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CALMAC Renovates 1500 Walnut Street HVAC System with IceBank Tanks for Demand Response
Fair Lawn, N.J. – March 5, 2013 – CALMAC, a leader in energy storage systems, today announced the installation of its thermal energy storage tanks at 1500 Walnut Street, a 22-story, 270,000 square foot high-rise commercial building located in Philadelphia. Facing a failing HVAC system and declining tenant satisfaction, CALMAC’s IceBankŪ tanks and two 300-ton chillers were installed. The new tanks are assisting in saving 1500 Walnut Street $40,000 in energy costs per month during the warmer months and generating an additional $10,000 of revenue per year. The upgrades have helped turn the building into a “virtual power plant,” prepared it for the smart grid and was installed at the same cost of the existing outdated system.

“The system we had in place was an energy hog that was affecting bottom-line revenue for the owner,” said Gene O’Donnell, the building manager at 1500 Walnut. “There was no question we needed a new system, but we also couldn’t burden the tenants while we installed it.”

The new thermal energy storage system, which was installed at the recommendation of Tozour Energy Services for the same cost of the existing outdated system, allows ice to be created at night, when power is less expensive and generated more efficiently. It is then used the next day to cool the building during peak demand hours, which has significantly reduced operating costs. The thermal energy storage tanks were also paired with Viridity Energy’s VP Power software to provide additional flexibility. With this upgrade to the building controls, CALMAC’s tanks are able to function as a part of a real-time demand response system that utilizes data from the utility company.

“Viridity Energy can forecast where prices due to congestion will be for the next day on an hour-by hour basis and provide a schedule to the building operator through the building automation system, which the ice system is tied into to make ice or burn ice,” said H.G. Chissell, vice president, NE region and strategic accounts at Viridity Energy. “When they are using ice they are not using their chillers and their load drops. We can then make sure that the grid operator knows that this load is dropping during these hours and they don’t have to go to a power plant. The grid operator diverts the income or the money to the building.”



“1500 Walnut has turned into a ‘virtual power plant’,” said Mark MacCracken, CEO of CALMAC. “If the utility company can pay a building to reduce their load at a cheaper price than it costs them to generate the extra electricity, they would much rather do that. It becomes a win-win for the building and the utility company.”

When referring to the additional revenue O’Donnell added, “We don’t need one square foot of space in this building to make this money, and the tenants in this building see no change at all. We’re as happy as pigs in mud. The system works."


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Published 2013-03-08 00:00:00 
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