What Is Large Scale Dew Collection?

It is a source of fresh water supply for plants & some animals in costal & inland desert areas.

Process

It envisages bringing cold sea water (15?C) from about 500 m depth & about 5 km from the shore, in plastic pipes, then it passes through a heat exchanger where it condenses about 643 cubic meter dew over a period of 24 hr. This pumping of sea- water is accomplished by three 200 KW wind machines.

Advantages
  • No energy is expended in evaporating the sea-water – The sea interaction takes care of that.
  • The dew collection is for 24 hr irrespective of day or night for the whole year as constant temperature is assured from source of sea-water.
  • After passing through the heat exchanger, the sea-water goes through ponds & helps in the growth of algae & fish production.
  • Then the water is reverted to sea & the natural resource is intact.
  • This scheme also points towards the possibility of using OTEC (Ocean Thermal Energy Conversions) as the generated fresh water can be transported to shore in huge plastic tankers which will float to the sea surface & can be shipped to the shore more economically, easily & with less energy expense.
REMARKABLE INNOVATION BY JAMANALAL BAJAJ AWARDEE 2001:

SHRI ANIL KUMAR RAJVANSHI
DIRECTOR NIMBKAR AGRICULTURAL RESEARCH INSTITUTE (NARI)
P.O. BOX 44, TAMBAL, PHALTAN-415 523
MAHARASHTRA
INDIA

Website: www.nariphaltan.virtualave.net