Thermal Insulation for Energy Efficiency in Buildings in India · Consultant Green Consultant: CARBSE Roof– Over deck PUF Spray 45 mm thick ... Eicher HQ, Gurgaon . Case Studies

Thermal Insulation for Energy

Efficiency in Buildings in India

Climate map of India

Heat flow Trend

Electricity consumption by buildings in India

Effect of roof insulation

Benefits of insulation

Types of insulation

Application areas for insulation

Different application methods

Case studies

ECBC recommendations on insulation

Content


Heat flow Trend




Types of insulation



Case studies


Content

Five Climate Zones in India

ECBC refers to these and suggest different

compliance for different zones

Hot – Dry

Warm – Humid

Composite

Temperate

Cold

R value Specified for all zones (roofs &

walls)

Climate Map of India

Source: ECBC


Heat Flow Trend




Types of insulation



Case studies


Content

Heat Load Components:

Composite Climate (New Delhi)

Roof: 31%

Wall: 32%

Windows:

31%

Infiltration: 6%

*Direct heat gain from windows not accounted

Source : BEEP

Summer Heat Flow (May)

Weather Conditions

Temperature Min.: 18.7oC, Max.: 42.6oC, Avg.: ~32oC

Relative Humidity

Min.: 13%, Max.: 97%, Avg.: ~50%

Net heat flow per unit area

Roof (15 m2) 24.6 kWh/m2

Wall (47.6 m2) 8.1 kWh/m2

Window (8.4 m2) 43.3 kWh/m2

Infiltration (based on floor area 15 m2)

5.0 kWh/m2

Heat Load Components:

Warm-Humid Climate (Chennai)

Roof: 25%

Wall: 32%

Windows:

36%

Infiltration: 7%

Source : BEEP

Summer: Heat in-flow (May)

Weather Conditions

Temperature Min.: 22.5oC, Max.: 39.5oC, Avg.: ~31.5oC

Relative Humidity

Min.: 33%, Max.: 98%, Avg.: ~69%

Net heat flow per unit area

Roof (15 m2) 17.0 kWh/m2

Wall (47.6 m2) 7.3 kWh/m2

Window (8.4 m2) 44.5 kWh/m2

Infiltration (based on floor area 15 m2)

4.9 kWh/m2


Heat flow Trend

Electricity Consumption by buildings in India



Types of insulation



Case studies


Content

Air Conditioning

57%Lighting

22%

Ventilation fans

16%

Miscellaneous

5%

Energy Consumption by a general Air conditioned building

Source : ISHRAE

Building Energy Consumption

Total Primary Energy Supply & Use – India

(2011)

Coal 43%

Oil and Gas 29%

Nuclear 1%

Hydro+Solar

2%

Biomass+Waste 25%

TPES - 750 Mtoe

Source: International Energy Agency

Energy demand in the building sector

The building sector represents 34% of

the country’s final electricity

consumption.

Electricity use in commercial buildings

has been increasing much faster than in

other sectors of the economy.

Since 2000, electricity consumption in

the building sector has doubled

Source: Energy Statistics -2012, Ministry of Statistics and Program Implementation,

GoI & French Development Agency Paper 106, Issues in Electricity demand in USA

India Europe and China March 2011; indiatogether.org

11


Heat flow Trend


Effect of Insulation


Types of insulation



Case studies


Content

Typical summer day in Composite climate (Delhi)

With a 50mm Envelop insulation.

Impact of Roof & Wall Insulation

Source : Owens Corning

15.00

20.00

25.00

30.00

35.00

40.00

45.00

50.00

External

Uninsulated

Insulated

Maximum Temperature Difference is 13.9°C @ 14:hrs

School building in a typical summer day in Composite climate (Indore, M.P.)

With a roof of 40mm insulation with metal cladding

Up to 6-7oC cooler than ambient

Up to 4-5oC cooler than RCC

Impact of Roof Insulation

Source : BEEP


Heat flow Trend



Benefits of Insulation

Types of insulation



Case studies


Content

• Stop heat / cold ingress from outside

• Saves on fossil fuel

• Reduces emission of GHG.

• Lower energy losses; avoid the danger of oversized heating or cooling systems that works hard to compensate for the heat or cold losses through the building envelope.

