=Msradell
An air conditioner should be able to return here about 20° cooler than the air it takes in, not than the outside temperature.
It's 92 here today my discharge is 60 degrees the return is 75. 15 degrees. The same as it is when the temp is 80 deg outside.
If you don't think it's true just go to Las Vegas in the heat of the summer. It's 110°+ outside yet inside is extremely cool
You can bet they aren't using freon based mechanical air conditioning. They Probably are using Absorption Liquid Chillers. These chillers can supply 40-45 degree liquid coolant to any number of air handling units to overcome the heat in Las Vegas.
quote:
Absorption chillers use heat to drive the refrigeration cycle, they produce chilled water while consuming just a small amount of electricity to run the pumps on the unit. Absorption chillers generally use steam or hot water to drive the lithium bromide refrigeration cycle but can also use other heat sources.
Most likely Direct-fired absorption chillers that offer customers a choice in how they consume energy to produce chilled water. The chiller uses natural gas or other fuels to fire the absorption refrigeration cycle.
A direct-fired absorption chiller can be used as a primary component for hybrid plants or other applications where electrical demand and consumption are expensive or in short supply.
The efficiency of the double-effect cycle used in these chillers makes them competitive with electric chillers in many regions of the world where electricity prices have risen dramatically over the last decade.
All sizes also can act as a chiller/heater to supply chilled or hot water for conditioning the building during the summer or winter.