Project HGreen Workplace Design

under 26,000B/m2

Acharawan Chutarat, Ph.D.School of Architecture + Design, KMUTT

VisionDesign direction

Key strategiesBuilding form

Landscape designBuilding envelope

Air-conditioningSmart Lighting

Renewable energy

Design decision making through simulation and LCCDGNB Gold

The building will serve as a corporate office for 250 occupants. It also house a commercial area to serve the occupants and nearby residents. The building must be expandable to accommodate a fair amount of additional occupants as part of a planned expansion within five years of initial occupancy. In the future, it is possible that all retail spaces will be occupied by the company (office). Currently significant project’s requirements are:

• HQ building for HARN Engineering (6000 m2)

• Office area 5000m2 and commercial area 1000m2

• Space design promote collaborative working and Generation Z lifestyle

• Building as a demonstration case for learning

• Energy efficient building

• Achieve good indoor environment and thermal comfort

• Building that reflects HARN’s corporate identity

• Achieve DGNB’s Gold Certification

Interior Design Architectural Design Landscape Design Structural Engineer MEP DGNB

Better work, health, and well-beingBiophilic atmosphere• Access / connect / green, materials and natural light /

ventilation

Better respond to thermal and visual comfort• POE for lighting control• Feedback information on phone that can be

manipulated by software or AI

Smart and less effort in operation• Access control for spaces• Security control for identity verification

Energy efficient• Monitoring building information and suggesting best

schemes

“Strategies for Thai weather, Bangkok”

• Natural ventilation is appropriate for 19.4% of the

occupied hours (Adaptive Comfort model).

• Sun shading is highly recommended.

• Cooling and dehumidification are recommended

for 78.9% of the occupied hours.

• North and south wind are significant.

Building6500 sq.m.

1,800 sq.m. footprint

Parking for commercial

Parking.

SITE9,040 sq.m.

Landscape that cools ambient temperature

creating shade and green friendly

atmosphere

11.40 m

5.60 m

11.388 m 11.40 m

3.55 m

6.15 m

2.70 m

PRODUCT: STONESTYLIST หรือ AMO

SHADE: GREY

ปูกระเบื้องลายหินหกเหลี่ยมสีเทา

Water feature to reduce ambient temperature and creating pleasant background noise.

Play

Collaborative

Shared

Noisy space

Fun

Work

Concentration

Private

Silence

Focus

Zone design

sDA indicates the percentage of the workplane for which it occurs that the task illuminance is achieved using daylight during 50% of the working hours in a year, whereas ASE indicates the percentage of the workplane for which it occurs that illuminance levels related only to the direct component of daylight exceed the value of 1000 lx for at least 250 hours in a year.

Daylight Factor

Daylight Factor

Daylight Autonomy/Avg Solar Exposure

Daylight Autonomy/Avg Solar Exposure

Daylight Performance

Energy Performance

Lobby/Showca

se240 sq.m.

1st FLOORHARN Lobby

Show case

Retails / Coffee shop / Restaurant / Outdoor terrace

M&E room / Service loading

2nd FLOORCanteen (outdoor multipurpose)

Meeting center

Retails

4th FLOORAdmin

RF department

Shared space / pantry

Meeting rooms

5th-6th FLOORSC department

DP department

Meeting rooms

M&E

Retail

Food court

320 sq.m.

Meeting

center367

sq.m.

M&E /

Kitchen

Retail

RF230

sq.m.

ADMIN

470 sq.m.

DP425 sq.m.

SC425

sq.m.

“The Big picture”

“Solar gain reduction”Orientation / shading

Spanish moss

(เคราฤๅษ)ี

have high shading capability and low irrigation demand.

Solar gain is a significant cause of building heat gain in Thailand. Shading devices are necessary. Horizontal shading device is suitable for South-North façade.

A tree can become a powerful shading device and significantly reduce solar gain.

“Biophilic Design”Access to green / daylight

Pocket garden provide the occupants green view and access to daylight.

An example of a daylit space by an external courtyard.

“Biophilic Design”Access to natural material / natural ventilation

Brick as a main decorative building material. Provide earth-tone and natural feeling to the building.

