Presentation/slides engineering document

Slides presentation

1. Climate Smart Buildings (CSB)
Cluster cell Indore, Madhya Pradesh under Global Housing Technology
Challenge -India (GHTC-India)
THERMAL COMFORT IN AFFORDABLE HOUSING
Training D at Bhopal –22
nd
July 2022

2. ‘HousingforAll’by2022.
UndertheMission,MinistryofHousingandUrbanAffairs(MoHUA),providesCentral
AssistancetoimplementingagenciesthroughStatesandUnionTerritoriesforproviding
housestoalleligiblefamilies/beneficiariesby2022.
Addressingtheaffordablehousingrequirementinurbanareasthrough:
INTRODUCTION -MoHUA
Affordable Housing in
Partnership with Public & Private
Sectors
Promotionof
Affordable
Housing through
CLSS
Slum rehabilitation of Slum
Dwellers with participation of
private developers using land as a
resource.
Subsidyfor
Beneficiary-Led
individual house
construction/
enhancement.
In-situ Slum
Redevelopment
(ISSR) for Slums
MoHUA

3. INTRODUCTION -GIZ
•GIZisaninternationalcooperationenterprise
forsustainabledevelopmentwhichoperates
worldwide,onapublicbenefitbasis.
•GIZisfullyownedbytheGermanFederal
Government,GIZimplementdevelopment
programsinpartnercountryonbehalfofthe
GermanGovernmentinachievingits
developmentpolicyobjectives.
•Forover60years,theGIZhasbeenworking
jointlywithpartnersinIndiaforsustainable
economic,ecological,and social
development.
Energy
Environment,
Climate
Change and
Biodiversity
Sustainable Urban and
Industrial Development
Sustainable
Economic
Development
GIZ

4. M.P.
MH.
TG.
CG.
GOA
HEAD OFFICE of CENTRAL CLUSTER
Indore, Madhya Pradesh
known as ‘Central Cluster Building Cell’
(alias CSB Cell)
Map highlighting
the States, under
Central Cluster
TheClimateSmartBuildings(CSB)
programisalignedwiththecommitmentsmadeby
theIndianGovernmenttomeetitsobjectives
submittedunderSDG11.
Indo-GermanEnergyprogramme(IGEN’s
Programme),ClimateSmartBuildings(CSB)proposes
toextendtechnicalassistanceandcooperationforthe
followings:
•DevelopingactionplanforThermalComfortto
buildClimateResilientBuildingsformassscale
application
•ImplementationofGlobalHousingTechnology
Challenge-India(GHTC-India)
CLIMATE
SMART
BUILDINGS
TASKS PLANNED WITH MoHUA

5. 9.INDUSTRY, INNOVATION AND
INFRASTRUCTURE
Build resilient infrastructure, promote
inclusive and sustainable industrialization, and
foster innovation
DESIGN
CONSTRUCTION
POST
OCCUPANCY
(O & M) INTEGRATION IN BY
-
LAWS
AIM & CONCEPT
Houses for
EWS
Climate
Resilience
11.SUSTAINABLE CITIES AND COMMUNITIES
Make cities and human settlements
inclusive, safe, resilient, and sustainable
13. PROTECT THE PLANET
Take urgent action to combat climate
change and its impacts
7 AFFORDABLE AND CLEAN ENERGY
Ensure access to affordable, reliable,
sustainable, and modern energy for all
Thermal
Comfort

6. Work Package 1:
Facilitate
implementationand
monitoringofLight
HouseProjects(LHPs)
Work Package 2:
Technicalassistanceto
enhance thermal
comfortinupcoming
DemonstrationHousing
Projects(DHPs)and
ARHCs (Affordable
rental housing
complexes)andother
Public/Privatehousing
projectsintheCentral
Cluster
Work Package 3:
Inclusionofclimate
resilienceandthermal
comfortrequirements
inbuildingbyelawsand
Local Government
frameworkinCentral
Cluster
CSB CELL -WORK PACKAGES
Integration
in
Bye-laws
0-3MONTHS
3-6MONTHS 6-18 MONTHS
Work Package 4:
Capacitydevelopment
ofGovtofficialsand
privatestakeholderson
thermalcomfortinthe
CentralCluster

7. New age innovative technologies along with the 6 LHP construction technologies
focusing on -efficiencyinconstruction,mainstreaming & replicationof
technologies.

8. LHP INTRODUCTION
LHPsshallserveasLIVELaboratoriesfordifferentaspectsofTransferoftechnologies
Map showing six different LHP Locations
6 LHP ACROSS INDIA

9. 6 LHPs Explained Via Video

10. 6 LHPS –FOCUSES ON
LHP
Speedy
Economic
Better
Quality and
sustainable
Live
laboratory
Learning
and
Replication
Mass
Housing
Transfer of
technologies
Thermal
Comfort

11. LHP INDORE
N

12. Project Details
Land Area –41920 sqm
Net Plot Area –34276
sqm
No’s of Dwelling Unit –
1024
No’s of Tower –08
No’s of Floor –SF + 08
No’s of DU / Tower –128
Community Hall –169.5
sqm
Key Highlights
Technology –Pre-
Fabricated Sandwich
Panel & PEB Structure
Project Start Date –01-
01-2021
Project Expected End
Date –31-03-2022
Amenities –
Rain Water Harvesting
Rooftop Solar Power
System
Fire Equipment (s)
Elevator / Lift
Emergency Power Back-
up
Sewage Treatment Plant
Central Waste Collection
Plant
LHP INDORE

13. LHP INDORE -TECHNOLOGY
StructuralSystem–PreEngineeringBuilding
Slab-DeckSheetSlab
WallingSystem-Prefabricatedsandwichpanelsystem
PEB STRUCTURE DECK SHEET SLAB
PREFABRICATED SANDWICH PANEL WALLING

