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Old April 8th, 2009, 03:14 PM   #1
wjfox
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Empire State Building begins huge energy efficiency retrofit

http://cleantechnica.com/2009/04/06/...ency-retrofit/




Empire State Building begins huge energy efficiency retrofit

Building to cut energy consumption by nearly 40% in three years

Written by Timothy B. Hurst
Published on April 6th, 2009

Officials at New York’s Empire State Building today unveiled a new process for analyzing and retrofitting existing structures for environmental sustainability. As central elements of the $500 million upgrade program presently underway at New York City’s tallest building, the program is expected to reduce energy consumption by up to 38 percent, providing a replicable model for similar projects around the world.

The program is being spearheaded by former President Bill Clinton’s Clinton Climate Initiative, as well as the Rocky Mountain Institute, Johnson Controls Inc. and Jones Lang LaSalle.

“In this distressed economic climate, there is a tremendous opportunity for cities and building owners to retrofit existing buildings to save money and save energy,” said Mr. Clinton today at the announcement. “I’m proud of the work my foundation’s climate initiative has done with 40 of the world’s largest cities, including New York.”

On the outside, the building will get 6500 windows refurbished into triple-glazed insulated modules, dramatically improving summer and winter efficiency. On the inside, the 78 year-old building is getting upgraded lighting, lighting controls and lighting design; upgraded or overhauled furnaces, chillers, and air-handlers. There will also be an emphasis put on demand-side management systems, allowing tenants to use their energy efficiently.

“Commercial and residential buildings account for the majority of the total carbon footprint of cities around the world – over 70 percent in New York City,” said Anthony E. Malkin of building owner, Empire State Building Company. “Most new buildings are built with the environment in mind, but the real key to substantial progress is reducing existing building energy consumption and carbon footprint.”

With an initial estimated project cost of $20 million and additional alternative spending in tenant installations, the Empire State Building will save $4.4 million in annual energy savings costs, repaying its net extra cost in about three years.

Work has already commenced, and building systems work is slated to be completed by year-end 2010. The balance of the work in tenant spaces should be concluded by end of 2013.
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Old April 8th, 2009, 04:09 PM   #2
Major Deegan
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I hope this will be successful enough to inspire many more buildings to be insulated in America and so on.

However, I wonder why the cuts will be of "only" 40%. Wouldn't insulating the walls as well be part of the plan ?


To wrap up, the following energy efficiency efforts will be undertaken:
  • 1. Window Light Retrofit: Refurbishment of approximately 6,500 thermopane glass windows, using existing glass and sashes to create triple-glazed insulated panels with new components that dramatically reduce both summer heat load and winter heat loss.
  • 2. Radiator Insulation Retrofit: Added insulation behind radiators to reduce heat loss and more efficiently heat the building perimeter.
  • 3. Tenant Lighting, Daylighting and Plug Upgrades: Introduction of improved lighting designs, daylighting controls, and plug load occupancy sensors in common areas and tenant spaces to reduce electricity costs and cooling loads.
  • 4. Air Handler Replacements: Replacement of air handling units with variable frequency drive fans to allow increased energy efficiency in operation while improving comfort for individual tenants.
  • 5. Chiller Plant Retrofit: Reuse of existing chiller shells while removing and replacing “guts” to improve chiller efficiency and controllability, including the introduction of variable frequency drives.
  • 6. Whole-Building Control System Upgrade: Upgrade of existing building control system to optimize HVAC operation as well as provide more detailed sub-metering information.
  • 7. Ventilation Control Upgrade: Introduction of demand control ventilation in occupied spaces to improve air quality and reduce energy required to condition outside air.
  • 8. Tenant Energy Management Systems: Introduction of individualized, web-based power usage systems for each tenant to allow more efficient management of power usage.
More: Empire State Building Company
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