Environmental

• Effective insulation lowers heating or cooling bills, thus no longer being affected by rising energy costs

• Maintains controlled temp. for longer periods.

Economical

• Human Comfort – improves the efficiency of occupier/user.

• Provides fungus-free and microbe-free healthier environ, due to absence of cold walls

Social

Insulation Benefits

Impact of Insulation:

Composite Climate (New Delhi) Summer: Heat in-flow (May)

Roof: 24.6 kWh/m2

Wall: 8.1 kWh/m2

Source: BEEP analysis

Roof: 2.1 kWh/m2

Wall: 2.3 kWh/m2

Business-as-usual construction Roof U-value: 4.2 W/m2.K Wall U-value: 2.1 W/m2.K

ECBC compliant roof & wall Roof U-value: 0.261 W/m2.K Wall U-value: 0.44 W/m2.K

Reduction in heat in-flow through roof ∼ 90% Reduction in heat in-flow through walls ∼ 70%


Heat flow Trend




Types of insulation



Case studies


Content

Fibrous /Mineral Insulation Materials :

•Rock wool

•Glass wool

•Slag wool

Rigid Insulations

•Extruded Polystyrene Foam

•Polyurethane Foam

•Polyisocyanurate Foam

•Expanded Polystyrene Foam

Efficient Insulation Products

PU/PIR XPS

EPS


Heat flow Trend


Effect of roof Insulation

Benefits of Insulation

Types of Insulation

Application Areas for Insulation


Case studies


Content

Roof Insulation (Over deck & Under deck)

Over deck Insulation:

PU Spray Insulation on roof

Over deck Insulation: Extruded

Polystyrene on Roof & Floor

Under deck Insulation:

Extruded Polystyrene

Over deck Insulation: XPS & PUF slabs

Wall Insulation (Internal & External)

Spray Insulation-

Interior Walls & Roof

External Wall Insulation with

Extruded Polystyrene

Curtain Wall Insulation Extruded

Polystyrene (External Walls)

Dry Wall

Insulation with

Mineral Wool


Heat flow Trend




Types of insulation



Case studies


Content

Various Application Methods

Floor Insulation Direct to Deck Metal Roof

Spray Foam Cavity Wall Insulation- Extruded

Polystyrene Inverted Roof Concept

Basement Insulation


PU External Roof & Wall Spray

Insulation

External Wall Insulation with

Rockwool slabs


PU External Thermal Insulation Composite System PU Roof Insulation with

water proofing membrane


Heat flow Trend




Types of insulation



Case studies


Content

Case Studies – Buildings Cont…

Net Zero Energy Building, CEPT University, Ahmedabad

Building

Specs.

Project

Design Team

Scope of Insulation Project

Status

Rating

No of stories:

4

Roof Area:

425 sq. m

Wall Area:

1200 sq. m

Architect:

VasuShilpa

Consultant

Green

Consultant:

CARBSE

Roof– Over deck PUF Spray 45 mm

thick

Wall – Insulation with XPS – 50 mm

First floor : Under deck - Insulation

with XPS – 50 mm

Ground Floor : Over deck -

Insulation with XPS – 50 mm

Civil work

completed


Sr.

No.

No. of Stories

Roof Area (Sqm)

Wall Area (Sqm)

Architect Green

Consultant

Scope of

Insulation

Project

Status

Rating

1 4-6;

10000;

13000

Hafeez

Contractor

EDIFICE

CRN

RSP

Multiple Roof– Overdeck

with XPS 75mm

thick

Wall – Insulation

with XPS – 50mm

Operationa

l

LEED

Platinum

Infosys Campus: Mysore, Hyderabad, Bhubaneswar, Bangalore,

Kochi, Trivandrum

http://1.bp.blogspot.com/-cq6x9e-ap2Q/TiUixayMU-I/AAAAAAAAFSI/41k3tuzqqvI/s1600/Infosys_mysore_campus_02.jpg


Sr.

No.

