American Services Heating and Cooling Installation in Wentzville knows that in many climates and environments across the globe night temperatures drop even when daytime temperatures exceed economizer limits. “Night Precooling” technology allows the maintenance staff to take advantage of this resource. The air handler and economizer work together to push cooled night air through the system to cool down the building. The captured cool mass can then be recycled and used as a heat sink the next day.
Depending on the climate and location, control settings for night pre-cooling are critical and can save a significant amount of energy. Cost-saving studies have indicated a saving range of 5 percent in Arizona, to 80 percent in Colorado for the standard office building. Night pre-cooling has been found to reduce peak demand.
Cool storage utilizes cheaper off- peak energy and is normally only affective in upgrades where the local utility offers a critical peak pricing or bonus program. This technology cools storage unit while chiller operating cost is low, and then the medium is discharged when the chiller operating cost is high.
Most cool storage is custom built for a particular building but there are manufacturers that are producing package cool storage equipment.
Evaporative cooling is a cooling process which utilizes less than 25 percent the energy of standard vapor compression air conditioning systems. Simply put, air is blown over a wet surface. The surrounding air then evaporates moisture from the surface, resulting in a drop of temperature in the air. Technology has produced several types of evaporative coolers including:
– Direct Evaporative Cooler otherwise known as “swamp coolers”, these units evaporate moisture directly into the supply airstream, increasing its humidity. This type of evaporator cooler is suited for a dry climate, and is not effective in a humid environment.
-Indirect Evaporative Cooler
these units are used to cool the building supply air through a heat exchanger with a separate air stream cooled by a direct evaporative cooler. The supply air does not come into contact with the wet surface, so no moisture is added.
– Indirect/Direct Evaporative Cooler these evaporative coolers commonly called IDEC’s, cool the supply air first indirectly and then