14. PEBERRECTION

15. PEBERRECTIONExplainedViaVideo

16. •WithPre-engineeredsteelbuildingsystems,multi-storiescannowbescriptedintheshortest
“set-up”time
•SpeedinConstruction
LHP INDORE -TECHNOLOGY
PEB STRUCTURE
Lifting
Bolting
Assembled Structure

17. LHP INDORE -TECHNOLOGY
DECK SLAB

18. LHP INDORE -TECHNOLOGY
Technology information being explained via Video

19. EPS SANDWICH PANEL MANUFACTORING PROCESS

20. EPS SANDWICH PANEL RAW MATERIALS
Fly ash

21. EPS SANDWICH PANEL -FIXING TOOLS

22. EPS PANEL PERFORMANCE APPRAISAL CERTIFICATE

23. EPS SANDWICH PANEL -PANEL SIZES

24. EPS PANEL INSTALLATION Via Video

25. •SpeedinConstruction
•Nouseofwaterincuring
•Panelsbringresourceefficiency,better
thermalinsulation,acoustics&energy
efficiency.
LHP INDORE –TECHNOLOGY ADVANTAGES

26. 1.Light weight and cost effective
2.Easy and faster construction
3.Fireproof
4.Water proof and damp proof
5.Non-toxic & environment-friendly
6.Energy saving & environment-friendly
7.Water saving due to dry construction
8.Smooth and flat surface, thus no plastering needed
9.High sound insulation
10.Cost effective
11.Ground staff optimization
12.Increase in carpet area up to 15% which saves money
Fast and Easy Construction
FireResistanceTest
Strength Test
LHP INDORE –TECHNOLOGY ADVANTAGES
Energy saving by
thermal resistance
Recyclable
Eco friendly
dry construction

27. LHP INDORE

28. SESSION :1 THERMAL COMFORT
Introduction:ThermalComfort for Affordable Housing
Session1:ThermalComfort
a)NeedandImpact
b)ThermalcomfortinAffordableHousing
c)Passivestrategies&BuildingPhysics
d)CaseStudies

29. Thermalcomfortistheconditionofmind
thatexpressessatisfactionwiththe
thermalenvironmentandisassessedby
subjectiveevaluation(ANSI/ASHRAE
Standard55)
Thermalcomfortisdifficulttomeasure
becauseitishighlysubjective.Itdepends
ontheairtemperature,humidity,radiant
temperature,airvelocity,metabolicrates,
andclothinglevels.
THERMAL COMFORT

30. https://www.mckinsey.com/business-functions/sustainability/our-insights/climate-risk-and-response-physical-hazards-
and-socioeconomic-impacts
Impact of Heat-wave
Impact on working hours
NEED FOR THERMAL COMFORT AND HOW IT IMPACT US –QUALITATIVE AND QUANTITATIVE

31. Source Biannialupdate report India
Alackofthermalcomfortmakesus
feelstressed,annoyed,distracted,feel
sleepy,tiredandlackingconcentration.
Inturn,thermalcomfortinevitablyhas
animpactonwell-being,productivity
NEED FOR THERMAL COMFORT AND HOW IT IMPACT US –QUALITATIVE AND QUANTITATIVE

32. IndiaCoolingActionPlan:ResidentialBuildingrecommendations
•Nation-wideadoptionandenforcementofECBCforbothcommercialandresidentialsectors
•Adoptionatthemunicipalandurbanandlocalbodylevelandthroughdevelopmentofcity
levelaction plans
•Aggressivemarketawarenesscampaignstosensitizeboththeconstructioncommunityas well
as the userstowardsthemultiplebenefitsof efficientbuildings
India Cooling Action Plan

33. PassiveDesign
Designthatleverages climatologicallyresponsivedesigntoencouragenatural
heating/cooling,ventilation,andlighting.
ActiveDesign
Designthatrelieslargelyonmechanical/electricalsourcesofheating/ cooling,
ventilation,andlighting.
MEASURES TO IMPROVE THERMAL COMFORT VIA DESIGN
Passivedesignneedsactiveusers.
Activedesignneedspassiveusers.

34. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
•FORM & ORIENTATION OF BUILDING BLOCKS
•FENESTRATION
•SHADING OF OPENING /WINDOWS
•DAYLIGHTING
•NATURAL VENTILATION
•VEGETATION

35. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
ORIENTATION OF BUILDING BLOCKS:
Source:NZEB

36. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
Source:NZEB
ORIENTATION OF BUILDING BLOCKS

37. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
FORM OF BUILDING BLOCKS:

38. •Maximumdaylight
•Properventilation
UDAAN, low cost mass housing project at Mumbai
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
ORIENTATION OF BUILDING BLOCKS:
Source:NZEB
TheOrientationcanalterthethermalcomfortupto–9%astheareaofthewindfacingwall
varieswiththeorientation

39. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
Orientation and form
•In extreme climatic condition compact planning is more preferable
•Minimising the perimeter to area ratio of building form, building performs better in terms of thermal comfort
•Compact forms gain less heat at day time and loss heat during night time
Minimizingthesurfaceareatovolumeratiominimizesheattransfer.

40. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
Fenestration
AfenestrationsystemwithlowU-valueandlow
effectiveSHGCcanresultinreductionof
heatingandcoolingdemandby6-11%in
moderateclimateandbetween8-16%inhot
humid,hotdry,andcompositeclimates.
Source:NZEB
Fenestration type

41. MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
SHADING OF OPENING /WINDOWS

42. Use of shading device at Palace of Assembly, Chandigarh
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
SHADING OF OPENING /WINDOWS
Source:NZEB
Solarshadingdeviceshelps
•Diffusinglight
•Controlheat
•Improvingdaylight
Comfortableliving

43. DAYLIGHTING
•Designeddaylightingfeaturesenhance
1.Indoorenvironmentalquality,
2.Buildingoccupantperformance
DaylightingandShadingatAranyaHousing,Indore
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
Source:NZEB
Daylightingcanimpacttheenergyusebyreducing
thelightingenergydemandupto20-30%.

