Energy Efficiency in Hospitals

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Hospitals represent 6% of the total energy consumption in the utility buildings sector. The webinar analyses the use of energy, benchmark methodologies and the potential energy savings in the hospital sector, on the basis of theory and practical case studies.

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Energy Efficiency in Hospitals

  1. 1. Energy efficiency in hospitals Rob van Heur (rob.vanheur@laborelec.com) Marcel Didden (marcel.didden@laborelec.com) From innovation to operational assistance LABORELEC
  2. 2. Content 1. Introduction 2. HVAC 3. Compressed air 4. Steam 5. Lighting 6. Cogeneration 7. Summary LABORELEC www.leonardo-energy.org www.laborelec.com
  3. 3. Introduction LABORELEC www.leonardo-energy.org www.laborelec.com
  4. 4. Who is Laborelec ? Technical competence center and laboratory within GdFSuez • Métier = Electrical Power – Power generation / T&D / energy end-use • 230 researchers and technical specialists – Growing +15%/year Applied research and technical assistance • Turnover 38 MEUR – Strong growth International • For shareholders and third party customers – 20% of turnover outside GdFSUEZ • Innovation for Value Creation • Focused on Sustainable Energy Technology LABORELEC www.leonardo-energy.org www.laborelec.com
  5. 5. Hospital Energy balance Other 22% Kitchen Heating 4% 43% Cooling 5% Lighting 21% Hot water 5% LABORELEC www.leonardo-energy.org www.laborelec.com
  6. 6. Benchmarking hospitals Based on m2, beds or overnight stays Cannot be compared without interpretation Level of outsourcing : kitchen / laundry Hospital type : academic, regional Construction year Definition of m2 : parking deck Definition of beds Heat Electricity Energy consumption per m² 262 MWh/m2/year 113 MWh/m2/year Energy consumption per bed 25 235 MWh/m2/year 10 944 MWh/m2/year LABORELEC www.leonardo-energy.org www.laborelec.com
  7. 7. Heating, Ventilation Air conditioning LABORELEC www.leonardo-energy.org www.laborelec.com
  8. 8. HVAC General 50% of the energy consumption Most applied energy saving measures Fitting frequency controllers on the fans Recovering heat from the extraction air Optimising the running hours Optimising the temperature and humidity LABORELEC www.leonardo-energy.org www.laborelec.com
  9. 9. Case Study : Ventilation in polyclinic Current situation Ventilation 24/7, operation only at office hours Proposal Reduce to 50% outside office hours Savings 1200 euro annually Investment / Payback time No investment LABORELEC www.leonardo-energy.org www.laborelec.com
  10. 10. Case Study : Ventilation in polyclinic • Period of reduced setting : 9 h/day • Electricity consumption saving (ventilator fans) : 10 MWhe • Degree hours on basis of 17°C : 21 577 hK/a • Gas consumption saving (heating) : 7.6 MWhth • Number of humidification gram-hours : 1 437 h/a*g/kg • Assumed efficiently of steam generation + transport : 90 % • Gas consumption saving (steam) : 5.1 MWhth/year LABORELEC www.leonardo-energy.org www.laborelec.com
  11. 11. Compressed air LABORELEC www.leonardo-energy.org www.laborelec.com
  12. 12. Compressed air General Two functions Medical Legal requirements from EN-12021 E.g. redundancy of equipment Technical Comparable to industry LABORELEC www.leonardo-energy.org www.laborelec.com
  13. 13. Case Study : Splitting up networks Current situation Technical and medical combined Proposal Separate both functions, install VSD Savings 7 200 euro annually Investment / Payback time 44 000 euro (payback time : 5.5 years) LABORELEC www.leonardo-energy.org www.laborelec.com
  14. 14. Case Study : Split compressed air networks Lowering the pressure of the technical compressed air: • Annual consumption of technical compressed air : 820 000 Nm3/year • Specific energy consumption at 11 bar : 0.158 kWh/Nm3 • Specific energy consumption at 6 bar : 0.107 kWh/Nm3 • Energy saving achieved by lowering the pressure : 42 MWh/year Installing compressors with frequency regulation: • Zero-load energy consumption with respect to total consumption : 25 % • Consumption savings for 11 bar network at zero load : 5.5 MWh/year • Consumption savings for 6 bar network at zero load : 21.5 MWh/year • Total energy saving achieved by frequency regulation : 27 MWh/year Savings on compressed air treatment: • Total energy consumption for compressed air : 152 MWh/year • Energy consumption of absorption air drying, as a percentage of : 25 % the total compressed air energy consumption • Energy consumption of standard air drying, as a percentage of the : 5% total compressed air energy consumption • Present energy consumption for drying : 30.5 MWh/year • New energy consumption for drying of the 11 bar network : 5.6 MWh/year • New energy consumption for drying of the 6 bar network : 4.4 MWh/year • Energy saving : 20.5 MWh/year LABORELEC www.leonardo-energy.org www.laborelec.com
