1986•Energy User News; (United States)Requires access
Energy use held steady without EMS
G. Ponczak
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Abstract
A Chicago bank was able to maintain energy efficiency despite a computer breakdown of its energy management system. Plans to install a digital EMS will limit demand but will leave some equipment for manual control because of skepticism over the effectiveness of digital over pneumatic systems. The bank plans to operate the old and new controls in parallel to compare their cost effectiveness. The energy manager argues that they can make a good estimate of the most efficient time to start equipment, although they will not be as accurate as the computer in optimal start and stop functions. The new system should lower electricity cost in the all-electric building by $10,000 a month, mostly from savings in demand charges.