44. NATURAL VENTILATION
Typesofopeningandtheir
location
Crossventilation
toallowmaximumairflow
insidethespace
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
Source:NZEB
Natural ventilation helps in
reducing mechanical cooling
load of the building

45. Horizontal placing of openings and internal partitions can alter the direction and spread of air stream
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
NATURAL VENTILATION

46. Treesandshrubscreatedifferentairflow
patterns,provideshadingandkeepthe
surroundingscoolerinwarmweather.
Vegetationcanbeusedforenergy
conservationinbuildingsinthefollowingways:
•Shadingofbuildingsandopenspacesthrough
landscaping
•Roofgardens(orgreenroofs)
•Shadingofverticalandhorizontalsurfaces
(greenwalls)
•Bufferagainstcoldandhotwinds
•Changingdirectionofwind
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
VEGETATION

47. An increase in
urbanvegetationtoreduce
urbanheatandimprove
outdoorthermalcomfort.
VEGETATION
Community,Gary Horton,Landscape Development
MEASURES TO IMPROVE THERMAL COMFORT
passive design strategies for affordable housing
Source:NZEB
Treesalsoreduceambient
airtemperaturedueto
evapo-transpiration.
Study shows that ambient air under a tree
adjacent to the wall is about 2 –2.5°C lower
than that for unshaded areas.

48. THERMAL COMFORT IN AFFORDABLE HOUSING
75.00
70.00
65.00
60.00
55.00
ThermalcomfortperformnaceinNon-ACspacesforvarious
80.00
strategiesinWarm& HumidClimate
designcase CMU wall
masonry
highSRIroof DGUglassonfullshadingofP1+P2+P3+P4
window window
Strategies
C
o
mfo
rt
H
o
u
rs(%)
Parametric
simulation
Parametric
Thermalcomfort
(%)
Increment in thermal
comfort(%)
P0 designcase 61.15 0.00
P1CMUwallmasonry 63.70 2.55
P2 highSRIroof 72.25 11.10
P3DGU glassonwindow 63.65 2.50
P4fullshadingofwindow 66.99 5.83
P5 P1+P2+P3+P4 78.14 16.99

49. CASE STUDY

50. CASE STUDY -SMARTGHARIII,RAJKOT
Source:BEEP
•Sitearea:17,593m2
•Built-uparea:57,408m2
•Numberofdwellingunits(DU):
1176(All1BHK)
•11residentialtowers :Stilt +7
KeyFeatures
•Sensitivelydesignedwindow
shadestoreduceheatgainswhile
improvingdaylight.
•Use ofa fan-servicedventilation
shafttoimproveairquality inside.
Outcomes
•Reducedpeaksummerroom
temperatureby>5°C
•Increasednumberof comfortable
hoursfrom~2600hoursto~6300
hours.
Project:AffordablehousinginRajkotunderPMAYUntenableSlum Redevelopment.

51. CASE STUDY -RAMBAUGH,BURHANPUR
Source:ParekhCollaborative
A residence which has been
designed to remaincool
withouttheuseofanair
conditioner.
KeyFeatures
•mutualshading
•optimal
building
orientation

52. CASE STUDY -KANCHANJUNGA APARTMENTS
•Architect:Charles Correa
•Location: Bombay, India
•Completed on: 1983
•Building Type: Skyscraper multi-family
housing
•Construction System: Concrete
•Floors: 32
Key Features
The main living spaces with an enclosed
verandah whilst turning that buffer zone into
a garden, thriving on the problem. Because of
climatic considerations with existing views,
the massing settled upon a configuration
facing east and west

53. Session2:ThermalComfortmodels
a)ThermalComfortstandards
1.IMAC
2.ASHRAE
b)Effectofmaterials on thermalcomfort
Thermal Comfort Models

54. EXISTING STANDARDS FOR IMPROVING THERMAL COMFORT

55. THERMAL COMFORT IN AFFORDABLE HOUSING

56. EXISTING STANDARDS FOR IMPROVING THERMAL COMFORT
According to the IMAC model,neutral
temperature in naturally ventilated
buildings varies from 19.6 to 28.5 °C for
30-day outdoor running mean air
temperatures ranging from 12.5 to 31
°C.

57. EXISTING STANDARDS FOR IMPROVING THERMAL COMFORT
ASHRAE-55

58. EXISTING STANDARDS FOR IMPROVING THERMAL COMFORT
Eco-NiwasSamhita2018(BEE,2018)isthenewEnergyConservationBuildingCodefor
ResidentialBuildings(ECBC-R)whichhasfollowingprovisions:
1.Tominimizetheheatgainincoolingdominatedclimateorheatlossinheatingdominated
climate,
a.Throughthebuildingenvelope(excludingroof):
i.MaximumRETVforcoolingdominatedclimate(CompositeClimate,Hot-Dry
Climate,Warm-HumidClimate,andTemperateClimate)
ii.MaximumU-valueforthecoldclimate
b.ThroughtheRoof:MaximumU-valueforRoof
2.Fornaturalventilationpotential
a.Minimumopenablewindow-to-floorarearatiowithrespecttotheclimaticzone
3.Fordaylightpotential
a.Minimumvisiblelighttransmittancewithrespecttowindow-to-wallratio
Thiscodefocusesonbuildingenvelopeandaimstoimprovethethermalcomfortandreduce
theenergyrequiredforcoolingandlightinginResidentialbuildings.
Eco-NiwasSamhita(Energy Conservation Building Code for Residential Buildings)

59. EFFECT OF MATERIALS ON THERMAL COMFORT
Roof
Fenestrationfloor
Wall
Buildingconsistofwall,roof,fenestration,
floor,skylight,columns,beams,doors
Forthesamewedorequiredifferentmaterials
tofulfiltheuserrequirementssuchas
aesthetics,safety,visibility,etc.
CONDUCTION
Transfer of heat through a
medium, in case of buildings it is
mostly air
Energy that is radiated in form
of rays/ waves
Transfer of heat from one
material to another, through
direct contact
CONVECTION
RADIATION
Above image is only for illustration

