Energy Efficient Hospitals_TERI
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Transcript of Energy Efficient Hospitals_TERI
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Presentation Structure
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Hospitals in India
Estimated electricity consumption in Hospitals (includingCommunity Health Centers and Nursing Homes in India), 2008
= 769-1538 Million KWH
Estimated electricity cost = 4324-8748 (Rs. Million)
Few Facts
Facts taken from: Energy Efficiency in Hospitals: Best Practice Guide-Developed by International ResourcesGroup under USAID ECO-III Project in association with Bureau of Energy Efficiency (BEE)
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24 x 7 usage
Controlled internal climate Most important requirement
Lot of internal heat due to people and equipments
Continuous supply of power required - so standby necessary
Energy expenses for hospitals range between: 3-8% of total expenses:15-20% of the hospitals O&M cost
Energy saving = Money saving
Energy Usage Pattern in Hospitals
www.marieclaire.com
Facts taken from: Energy Efficiency in Hospitals: Best Practice Guide-Developed by International ResourcesGroup under USAID ECO-III Project in association with Bureau of Energy Efficiency (BEE)
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Electricity end users in Hospitals
HVAC: 30- 65%
Lighting: 30- 40% Water pumping: 10-12%
Others: 5-15%
Figures taken from: Energy Efficiency in Hospitals: Best Practice Guide-Developed by International ResourcesGroup under USAID ECO-III Project in association with Bureau of Energy Efficiency (BEE)
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Case Study 1
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Case Study: Fortis Hospital, Shalimarbagh, New Delhi
Description
500-bed facility
Built up area: 64,400 sqm Comprising of: Cardiology,
renal & gastro intestinal units
Building compliant with
ECBC Registered for TERI-GRIHA
First hospital in India to haveregistered for the building
rating system
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Base building Fortis hospital, Delhi
1. Building Envelope
Externalwall
230 mm brick work plasteredon both sides
U-value = 1.98 W/m2K
Cement plaster + 200 mm AAC blocks +cement plaster
U-value = 0.69 W/m2K
Roof 150 mm concrete roof slab +100 mm brick coba + roof tilefinish
U-value = 2.43 W/m2K
150 mm concrete roof slab + 65 mmvermiculite + 100 mm brick coba + roof tilefinish
U-value = 0.98 W/m2K
Glass Single clear 6mm glass
U-value = 5.7 W/m2K
SHGC = 0.85Light transmittance = 89%
Double glazed low emissivity glass
U-value = 2.8 W/m2K
SHGC = 0.25Light transmittance = 46%
Energy efficiency interventions
Base Case Present case Total % Reduction
EPI (kWh/ m2 per annum) 605 593 2
U-value = 3.3 W/m2K
SHGC= 0.25Light transmittance (min) = 27%
U-value = 0.409 W/m2K
U-value = 0.44 W/m2K
ECBC recommended
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Energy efficiency interventions
230 mm brick wall230 mm brick wall
plasterplaster
UwallUwall = 1.98 W/m2K= 1.98 W/m2K
Base building Fortis Hospital building
200 mm AAC blocks200 mm AAC blocks
plasterplaster
UwallUwall = 0.69 W/m2K= 0.69 W/m2K
Wall
Roof
UwallUwall = 2.43 W/m2K= 2.43 W/m2K
Roof tile finishRoof tile finish
100 mm brick100 mm brick cobacoba150 mm concrete roof slab150 mm concrete roof slab
UwallUwall = 0.98 W/m2K= 0.98 W/m2K
Roof tile finishRoof tile finish
100 mm brick100 mm brick cobacoba
150 mm concrete roof slab150 mm concrete roof slab
65 mm vermiculite65 mm vermiculite
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Base building Fortis hospital, Delhi
2. LightingLamps: T-12 CFL (14 W, 18 W, 28 W) and T-8
Energy efficiency interventions
Base Case Present case Total % Reduction
EPI (kWh/ m2 per annum) 605 476 21
LPD achieved is less than 10W/m2Energy efficient lamps and fixtures havebeen used
LPD = 20 W/m2
ElectronicBallast: Magnetic
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Base building Fortis hospital, Delhi
3. HVAC
Chiller efficiency = 1.15 KW/TRAir cooled chiller
Chiller efficiency = 0.61 KW/TRWater cooled screw chiller (asper ECBC)
Energy efficiency interventions
Base Case Present case Total % Reduction
EPI (kWh/ m2 per annum) 605 346 43
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Base building Fortis hospital, Delhi
4. Controls for HVAC system
None Variable frequency drive onchilled water pumps, air handlingunits
Energy efficiency interventions
Base Case Present case Total % Reduction
EPI (kWh/ m2 per annum) 605 312 48
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EPI (kWh/ % reduction
ase building 605
nvelope optimization 593 2
ighting optimization 476 21
fficient chiller 346 43ontrols for HVAC system 312 48
605 593
476
346312
2 2143 48
0
100
200
300
400
500
600
700
ECBC interventions
EPI(kW
h/sqmperan
num)
EPI (kWh/sqm per annum) 605 593 476 346 312
% reduction 2 21 43 48
Base
building
Envelope
optimization
Lighting
optimization
Efficient
chiller
Controls for
HVAC
Case Study: Fortis Hospital, Shalimarbagh, New Delhi
Base Case Final case Total % Reduction
EPI (kWh/ m2 per annum) 605 593 48
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Case study 2:
Energy efficiency recommendations for
Standard design for Community HealthCentre, HAREDA
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Case study: Standard design for Community Health Centre, HAREDA
Building design had twoparallel wings
Majority of thefunctional rooms werealong two facades
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Optimum orientation
Orient building axis at 10
degrees angle with North
N
Zoning recommendations
Relocate functional areasfrom E-W facades / provideinsulation in these walls / no
openings in these facades
Design interventions
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Critical VSA at morning time= 60degrees
Projection of column as perarchitects design - a good shading
device when integrated with boxwindow
Shading design
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Detail section of shading design
Shading design
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1. Planting deciduous trees in front ofthe critical facades to filter the directsolar radiations.
2. Provide pergola or any other type ofroof shading on these facades.3. Shift the ramp towards right to
protect the adjacent S & W-facade,
through self shading.Shade the South side by
pergola as presented here
Alternatives for Shading the S-Facade
Shading options
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Lighting scheme- Base case
Luminaire Type: Single batten fixture
Lamp Type: 1x 40W Fluorescent tube lamp
Ballast type: Magnetic ballast
Lumen output of lamp: 2450lm
TLD40W
Artificial lighting optimization
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38.744.2Case 1 + Insulation on Roof (EPS)3
Temperature (oC)DescriptionCases
28.430.0Case 4 + Two stage Evaporative Cooling, 15 ACH10
28.530.0Case 4 + Two stage Evaporative Cooling, 10 ACH9
28.630.1Case 4 + Two stage Evaporative Cooling, 5 ACH8
31.034.0Case 4 + Direct Evaporative Cooling, 15 ACH7
31.034.0Case 4 + Direct Evaporative Cooling, 10 ACH6
31.233.9Case 4 + Direct Evaporative Cooling, 5 ACH5
38.644.1Case 2 + Reflective Coating on Roof4
38.744.2Case 1 + Insulation on Roof (Mud Phuska)2
38.844.5Base Case + Reduced window size & modified shading1
38.844.5230 mm Brick wall with cement plaster on both sides, 115 mm RCC,
plastered and tiled, Single clear glass
Base
Case
Day AverageMax.
Thermal comfort analysis
Simulation conducted using TRNSYS (The Transient Energy System Simulation Tool)
Various thermal comfort strategies were analyzed
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THANK YOU
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