No. of Stories

Roof Area (Sqm)

Wall Area (Sqm)

Architect Green

Consultant

Scope of

Insulation

Project

Status

Rating

1 17

864

6084

Roof–

Overdeck with

Extruded

Polystyrene

75mm thick

Wall –

Insulation with

Extruded

Polystyrene –

75mm

Operational

GAIL, Noida


Sr. No. No. of Stories

Roof Area (Sqm)

Wall Area (Sqm)

Architect Green

Consultant

Scope of

Insulation

Project

Status

Rating

1 6;

15000;

26000

TRIL TRIL Roof– Overdeck

with XPS 75mm

thick

Wall – Insulation

with XPS – 25

mm

Operation

al

LEED

GOLD

Tata Consultancy Services, Gandhinagar

Case Studies - Buildings

Sr. No. No. of Stories;

Roof Area

(sq.m);

Wall Area

(sq.m)

Architect Green

Consultant

Scope of Insulation Project

Status

Rating

1 G+1

530.3

Sankalpan

Architects

Pvt. Ltd,

Mumbai

Spectral Roof Insulation

Material – 75 mm

Thick PIR Insulation

Exterior Wall

Insulation (Type 1) -

80 mm Thick PIR

Insulation

Exterior Wall

Insulation (Type 2) -

150 mm Thick PIR

insulation

Complet

ed

Platinum –

the highest

LEED rated

building @

2011

Bayer Eco Commercial Building Greater NOIDA


Sr.

No.

No. of Stories

Roof Area (Sqm)

Wall Area (Sqm)

Architect Green

Consultant

Scope of

Insulation

Project

Status

Rating

1 7;

1300;

3600

Romi

Khosla

Spectral Roof–

Overdeck PUF

Spray 40mm

thick & 40

kg/m3 density.

Wall –External

dry wall

Insulation with

rockwool slab-

50 mm thick &

48 kg/m3

density

Operation

al

Platinum

Eicher HQ, Gurgaon


Sr.

No.

No. of Stories

Roof Area (Sqm)

Wall Area (Sqm)

Architect Green

Consult

ant

Scope of

Insulation

Project

Status

Rating

1 7;

2640;

4685

Dipender Prasad

Architect +CPWD

Kalpakrit Roof– Overdeck

PUF Spray

40mm thick & 40

kg/m3 density

cavity.

Wall – Insulation

with rockwool

slab- 65 mm

thick & 64 kg/m3

density

Operation

al

Platinum &

GRIHA 5

Star

Indira Paryavaran Bhavan, Delhi


Sr. No. No. of Stories

Roof Area (Sqm)

Wall Area (Sqm)

Architect Green

Consultant

Scope of

Insulation

Project

Status

Rating

1 4;

800;

1200

Mindspace/TERI GRIHA Roof– Overdeck

PUF Spray 40mm

thick & 40 kg/m3

density cavity.

Wall – Insulation

with rockwool

slab- 50 mm thick

& 96 kg/m3

density

Operation

al

GRIHA 5

Star

TERI University, Delhi


Heat flow Trend




Types of insulation



Case studies


Content

Maximum U-factor is prescribed for the complete roof assembly.

Minimum R-value is prescribed for insulation alone (excluding air films)

Recommendations made for proper placement, installation and protection of

insulation

ECBC Requirements: Prescriptive (Roofs)

Source : ECBC Code

Maximum U-factor is prescribed for the complete wall assembly

Minimum R-value is prescribed for insulation alone (excluding air films)

ECBC Requirements: Prescriptive (Walls)

Source : ECBC Code

BEE and IPUA (India Polyurethane Association) have collaborated the

establishment of "India Insulation Forum (IIF)“ in 2013. The objective of IIF is

to enhance awareness of using thermal insulation in building envelope and

cold chain industry for energy conservation.

IIF also coordinate advocacy activities with Government bodies & nodal

agencies.

IIF is proposed to be represented by reputed companies making different

insulation materials used for energy efficiency in Buildings.

The IIF membership is open to all concerned with building insulation,

beginning with raw material suppliers, processors & applicators, builders &

contractors, architects, regulators and end users.

India Insulation Forum (IIF)

Thank You

Documents

Thermal Insulation for Energy Efficiency in Buildings in India · Consultant Green Consultant: CARBSE Roof– Over deck PUF Spray 45 mm thick ... Eicher HQ, Gurgaon . Case Studies