TAISEI Zero Energy Building
ZEB
SE４ALL Global Energy Efficiency Forum on Cities
29/Oct/2015
Kazuyuki Shimamura, Ph.D.
Executive Fellow, Deputy General Manager, Environment DivisionZEB Project

Copyright Ⓒ TAISEI corporation all rights reserved1What’s ZEB ?

net Zero Energy Building

ZEB is the building withZERO energy annual consumption

ZEB Project

Copyright Ⓒ TAISEI corporation all rights reserved2Targets of ZEB

Policy target of Japan
Targeting to realize ZEB,

By 2020; New public buildings
By 2030; Average of new buildings
Targets of US, EU, UK and France
By 2020~2030
ZEB Project

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3General Description of Our ZEB
Floor number：3 stories

Total floor area：1,300 ㎡

ZEB Project

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4Concept

Comfortable Office
Providing a smart andComfortable work
environment

Zero Energy

Greater
Reassurance

ゼロエネルギー ひとつ上の安心
Neutral energy balance
Achieved by ultimate
Energy savings andPower generation

ZEB Project

Highly safety andSupport for BCP

Copyright Ⓒ TAISEI corporation all rights reserved5Results of Annual energy balance

Annual Energy
consumption

AnnualEnergyproductionTypicalBuilding
Ultimate Energy
Savings
ZEB
ProjectPower
Generation２７％

463MJ/㎡･yr

493MJ/㎡･yr（129kwh/㎡･yr）（137kwh/㎡･yr ）ZEB Project

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6

Results of Monthly Energy Production and consumption
2014.6.1– 2015.5.31＋ Production 493 MJ/㎡･yr（137 kwh/㎡･yr）
Simulated

Actual0－ Consumption 463 MJ/㎡･yr（129 kwh/㎡･yr）
6
ZEB Project

78

910

11

12

12

345

月

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7

Photovoltaic (PV) Installation

Roof Top
Monocrystal PV
External WallOrganic
Thin Film PV

ZEB Project

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8Energy Consumption of Building Operation (typical office)Water supply & drainage : 1%

Elevators : 3%

Heating water supply : 1%

Others : 5%Heat source：31%

Ventilation : 5%

Plug Load : 12%

Air-conditioning：43%

Lighting：21%
Heat transfer：12%
ZEB Project

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9Smart sensor (T-smart Focus)
Smart sensor

Precisely detect real time
human occupation
sensor

1.8m

1.8m
1.8m
ZEB Project

1.8m

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Task and Ambient Lighting System

LightingAmbient Lighting
300Lx

700Lx

Task Lighting
700Lx

Standard Lighting
SystemZEB Project

Task and AmbientLighting System
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Advanced Task and Ambient lighting system

Natural light

LED lighting(upward)

LED lighting(downward)

SmartSensor

Organic EL task light
Present
Ambient light
Task light

ZEB ProjectAbsent
ONON

Ambient light extinction
OFF
Task light

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Advanced Lighting control system
Automatic Ambient Lighting
controlled by Smart Sensor

Turned on

ZEB ProjectTurned off
Organic EL
Task Light

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Day-lighting System (T-Light Cube)

Constant Reflection of Sunlight at any position
Day-lighting system

MirrorWhite ceiling
Overhead Lighting
Diffusion light

ZEB Project

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Day-lighting System (T-Light Cube)ZEB Project

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Task and Ambient Air conditioning System

Air Diffuser

Air Diffuser

Ambient zone
26℃

Task zone

26℃
26℃

28℃

26℃

28℃

Task Air Diffuser

Conventional system

ZEB Project

Task & Ambient systemCopyright Ⓒ TAISEI corporation all rights reserved 16

Advanced Task and Ambient Air conditioning System
Fuel cell

Absorption chiller

Waste Heat
Slab-embedded piping28℃

Radiant cooling from the slab
Smart Sensor

26℃

Personal airConditioning unit

Automatic-controlled personal Floor diffuser

ZEB Project

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Ambient Cooling and Heating by Radiant System

ZEB Project

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Task Air conditioning system by Floor Diffuser
Air from Floor Diffuser is controlled by Smart Sensor

Automatic control personalFloor diffuserZEB Project

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Building Energy Management System (T-Green BEMS)
Socket

Thermal Storage

Lighting
ButteryStorage

Storage

HighEfficiency

Airconditioning

Management

PV

Generation

Fuel Cell
Gas Co-Generation
ZEB Project

Commercial
EnergySourcePower

Natural Gas
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Building Energy Management System (T-Green BEMS)

production

consumption
Air conditioning

Photo Voltaics
Lighting

SocketOther

ZEB Project

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Reliable and High Efficient Energy System
Out Side

Storage
Battery

StoragePowerPVAir
conditioning

Discharge PowerLightingCommercial PowerPowerFuel Cell

PowerCity Gas

OtherPowerCity Gas

Co-generation

Wasteheat
Waste heat

Heating water
Heat

Heat
Storage
Absorpedchiller

Heating water

ZEB Project

SocketHeat

Chilled water

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ZEB Planning and Assessment Tool

T-ZEB simulator
Site conditions

Building

Evaluation of energy

Evaluation of energy
Efficiency in building design

Generation potential

ZEB Project

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For a Lively WorldZEB Project

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