Passive Radiative Sky Cooling Material

Passive RadiativeSky Cooling Material

©2021 SPACECOOL Inc. All Right Reserved.

Overview

1. SPACECOOL Company Profile

2. What is SPACECOOL®?

3. Product lineup, Applications, Value Proposition

4. Demonstration results @Osaka Gas Laboratory

5. Next Steps


Company Profile

Company Name: SPACECOOL, Inc.

Established: April 1, 2021

Stockholders: WiL, LLC 51%, Osaka Gas Co., Ltd. 49%

Tokyo Office: Toranomon Hills Business Tower 4F, Toranomon 1-17-1,

Minato-ku, Tokyo, Japan

Osaka Office: Torishima 6-19, Konohana-ku, Osaka, Japan

President & CEO: Takayuki HOSHUYAMA


SPACECOOL® is passive radiative sky cooling material that was developed by Osaka Gas. This high-performance, high-durability, flexible film blocks heat from the sun and atmosphere and reduces heat absorption. Further, heat is dispelled through radiation to outer space, enabling continuous cooling without consuming any energy.

What is SPACECOOL®?

Sun Atmosphere

BlockedBlocked

Lower temperature than ambient air

Radiation to space


Mechanism: Passive Radiative Sky Cooling

This film reflects sunlight and radiates heat to outer space through a transparency window in the atmosphere between 8 and 13 micrometers.

A new challenge: Energy input coming from the sun < Radiant heat

Sun Atmosphere

BlockedBlocked

Lower temperature than ambient air

Radiation to space

Sunlight: reflection Atmospheric window

Sole

r Ene

rgy(

W/m

2 /nm

)

Atm

osph

eric

tran

smitt

ance

spec

trum

Solar spectrum

Atmospheric trans-mittance spectrum

Wavelength (μm)

Infrared rays

Infrared rays=Thermal radiation


Product lineup

-Silver (Shiny or Matte)-White (Shiny)

-Silver (Shiny)-White (Shiny)

■Film type (with adhesive) ■Canvas type


Potential Applications

SPACECOOL can be applied for a variety of purposes.

Temporary housing(Office units)

Tents Trucks Shipping containers

Factories/storage Outdoor appliances/devices

Heatstroke-preventionproducts

Any purposeimaginable


Value Proposition

Value -What we offer-

For PeopleSafety and comfort

For ThingsImproved reliabilitySpace efficiencyFinances

For SocietyImproved reliabilitySpace efficiencyFinances

Heatstroke prevention.Foodstuffs preservation.

Prevention of outdoor appliance/device failure.Efficient use of shipping space.Cost reductions.

Cooling that does not rely on electricity, gas, or other types of energy.Reduction of greenhouse gas emissions.

▼ ▼ ▼


2–6°C lower temperature than ambient temperatureCooling Performance: 70–100 W/m2

Performance in the summer

Cf) Solar reflective paint: Ambient temperature + 10–20°C, steel plate: ambient temperature + 40–50°C

Solar reflective paint SPACECOOL

8 10 12 14 16

20

30

40

50

SPACECOOLTM

Ambient temperature

TimeTe

mpe

ratu

re (

°C)

Temperature of underside of solar reflective paint/radiative sky cooling material*

*Temperature of underside of steel plate coated with solar reflective paint and with SPACECOOL


Confirmed to have the equivalent of 4 years or more of resistance to ultraviolet rays.

Weather Resistance

Xenon Weather Meter test results

0 h 2000 h

(Equivalent to 4 years)

No changes in color or spectrum<Test details>

• Used a Xenon Weather Meter made by Suga Test Instruments.• Referenced JIS standard 5600-7-7 when setting conditions.• Sunny weather conditions: 180 W/m2, blackbody temperature

89℃, humidity 50%, 1 hour 42 minutes• Rainy weather conditions: 180 W/m2, tank temperature 38℃,

humidity 90%, 18 minutes• Reference: 18-fold acceleration in ultraviolet ray conversion

(486 hours: equivalent to 1 year)

●Solar absorptance coefficient0 hours: 5%2000 hours: 5% (constant)

●Average of emissivity (8–13μm)0 hours: >90%2000 hours: >90% (constant)


Value for people (heatstroke prevention)

SPACECOOL silver tent

Normal tent

Sensory temperature (Blackbody temperature)

August 14 August 15 August 16

Normal tent

SPACECOOLtent

SPACECOOL tent Normal tent

SPACECOOL white tent

Demonstration test comparing radiative sky cooling tent and normal white tentConfirmed a difference of approximately -10°C in sensory temperature


Value for things (improved reliability)Installation of SPACECOOL material can reduce the internal temperature of panelboards, etc. by approximately 10°C

Initial storage unitStorage unit with thermal insulationStorage unit with SPACECOOLTM

Ambient temperatureWhite storageunit (Initial)

Storage unit with thermal

insulation

Storage unit with SPACECOOLTM

Temperature of roof

Solar radiationintensity

Temperature of storage

Sola

r irr

adia

nce

(W/m

2 )June 9 2020

Time

Tem

pera

ture

℃Te

mpe

ratu

re ℃


Value for society (energy saving)

0

50

100

150

200

250

300Approx. 20% down

0.27 kWh

SPACECOOLUninstalled

0. 22 kWh

Aver

age

elec

tric

ity c

onsu

mpt

ion

from

9:0

0 to

18:

00

(kW

h)

• Average values from 9:00 to 17:00 for 8/27 through 9/8. (Data of rainy days excluded.)

• Conditions:• 10.25-m2 temporary housing/office units• 24-hour air-conditioning set to 25℃ (strong) (Hitachi

Shirokuma-kun air conditioner)• Measured electricity consumption with an electricity

meter attached to the panelboard.

We installed radiative sky cooling material on temporary housing/office units at a construction site and compared electricity consumption of those with and without the material. With the material, electricity consumption between 9:00 and 18:00 went down approximately 20%.

Solar reflective paintSPACECOOL silver

SPACECOOL white


Next Steps

Basic researchSamples

Demonstrate effectiveness

Improve weather

resistance

Stabilize qualityMass

production

█ Converting to actual business = incorporation █ Shipping charged samples domestically (Beginning PMF)

█ Acquiring joint-development partners (diffusers)

Begin distribution

Joint-development

partners

Documents

Passive Radiative Sky Cooling Material