Economizers


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Economizers

A collection of mechanical devices that decide how much outside air to bring into a building to save energy versus using refrigeration equipment to cool recirculated air.
References in periodicals archive ?
Even if your facilities are in a warmer climate, you still have options for savings with an air-side economizer, says ENERGY STAR: "Because data centers must be cooled 24/7, 365 days per year, air-side economizers may even make sense in hot climates, where they can take advantage of cooler evening or winter air temperatures.
Finally, Figure 1 for the integrated economizer depicts the economizer heat exchanger piped on the chilled water side in series with the chillers (with a bypass) such that chilled water can flow first through the heat exchanger and then through a chiller; but the condenser water remains piped in parallel such that any one unit volume of condenser water flows through a heat exchanger or a chiller but not both.
The tests of the system are developed to help determining the most effective setup of the economizer as well as other required components (compressors, control system.
The fluid cooler size to meet the water economizer requirement is shown, as is the design cooling capacity for the systems that do not have air economizers (Non-Air Design Cooling Tons/kW).
The economizer damper was configured to be manually controlled using a 2-10 V variable DC voltage source to the motor.
A fluid economizer system is incorporated into a chilled water or glycol-based cooling system.
The fraction of room sensible and total design load experienced by the airside and the waterside systems of the building during those conditions is one of the most important variables that determines whether or not the waterside economizer can meet the entire cooling load at the 50[degrees]F dry bulb/45[degrees]F wet bulb (10[degrees]C/7.
Economizer high-limit controls and why enthalpy economizers don't work.
Sounds impressive, but do these economizers actually work?
78 cents per kW hour, could save $66,000 per year using free cooling, or $160,000 per year using a water-side economizer.
Side (rather than center) cores that allow air handlers to be located on each floor with access to the exterior walls for economizer outdoor air intake and relief.