Sustainable Hotel DesignSustainable Hotel Design

Presentation 2Passive Design

Group 5

Site AnalysisSite Analysis

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

Group AimsGroup Aims

• Passive Design

• Design out mechanical services as much as possible

• Demand Reduction

Group AimsGroup 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.

3369 kWh

Annual heating requirement

3432 kWh 3391 kWh 3384 kWh

Form

• Panoramic Views• Building Layout

Orientation L-shape

3416 kWh 3412 kWh 3438kWh 3438 kWh

• Confirms that orientation does not make much of a difference• Less than 1% change in heat loss

Glazing Areas

SOUTH 50% 3362 kWh

NORTH 30%

SOUTH 70% 3358 kWh

NORTH 30%

SOUTH 90% 3378 kWh

NORTH 30%

SOUTH 70% 3265 kWh

NORTH 15%

• 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

NORTH

SOUTH

Marc SmeedMarc Smeed

Materials and Constructions

Construction Materials

• Base Case Material• Cavity Wall• U-Value 0.3W/m2K• 3412kWhrs

Lt Brown Brick 103mm

Cavity 50mm

Aerated Concrete

115mm

Insulation board

55mm

Construction Materials

• High insulation wall construction

• Has low U-value• U-Value 0.2W/m2K• 3324kWhrs

• Reduction 3.2%Lt Brown Brick

100mm

Glass wool 150mm

Air 50mm

Glass wool 150mm

Breeze block 100mm

Construction Materials

• High external Thermal mass + Well insulated

• U-Value 0.12W/m2K • 3291 kWhrs

• Reduction 4.2% Slate 100mm

Glasswool 150mm

Air 50mm

Glasswool 150mm

Inner leaf brick 100mm

Construction Materials

• High internal Thermal mass + Well insulated

• U-Value 0.12W/m2K • 3259 kWhrs

• Reduction 5%Lt Brown Brick 100mm

Glasswool 150mm

Air 50mm

Glasswool 150mm

Slate 100mm

Glazing

• Base Case material• Standard Double Glazing• U-Value 2.75W/m2K • 3412kWhrs

Plate Glass 6mm

Air 16mm

Plate Glass 6mm

Glazing

• Low-E glass• U-Value of 2.78 W/m2K• 3191kWhrs

• Reduction 4.4%

Low-e glass 6mm

Air 12mm

Low-e glass 6mm

Glazing

• Low-E glass Triple Glazing• U-Value of 1.78kW/m2K• 2991kWhrs

• Reduction 10.4%Low-e glass 6mm

Air 10mm

Low-e glass 6mm

Air 10mm

Low-e glass 6mm

Form and Fabric

• Combining:– Orientation– Optimum Glazing Areas– Materials

• Demand 2475kWhrs

• Overall demand reduction of - 28%

Bruce HenryBruce 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 2m3/s 26-30°C

Kitchen = >30ach 18-23°C• Other areasGym/Changing rooms = 10ach 24-25 °CBedroom = >1ach 20-24°CRestaurant = 10 to 15ach 21-22°COpen 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 fans3)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 1 Bedroom 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 1 Bedroom 2

Restaurant/ Office

Heat Recuperator

Corridor

Extractor fans

Summer Strategy

Channels feed back to atrium

Greig PatersonGreig Paterson

Building DesignAnd Layout

Initial DesignInitial Design

N

Ground LevelGround Level

Circulation

Staff Zones

Food and Drink

Leisure

Plant

Rest Rooms

N

1st Level1st Level

Circulation

Bedrooms

N

ConclusionsConclusions

• 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

Thank You For Listening

Any Questions?