Page 149 - GreenRE_Sustainable Real Estate Book

9 Net Zero Energy / Carbon Neutral Design (NZE/CND):

Human society is dependent on energy to function. It must reduce and eliminate in dependency on use of non-renewable energy to create surplus energy where possible by using renewable energy.
Design Process ( to ) to progressively reduce the dependency on non-renewable resources
5
1
maximise passive mode strategies:
(micro-climate considerations)
• by builtform orientation mixed-mode strategies:
• by builtform massing & configuration
• by solar shading (partial M&E systems)
• by facade & enclosural design
• by building orientation & configuration
• by optimising ambient energies
Energy Level • by natural daylight • by natural ventilation (eg. during mid-seasons) full mode strategies: productive mode strategies: minimum use of fossil
• by operable facade / enclosural systems
• by natural ventilation
• by use of fans & extractors
(full M&E systems)
• by address seasonal variations
• by ground source heat pump
(renewable energy systems)
• by smart systems
• by high efficiency M&E systems
• wind energy
• by low embodied energy
• solar energy
• by internal loads reduction
• geothermal energy
• off-site, on-site green power fuels & surplus energy
1 2 3 4 5
Passive Mode Mixed Mode Full Mode Productive Mode
(bioclimatic design / no M&E systems) (partial M&E systems) (full M&E systems) (renewable energy systems)
Baseline Net Zero (Near) minimise
(establish design targets) minimise carbon footprint of built systems minimise carbon footprint of built systems & minimise carbon footprint of built systems carbon footprint of built systems
minimise carbon footprint & operational energy consumption operational energy consumption & operational energy consumption & operational energy consumption
of built systems following passive-mode design following mixed-mode design following full mode design following productive mode design
*Assess EEI (Energy Efficiency Index) (kWh/sqm/year) & embodied energy (by others) in every stage
Design process to progressively reduce the dependency on non-renewable resources
Consisted thermal comfort
Productive mode (renewable energy systems)
Full mode (full m&e / smart systems)
Mixed mode (partial m&e systems)
Passive mode (no m&e systems)
External environment
(Thermal conditions)
season:
tempered &
cold climate
Mid-Season Autumn Winter Mid-Season Spring Summer Mid-Season Autumn
level of thermal comfort conditions in relation to design modes

10 Green design

Presented here are the key factors in ecological design for humanity’s sustainable and resilient future. Which are crucial ecological factors. Design work must also consider designing for humanity’s well-being
and happiness.

SUSTAINABLE REAL ESTATE | Our 10-Year Journey 138