60. EFFECT OF MATERIALS ON THERMAL COMFORT
Thermal transmittance U-value
•Heat transfer due to temperature
difference, inside & outside
•Heat transmission in unit time through
unit area of a material or construction
and the boundary air films, induced by
unit temperature difference between the
environments on each side
•Unit of U value is W/m²k.
Indoor Space
High U-Value
Indoor Space
Low U-Value
For External Wall
•Increase wall thickness
•Insulations over walls
•Cavity
For Roof
•Reflective paints
•Roof garden
•Insulation
•Reflective tiles-China Mosaic

61. EFFECT OF MATERIALS ON THERMAL COMFORT
Before selecting insulation material for a building, the following factors need to be considered:
✓The climatic conditions of the region
✓The material flammability in case of an accident
✓Material toxicity
✓Ease of replacement of the material
✓Material affordability
✓Material durability
✓Ease of installation
Comparison of commonly used insulation material

62. Thus, the lower the U-value, the lower the rate of heat transfer, and the better the
insulating property of the element
1.715
1.673 1.67
1.559
1.188
0.907
0.22
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Glass fibre
reinforced
Gypsum panel
with RCC &
non..
Rattrap bond
wall
Brick wallGlass fibre
reinforced
Gypsum panel -
Unfilled
Light Gauge
framed steel
structure with
EPS
Reinforced EPS
core Panel
system
Sandwich Panel
System
U-Value (W/m²K.)
Optimum U value
Enhance Thermal Comfort
@source :CRDF Document of CEPT
MATERIAL CHARACTERISTICS FOR BETTER THERMAL COMFORT

63. Session3:EcoNiwas Samhita
EcoNiwasSamhitaPart 1&2, Overviewandits rolein ThermalComfortand
Energy Efficiency inaffordablehousing

64. •Majority (~90%) of the households does not have access to air-conditioning
•The maximum air temperature limit for thermal comfort (with fan) is around 32-34
o
C
[NBC]
•As room air temperature and the wall surface temperatures approach 35
o
C, then the
ability of the human body to loose heat reduces drastically.
•Thermal discomfort results in
–Loss of concentration, nausea or irritability, muscle cramps or weakness, headache, fatigue, etc.
–Negative impact on health of the occupants, children unable to study, loss of income due to poor
productivity
Thus while designing houses care should be taken that the peak indoor operative
temperatures does not exceed comfort band during peak summer period. This is the
basic strategy for curtailing the growing use of air conditioning to alleviate discomfort.
Thermal Comfort -Health & Socio-Economic Impacts

65. •Residential buildings consumes around 255 TWhelectricity in 2017, the electricity
consumption in residential buildings is expected to multiply by more than 3X and reach
around 850 TWhby 2030. Increased penetration of air-conditioning in residential
building is the key reason for this growth.
•Residential buildings will become the largest end-user of electricity in the country
accounting for 38% of the total electricity consumption.
Residential Buildings: Fast Growth in Electricity Consumption

66. •The Bureau of Energy Efficiency (BEE) has adopted a multi-
pronged approach to conserve energy in building sector:
–Energy Conservation Building Code (ECBC) for commercial
buildings (2007 & 2017).
–Star rating system for various types of commercial buildings
–Star rating for appliances, which cover air conditioners, fans,
lighting, etc.
•BEE now plans to aggressively push for energy efficiency in
new housing through the Energy Conservation Building
Code for Residential Buildings (Parts 1 & 2)and through
the Residential Building Labelling Programme.
Building Energy Efficiency -Overview

67. •Eco-Niwas Samhita 2018 (Part I: Building Envelope) is the new
Energy Conservation Building Code for Residential Buildings;
launched by Ministry of Power (MoP) on 14 December 2018.
Buildingenvelopeprovisionsto
improvethermalcomfortand
reduceenergyconsumption
Eco-Niwas Samhita 2018

68. •Majority(~90%)ofthehouseholdsdoesnothaveaccesstoair-conditioning
•Themaximumairtemperaturelimitforthermalcomfort(withfan)isaround32-34
o
C
[NBC]
•Asroomairtemperatureandthewallsurfacetemperaturesapproach35
o
C,thenthe
abilityofthehumanbodytolooseheatreducesdrastically.
•Thermaldiscomfortresultsin
–Lossofconcentration,nauseaorirritability,musclecrampsorweakness,headache,fatigue,etc.
–Negativeimpactonhealthoftheoccupants,childrenunabletostudy,lossofincomeduetopoor
productivity
Thuswhiledesigninghousescareshouldbetakenthatthepeakindooroperative
temperaturesdoesnotexceedcomfortbandduringpeaksummerperiod.Thisisthe
basicstrategyforcurtailingthegrowinguseofairconditioningtoalleviatediscomfort.
ThermalComfort-Health&Socio-
EconomicImpacts

69. •Residentialbuildingsconsumesaround255TWhelectricityin2017,theelectricity
consumptioninresidentialbuildingsisexpectedtomultiplybymorethan3Xandreach
around850TWhby2030.Increasedpenetrationofair-conditioninginresidential
buildingisthekeyreasonforthisgrowth.
•Residentialbuildingswillbecomethelargestend-userofelectricityinthecountry
accountingfor38%ofthetotalelectricityconsumption.
ResidentialBuildings:FastGrowth
inElectricityConsumption

70. •The residential buildings expected to increase
2 times in terms of floor area by 2030.
•12 million new affordable homes in urban
areas under PMAY by 2022.
–A significant percentage is in the form of high
density, multi-storey residential blocks.
–Very low penetration of air conditioning, though
majority have ceiling fans.
–Ensuring thermal comfort to occupants through
design is of prime importance
Residential Buildings Construction
12 Million
New
Affordable
Houses in
Urban Areas
2x increase

