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From CM Desk Energy has become the lifeline of present civilization. India has

PROGRAMMES
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Renewable Energy Department, Haryana & HAREDA
Akshay Urja Bhawan
Institutional Plot No.1
Sector 17
Panchkula Pin: 134109
0172-2587233, 2587833..View more
0172-2564433
hareda@chd.nic.in
Brief Summary of ECBC

 

The Energy Conservation Building Code (ECBC) set minimum energy performance standards for commercial buildings. Under section 14 (p) of the Energy Conservation Act, 2001, Central Government has powers to prescribe ECBC for non-residential buildings, having connected load of 100 KW and above or a contract demand of 120 KVA and above or recommended built-up area of 1000 sqm and above. or building complex for efficient use of energy and its conservation. The state governments have the flexibility to modify ECBC to suit local or regional needs. Energy performance standards for the following building systems will be included in the ECBC:


1.                  Building Envelope

2.                  Heating Ventilation and Air Conditioning

3.                  Lighting

4.                  Service Water Heating

5.                  Electric Power and Distribution  

The salient features of the ECBC for the Composite Climate Zone are as under:

1.         Building Envelope:

            ECBC compliant design strategy for a building is as under:

 

Heat/Moisture Losses

Walls

Roof

Window

 

Minimize Conduction

Losses

Use insulation with

low U-value

Use insulation with

low U-value

Use material with low

U-factor

 

Minimize Convection

Losses & Moisture

Penetration

Reduce air leakage &

use vapor barrier

Reduce air leakage

& use vapor

Barrier

Use prefabricated

windows and seal the

joints between

windows and walls.

 

Minimize Radiation Losses

Use light colored

coating with high

reflectance

Use light colored

coating with high

reflectance

Use glazing with low

Solar Heat Gain

Coefficient (SHGC)

 

 i)          Roof Requirement:

Climate Zone

Hospitals, Hotels, Call Centres, (24-hours)

Other Building types (Daytime)

 

Maximum U-factor of

 the overall assembly

(W/sq.m-0 C)

Minimum R-value

of insulation

alone (W/sq.m-0 C)

Maximum U-factor

of the overall assembly

(W/sq.m-0 C)

Minimum R-value of insulation alone (W/sq.m-0 C)

Composite

U-0.261

R-3.5

U-0.409

R-2.1

 ii)         Wall Requirement:

Climate Zone

Hospitals, Hotels, Call Centres, (24-hours)

Other Building types (Daytime)

 

Maximum U-factor of the overall assembly (W/sq.m-0 C)

Minimum R-value of insulation alone (W/sq.m-0 C)

Maximum U-factor of the overall assembly (W/sq.m-0 C)

Minimum R-value of insulation alone (W/sq.m-0 C)

Composite

U-0.440

R-2.10

U-0.440

R-2.10

 i)  Glazing requirements: 

Climate

 

 

 

 

 

Maximum U-factor

 

 

 

 

 

Maximum SHGC WWR<40%

 

 

Maximum SHGC 40% <WWR<60%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Composite

3.3

0.25

0.20

3.3

0.25

0.20

Minimum Visible Light Transmittance

 Window –Wall-Ratio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Minimum VLT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

>30%

0.27

31%-40%

0.20

41%-50%

0.16

51%-60%

0.13

Defaults for Unrated Vertical Fenestration (Overall Assembly including the Sash and Frame)

 

Clear Glass

Tinted  Glass

Frame Type

Glazing Type

U- Factor(W/m2-0C)

SHGC

VLT

U-Factor

SHGC

VLT

All frame types

Single Glazing

7.1

0.82

0.76

7.1

0.70

0.58

Wood, vinyl, of fiberglass frame

Double Glazing

3.3

0.59

0.64

3.4

0.42

0.39

Metel and other frame type

Double Glazing

5.1

0.68

0.66

5.1

0.50

0.40

 Envelope Performance Factor Coefficients for Composite Climate (under review)

 

Daytime Occupancy

24- Hour Occupancy

U - Factor

 SHGC

 

U - Factor

 

