Energy Efficient Hospitals_TERI

8/12/2019 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

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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


Roof 150 mm concrete roof slab +100 mm brick coba + roof tilefinish


150 mm concrete roof slab + 65 mmvermiculite + 100 mm brick coba + roof tilefinish


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%



ECBC recommended


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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


Wall

Roof


Roof tile finishRoof tile finish

100 mm brick100 mm brick cobacoba150 mm concrete roof slab150 mm concrete roof slab


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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2. LightingLamps: T-12 CFL (14 W, 18 W, 28 W) and T-8




LPD achieved is less than 10W/m2Energy efficient lamps and fixtures havebeen used

LPD = 20 W/m2

ElectronicBallast: Magnetic


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3. HVAC

Chiller efficiency = 1.15 KW/TRAir cooled chiller

Chiller efficiency = 0.61 KW/TRWater cooled screw chiller (asper ECBC)





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4. Controls for HVAC system

None Variable frequency drive onchilled water pumps, air handlingunits





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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



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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


19/25Designed Section Recommended Section

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



31.034.0Case 4 + Direct Evaporative Cooling, 15 ACH7



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

For further queries please write to:

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Energy Efficient Hospitals_TERI

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