71. Adaptive Comfort
India
Model for
Adaptive
Comfort
Standard of adaptive thermal comfort
based on Indian specific model
guideline (currently for office /
commercial buildings)
Applicable for air conditioned, naturally
ventilated and mixed-mode buildings
Includes the wide temperature ranges
in all Indian climate zones
Shows 90% and 80% acceptability
bands

72. Hot & Dry Climate
26.3
26.5
28.6
31.3
33.2
33.7
32.1
30.7 30.8
31.4
30.1
28.1
21.5
21.7
23.8
26.5
28.5
28.9
27.4
25.9 26.0
26.7
25.4
23.4
10.0
15.0
20.0
25.0
30.0
35.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Indoor Operative Temperature (˚C)
Ahmedabad: IMAC Band, Naturally Ventilated

73. 22.7
23.6
26.1
29.7
32.5
33.0
32.2
31.7
31.4
30.5
28.1
24.9
17.9
18.9
21.3
24.9
27.7
28.2
27.4
26.9
26.7
25.7
23.3
20.1
10.0
15.0
20.0
25.0
30.0
35.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Indoor Operative Temperature (
°
C)
Delhi: IMAC Band, Naturally Ventilated
Composite Climate

74. 28.8
29.4
30.3
31.4
32.6 32.9
31.9
31.5 31.3
30.8
30
29.2
24
24.7
25.6
26.6
27.8
28.1
27.1
26.7 26.5 26
25.3
24.5
10
15
20
25
30
35
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Indoor Operative Temperature (
°
C)
Chennai: IMAC Band, Naturally Ventilated
Warm and Humid Climate

75. 26.8
27.8
29
30.2
30.2
29.4
28.5
28.1 28.2 28.1 27.7
26.8
22.1
23
24.3
25.5 25.5
24.6
23.7
23.4 23.4 23.3
22.9
22.1
10
15
20
25
30
35
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Indoor Operative Temperature (
°
C)
Bangalore: IMAC Band, Naturally Ventilated
Temperate Climate

76. 17.5 17.7
19.1
21.8
24.3
26.0
28.1
28.5
27.4
24.9
21.4
18.6
12.8
12.9
14.3
17.0
19.6
21.3
23.4
23.7
22.6
20.1
16.6
13.9
10.0
12.0
14.0
16.0
18.0
20.0
22.0
24.0
26.0
28.0
30.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Indoor Operative Temperature (
°
C)
Srinagar: IMAC Band, Naturally Ventilated
Cold Climate

77. •TheBureauofEnergyEfficiency(BEE)hasadoptedamulti-
prongedapproachtoconserveenergyinbuildingsector:
–EnergyConservationBuildingCode(ECBC)forcommercial
buildings(2007&2017).
–Starratingsystemforvarioustypesofcommercialbuildings
–Starratingforappliances,whichcoverairconditioners,fans,
lighting,etc.
•BEEnowplanstoaggressivelypushforenergyefficiencyin
newhousingthroughtheEnergyConservationBuilding
CodeforResidentialBuildings(Parts1&2)andthrough
theResidentialBuildingLabellingProgramme.
BuildingEnergyEfficiency-Overview

78. ECO NIWAS SAMHITA TOOL Via Video

79. PART One & TwoPartsof
ENS:Envelope&Active
Measures
EcoNiwas Samhita 2021
CodeComplianceandPart2
EcoNiwas Samhita 2018
Part1:BuildingEnvelope

80. Approach for reducing energy
consumption in building
Business As
Usual
Passive
Measures
(Orientation,
WWR, glazing,
Shading,
Insulation,
natural
ventilation,
daylight…)
Active
Measures
(Proper design
and sizing of
lighting and
cooling
system, high
star rated
equipment /
appliance,
assisted
ventilation,…)
On-site
Renewable
Energy
Generation
Energy Consumption
100%
Net
Energy
Minimize heat gain/loss,
Improve Daylight &
Natural Ventilation
Potential
Efficient cooling &
lighting system
Part I: Building
Envelope
Part II: Electro-Mechanical Systems
Minimize energy
requirements
Efficient systems and
operations
Use renewable
energy
Residential
Labelling
Program

81. Energy Conservation Building
Code-Residential: Objective
•Reduces Heat Gains/Loss
•Improve Natural
Ventilation & Daylighting
Potential
Improved thermal comfort & reduced energy
consumption
PROVISIONS FOR BUILDING
ENVELOPE

82. Eco-Niwas Samhita 2018: Code
Provisions
Code Provisions
Natural Ventilation
I. Minimum openable window-to-floor
area ratio w.r.t. climatic zone
Daylight
II. Minimum visible light transmittance
w.r.t. window-to-wall ratio
Heat gain / loss
Roof
III. Maximum U-value for all
climatic zones
Envelope
(excluding roof)
IV. Maximum Residential
Envelope Transmittance
Value (RETV) for all climatic
zones, except cold
V. Maximum U-value for cold
climate

83. Resources
•Code document: https://www.beepindia.org/wp-content/uploads/2013/12/ECBC_BOOK_Web.pdf
•https://beeindia.gov.in/content/ecbc-residential
•Brochure: https://www.beepindia.org/wp-content/uploads/2013/12/Brochure.pdf
•Compliance check tool: https://www.beepindia.org/wp-
content/uploads/2013/12/EcoNiwasSamhita_ComplianceCheckTool.zip
•Film: English short version (https://www.youtube.com/watch?v=zg515mlU0dc)
•Film: English long version (https://www.youtube.com/watch?v=EG44gdSuWNE)
•Film: Hindi short version (https://www.youtube.com/watch?v=nyweHmqAPxw)
•Film: Hindi long version (https://www.youtube.com/watch?v=LEAb-iviwRc)
•ECBC-R Compliance tool video tutorial: https://www.youtube.com/watch?v=2SQyKekxpiM
•Support email: [email protected], [email protected], [email protected]

