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  • Economizer
    The function of the economizer is as its name implies, to economize or save on cooling costs. Obviously, it costs money to operate the compressor. If the compressor can be shut down and the system still provide adequate cooling, energy savings can be realized. Heat internal to the building
  • White Paper: Computer Cooling Using Economizers and Free Cooling
    specifically in air economizers. be overcome?. • What energy savings can be expected for different types of economizers?. 1. Introduction. compressor operation in Computer Room. Air Conditioning (CRAC) units. This enables. Interest in using economizer systems to. economizer systems to lower energy
  • WP #132: Economizer Modes of Data Center Cooling Systems
    In certain climates, some cooling systems can save over 70% in annual cooling energy costs by operating in economizer mode, corresponding to over 15% reduction in annualized PUE. However, there are at least 17 different types of economizer modes with imprecise industry definitions making
  • WP #132: Economizer Modes of Data Center Cooling Systems
    In certain climates, some cooling systems can save over 70% in annual cooling energy costs by operating in economizer mode, corresponding to over 15% reduction in annualized PUE. However, there are at least 17 different types of economizer modes with imprecise industry definitions making
  • WP #136: High Efficiency Economizer-based Cooling Modules for Large Data Centers
    When a cooling plant operates in economizer mode, high energy-consuming mechanical systems can be turned off. A standardized, modular cooling plant designed to operate primarily in economizer mode not only reduces costs but also improves predictability and flexibility. This paper shows a new
  • WP #136: High Efficiency Economizer-based Cooling Modules for Large Data Centers
    When a cooling plant operates in economizer mode, high energy-consuming mechanical systems can be turned off. A standardized, modular cooling plant designed to operate primarily in economizer mode not only reduces costs but also improves predictability and flexibility. This paper shows a new
  • Selecting and Controlling Economizer Dampers for VAV Systems with Return Fans (.pdf)
    For over 20 years the generic method of maintaining the prescribed amount of outdoor ventilation air has been through the use of a supply-return fan tracking system. The latest draft of ASHRAE Standard 62-1989R requires "controls and devices to maintain outdoor air flow within 10% of required
  • Minnesota School Boiler Economizer Retrofit Saves Thousands of Dollars.
    In 2011 Minnetonka School District received a grant to upgrade the boiler efficiency at seven local schools built in the 1960s. All the schools had very similar boiler systems consisting of Kewanee 5000 series boilers, Model 5187, an atmospheric boiler capable of firing 2,520MBH to 8,400MBH natural

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