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Technology at work in your facility boilers:chillers

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Technology at work in your facility boilers:chillers

  1. 1. High Performance Buildings: Chiller Efficiency Ideas
  2. 2. Achieving Superior Performance for Life2 • Russ Phillips is a System Sales Engineer for Trane and is responsible for developing and delivering building modernization and improvement services and solutions. • Russ has been with Trane for 11 years and has been in various sales and leadership roles within the organization. • He earned a bachelor’s degree in mechanical engineering from the University of Missouri. He is also a registered professional engineer (PE). My Background
  3. 3. Achieving Superior Performance for Life3 • Dedicated Heat Recovery Chillers • Ice Storage Our Agenda
  4. 4. Achieving Superior Performance for Life4 •Simultaneous Chilled and Hot Water •Easy Addition to any Hydronic System •One to Four Year Payback •75% Reduction in CO2 Emissions •10 Tons to 1000 Tons •Hot Water Temps as high as 180°F DEDICATED HEAT RECOVERY CHILLERS
  5. 5. Achieving Superior Performance for Life5 Dedicated Heat Recovery Chiller 55F45F 120F130F Where to Apply •VAV Reheat •Domestic Hot Water •Low Temperature Heating Cooling Load Heating Load $0.10/Therm 1.6 Kg CO2 per Therm $1.11/Therm 5.9 Kg CO2 per Therm
  6. 6. Achieving Superior Performance for Life6 Scenario 1: Chiller and Boiler both running Chiller Cooling = 0.6 kw/Ton @ $0.10/kwh = $0.51/100 MBTU Boiler Heating = $1.00 THERM Natural Gas @ 80% Efficiency = $1.25/100 MBTU Total = $1.76 Dedicated Heat Recovery Chiller
  7. 7. Achieving Superior Performance for Life7 Scenario 2: Boiler both running, Airside Economizer Economizer Cooling = Free (outside air) Boiler Heating = $1.00 THERM Natural Gas @ 80% Efficiency = $1.25/100 MBTU Total = $1.25 Dedicated Heat Recovery Chiller
  8. 8. Achieving Superior Performance for Life8 Scenario 3: Dedicated Heat Recovery Chiller HR Chiller Cooling = @0.85 kw/Ton @ $0.10/kwh = $0.71/100 MBTU HR Chiller Heating = 125 MBH of Free Heat Total = $0.71 » 60% savings versus scenario 1 » 43% savings versus scenario 2 Dedicated Heat Recovery Chiller
  9. 9. Achieving Superior Performance for Life9 Ice Storage
  10. 10. Achieving Superior Performance for Life10 Travel Cooling •Oversized for Most Use •Plenty Horsepower •Anytime Utility •Expensive to Operate •Oversized for Most Use •Plenty Tons or Refrigeration •Anytime Cooling •Expensive to Operate The Conventional Way…
  11. 11. Achieving Superior Performance for Life11 Hybrid Travel Hybrid Cooling •“Right” Sized Engine - handles load efficiently most of the time •Electric motors – kick in when extra power is needed •Battery – charged when plugged in or braking •“Right” Sized Chillers - handle load efficiently most of the time •Energy Storage – kick in when extra cooling is needed •Storage Tanks – are efficiently charged at night when costs are low. Today… +
  12. 12. Achieving Superior Performance for Life12 What’s a chiller’s electricity cost/ton to operate for 1 summer month ? • Electric Rate – Energy Charge = $0.07/kwh – Demand Charge = $12/kw • Chiller Assumptions – 10 EER = 1.2 kw/ton – Full load hours = 8 hrs/day x 5 days/week x 4 weeks/month = 160 • Energy Consumption Costs – 1.2 kw x 160 hrs x $0.07/kwh = $13.44 • Demand Costs – 1.2 kw x $12/kw = $14.40 • Demand = 14.40/(14.40 + 13.44) = 52% of the electric bill
  13. 13. Achieving Superior Performance for Life13 What’s the Battery Look Like? 1190C2F Around 20 tons of cooling for 8 hours 3 Model 1500C2F’s Around 180 tons of cooling for 8 hours 1190C2F - Requires less than 1% of conditioned space - 40 + year life - No mechanical fittings - 10 year standard warranty; 20 years available - 100% NON corrodible materials
  14. 14. Achieving Superior Performance for Life14 Ice Storage Example • Peak Cooling Load: 400 tons • Conventional Chiller Plant Design – Air cooled chillers  Qty 1 – 400 ton chiller • Ice Storage Plant – Air cooled chiller  Qty 1 – 240 ton chiller  1,200 ton-hours ice storage
  15. 15. Achieving Superior Performance for Life15 Design Day Cooling Load Profile 0 50 100 150 200 250 300 350 400 450 Cooling Load Ice Storage Example
  16. 16. Achieving Superior Performance for Life16 0 50 100 150 200 250 300 350 400 450 Ice Burn Chiller To Ice Chiller To Load Plenty of time to re charge the battery! Typically use 6 to 12 hours! 40% load shift Design Day Cooling Load Profile Ice Storage Example
  17. 17. Achieving Superior Performance for Life17 0 100 200 300 400 500 Ice Burn Chiller To Ice 40% load shift Demand Savings: $12/kw x 160 tons x 1.2 kw/ton x 6 months = ~$14,000 per year Design Day Cooling Load Profile Ice Storage Example
  18. 18. Achieving Superior Performance for Life18 Russ Phillips System Sales Engineer Tennessee District Trane 901-230-0468 rjphillips@trane.com Contact Information

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