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Green Hotel Concepts September 2010. Our Offices.

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Presentation on theme: "Green Hotel Concepts September 2010. Our Offices."— Presentation transcript:

1 Green Hotel Concepts September 2010

2 Our Offices

3 Our Services

4 Benchmarking

5 Benchmarking & Monitoring

6 How much energy do hotels use? Hard to benchmark Different metrics –Guestnights –Area Serviced Area Gross Internal Area (or Built Up Area) Total Area (including balconies) Big variance –Star Rating –Climate –Metrics used 5 Star hotels & resorts in Abu Dhabi Source: Energy Benchmarking study for Abu Dhabi Hotel Sector by Elie Gerges El Choufani (2010). Sponsored by Cundall. Excludes corridors, plant rooms, etc

7 4-5 stars 280 to 320kWh/m 2 3 stars 260 to 280kWh/m 2 2 stars 240 to 270kWh/m 2 Energy (kWh / m 2 of serviced space) Serviced Area = 300 kWh/m 2 Gross Int Area = 275 kWh/m 2 www.benchmarkhotel.com

8 Hotel Energy - UK UK Display Energy Certificate –105kWh/m2 – electricity –330kWh/m2 – gas –435kWh/m2 – TYPICAL 4 hotels in 2008 DEC database of 28,000 buildings

9 Green Guidelines for Hotels Cundall Role: Green Building Guidelines for Abu Dhabi Tourism Authority (ADTA) for their new and existing hotels. Our initial focus will be in the areas of water, energy and waste reduction for the existing 113 hotels in Abu Dhabi.

10 5 star hotels in Abu Dhabi = 567 per m2 of net lettable area Gross Internal Area

11 Hotel Energy - Asia

12 Water (m 3 per guest night)

13 Waste (kg per guest night)

14 Reducing Energy & Carbon

15 Reducing energy in hotels People using buildings use energy –Expectations –Behaviour Passive design Where is energy consumed? –L ight –E quipment –A ir –C ooling –H eating – space & water Renewables

16 Steps to low carbon design Design Criteria & Expectations Passive Design Internal Loads Energy Efficiency Heat Recovery On-site renewables Off site Comfort criteria, lighting levels, fresh air quantity, shower flows Form: daylight & natural ventilation Fabric: insulation, facade, thermal mass Lighting & Equipment (W/m2) Controls – turn off Heating, cooling & ventilation systems Control strategy Air to air, waste heat from chillers Aquifer Thermal Storage biomass, solar, wind, micro-hydro Gas CHP, geothermal Invest in off site renewables Reducing energy consumption Renewables

17 Thermal Comfort is 21 to 24ºC ? Air Temperature & Humidity – only part of the issue Comfort criteria = natural ventilation or air conditioning!

18 Facade influences energy Light Equipment Air Cooling Heating

19 PassivHaus – minimise heating Thermos Flask Building –Super insulation –Airtight Winter heating –Mechanical vent with heat recovery –Tiny heating system Summer cooling –Open the windows Expensive but effective PassivHaus Uwindows = 0.8 Uwalls = 0.1 Uroof = 0.1 Permeability = 0.05ach

20 Secure Natural Ventilation Example window system – Scandic Hotel, Sweden Double Glazing with Interstitial blind. Window is openable. Ventilation panel allows secure, bug free ventilation.

21 High Tech Cooling: Ceiling Fans?

22 Green Hotel Concept

23 Hotel Room Concept Low Energy: Comfort + Air Quality 100% outside air heat recovery unit with heating coil No mechanical cooling Thermal mass to moderate temperatures Ceiling fan for improved summer comfort Passive Design Shading to suit orientation Openable window Highly insulated & sealed facade Uwalls = 0.22 Uwindow = 1.8 Air Tightness = 4m3/hr

24 Variation (modular bathroom pod) Heating Hot Water circuit could supply chilled water for cooling. Fresh Air Supply could be tempered in peak summer conditions

25 LEDs are improving LED linear replacement lamps available today do not compete with linear T8 fluorescent lamps on the basis of light output, colour quality, distribution, lumen maintenance, or cost-effectiveness. Source: US Dept of Energy (2010)

26 Which controls would you prefer? Simple? Complicated? OFF Heating Fresh Air Only Warmer Cooler Cooling

27 Reduce hot water use Hot water = 25%+ of hotel energy consumption Reduce water use: 8l/min showers 4l/min taps Hoxton Hotel, London Interesting towel sign (heavy) rain shower

28 Guest education is important Notice in bedroom – Scandic Hotel, Sweden

29 Renewables

30 Renewable Heat Solar Hot WaterBiomass Boiler Heat Pump (air or ground source)

31 Solar Hot Water Hampton by Hilton, Brasov

32 Vatra Dornei Hotel Ground Source Heat Pump plus Biomass Boiler (+ Solar Thermal for DHW & swimming pool)

33 Renewable Electricity Photovoltaic Panels Wind Turbines Biofuel Combined Heat & Power (CHP)

34 Steps to low carbon design Design Criteria & Expectations Passive Design Internal Loads Energy Efficiency Heat Recovery On-site renewables Off site Comfort criteria, lighting levels, fresh air quantity, shower flows Form: daylight & natural ventilation Fabric: insulation, facade, thermal mass Lighting & Equipment (W/m2) Controls – turn off Heating, cooling & ventilation systems Control strategy Air to air, waste heat from chillers Aquifer Thermal Storage biomass, solar, wind, micro-hydro Gas CHP, geothermal Invest in off site renewables Reducing energy consumption Renewables

35 18-20 Louis Blanc Ground Floor Sector 1, 011752 Bucharest Tel. +40 21 208 02 30 Str. I.P Voitesti nr 1-3/ 54 400153 Cluj Napoca Tel. +40 264534240 David Clark d.clark@cundall.com


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