Bank Place, Bristol - Regensw
Bank Place, Bristol Landmark office development Situated at the heart of Bristol Two buildings, Bank Place 1 & 2 Target of BREEAM excellent 17,000m2 and 9500m2
Designing for Low Carbon Advanced Modelling Techniques IES Virtual Environment DIALux Lighting design 3D+ CAD
Façade Engineering Essential to model proposed Façade solutions to balance: •Aesthetics
Shading Options
•Cooling loads •Day-lighting (up to 10%+ reduction in BER) •To meet BCO standards
Façade solutions tested: glazing types (G values) glazed areas (ratio glazed/ unglazed) shading solutions (horizontal/ vertical Brise Soleil - overhang depth)
Glazing types Glazing area 100% - 30%
Thermal Modelling Solar loads for Façade designs options 200 180
160
BCO standard = 75W/m 2
Peak Solar Load (w/m2)
140
120 100 80
F aça de 7
60
Offi ce 8
Offi ce 4
Façade 3
40
Façade 8
Façade 2 Office 3
20
O ffice 7 F aça de 6
Office 2
0 Base case
50% glazed area, no shading, G= 0.43
50% glazed area, shading type B, G= 0.44
50% glazed area, shading type B, G= 0.36
34% glazed area, no shading, G= 0.43
34% glazed area, 50% glazed area, shading type C, G= shading type B 0.43 extended, G= 0.44
Office 1 Fa çad e 4 Office 5
Office 6 Façade 5
Façade 1
Lighting Design Trading cooling & day-lighting Day-lighting is lower for: • decreased G value of glazing • increased shading • less glazing
Lighting design
Measures for Bank Place • time, presence and daylight control • energy efficient fluorescent lamps (with energy efficient control gear) • zoned to maximise controllability
Floor plate of Bank Place 1
Mechanical Services Design 12 scenarios examined using IES Model Tested: chiller COP, FCU drive, daylight dimming
Chosen scenario reduction on TER: Bank Place 1 = 25 %
Bank Place 2 = 30%
Mechanical Services Design Efficient Cooling: Frictionless, oil-free compressors with magnetic-bearing system Chiller spec: COP = 5 @ full load
3 @ 10% load
Lower Specific Fan Power DC motors used on fan coil units (0.4W/l/s)
Mechanical Services Design Efficient heating and heat recovery: 4 pipe fan coil units for offices and reception Gas condensing boiler Heat recovery using thermal wheel (70% efficient)
Optimised use of energy: BMS system with: •Optimum start control •Temperature set back in unoccupied areas •Heat Recovery •Automatic switching of the lighting installation
Poor thermal control
Results A speculative development with a 25-30% reduction on Building Regulation TER Currently targeting BREEAM excellent
A Zero Carbon Office A office current nearing completion
Definition of zero carbon A zero carbon development is one that achieves zero net carbon emissions from energy use on the site on, a net annual basis
Appropriate Low and Zero Carbon Technologies
Appropriate Low and Zero Carbon Technologies
Appropriate Low and Zero Carbon Technologies
Fresh air in winter …
Appropriate Low and Zero Carbon Technologies
Fresh air in summer …
Appropriate Low and Zero Carbon Technologies
Keeping you warm …
Appropriate Low and Zero Carbon Technologies
Keeping you cool …
Appropriate Low and Zero Carbon Technologies
Lighting the office …
Appropriate Low and Zero Carbon Technologies
Reducing glare …
Designing for Low Carbon Advanced Modelling Techniques IES Virtual Environment DIALux Lighting design 3D+ CAD
Façade Engineering Essential to model proposed Façade solutions to balance: •Aesthetics
Shading Options
•Cooling loads •Day-lighting (up to 10%+ reduction in BER) •To meet BCO standards
Façade solutions tested: glazing types (G values) glazed areas (ratio glazed/ unglazed) shading solutions (horizontal/ vertical Brise Soleil - overhang depth)
Glazing types Glazing area 100% - 30%
Thermal Modelling Solar loads for Façade designs options 200 180
160
BCO standard = 75W/m 2
Peak Solar Load (w/m2)
140
120 100 80
F aça de 7
60
Offi ce 8
Offi ce 4
Façade 3
40
Façade 8
Façade 2 Office 3
20
O ffice 7 F aça de 6
Office 2
0 Base case
50% glazed area, no shading, G= 0.43
50% glazed area, shading type B, G= 0.44
50% glazed area, shading type B, G= 0.36
34% glazed area, no shading, G= 0.43
34% glazed area, 50% glazed area, shading type C, G= shading type B 0.43 extended, G= 0.44
Office 1 Fa çad e 4 Office 5
Office 6 Façade 5
Façade 1
Lighting Design Trading cooling & day-lighting Day-lighting is lower for: • decreased G value of glazing • increased shading • less glazing
Lighting design
Measures for Bank Place • time, presence and daylight control • energy efficient fluorescent lamps (with energy efficient control gear) • zoned to maximise controllability
Floor plate of Bank Place 1
Mechanical Services Design 12 scenarios examined using IES Model Tested: chiller COP, FCU drive, daylight dimming
Chosen scenario reduction on TER: Bank Place 1 = 25 %
Bank Place 2 = 30%
Mechanical Services Design Efficient Cooling: Frictionless, oil-free compressors with magnetic-bearing system Chiller spec: COP = 5 @ full load
3 @ 10% load
Lower Specific Fan Power DC motors used on fan coil units (0.4W/l/s)
Mechanical Services Design Efficient heating and heat recovery: 4 pipe fan coil units for offices and reception Gas condensing boiler Heat recovery using thermal wheel (70% efficient)
Optimised use of energy: BMS system with: •Optimum start control •Temperature set back in unoccupied areas •Heat Recovery •Automatic switching of the lighting installation
Poor thermal control
Results A speculative development with a 25-30% reduction on Building Regulation TER Currently targeting BREEAM excellent
A Zero Carbon Office A office current nearing completion
Definition of zero carbon A zero carbon development is one that achieves zero net carbon emissions from energy use on the site on, a net annual basis
Appropriate Low and Zero Carbon Technologies
Appropriate Low and Zero Carbon Technologies
Appropriate Low and Zero Carbon Technologies
Fresh air in winter …
Appropriate Low and Zero Carbon Technologies
Fresh air in summer …
Appropriate Low and Zero Carbon Technologies
Keeping you warm …
Appropriate Low and Zero Carbon Technologies
Keeping you cool …
Appropriate Low and Zero Carbon Technologies
Lighting the office …
Appropriate Low and Zero Carbon Technologies
Reducing glare …
