Deep water source cooling (DWSC) or deep water cooling is a form of air cooling for cooling and cooling that uses a large body of naturally cold water as a heat sink. It uses water at 4 to 10 degrees Celsius drawn from deep areas within lakes, oceans, aquifers or rivers, which is pumped through the one side of a heat exchanger. On the other side of the heat exchanger, cooled water is produced.

Water is most dense at at standard atmospheric pressure. Thus 3.98 ° C and decreases in density and will rise. As the temperature climbs above 3.98 degrees Celsius, which is why they are warming up on the surface during the summer. The combination of these two effects is a constant 3.98 ° C.Air conditioners are heat pumps. During the summer, the temperature is higher than the temperature inside a building, air conditioners use electricity to transfer heat from the interior of the building to the warmer exterior ambience. This process uses electrical energy. Unlike residential air conditioners, most modern commercial air conditioning systems do not transfer heat directly into the air. The thermodynamic efficiency of the overall system can be improved by utilizing evaporative cooling, where the temperature of the cooling water is lowered to the wet bulb temperature by evaporation in a cooling tower. This cooled water then acts as heat sink for the heat pump. Deep lake water cooling uses water from the bottom of a lake as a heat sink for climate control systems. Because heat pump efficiency enhances the heat sink gets colder, deep lake water cooling can reduce the electrical demand of large cooling systems where it is available. It is similar in concept to modern geothermal sinks, but generally simpler to construct a suitable water source. Deep lake water cooling allows higher temperatures to be used, which is colder than the ambient wet bulb temperature. The higher efficiency results in less electricity used. For many buildings, the lake can be used for cooling and cooling of the air conditioning systems. This is referred to as “free cooling”, but is not actually free, One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity. which is colder than the ambient wet bulb temperature. The higher efficiency results in less electricity used. For many buildings, the lake can be used for cooling and cooling of the air conditioning systems. This is referred to as “free cooling”, but is not actually free, One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity. which is colder than the ambient wet bulb temperature. The higher efficiency results in less electricity used. For many buildings, the lake can be used for cooling and cooling of the air conditioning systems. This is referred to as “free cooling”, but is not actually free, One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity. The lake can be used to cool the environment and can be used to heat the environment. This is referred to as “free cooling”, but is not actually free, One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity. The lake can be used to cool the environment and can be used to heat the environment. This is referred to as “free cooling”, but is not actually free, One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity. but is not actually free, since pumps and fans run to circulate the lake water and building air. One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity. but is not actually free, since pumps and fans run to circulate the lake water and building air. One added attraction of deep lake water cooling is that it saves energy during peak load times, such as when it is sizable amount of electricity.

Deep water source cooling is very energy efficient, requiring only 1 of 10 Therefore, its running costs can be expected to be much lower. The energy source is very local and fully renewable, provided that the water and heat in the environment does not disturb the natural cycles. It does not use any ozone depleting refrigerant. Depending on the conditions and the water temperature, the couple can be considered. For example, heat could be extracted from the water (making it colder); and, secondly, that same water could be used for a more efficient production.

Deep water source cooling requires a large and deep water quantity in the surroundings. To obtain water in the 3 to 6 ° C (37 to 43 ° F) range, a depth of the required, depending on the local conditions. The set-up of a system is expensive and labor-intensive. The system also requires a large amount of material for its construction and placement.

Cornell University’s Lake Source Cooling System uses Cayuga Lake as a heat sink to operate the Ithaca City School District. The system has been operating at a cost of $ 55-60 million. It costs 14,500 tons (51 megawatt) load.

Since August 2004, Enwave Energy Corporation in Toronto, Ontario. It draws water from Lake Ontario through the tubes reaching the lake, reaching to a depth of. The deep lake water cooling system is one of the most important of these, and has a cooling power of 59,000 tons (207 MW). The system currently has enough capacity to cool office space. The water is drawn from the Lake of Ontario. The Enwave system only uses water to meet the needs of the water. Therefore, the Enwave system does not pollute the lake with a pen of waste heat.

Also known as Ocean Water Cooling. The InterContinental Resort and Thalasso-Spa on the island of Bora Bora uses a seawater air conditioning (SWAC) system to air-condition its buildings. The system accomplishes this by passing a cold exchanger where it cools freshwater in a closed loop system. This cool water is then pumped to buildings and is used for cooling directly. Hong Kong and Shanghai Banking Corporation main building in Hong Kong, and the Natural Energy Laboratory of Hawaii Authority. The InterContinental Resort is the largest seawater air conditioning system to date, but there are several other, larger systems being planned. Honolulu Seawater Air Conditioning is a project in the downtown Honolulu area. Pierre Omidyar’s Ulupono Initiative.

* Long Beach Press-Telegram, April 7, 2005, USING COLD SEAWATER FOR AIR-CONDITIONING