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	The Revolutionary Delta T Devices A Decade in Development 6 Prototypes, 5 modifications Tested at SDSU~ICATS Classification Delta T technology. Delta T devices are classed as a thermal based, atmospheric pressure, closed air loop, gas-vapor heating and cooling cycle desalination device(s) in which the change in temperature transfers water from the saline chamber to the potable water chamber, or condensation chamber of the unit and operates below the boiling point of water. It is thermo based, that is, it uses heat to desalinate, as opposed to a membrane which requires high pressure, typically 800psi for ocean water. To raise an acre foot of water to 800psi costs about $7000 in electricity at today's prices and the cost is rising as electric costs rise and and natural gas prices rise. Delta T devices require only a pump to move the hot water into the unit which needs no further pressure, no air pressure nor vacuum so, it ioperates at atmospheric pressure. They are closed air loop, so little surrounding air from the environment enters the unit, they don't need to warm or cool outside air, nor do they loose heat by venting large volumes of air to the outside. They are a gas-vapor heating and cooling cycle system which indicates they heat and cool the gas (atmospheric air and water vapor) inside the units. Lastly, they are a desalination devices, that is, they separate water from the solids dissolved therein. By definition, TDS is the fraction of water which is dissolved but which does not evaporate, this is how it is measured. They are called Delta T for the two Greek letters that are used to describe that it operates by changing (delta) the temperature (t, tau, or "T") of the atmospheric gas fraction inside the unit. The gas is warmed, rarified, and humidified by evaporated water, then cooled, condensed and gravimetrically enhanced by cooling this gas. Devices such as this are alternatively called H/D devices (Hydration/Dehydration) or E/C devices (Evaporation/Condensation). Both these descriptions are true here as well. Because the devices use a fully reversible thermodynamic process, they are efficient at producing water using hot water, not steam, and, because it is not a membrane based system, water can be produced in large qualities to offset, and eventually reverse, the effects of current and past water management practices. All scientific laws are based on the laws of thermodynamics. A reversible thermodynamic process is the most efficient process that can be described by science. Yanniotis and Xerodemas, described a similar process, but a completely different device in Desalination in 2003.	Navigation WWA Home Strident Home What we do Where can we do this? U.S. Dept. of Energy Maps US Maps SMU Geothermal Maps, U.S.A. The Need The Company Delta T The Process Volumetrics Library Brochures & presentations Geothermal Desalination Geothermal Energy Water Quality Laguna Salada Laguna Salada Clickable Image Map Panoramas of the lagoon Contact Us
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World Wide Assets LLC

Sustainable Development

The Revolutionary Delta T Devices

A Decade in Development

6 Prototypes, 5 modifications

Tested at SDSU~ICATS

Classification

Delta T technology.

Delta T devices are classed as a thermal based, atmospheric pressure, closed air loop, gas-vapor heating and cooling cycle desalination device(s) in which the change in temperature transfers water from the saline chamber to the potable water chamber, or condensation chamber of the unit and operates below the boiling point of water.

It is thermo based, that is, it uses heat to desalinate, as opposed to a membrane which requires high pressure, typically 800psi for ocean water. To raise an acre foot of water to 800psi costs about $7000 in electricity at today's prices and the cost is rising as electric costs rise and and natural gas prices rise.

Delta T devices require only a pump to move the hot water into the unit which needs no further pressure, no air pressure nor vacuum so, it ioperates at atmospheric pressure.

They are closed air loop, so little surrounding air from the environment enters the unit, they don't need to warm or cool outside air, nor do they loose heat by venting large volumes of air to the outside.

They are a gas-vapor heating and cooling cycle system which indicates they heat and cool the gas (atmospheric air and water vapor) inside the units.

Lastly, they are a desalination devices, that is, they separate water from the solids dissolved therein. By definition, TDS is the fraction of water which is dissolved but which does not evaporate, this is how it is measured.

They are called Delta T for the two Greek letters that are used to describe that it operates by changing (delta) the temperature (t, tau, or "T") of the atmospheric gas fraction inside the unit. The gas is warmed, rarified, and humidified by evaporated water, then cooled, condensed and gravimetrically enhanced by cooling this gas. Devices such as this are alternatively called H/D devices (Hydration/Dehydration) or E/C devices (Evaporation/Condensation). Both these descriptions are true here as well.

Because the devices use a fully reversible thermodynamic process, they are efficient at producing water using hot water, not steam, and, because it is not a membrane based system, water can be produced in large qualities to offset, and eventually reverse, the effects of current and past water management practices.

All scientific laws are based on the laws of thermodynamics. A reversible thermodynamic process is the most efficient process that can be described by science. Yanniotis and Xerodemas, described a similar process, but a completely different device in Desalination in 2003.