachery-Tambaram Main Road, Narayanapuram, Pallikaranai, Chennai

Email: director[at]niot[dot]res[dot]in

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