ASHRAE Handbook--HVAC Applications (2011) provides several high-limit controls for economizer
operations, as demonstrated in Figure 1, including fixed or differential enthalpy with the high-limit curve of Line 1 and the economizer
zones of A and C, fixed or differential dry-bulb temperature with the high-limit curve of Line 2 and the economizer
zones of A and B, and a combination thereof with the high-limit curve of Line 3 and the economizer
zone of A only, all of which consider climate zones and availability of humidity measurements.
The Hitec Economizer
has already proved its effectiveness.
Grand Caravan features a segment-exclusive fuel economizer
mode and gets up to 25 miles per gallon, or up to 500 miles driving range.
This White paper provides a unique insight into operating Cooling modules in economizer
mode in a manner that doesn't compromise on efficiency or availability.
For this heat economizer
, we have the differential thermic equation
The method only requires single-point temperature measurements for mixed, return, outdoor, and supply air that are already typically available for diagnostics and economizer
A fluid economizer
system is incorporated into a chilled water or glycol-based cooling system.
Stetz will explain how to identify seemingly imperceptible failures of economizers
used in commercial building air handlers and rooftop units to save money.
5 mw condensing economizer
smoke in the acquisition and installation of the boiler house purchase silk.
In this diagram, the chillers are labeled CH-1 through CH-5, the water-side economizer
heat exchangers are labeled HX-1 to HX-5, and the variable primary pumps are labeled P-1 to P-5.
EDF Climate Corps fellow Mike McCarthy, an MBA candidate at Duke University's Fuqua School of Business, worked this summer at AT&T to evaluate economizer
operations across AT&T facilities in the United States.
Soundview Plaza was recognized for the ENERGY STAR award through monthly physical systems checklists, the installation of T-8 lamps and electronic ballasts throughout office and parking garage spaces, electronic emergency lighting, and the use of the Economizer
system, which uses outside air whenever possible and helps to minimize the need for mechanical heating and cooling of the building.