SHGC

Mass Walls

6.01

--

13.85

--

Curtain Walls, Other

15.72

--

20.48

--

Roofs

11.93

--

24.67

--

North Windows

-1.75

40.65

-4.56

58.15

Non-North Windows

-1.25

54.51

0.68

86.57

Skylights

-96.35

311.71

-294.66

918.77

 

 

 

 

 

 

Comfort requirements and Physical manifestations in Buildings of Composite Climate Zone

Thermal Requirements

Physical Manifestation

 

Reduce Heat Gain in Summer and Reduce Heat Loss in Winter 

Decrease exposed surface area

Orientation and shape of building. Use of trees as wind barriers

Increase thermal resistance

Roof insulation and wall insulation

Increase thermal capacity (Time lag)

Thicker walls

Increase buffer spaces

 Air locks/Balconies

Decrease air exchange rate

Weather stripping

Increase shading

Walls, glass surfaces protected by overhangs, fins and trees

Increase  surface reflectivity

Pale color, glazed china mosaic tiles, etc.

Reduce solar heat gain

Use glazing with lower SHGC and provide shading for windows. Minimize glazing in East and West

Promote Heat Loss in Summer/Monsoon

Increase air exchange rate ( Ventilation)

Courtyards/wind towers/ arrangement of openings

Increase humidity levels in dry summer

Trees and water ponds for evaporative cooling

Decrease humidity in monsoon

Dehumidifiers/ desiccant cooling

Source:- Nayak and Prajapati (2206), Handbook on Energy Conscious Buildings.

 

2.         Heating, Ventilation and Air Conditioning (HVAC):

i)          Minimum Efficiency for Chillers:

 

 

 

 

 

Equipment Class

Minimum COP

Minimum IPLV

Test Standard

 

Air Cooled Chiller <530KW (<150 tons)

2.90

3.16

ARI 550/590-1998

 

Air Cooled Chiller>=530KW(>=150 tons)

3.05

3.32

ARI 550/590-1998

 

Centrifugal Water Cooled Chiller <530KW(<150 tons)

5.80

6.09

ARI 550/590-1998

 

Centrifugal Water Cooled Chiller >=530KW and <1050KW(>=150 tons and <300 tons)

5.80

6.17

 

 

Centrifugal Water Cooled Chiller >=1050KW(>=300 tons)

6.30

6.61

ARI 550/590-1998

 

Reciprocating Compressor, Water Cooled Chiller all sizes

4.20

5.05

 

 

Rotary Screw and Scroll Compressor, Water Cooled Chiller <530KW(<150 tons)

4.70

5.49

ARI550/590-1998

 

Rotary Screw and Scroll Compressor, Water Cooled Chiller>=530 and <1050KW (>=150 and <300 tons)

5.40

6.17

 

 

R    Rotary Screw and Scroll Compressor, Water Cooled Chiller>=1050KW(>=300 tons)

5.75

6.43

ARI 550/590-1998

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ii) Unitary Air Conditioning Equipment:

 

 Equipment Class

Minimum COP

Minimum IPLV

Test Standard

Unitary Air Cooled Air Conditioner >=19 and <40KW(>=5.4 and <11 tons)

3.08

 

ARI 210/240

Unitary Air Cooled Air Conditioner >=40 to <70KW(>=11 to <20 tons)

3.08

 

ARI 340/360

Unitary Air Cooled Air Conditioner >=70KW(>=20 tons)

2.93

2.99

ARI 340/360

Unitary Water Cooled Air Conditioner<19KW(<5.4 tons)

4.10

 

ARI 210/240

Unitary Water Cooled Air Conditioner>=19 and <40KW(>=5.4 and <11 tons)

4.10

+++

ARI

210/240

Unitary Water Cooled Air Conditioner>=<40KW (>=11 tons)

3.22

3.02

ARI 210/240

 

 3.    Lighting: 

       i) Lighting Power Requirement: 

Table 7.3.1 Interior Lighting Power-Building Area Method

 

Building Area Type

LPD (W/sq.m)

Building Area Type

LPD (W/sq.m)

 

Automotive facility

9.7

Multifamily

7.5

Convention Center

12.9

Museum

11.8

Court House

12.9

Office

10.8

Dining: Bar Lounge/Leisure

14.0

Parking Garage

3.2

Dinging: Cafeteria/Fast Food

15.1

Performing Arts Theater

17.2

Table 7.3.2  Interior Lighting Power –Space Function Method

 

