发表于:2007-11-20 15:59:00
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Skorpion Switches Help Keep Efficiency Under Control
Due to overall lifetime costs of one of Chicago's downtown structures, the customer implemented a plan to upgrade the 500,000 sq ft building three years ago. The redesign process was in an effort to save energy, facilities maintenance, and personnel costs. The return-on-investment was achieved by installing a dedicated building automation network using Contemporary Controls' industrial-grade Ethernet Skorpion switches, eliminating the hard to maintain outdated existing DDC system. Contemporary Controls is an industrial networking manufacturer located in Downers Grove, IL, specializing in Ethernet switches marketed under the trade name CTRLink®.
Roland Gutknecht, Director of Customer Ser vice at Environmental Systems of Chicago in Chicago, IL, said it was time to renovate the system. "The project involved complete facility management, including all HVAC plant and terminal controls, lighting, access control, video, fire alarming monitoring, energy metering and reporting employing LonWorks, Modbus, BACnet, and SMTP protocols through HTTP," explained Gutknecht. "After reviewing all the options, the customer decided on the Niagara Framework to monitor and control the system via BACnet over IP for the devices and systems. The framework is 100% open; a requirement that had to be met. In addition, more than 80% of the building's motors were replaced as well as converting to variable-frequency drives (VFDs). This enabled a huge energy savings." Gutknecht further added that cooling and heating systems were updated which resulted in more energy conservation. These systems were joined into the BAS so engineers can make any essential repairs in case of an alarm. In addition to e-mail alarming, Environmental Systems of Chicago implemented automatic fault detection & diagnostic rules to notify engineers of a deteriorating or energy wasting mode of operation for their central plant equipment.
"And Contemporary Controls' Skorpion switches made the difference," said Gutknecht. "They solved the problem. Our original switches did not support cascading, and there were many missed messages and packet losses. The Skorpion switches support cascading, but more importantly, Contemporary Controls' technical su