assessing ‘green’

in

shweta manchanda6.13.2013

in affordable housing

‘a home for all in india within 2022’

a house, apartment, or other shelter that is the usual residence of a person, family, or household

there are 400 million ‘green’ homes in India

GREENGREEN

modern buildings are designed to achieve an optimum level of indoor quality that can provide total comfort for the occupant, in a healthy environment as perceived by his sensory capabilities...

reference: santamouris and asimakapolous, 1996

Sector-Wise Electricity Consumption in India (2007-2008) Source: CEA 2009

Electricity Consumption per Household5 (2000-2020) LBNL India Energy Outlook 2009

operablewindows

PASSIVE � ACTIVE

COMFORT DEFINITION

• building design strategies• building design strategies• urban design interventions

basis of recommendations

COMFORT DEFINITION

NATIONAL BUILDING CODE

GRIHA-ECBC

adaptive comfort

SATISFACTIONENERGY WELLBEINGENERGY WELLBEING

?

SATISFACTIONENERGY SATISFACTIONENERGY //

climate chamber controlled HVAC buildings buildings

outdoorspaces

climate chamber controlled HVAC buildings

naturally ventilatedbuildings

outdoorspaces

source: after Nikolopolou, 2000

- a d a p t i v e o p p o r t u n i t y c o n t i n u u m +- a d a p t i v e o p p o r t u n i t y c o n t i n u u m +

source: de Dear et al., 1997

perceived controlaspirations

Fanger’s scale

PMV

Predicted Mean Vote

PPD = PMV -3, -2 or +2, +3

PPD<10% (good) = -0.5 < PMV < +0.5

Percentage of People Dissatisfied

source: de Dear et al., 1997

Baker’s curves: response in relation to adaptive opportunity

operative temperature* for 1.2 met at 50% RH and air speeds<0.15m/s

winter (1.05 clo) deg. C 22.5 (20.5-24.5)summer (0.65 clo) deg. C 23.5 (21.5-25.5)

relative humidity% 30-60

air speedm/s 0.1-0.2 (max.0.8)

international standards

AIR-CONDITIONED BUILDINGS

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)

m/s 0.1-0.2 (max.0.8)AIR-CONDITIONED BUILDINGS

NATURALLY VENTILATED BUILDINGS

S1

Slide 25

S1 why globe? writeShweta, 09-06-2014

source: Manchanda, 2010

source: Manchanda, 2010

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctober

AH

20

25

30

Psychrometric ChartLocation: New Delhi, INDData Points: 1st March to 1st JuneWeekday Times: 00:00-24:00 HrsWeekend Times: 00:00-24:00 HrsBarometric Pressure: 101.36 kPa© W eather T ool

OctoberNovemberDecember

DBT(°C) 5 10 15 20 25 30 35 40 45 50

5

10

15

Comfort

JanuaryFebruaryMarchAprilMayJuneJulyAugust

AH

20

25

30

Psychrometric ChartLocation: New Delhi, INDData Points: 1st June to 1st SeptemberWeekday Times: 00:00-24:00 HrsWeekend Times: 00:00-24:00 HrsBarometric Pressure: 101.36 kPa© W eather T ool

AugustSeptemberOctoberNovemberDecember

DBT(°C) 5 10 15 20 25 30 35 40 45 50

5

10

15

Comfort

JanuaryFebruaryMarchAprilMayJuneJulyAugust

AH

20

25

30

Psychrometric ChartLocation: New Delhi, INDData Points: 1st September to 1st DecemberWeekday Times: 00:00-24:00 HrsWeekend Times: 00:00-24:00 HrsBarometric Pressure: 101.36 kPa© W eather T ool

AugustSeptemberOctoberNovemberDecember

DBT(°C) 5 10 15 20 25 30 35 40 45 50

5

10

15

Comfort

JanuaryFebruaryMarchAprilMayJuneJulyAugust

AH

20

25

30

Psychrometric ChartLocation: New Delhi, INDData Points: 1st December to 1st MarchWeekday Times: 00:00-24:00 HrsWeekend Times: 00:00-24:00 HrsBarometric Pressure: 101.36 kPa© W eather T ool

AugustSeptemberOctoberNovemberDecember

DBT(°C) 5 10 15 20 25 30 35 40 45 50

5

10

15

Comfort

green building design

1.orientation and shading

2. insulation & thermal mass

3. ventilation & daylighting

4. hybrid heating & cooling

WAY FORWARD

• cost effective/ simple strategies• comfort standards/behavioral and

attitudinal change• dynamic modelling/integrated systems