84. Combined heat gains from the
building envelope (except roof)
Conduction
through
opaque
surfaces
Conduction
through
non-opaque
surfaces
Solar
radiation
through
non-opaque
surfaces
Conduction
through roof
RETV
Walling material
& construction
(U value of walls)
Windowto wall
ratio
Glass
(U value)
Glass
(SHGC value)
Shading of
openings
Direction of
wall/openings
RETV
RETV: Residential Envelope Transmittance Value

85. •Provision: RETV ≤ 15 W/m
2
. (Composite Climate, Hot-Dry Climate, Warm-Humid Climate, and Temperate
Climate)
•RETV is the net heat gain rate (over the cooling period) through the building envelope (excluding roof) of the
dwelling units divided by the area of the building envelope (excluding roof) of the dwelling units.
IV. Residential envelope transmittance value (RETV) for building envelope
(except roof) for four climate zones, except cold
Dependent on wall
properties
Dependent on window
properties
Dependent on window
properties & shading
�,�,�: coefficients, based on
climatic zone
??????
??????��????????????��??????: envelope area (excluding
roof) of dwelling units (m
2
)
??????
��??????��??????
??????
:areas of wall / opaque
part (m
2
)
??????
���−��??????��??????
??????
: areas of glass /
non-opaque part (m
2
)
??????
��??????��??????
??????
: thermal transmittance
values of wall / opaque part
(W/m
2
.K)
??????
���−��??????��??????
??????
: thermal
transmittance values of glass /
non-opaque part (W/m
2
.K)
??????��??????
??????�: equivalent solar heat

86. Coefficients of RETV Formula

87. Non-opaque Area & Envelope
Area (Excluding Roof)
Non-opaque Area Envelope Area (Excluding Roof)
Non-opaque area:
100% opening area
Non-opaque area:
33.3% opening area
*Frame area is not taken in calculation
Non-
opaque
area
Envelope area =
Total wall length (m), exposed to ambient x
Total wall height (m), exposed to ambient
Exposed areas of common spaces
(stairwells, lobbies etc.) and un-
exposed walls of the units (facing
corridors etc.) are not included.

88. SOURCE: Bureau of Indian Standards (1988), Handbook on Functional Requirements of Buildings (Other than Industrial Buildings) (SP :41)
14ECBC Training Workshop: BuildingEnvelope

90. The schematic diagram and
site installation of roof
insulation is shown below:

91. Thefigureshownbelow
depictstheschematic
workingofadouble
reflectivewindowpane:

92. The purpose of Eco Niwas Samhita
2021
The code applies to –
•Residential buildings built on a
plot area of ≥ 500 m2
•Residential part of Mixed land-
use building projects, built on a
plot area of ≥ 500 m2 .
COMPLIANCE
APPROACH
PRESCRIPTIVE
POINT BASED
APPRAOCH
ENS CODE COMPLIANCE
Compliance Approaches

93. ENS SIMULATION TOOLS

94. ENS TOOLS ECONIWAS 2.0 -INTRODUCTION
•Building simulation allows engineers and architects to address key aspects of building performance
throughout the whole building life cycle from early design stages through construction and even for
major energy retrofitting.
•Building simulation is a way to test how elements of building design will perform under real-world
conditions
•BasicTool
•Advanced Tool
•EnvelopeOptimizationTool
https://www.econiwas.com/tools.php

95. BasicTool:
Quickevaluationplatformforhomeowners,contractorsandbuildersaliketorapidlyevaluatetheproject’s
preliminarydesignintentonthescaleofenergyefficiency,carbonfootprintandmonetarysavingswiththe
selectedprojectlocation,userspecifiedareaandorientation,buildingenvelope(wall,roof&window),Air-
conditioningandVentilationtechniques.
ECONIWAS 2.0 -MODULES

96. QuickandEasyInputsfordefiningprimaryinformationofBuildingincludinglocation,shading,areaandorientation.
ECONIWAS 2.0 –BASIC TOOLS
Most
interactive
draganddrop
featuresto
select and
installenergy
efficient
parametersin
buildingdesign
ReadyreferenceontheeffectonEPIofthedesign as
comparedtoconventional(baseline)design
Quick inference
on the impact
of selected
design features
on the energy,
environment
and monetary
level.
Oneclickexportof
resultstoPDFfile

97. Onthesubmissionofthe
form,thetoolperformsthe
energysimulationusing
energyplusserver-side
simulationplatformto
predicttheEPIandRETV
valuesofthedesigned
building.
Theuserhastheoptionto
exporttheresultsinPDF
formatforlateruse,using
the“DownloadReport”
buttonontheresultspage.
ECONIWAS 2.0 –ADVANCED TOOL –RESULTS
ThetoolalsopredictstheAnnual
CO2generation,AnnualOperational
costofthedesignandAnnuallife
cyclecostoftheprojectbasedon
theinputsgivenbytheuser

98. Onthesubmissionoftheform,
thetool performsthe
optimizationusingenergyplus
server-sidesimulationplatformto
predicttheoptimizedU-value,
SHGCforenvelopecomponents
(wall,roofwindows)aswellas
thicknessofinsulationforwall
androofassemblies.Theuseralso
hastheoptiontoexportthe
resultsinPDFformatforlateruse,
usingthe“DownloadReport”
buttonontheresultspage.
ECONIWAS 2.0 –ENVELOPE OPTIMIZATION TOOL –RESULTS

99. Project Details
Warm and Humid Climate
Composite
Climate
P1 P2 P3 P4 P5 P6 P7 P8
Number of storey 19
storey
4 storey2 storey 15
storey
18
storey
15
storey
6 storey 26
storey
Orientation* E-W N-S NW-SE NW-SE N-S N-S E-W E-W
* Longer sides facing
Chennai Pune Thane Mohal
i
Ghaziab
ad
8 storey8 floors
6 storey
8 floors8 floors
7 floors 7 floors
2 floors
4 floors
8 floors

