marriott corporate headquarters john henderson marriott corporation
TRANSCRIPT
![Page 1: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/1.jpg)
Marriott Corporate Headquarters
John Henderson
Marriott Corporation
![Page 2: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/2.jpg)
Marriott Headquarters
• 1977 construction of ~700,000 square feet
• 1986 addition of ~300,000 square feet
• 8 floors including basement
• Office space operates 7 am to 6:30 pm
• Many areas at ~10% operation 24 hours a day, 7 days a week
![Page 3: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/3.jpg)
Marriott HeadquartersHVAC & Lighting Equipment in
1989
• One 900 ton & one 750 ton electric centrifugal– R-11 refrigerant, 0.86 & 0.92 kW/ton efficiencies– installed in 1977 with original building construction
• Two 450 ton chillers, 0.62 kW/ton, R-11, circa 1986• Two 1000 ton cooling towers• Two 350 horsepower gas boilers, 175°F hot water• ~12,000 fluorescent fixtures, two 40 watt U-tubes
each ~1800 assorted incandescent lamps & spots
![Page 4: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/4.jpg)
Marriott Headquarters Project Scenario
• Virtually no maintenance since 1977
• Half of plant didn’t work• Parts leaked, made noise• Not meeting safety
requirements• Not providing building
comfort
boiler room
![Page 5: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/5.jpg)
Marriott Headquarters“Before” Pictures
sample motor
air handler unit
![Page 6: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/6.jpg)
Marriott Headquarters Project Challenges
• Everything needed attention at once• Large budget for the wrong things• Set strenuous daily goals• Conserved energy wherever possible• Considered many new systems• Most work and analysis done in-house
![Page 7: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/7.jpg)
Marriott Headquarters System Solutions
• Short term, through 1994– cleaned up boiler room– rehabbed equipment - motors, boilers, piping,
air handlers, etc.– converted all chillers to R-123– increased cooling tower capacities to 1200
tons– added heat exchanger for free cooling– put electronic ballasts in lighting fixtures
![Page 8: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/8.jpg)
Marriott Headquarters System Solutions
• Long term, 1994 until today– two new traditional chillers, an ice chiller
and a gas/oil absorber– redesigned chilled water piping for more
effective primary/secondary loops– added window films– extensive rebalancing of air handlers– new motors added– new control system added
![Page 9: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/9.jpg)
Marriott Headquarters Variety of New Chillers
• One 670 ton electric centrifugal chiller – replaced 900 ton chiller– 0.53 kW/ton efficiency, R-123 refrigerant
• One 530 ton combination gas/oil-fueled absorber– replaces 750 ton chiller, used for peak shaving
![Page 10: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/10.jpg)
Marriott Headquarters Variety of New Chillers
• One ice chiller and storage system– converted from 450 ton chiller– 2400 tons of ice, or 350 tons of regular cooling,
0.68 kW/ton efficiency, R-123 refrigerant
• One 400 ton electric centrifugal chiller – replaced 450 ton chiller – 0.53 kW/ton efficiency, R-123 refrigerant
• Total of 1950 tons of total cooling capacity, versus 2550 tons previously
ice chiller
ice tank
![Page 11: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/11.jpg)
Marriott Headquarters Free Cooling
• Condenser water from cooling towers can bypass the chillers
• Cooling towers have variable frequency drives
• Up to 500 tons of cooling provided
• Used during mild weather in spring and fall
![Page 12: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/12.jpg)
Marriott Headquarters Cooling Load Reductions
• Replaced magnetic ballasts of fluorescent lighting with electronic ballasts
• Added tinted films to windows - block sunlight to reduce solar heat gain
• Complete balancing of air distribution system, including exhaust system
• EnergyStar printers - used sleep mode to reduce energy use
![Page 13: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/13.jpg)
Marriott Headquarters Cooling System Improvements
• Just finished adding new motors to air handlers- efficiency improved from 87-89% to
94-95%
• New EMS system- Andover 1986 model combined with
1994 model- computerized control, and help
deciding what systems to run when
![Page 14: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/14.jpg)
Marriott Headquarters Project Timeline
• New facility management in 1989• Plant clean-up began right away and
took 18 months• Plant retrofit work began in 1991• Lighting work in 1992• Window work & AHU balancing in 1994• New chillers installed in 1994
– 1 year of construction
• New AHU motors added in 1998
![Page 15: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/15.jpg)
Marriott Headquarters Financing Structure
• Won 1st place ENCOMP award in 1992 for large buildings - got us noticed
• $1 million from Maryland Public Service Commission through Washington Gas– paid for gas absorber
• $1 million rebate from Pepco – replaced one chiller, lighting retrofits, added
window films
• Sold one 450 ton R-123 chiller• Saved money by using in-house labor• Used almost no cash to finance the project
![Page 16: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/16.jpg)
Marriott Headquarters “After” Pictures
boiler room today
color coded piping
![Page 17: Marriott Corporate Headquarters John Henderson Marriott Corporation](https://reader036.vdocuments.site/reader036/viewer/2022081420/56649ee45503460f94bf31ec/html5/thumbnails/17.jpg)
Marriott Headquarters Project Results
• Safe, clean, highly efficient plant • Remarkable system innovation &
flexibility• Reduced peak cooling capacity• Much improved tenant/building comfort• No longer using CFC refrigerants
– first CFC conversion to R-123
• Saving 1.8 MWhrs of electricity per year