Structure

Cooling

Presented by:

Madhusudhan Rapole 1

The Cleantech Infrastructure Co.

Oorja’s Focus - Combating Climate Change…

• Use solar energy for desalination & sludge drying

• Eliminate fossil fuels for process heating and space heating

• Reduce energy input for air conditioning of commercial / residential buildings/ structures

Cooling Heating

PowerWater & Effluents

• Develop multi-pollutant emission

control systems

• Develop advanced CSP and ORC

systems through collaborations

3

Solution Matrix

End Use Market Segments

Industrial Commercial Defence Residential

Cooling • Radiant Cooling

• Structure Cooling

• Cooling using Heat

Recovery

• Radiant Cooling

• Geothermal

Cooling

• Structure Cooling

• Cooling for Data

Centers

• Radiant Cooling

• Structure Cooling

Heating • Solar Process Heating

• Solar Drying

• Radiant Heating

• Geothermal Heating

• Heating of

Greenhouses

Water • Solar Desalination

• Solar Effluent Treatment

Power • Power Generation using

Low Grade Heat

Recovery

• Multi Pollutant Emission

Control

• Drying of Coal/Lignite

• Small scale Power

Generation

Solutions executed/under

executionSolutions under development

4Tropical and sub-tropical countries have higher cooling requirements.

Geography, Geography, Geography…..

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Countries like India have lower than 6% air conditioning penetration and are on a path to increase that to more than 50% in next 30 years.

Cooling Our Homes & Offices, by Heating Our Planet

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ACs cool air in the building & do not cool the biggest source of indoor heat - building structure.

Cool the structure, it will cool the rest.

Structure Cooling

Simulation results of a different operative temperatures for 24 hours in different areas of two-storey residence on a peak day.

We can observe that the operative temperatures are more or less constant even in the night due to the heat accumulated in the building.

Operative Temperature Simulation

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36

38

40

42

44

46

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

GFBR

GFS

GFLR

GFT

GFE

GFK

GFT1

FFLR

FFBR

FFT1

FFT

FFSR

FFE

FFK

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Temperature of concrete ceiling at 8 PM when ambient temperature is 25 deg C.

Temperature of ceiling of industrial shed at 1 PM when ambient temperature is 40 deg C.

(105 F)(181 F)

Thermographic Validation

Structure Cooling

• Embed pipes in Slab/Floor/False Ceiling

• Water circulated at 15-25 °C temp.

• Two stage Cooling towers are used9

Two Stage Cooling Tower for Lower Water Temperature

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Two Stage Cooling Tower

Advantages

Capex of Rs. 150-200/Sq. Ft.

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Opex less than Rs. 0.50/Ton

Better

Air

Quality

Reduction of Load for Air Conditioned

Buildings

Uniform

Cooling

Structure Cooling Conventional AC

Energy Consumption 0.05 KW/ton 0.6-1.0 KW/ton

OPEX for 100 ton installation / day Rs. 500 Rs. 6000-10,000

Heat Deduction at Source (HDS) Yes No

Life of the system > 50yrs < 20 yrs

Structure Re-radiates Heat No Yes

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• Can be implemented in a hybrid manner with conventional HVAC technologies like Chiller-AHU, VRV, Split ACs etc.

• Reduces the Cooling load by 20-60% depending on the location, season & type of building.

• Examples – Commercial Buildings, IT Parks etc.

Buildings Requiring maintenance of 24 deg C Indoor Temperature

Implementation Options

Buildings Requiring maintenance of 26-30 deg C Indoor Temperature

Buildings Requiring maintenance of 24 deg C Indoor Temperature

• Buildings where Air Conditioning is not an option, but comfort needs to be provided.

• No vapour compression based cooling

• Focus on providing comfort with fans & natural ventilation.

• Examples – Govt Buildings like Courts, Public Health Centers, Schools etc.

• Same as Option 1, except better controls to switch between Two Stage Cooling and Chiller operation depending on the Wet Bulb Temperature and Building Load.

• Examples – Commercial Buildings, IT Parks etc.

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Annual WBT Data - HyderabadJan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

0:01- 1:00 16.7 14.7 19.7 21.8 21.9 22.8 22.3 22.4 22.6 20.8 17.4 15.9

1:01- 2:00 16.5 14.5 19.7 21.7 21.9 22.5 22.1 22.1 22.4 20.7 17.3 15.7

2:01- 3:00 16.2 14.2 19.5 21.5 21.9 22.4 22 21.9 22.3 20.4 16.9 15.3

3:01- 4:00 16.1 13.9 19.4 21.6 21.7 22.3 21.8 21.7 22.1 20.3 16.8 15.1

4:01- 5:00 16.1 13.8 19.1 21.8 21.7 22.3 21.7 21.8 22 20.1 16.6 15.1

5:01- 6:00 16.3 14 19.4 22 21.7 22.3 21.8 21.8 22 20.4 17.1 15.5

6:01- 7:00 16.6 14.5 19.7 22.2 22.1 22.5 22 21.9 22 20.8 17.8 16

7:01- 8:00 17.1 15.3 20 22.4 22.6 22.9 21.2 22.3 22.2 21.4 18.6 16.7

8:01- 9:00 17.7 16.1 20.2 22.6 23 23.3 22.6 22.8 22.6 21.8 18.9 17.4

9:01-10:00 18 16.6 20.2 22.8 23.2 23.7 23.9 23 22.9 22.3 19.1 18.1

10:01-11:00 18.4 16.9 20.3 22.7 23.5 23.7 23.3 23.4 23.4 22.2 18.9 18.3

11:01-12:00 18.4 17.1 20.2 22.7 23.5 24.1 23.5 23.5 23.4 23.2 19 18.6

12:01-13:00 18.4 17.1 20.2 22.8 23.3 24.3 23.7 23.8 23.6 22.2 18.9 18.5

13:01-14:00 18.3 17 20.3 22.8 23.1 24.5 23.8 23.8 23.6 22 19 18.7

14:01-15:00 18.2 16.6 20.3 22.6 22.8 24.3 23.7 23.8 23.4 21.9 18.8 18.5

15:01-16:00 18.2 21.4 20.4 22.5 22.8 24.4 23.7 23.8 23.4 21.6 19 18.3

16:01-17:00 17.7 16.4 19.9 22 22.8 24.3 23.2 23.4 23.1 21.3 18.7 18

17:01-18:00 17.6 16.1 19.6 21.8 22.5 24.1 23.1 23.2 23.1 20.9 18.3 17.6

18:01-19:00 17.3 15.9 19.4 21.8 22.3 23.8 22.8 23 22.9 20.8 18.2 17.4

19:01-20:00 17.2 15.8 19.4 21.8 22.3 23.6 22.6 22 22.8 20.7 18.1 17.3

20:01-21:00 17.3 15.3 19.4 21.9 22.2 23.5 22.8 23.2 22.9 20.7 17.8 17.1

21:01-22:00 17.2 15.1 19.5 22 22 23.3 22.7 22.7 22.8 20.6 17.7 16.9

22:01-23:00 17.1 15 19.6 22 22.2 23.2 22.6 22.6 22.8 20.6 17.4 16.6

23:01-24:00 16.9 14.9 19.8 21.9 22.2 22.9 22.4 22.5 22.8 20.7 17.5 16.4

Recognition

Winner in MIT’s Commercial &

Industrial Energy Efficiency Contest

THANKYOU!

Phone:

+91-7842095103

Email:

marketing@oorja.inWebsite:

www.oorja.in

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