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Energy Saving in Hospitals: Hong Kong Initiatives P L Yuen 14 May 2011.

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Presentation on theme: "Energy Saving in Hospitals: Hong Kong Initiatives P L Yuen 14 May 2011."— Presentation transcript:

1 Energy Saving in Hospitals: Hong Kong Initiatives P L Yuen 14 May 2011

2 Content (A)Background (B)Energy Saving Strategy (C)Energy Saving Achievements (D)Sustaining Energy Saving 2

3 (A) Background

4 Purposes of Energy Saving Protect environment Cut down energy use and save money Minimize health threats with less harmful emission Project positive corporate image 4

5 Energy use from Hospital Building operation Use of energy for: - air conditioning and ventilation - lighting and electrical power - Steam and hot water Energy source included: - Electricity - Town Gas and Liquified Petroleum Gas (LPG) - Diesel fuel 5

6 Hospital Energy Consumption Level SourceUsage Annual Energy Expenditure* Electricity Air Conditioning, Lighting & Power $692M (83%) Town Gas and Liquified Petroleum Gas Hot Water & Steam$108M (13%) Diesel Fuel Hot Water, Steam & Emergency Power $37M (4%) Total$837M (100%) 6 * 2009/10 figures

7 Hospital Electricity Consumption Distribution 7

8 (B) Energy Saving Strategy

9 Energy Saving Strategy Energy Demand Side Management − Actions taken to influence the quantity and pattern of use of energy in hospitals Energy Supply Side Management − Selection of energy source and switch fuels 9

10 Energy Demand Side Management Hospital Building Envelope Hospital Engineering Systems 10

11 Energy Demand Side Management - Hospital Building Envelope Overall Thermal Transfer Value (OTTV) Control - reduce overall building solar heat gain (e.g. Low shading coefficient glass, sunshades, recessed windows, etc.)   Planting & Roof Garden - reduce roof solar heat gain and create better patient healing environment   11

12 Energy Demand Side Management - Hospital Engineering Systems Promote good house keeping practice   Retrofit existing engineering system / equipment for energy efficiency Establish energy efficiency design reference standard for new hospital projects   12

13 Summary of Implemented Measures 13 Air-conditioning (A/C) Lighting & Electrical MiscellaneousBoiler & Hot Water Energy Demand Side Management - Hospital Engineering Systems

14 Summary of Implemented Measures 14 Air-conditioning Improvement of A/C control system Automatic tube cleansing system for chiller Polarized refrigerant oil additive for chiller Chiller plant interconnection Variable speed drive for chiller Replacement of high efficiency chiller Use of water-cooled A/C system   Window reflective film Energy Demand Side Management - Hospital Engineering Systems

15 Summary of Implemented Measures 15 Lighting & Electrical LED exit sign T5 lighting retrofit   Sensor lighting control Compact fluorescent lamp Energy Demand Side Management - Hospital Engineering System

16 Summary of Implemented Measures 16 Boiler & Hot Water De-scaling device for boiler Heat pump application   Energy Demand Side Management - Hospital Engineering System

17 Summary of Implemented Measures 17 Miscellaneous Lift modernization Housekeeping & operational measures Energy management control & monitoring software   Energy Demand Side Management - Hospital Engineering System

18 Replace air-cooled chillers by water-cooled chillers  Identified suitable replacement of 22 air-cooled chillers in 8 venues within 5 years  Estimated $15M annual energy cost saving  Subject to business case and risk assessment 18 Proposed Further Measure Energy Demand Side Management - Hospital Engineering System

19 Energy Supply Side Management Alternative Choice of Energy Adopting renewable energy 19

20 Energy Supply Side Management - Alternative Choice of Energy Key considerations included: -Safety & Reliability -Environmental -Tariff Switching from Diesel fuel to Town gas - 9 hospitals already switched to towngas with offered rebate for dual fuel boilers 20

21 Proposed Further Measures Energy Supply Side Management - Alternative Choice of Energy Trigeneration Installation

22 Proposed Further Measures Energy Supply Side Management - Alternative Choice of Energy

23 Trigeneration installation High overall system efficiency in generating own electricity Residual heat for providing steam, hot water and air conditioning More viable with availability of use of landfill gas at lower tariff Require consultancy study review on trigeneration business case 23 Proposed Further Measures Energy Supply Side Management - Alternative Choice of Energy

24 Energy Supply Side Management - Adopting renewable energy Increase solar hot water system installation in hospitals Ride on new Government directives to install more renewable energy system in new hospital projects 24

25 (C) Energy Saving Achievements

26 Energy Saving Achieved Energy index in terms of mega joule per hospital floor area (MJ/m2) at downward trend 3.1% reduction in 5 year intervals from 2004/05 up to 2009/10 (equivalent to $70M cumulative savings) 26

27 (D) Sustaining Energy Saving

28 Sustaining Energy Saving Support ongoing Government initiation to reduce energy use and carbon emission Key initiatives include:  Energy Demand Supply Management ­ To consider replacing air cooled chiller to water cooled chiller  Energy Supply Side Management ­ To work out business case of using Trigeneration System 28

29 Sustaining Energy Saving  Continue to ensure hospitals are built with various energy efficient features by the works agents/consultants  Participate in territory-wide carbon-less certification scheme as encouragement and continual driving momentum Anticipated there would be further energy reduction 29

30 Thank You


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