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 N • ‘Shoe box’ • 2 Storey • Floor Area 82 x 18 = 1476 m² • Volume 82 x 18 x 6 = 8856 m³ • Glazing area 30% each façade • Construction U-value 0. 3 W/m²k • Operations: occupancy, lighting, equipment • Control – heating set point 15ºC
Orientation Annual heating requirement 3369 k. Wh 3432 k. Wh 3391 k. Wh 3384 k. Wh • Does orientation make a difference? • 1. 8% change in heating requirement from best to worst.
Form • Panoramic Views • Building Layout
Orientation L-shape 3416 k. Wh 3412 k. Wh 3438 k. Wh • Confirms that orientation does not make much of a difference • Less than 1% change in heat loss
Glazing Areas SOUTH 50% NORTH 30% SOUTH 70% NORTH 30% SOUTH 90% NORTH 30% SOUTH 70% NORTH 3362 k. Wh 15% NORTH 3358 k. Wh SOUTH 3378 k. Wh 3265 k. Wh • South glazing 70% optimum • Decrease in north glazing gives a decrease in heat loss • A decrease in north glazing from 30 -15% only gives a 2. 7% decrease in heat loss
Marc Smeed Materials and Constructions
Construction Materials • • Base Case Material Cavity Wall U-Value 0. 3 W/m 2 K 3412 k. Whrs Lt Brown Brick 103 mm Cavity 50 mm Aerated Concrete 115 mm Insulation board 55 mm
Construction Materials • • High insulation wall construction Has low U-value U-Value 0. 2 W/m 2 K 3324 k. Whrs • Reduction 3. 2% Lt Brown Brick 100 mm Glass wool 150 mm Air 50 mm Glass wool 150 mm Breeze block 100 mm
Construction Materials • High external Thermal mass + Well insulated • U-Value 0. 12 W/m 2 K • 3291 k. Whrs • Reduction 4. 2% Slate 100 mm Glasswool 150 mm Air 50 mm Glasswool 150 mm Inner leaf brick 100 mm
Construction Materials • High internal Thermal mass + Well insulated • U-Value 0. 12 W/m 2 K • 3259 k. Whrs • Reduction 5% Lt Brown Brick 100 mm Glasswool 150 mm Air 50 mm Glasswool 150 mm Slate 100 mm
Glazing • • Base Case material Standard Double Glazing U-Value 2. 75 W/m 2 K 3412 k. Whrs Plate Glass 6 mm Air 16 mm Plate Glass 6 mm
Glazing • Low-E glass • U-Value of 2. 78 W/m 2 K • 3191 k. Whrs • Reduction 4. 4% Low-e glass 6 mm Air 12 mm Low-e glass 6 mm
Glazing • Low-E glass Triple Glazing • U-Value of 1. 78 k. W/m 2 K • 2991 k. Whrs • Reduction 10. 4% Low-e glass 6 mm Air 10 mm Low-e glass 6 mm
Form and Fabric • Combining: – Orientation – Optimum Glazing Areas – Materials • Demand 2475 k. Whrs • 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 2 m 3/s 26 -30°C Kitchen = >30 ach 18 -23°C • Other areas Gym/Changing rooms = 10 ach 24 -25 °C Bedroom = >1 ach 20 -24°C Restaurant = 10 to 15 ach 21 -22°C Open spaces = 10 to 15 ach 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
Winter Strategy Heat Recuperator Extractor fans Low e coating and removable shading Bedroom 1 Bedroom 2 Corridor Prevailing wind Channels feed back to atrium Restaurant/ Office Ducts from atrium Under floor heating (ground source heat pump)
Summer Strategy Heat Recuperator Extractor fans Low e coating and removable shading Bedroom 1 Bedroom 2 Corridor Prevailing wind Channels feed back to atrium Restaurant/ Office
Greig Paterson Building Design And Layout
Initial Design N
Ground Level N Circulation Staff Zones Food and Drink Leisure Plant Rest Rooms
st Level 1 N Circulation Bedrooms
Conclusions • Base Case Demand – 3412 k. Wh • After Form, Fabric and Orientation • 28% Reduction • CIBSE Guide Part F – good practice 35% reduction on typical practice • Base Case = Typical Practice
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