100. Key Building Envelope
Construction Details
Brick wall with
air cavity
U
wall
1.2
W/m
2
.K
U
wall
0.8
W/m
2
.K
Monolithic concrete wall
U
wall
3-3.2
W/m
2
.K
Fly ash brick
U
wall
2.6
W/m
2
.K
U
wall
0.9
W/m
2
.K
Industrial
slag brick
AAC blocks
P1 P2 P8 P3 P4 P5 P6 P7
Thickness (mm) 170 200 200 230 150 200 200 400
Plaster (mm)
External | Internal
15 | 1020 | 1520 | 1515 | 10 20 | 15 20 | 1520 | 10 20 | 10
WWR (%)
Window to wall ratio
17 19.3 20.1 12.6 20 41.3 16.1 16.6
Glazing type* SC SR SC SC SC SR SR SR
*SC-Single clear
*SR-Single reflective

101. Discussion and Analysis
Monolithic concrete wall
Industrial
slag brick
Fly ash brick AAC blocks
Brick wall
with air
cavity
13.6
11.5
13.7
4.42
10.8
2.4
3.3
6.6
1.4
1.2
2.3
0.95
1.5
3 1
1.8
6.2
4.8
8.4
5.53
7.7
10.6
2.8
4.5
0
5
10
15
20
25
30
Project 1 Project 2 Project 8 Project 3 Project 4 Project 5 Project 6 Project 7
RETV results (W/m²)
Term wise RETV results for all projects
RETV Term III
RETV Term II
RETV Term I

102. •Location: Chennai.
•The longer sides of the project are facing E-W
orientation.
Case-Study in Chennai
•Climate type: Warm &
Humid climate
•No. of blocks: 3, Block A,B &C
•20 storeys
•Unit type: 2/3 BHK
apartments
•Number of units: 596

103. Construction details
Details
External Wall 170 mm monolithic
concrete
Glazing 6 mm thick single clear
glass
WWR ~17%
170 mm
monolithic
concrete wall;
U= 3.60 W/m2.K
U= 5.8
W/m2.K
SHGC = 0.8

104. RETV ~ 26, (high compared to cut-off of 15 W/m
2
as per ECBC-R);
•Excess heat gain from wall conduction due to East-West facing
orientation and walling made of monolithic concrete.
•Heat gain due to window transmittance is also high because of
inadequate shading
Case I: 170 mm concrete wall +
Single Clear Glazing + No Shading
of Windows
104Indo-Swiss Building Energy Efficiency Project (BEEP)
RETV (I
st
Term)
RETV (II
nd
Term)
RETV (III
rd
Term)
RETV
(TOTAL)
Case.1
-No shading
-Monolithic concrete
15.3 1.4 9.4 26.1

105. Case II: (Final design constructed)
Case I + Proper Shading of Windows
Annexure 7: Calculation of Effective SHGC
RETV (I
st
Term)
RETV (II
nd
Term)
RETV (III
rd
Term)
RETV
(TOTAL)
Case.II
-Box type
Shading
-Monolithic
concrete
15.3 1.4 6.2 22.9
RETV ~23 W/m
2
Shading helps in reducing heat gains from windows

106. Case III: Case II+ AAC block wall
(Proposed measure)
RETV ~ 11, significantly lower than 15 W/m
2
Reduced thermal conduction from walls
RETV (I
st
Term)
RETV (II
nd
Term)
RETV (III
rd
Term)
RETV
(TOTAL)
Case.III
-Box type
Shading
-AAC Blocks
3.3 1.4 6.2 10.9
200 mm AAC
U= 0.77 W/m².K

107. RETV (I
st
Term)
RETV (II
nd
Term)
RETV (III
rd
Term)
RETV
(TOTAL)
Key Envelope Parameters and it’s
impact on RETV
Case III: Case II+ AAC block wall (Proposed
measure)
Case II: (Final design constructed) Case I +
Proper Shading of Windows
Case I: 170 mm concrete wall + Single
Clear Glazing + No Shading of Windows
15.3 1.4 9.4 26.1
15.3 1.4 6.2 22.9
3.3 1.4 6.2 10.9

108. Case-Study of NABARD Project,
Mohali
•This project is a residential quarters (only
block II) build for the NABARD (National bank for
agriculture and rural development) staff at Mohali.
•The climate type is composite.
•No. of dwelling
units in Block II
(DU): 20 (all 2
BHK)
•Stilt + 5 storeys

109. Case I: 230 mm brick wall +
Normal WWR + Single Clear
Glazing + No Shading of WindowsRETV (I
st
Term)
Wall conduction
RETV (II
nd
Term)
Window
conduction
RETV (III
rd
Term)
Window
transmittance
RETV
(TOTAL)
Case.1
-Brick Wall
-No Shading
-Single clear
glazing
-WWR: ~14%
10.1 1.8 9.621.5
U-Value
2.0
W/m
2
.K
RETV ~ 22, (high compared to cut-off of 15 W/m
2
as per ECBC-R)
Heat conduction through wall is high and high
heat gains from windows with no shading
Front elevation of the block II

110. Case II: Case I + Proper Shading of
Windows
RETV ~19 W/m
2
Shading helps in reducing heat gains from
windows
Annexure 7: Calculation of Effective SHGC
U-Value
2.0
W/m
2
.K
RETV (I
st
Term)
Wall conduction
RETV (II
nd
Term)
Window
conduction
RETV (III
rd
Term)
Window
transmittance
RETV
(TOTAL)
Case.2 (Brick Wall,
Shading: Overhang
+ Side fin
WWR: ~14%
10.1 1.8 6.718.6