Plant as a main material for shading device and other light weight material. Plants provide natural look to the building. It is also a sustainable material with ability to store the carbon, if procure sustainably.

Crosswind natural ventilation provide highest flow rate to the building interior. Suitable for tropical climate zone.

GREEN WALL

Where?• Facade

What?• Green wall

Why?• Shading• Reduce radiant

temperature• Green atmosphere

DAYLIGHT/ VIEW FOR WORKPLACE

Where?• All working area

What?• Daylight

Why?• Daylight and view have

significant impact on the occupants health, mind and comfort. All working spaces have access to daylight and view.

Consideration• Daylight Glare

Outside

view

Outside

view

Outside

view

Outside

view

Atrium

view

Outside

view

Garden

viewDaylight from

window

Daylight from

skylightDaylight from

window

Daylight from

window

PV and Daylight

Power : 108 kW

70 cm

PV Panel

Walkway

Bright color

ceiling300 cm

120 cm

Example of fan installationBIG ASS FAN

Where?• Ceiling of the 3rd floor

atrium• Ceiling of the 6th floor

atrium Why?• Help circulate the air in the

space and make the occupants feel cooler as a result of the increasing wind speed. Temperature set point of the air condition can be increase to save energy.

3rd FLOOR 6th FLOOR

Big Ass fan : Essence Series

AHU

AHU

AHU

AHU

AHU

AHU

Small

tank

“Collect condensed water from AHU”

Natural Ventilation with cool ambient

Where?• 1st – 3rd floor

circulation/lobbyWhy?• Help circulate and lower the

air temperature in the space and make the occupants feel cooler by evaporative cooling from featured water wall and condensate water and more wind speed from Big Ass fan.

VEGETABLE GARDEN

Where?• 3th floor Canteen area

What?• Hydroponic garden• Vegetable garden

Why?• Encourage food

generation• Organic• Better health

3rd

FLOOR

Flexibility

WATER REUSE FROM COOLING SYSTEM

Where?• 3rd floor Canteen

What?•Use water from AHU to

at the canteen area via irrigation of plants in the building.

•Water tank (small)

Why?• Use water from AHU to

cooldown the atmosphere.

• Condensed water is approx. 1.50 kg / hr per 1 ton cooling load.

AHU

AHU

AHU

AHU

AHU

AHU

Small tank

“Collect condensed water from AHU”

BUILDING ENVELOPE

Where?• Exterior wall and roof

What?•Light pre-cast concrete

+ rockwool insulation + vapor barrier + HDF board

Why?• Well insulated

wall/roof• Air tightness to reduce

latent load

Life Cycle Costs: Wall Insulation

Glazing Selection

Where?• Facade

What?•Comparative study on LCC

Why?• Help in decision making

over project life time

Sin

gle

glaz

ing-

22

07

B/m

2

Do

ub

le g

lazi

ng-

34

98

B/m

2

Do

ub

le g

lazi

ng

low

-6

45

9 B

/m2

Life Cycle Costs: Glazing

Comparison of HVAC options

Comparison of investment costs

Life Cycle Costs: HVAC

CHILLERS

Where?• 1st floor

What?: Chiller 7⁰C• Quantity : 3 units (1

constant, 1 for part load50RT for DOAS and 150RT for AHUs and 1 small for radiant cooling 13⁰C 3.5RT)

Why?• Flexibility for various

time of use• 25-30% energy saving

compared to conventional

Chiller rm. as a demonstration room

in the lobby area

Active Chilled Beam

Radian Cooling Floor

13⁰C

16⁰C

Fresh air from DOAS

Separated small chiller at higher temperature

Energy Intensity 110 kWh/m2-y

Ref: Ministry of Energy

OfficeMallRetailHotelCondoHospitalEduOthers

Structure32%

Architecture11%

Interior8%

Signage0%

MEP30%

IT7%

AV5%

Landscape7%

COST BREAKDOWN

IT as software infrastructure that allows other systems to plug in (virtual LAN), digital door lock, shared printing, CCTV, lighting control, HVAC control, PV.

Big data , learning from machine to develop future control logic based on human behavior for well-being and for potential of energy saving as well.

Thank you for your attention

acha@bioarchitek.comacharawan.chu@kmutt.ac.th