  15. 15. Steam LABORELEC www.leonardo-energy.org www.laborelec.com
  16. 16. Steam General Steam from boiler Net steam Steam to degasser Losses Condensate Air return Economiser Air Preheater Condensor Feed Water Make-up water Bleed Preheated air LABORELEC www.leonardo-energy.org www.laborelec.com
  17. 17. Case Study : Directly fired hot tap water Current situation Hot tap water by steam Proposal Heat it directly Savings 2340 euro annually Investment / Payback time 10 500 euro, payback time 4.5 years LABORELEC www.leonardo-energy.org www.laborelec.com
  18. 18. Case Study : Directly fired hot tap water The savings are determined as follows: •Hot water consumption : 100 m3/week •Hot water temperature : 70 °C •Water supply temperature : 10 °C •Estimated efficiency of steam circuit (boiler + transport) : 81% •Present energy consumption per year for hot water : 450 MWh/year •Efficiency of directly fired condensing boiler : 98 % •Energy savings per year : 78 MWh/year LABORELEC www.leonardo-energy.org www.laborelec.com
  19. 19. Lighting LABORELEC www.leonardo-energy.org www.laborelec.com
  20. 20. Lighting General 58W conv. electr. 36W conv. electr. 18W conv. electr. Lamp consumption 11W conv. Ballast consumption electr. 0 20 40 60 80 100 LABORELEC www.leonardo-energy.org www.laborelec.com
  21. 21. Case Study : Replacing conventional balasts Current situation Conventional ballast Proposal Replace by electronic ballasts Savings 37 000 euro Investment / Payback time Payback time : 6-9 years LABORELEC www.leonardo-energy.org www.laborelec.com
  22. 22. Case Study Lighting • Total energy consumption of the lighting : 2 400 MWh/year • Power consumed by fluorescent tube lighting (90%) : 2 160 MWh/year • Losses in conventional ballasts : 20 % • Percentage of light sources with conventional ballasts : 70 % • Estimated number of fluorescent light sources with : 4 000 conventional ballasts, on the basis of 58 W per tube • Total energy consumption of conventional fluorescent : 1 780 MWh/year lights • Potential savings by fitting electronic ballasts and efficient : 26 % optics • Total savings potential : 462 MWh/year LABORELEC www.leonardo-energy.org www.laborelec.com
  23. 23. Cogeneration LABORELEC www.leonardo-energy.org www.laborelec.com
  24. 24. Cogeneration General Continuous demand of heat Sterilisation Humidification Hot tap water Integrated in Backup power system Application in Hospitals Try to avoid cogeneration for electrical peakshaving Cogen/absorption cooling is not always interesting Annual profile 20,00% 13,50% 12,90% 12,40% 18,00% 11,20% 10,80% 16,00% 14,00% 9,00% 7,50% 12,00% 6,10% 10,00% 4,90% 4,50% 3,60% 3,60% 8,00% 6,00% 4,00% 2,00% 0,00% November June January July March September October December February May April August LABORELEC www.leonardo-energy.org www.laborelec.com
  25. 25. - Other saving measures - Summary LABORELEC www.leonardo-energy.org www.laborelec.com
  26. 26. Other efficiency gains Small operational measures Variable Speed Drives Isolation Use of surgery tools : electrical or with compressed air Sterilisation : electrical or with steam Humidification : electrical or not Looking within the value chain Suppliers of electric material Efficiency of emergency system LABORELEC www.leonardo-energy.org www.laborelec.com
  27. 27. Summary Energy efficiency in existing hospitals Good housekeeping Operational and low cost modifications 2-5% reduction Replacement (lamps, heat recovery) : payback time > 5 years Further within the value chain New hospitals Use best practices Heat recovery Energy efficient lighting LABORELEC www.leonardo-energy.org www.laborelec.com
  28. 28. Rob van Heur (rob.vanheur@laborelec.com) Marcel Didden (marcel.didden@laborelec.com) From innovation to operational assistance LABORELEC

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