Space Function

LPD (W/sq.m)

Space Function

LPD (W/sq.m)

 

Lobby

14.0

Hospital

 

For Hotel                                              

11.8

Emergency

29.1

For Performing Arts Theater

35.5

Recovery

8.6

For Motion Picture Theater

11.8

Nurse Station

10.8

 

ii)  Exterior Building Lighting Power:

 

Exterior Lighting Applications

Power Limits

Building entrance (with canopy)     

13 W/m2 (1.3 W / ft2) of canopied are

Building entrance (without canopy)

90 W/lin m (30 W/lin f) of door width

 

Building exit

60 W/lin m (20 W/lin f) of door width

Building facades

2 W/m2 (0.2 W/ ft2) of vertical facade area

iii)  Interior Lighting Power - Space Function Method:

 Space Function                               LPD (W/m2)

Space Function                   LPD (W/m2)

 

Office-enclosed

11.8

· For Reading Area

12.9

 

 

Office- open plan

11.8

Hospital

 

 

 

Conference/Meeting/Multipurpose

 

14.0

· For Emergency

29.1

 

 

Classroom/Lecture

Training

15.1

 For Recovery

8.6

 

 

Lobby*

14.0

·For Nurse Station

10.8

 

 

· For Hotel

11.8

· For Exam Treatment

 

16.1

 

· For Performing Arts Theater

35.5

· For Pharmacy

12.9

 

· For Motion Picture Theater

 

11.8

·   For patient Room

7.5

 

Audience/Seating Area*

9.7

·   For Operating Room

 

23.7

 

·For Gymnasium

4.3

·   For Nursery

 

 

6.5

 

· For Convention Center

7.5

.    For Medical

 

 

15.1

 

Space Function                        LPD (W/m2)

Space Function                                  LPD (W/m2)

 

Atrium –first three floors

6.5

·                                                 For Low Bay (<8m celling)

12.9

 

Atrium-each additional floor

2.2

·                                                  For High Bay (>8m ceiling)

18.3

 

Lounge/Recreation*

12.9

.  For Detailed Manufacturing

22.6

 

· For Hospital

8.6

.   For Equipment Room

12.9

 

Dining Area*

9.7

·   For Control Room

5.4

 

· For Hotel

14.0

Hotel/Motel Guest Rooms

11.8

 

· For Motel

12.9

Dormitory- Living Quarters

11.8

 

· For Bar Lounge/Leisure Dining

15.1

Museum

 

 

· For Family Dining

22.6

· For General Exhibition

10.8

 

· Food Preparation

12.9

·  For Restoration

18.3

 

Laboratory

15.1

Bank office- Banking Activity Area

16.1

 

Restrooms

9.7

Retail

 

 

Dressing/Locker/Fitting Room

6.5

 For Sales Area

18.3

 

Corridor/Transition*

5.4

· For Mall Concourse

18.3

 

· For Hospital

10.8

Sports Arena

 

 

·For Manufacturing Facility

5.4

· For Ring Sports Area

29.1

 

Stairs-active

6.5

· For Court Sports Area

24.8

 

Active Storage*

8.6

· For Indoor Field Area

15.1

 

·For Hospital

9.7

Warehouse

 

 

Inactive Storage*

3.2

·For Fine Material Storage

15.1

 

· For Museum

8.6

· For Medium /Bulky Material Storage

9.7

 

Electrical /Mechanical Facility

16.1

Parking Garage- Garage Area

2.2             

 

Workshop

20.5

Transportation

 

 

Convention Center- Exhibit Space

14.0

· For Airport- Concourse

6.5

 

Library

 

·  For Air/Train/Bus- Baggage Area

10.8

 

· For Card File & Cataloging

11.8

· For Ticket Counter Terminal

16.1

 

· For Stacks

18.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

      4.     Service Water Heating:

                Mandatory Requirements

 

      a)   Solar water heater or heat recovery for at least 20% of the design capacity

      b)   Minimum efficiency for service water heating equipment

      c)   Piping insulation