111. Case III: Case II+ Single reflective
glass
RETV ~16 W/m
2
Using single reflective glass instead of single
clear glass reduces heat gain due to window
transmittance
Annexure 7: Calculation of Effective SHGC
U-Value
2.0
W/m
2
.K
RETV (I
st
Term)
Wall conduction
RETV (II
nd
Term)
Window
conduction
RETV (III
rd
Term)
Window
transmittance
RETV
(TOTAL)
Case.3 (Brick Wall,
Shading: Overhang
+ Side fin+ Single
reflective glass
10.1 1.8 4.516.3

112. Case IV: (Final Design Constructed)
Brick cavity wall+ Shading+ Single
reflective glass
RETV ~13 W/m
2
Using Brick cavity wall with 40mm air gap
reduces the heat gained due to wall
conduction
Annexure 7: Calculation of Effective SHGC
U-Value
1.1
W/m
2
.K
RETV (I
st
Term)
Wall conduction
RETV (II
nd
Term)
Window
conduction
RETV (III
rd
Term)
Window
transmittance
RETV
(TOTAL)
Case.4 (Brick
Cavity, Shading:
Overhang + Side
fin+ Single
reflective glass
6.6 1.8 4.512.8
230 mm + 40 mm
cavity +115 mm brick

113. Case V: Extra measure: AAC block
wall + Shading of Windows+
Single reflective glass) RETV (I
st
Term)
RETV (II
nd
Term)
RETV (III
rd
Term)
RETV
(TOTAL)
Case.3
-AAC Block Wall
-Shading
-Single reflective
glass
4.7 1.8 4.510.9
RETV ~ 11 significantly lower than 15 W/m
2
Reduced thermal conduction from walls; use of
single reflective glass and shading helps in
reducing heat gains from windows
200 mm AAC
U-Value
0.7
W/m
2
.K

114. Key Envelope Parameters and it’s
impact on RETV
RETV (I
st
Term)
RETV (II
nd
Term)
RETV (III
rd
Term)
RETV
(TOTAL)
Case.3 (Brick Wall, Shading: Overhang +
Side fins, Single reflective glass-SR)
Case.2 (Brick Wall, Shading: Overhang +
Side fins, SC)
Case.1 (Brick Wall, No Shading, Single
clear glass-SC)
10.1 1.8 9.6 21.5
10.1 1.8 6.7 18.6
10.1 1.8 4.5 16.3
Case.4 Extra measure (AAC Block Wall,
Shading and SR glass)
4.7 1.8 4.5 10.9
Case.4 FINAL DESIGN (Brick cavity wall,
Shading: Overhang + Side fins, Single
reflective glass-SR)
6.6 1.8 4.5 12.8

115. Session4: StarLabelling
a)Low Energy Comfort Systems and BEE Star Labelling
b)Indian&InternationalBestPractices

116. What is green building?
A ‘green’ building is a building that, in its design, construction or operation, reduces or
eliminates negative impacts, and can create positive impacts, on our climate and natural
environment. Green buildings preserve precious natural resources and improve our
quality of life.
GREEN BUILDING
Efficient use
of energy,
water and
other
resources
Use of
renewable
energy,
such as
solar
energy
Pollution
and waste
reduction
measures,
and the
enabling of
re-use and
recycling
Good indoor
environmental
air quality
Use of
materials
that are
non-toxic,
ethical and
sustainable
Consideration
of the
environment
in design,
construction
and operation
Consideration
of the quality
of life of
occupants in
design,
construction
and operation
A design
that enables
adaptation
to a
changing
environment

117. INDIGENOUS AND LOW-EMBODIED MATERIALS
LOW CARBON EMISSION LEAST CARBON FOOTPRINT
POTENTIAL FOR RECYCLING & REUSE
MATERIALS WITH

118. GREEN BUILDING –BEST PRACTICES
Increased water
preservation efforts
1
Improved Environmental
product market
2
Fewer Wastewater
Treatment Plants
3
•Rain water harvesting
•Using building material, which requires less curing
or water after
•Use of native species in landscape
•Use of low VOC content material
•High SRI paints
•Fly ash bricks
•EPS Panel
•Use of water efficient fixtures
•Monitoring and optimization of overflow of water

119. GREEN BUILDING –BEST PRACTICES
Fewer Power Plants
& Power lines
4
Equitable access to
transportation infrastructure
5
Better comfort
and productivity
6
•Use of energy efficient appliances and systems
•Encourage use of public transport / encourage to
use vehicle with low emission
•Thermal comfort will lead to better productivity

120. BEE STAR LABELLING FOR RESIDENTIAL BUILDINGS

121. BEE STAR LABELLING FOR RESIDENTIAL BUILDINGS

122. BIM Technology
INTERNATIONAL BEST PRACTICES
•Asingle coherent system of
computer based
•3D models rather than separate
design drawings
•BIM incorporates people and
technology to streamline time
and cost, and improve efficiency
in builds including skyscrapers,
hospitals, office andresidential
buildings.
•BIM incorporates people and
technology to streamline time
and cost, and improve efficiency
in builds including skyscrapers,
hospitals, office andresidential
buildings.

123. BIM Technology
INTERNATIONAL BEST PRACTICES

124. •Mainstreaming passive strategies in buildings for thermal comfort can significantly reduce
cooling, ventilation and lighting requirementsinbuildings;
•Lesserdependencyon mechanicalcooling/ heatingapproacheswilldecreaseformationofsurface
ozone,hencebetterairquality.
•Greaterawarenessofthebenefitsofsustainablebuildingdesignwillspurgreaterdemandfromall
strata ofsociety
•Sensitivityin buildingpracticeswilltendto decreasedisparityin thermalcomfortofdifferent
economicclasses.
•Makeactivestrategiespassive,andpassivestrategiesactive.
•70%ofthebuildingsrequiredinIndiaby2030areyettobe built.Maintainingstatusquois
irrelevant,andthere isagreat opportunityforincorporatingpassivedesign strategies
successfullyacrossour builtenvironment.
LEARNINGS
Source:McKinsey
Thank you.