Sustainable Hotel Design Presentation 2 Passive Design Group 5

Site Analysis Site C –Panoramic Views –Better Access –“Easier” Excavation –Less Visual Impact –Greatest Water Source

Group Aims Passive Design Design out mechanical services as much as possible Demand Reduction

Group Aims Simulation – form, fabric, orientation Ventilation and Air flow Building Layout

Base Case ‘Shoe box’ 2 Storey Floor Area 82x18 = 1476m² Volume 82x18x6 = 8856m³ Glazing area 30% each façade Construction U-value 0.3 W/m²k Operations: occupancy, lighting, equipment Control – heating set point 15ºC N

Orientation Does orientation make a difference? 1.8% change in heating requirement from best to worst kWh Annual heating requirement 3432 kWh3391 kWh3384 kWh

Form Panoramic Views Building Layout

Orientation L-shape 3416 kWh3412 kWh3438kWh Confirms that orientation does not make much of a difference Less than 1% change in heat loss

Glazing Areas SOUTH50%3362 kWh NORTH30% SOUTH70%3358 kWh NORTH30% SOUTH90%3378 kWh NORTH30% SOUTH70%3265 kWh NORTH15% South glazing 70% optimum Decrease in north glazing gives a decrease in heat loss A decrease in north glazing from % only gives a 2.7% decrease in heat loss NORTH SOUTH

Marc Smeed Materials and Constructions

Construction Materials Base Case Material Cavity Wall U-Value 0.3W/m2K 3412kWhrs Lt Brown Brick103mm Cavity50mm Aerated Concrete115mm Insulation board55mm

Construction Materials High insulation wall construction Has low U-value U-Value 0.2W/m2K 3324kWhrs Reduction 3.2% Lt Brown Brick100mm Glass wool150mm Air50mm Glass wool150mm Breeze block100mm

Construction Materials High external Thermal mass + Well insulated U-Value 0.12W/m2K 3291 kWhrs Reduction 4.2% Slate100mm Glasswool150mm Air50mm Glasswool150mm Inner leaf brick100mm

Construction Materials High internal Thermal mass + Well insulated U-Value 0.12W/m2K 3259 kWhrs Reduction 5% Lt Brown Brick100mm Glasswool150mm Air50mm Glasswool150mm Slate100mm

Glazing Base Case material Standard Double Glazing U-Value 2.75W/m2K 3412kWhrs Plate Glass6mm Air16mm Plate Glass6mm

Glazing Low-E glass U-Value of 2.78 W/m2K 3191kWhrs Reduction 4.4% Low-e glass6mm Air12mm Low-e glass6mm

Glazing Low-E glass Triple Glazing U-Value of 1.78kW/m2K 2991kWhrs Reduction 10.4% Low-e glass6mm Air10mm Low-e glass6mm Air10mm Low-e glass6mm

Form and Fabric Combining: –Orientation –Optimum Glazing Areas –Materials Demand 2475kWhrs Overall demand reduction of - 28%

Bruce Henry Heat Recovery and Natural Ventilation

Ventilation for hotels Main criteria As Quiet as possible. Offer a high level of control to allow for maximum comfort. Increased ventilation for kitchen/gym and swimming pool. Acoustic isolation from other rooms and corridors.

CIBSE Guide Highlighted areas of increased ventilation Swimming pool = 1.35 to 2m 3 /s 26-30°C Kitchen = >30ach 18-23°C Other areas Gym/Changing rooms = 10ach °C Bedroom = >1ach 20-24°C Restaurant = 10 to 15ach 21-22°C Open spaces = 10 to 15ach 20-27°C

Dehumidification Area of concern in swimming pool/gym and kitchen. Solution, increase supply of fresh. Consideration- to prevent condensation forming and provide occupants comfort

Reducing power consumption 1)Heat recuperator Efficiency 60% 2)High efficiency fans 3)Frequency inverter Calculates air flow with respect to dehumidification load, combination of 2 and 3 reduces power to 12.5% of maximum load 4)Heat recovery/Heat pump COP=3, supply 80% of seasonal heating requirement

Low e coating and removable shading Prevailing wind Bedroom 1Bedroom 2 Under floor heating (ground source heat pump) Ducts from atrium Restaurant/ Office Heat Recuperator Corridor Extractor fans Winter Strategy Channels feed back to atrium

Low e coating and removable shading Prevailing wind Bedroom 1Bedroom 2 Restaurant/ Office Heat Recuperator Corridor Extractor fans Summer Strategy Channels feed back to atrium

Greig Paterson Building Design And Layout

Initial Design N

Ground Level Circulation Staff Zones Food and Drink Leisure Plant Rest Rooms N

1 st Level Circulation Bedrooms N

Conclusions Base Case Demand – 3412 kWh After Form, Fabric and Orientation 28% Reduction CIBSE Guide Part F – good practice 35% reduction on typical practice Base Case = Typical Practice

Thank You For Listening Any Questions?