State Of The Art Office Building & Campus For Maharashtra Energy Development Agency(MEDA) At AUNDH, PUNE
Architectural Design Basis: 2 o The sole motive and mission of MEDA is to Promote Energy Conservation, hence this campus design should be a sincere effort to achieve manifestation of same. o Evolve a design which is Climate Responsive, Sustainable and can comply with the super ECBC norms, GRIHA 5-star and NZEB requirement without compromising on the aesthetics and functionality. o As Energy Conservation, Demonstration Of Energy Efficiency In The Building and campus is of the Prime Imperative of the design brief, Integrated Design Approach has been adopted by the project team.
Climate Analysis: Architectural Design Basis: o Integration of Solar Passive design strategies trim down the energy sources to meet thermal visual comfort for the occupants. 3 o Detailed climate analysis was conducted to comprehend the critical parameters so as to address those in the design approach. Radiation and sun path analysis was carried prior so as to develop the plan form and determine orientation of the office building. Average Temperature ( C) Maximum Temperature ( C) Minimum Temperature ( C) Relative Humidity (%) Direct Solar Radiation (W/ m²) Diffuse Solar Radiation (W/ m²) Average Wind Speed (km/ h) Average Cloud Cover (%) Average Daily Rainfall (mm)
Climate Analysis: 4 Stereographic Diagram Location: Pune, IND Sun Position: 145.6, 72.8 HSA: 145.6, VSA: 104.4 330 345 N 10 15 30 315 20 45 300 1st Jun 1st 285 May 1st Apr 270 30 40 50 60 70 80 60 1st Jul 1st Aug 75 1st Sep 90 1st Oct 1st Mar 255 1st Feb 1st Jan 240 18 17 16 15 14 13 12 11 10 9 8 1st 105 Nov 1st Dec 120 225 135 Time: 12:00 Date: 1st April Dotted lines: July-December. 210 195 180 165 150
Solar Passive Strategies : Site Level Site Zoning: 5 Dense Vegetation Buffer Zone Public Zone Office Building Landscape Buffer Zone VIP Zone Buffer Zone Staff Residential
Solar Passive Strategies : Site Level Shadow Analysis on Site scale : 6 Shadow Ranges December Shadow Ranges March Shadow Ranges June Solar Analysis for Winter Solstice, Equinox Day And Summer Solstice has been carried out for campus to validate the Solar access for all buildings.
Solar Passive Strategies : Building Scale 7 Venturi Effect for Pre cooling: Venturi Effect for Pre cooling: Cross Ventilation Pre cooled Winds Shaded Terrace & Buffer Zone Hot West Winds Precooled Winds W N S E Cross Ventilation Pre cooled Winds VIP Area Office Area Public Areas Parking Area Service Core
Solar Passive Strategies : Building Scale Radiation Analysis : Annual Insolation analysis has been performed to validate the incident radiation on different facades o By virtue of orientation and Building form the radiation incident on North façade are below 600 Wh/sq.m. annually. o By virtue of orientation and building Form the radiation incident on East façade are below 800 Wh/sq.m. annually.
Solar Passive Strategies : Building Scale Floor Plate Optimisation for Daylight Distribution o Building Floor Plate depth of each office is the most important factor in daylight distribution. o Floor Plate has been optimized for uniform daylight distribution as per NBC and ECBC standards. Cabins are getting diffused daylight from the covered courtyard and open offices are getting daylight from the North and South Facades. o Optimized Shading Devices eliminate the glare and add visual comfort to the space. Optimized Floor Plate for Daylight Distribution in Typical Office
Super ECBC Compliance : Envelope Heat Gain Analysis 10 PWD building conventional Specifications Wall: 230 mm th. Fly Ash Brick Wall Roof: 150mm RCC + 150 mm Brick Bat Coba Glass: 6mm Clear Float Glass ECBC 2017 WBP Specifications Wall: U Value=0.40 w/m2k Roof: U Value=0.33 w/m2k Glass: U Value= 3.0 w/m2k, SHGC: 0.27 Building peak load components Conventional PWD Building Specs ECBC 2017 Wall conduction 64.39 23.71 Roof conduction 3.93 1.26 Window glass+frm cond 23.64 17.34 Window glass solar 34.53 19.87 Light to space 13.18 11.41 Total 139.67 73.59
Super ECBC Compliance : Envelope Heat Gain Analysis 11 160 140 120 100 80 60 40 LIGHT TO SPACE WINDOW GLASS SOLAR WINDOW GLASS+FRM COND ROOF CONDUCTION WALL CONDUCTION 20 0 Conventional PWD Building Specs ECBC 2017
Super ECBC Compliance : Envelope Specifications finalisation 12
Solar Passive Strategies : Building Component Scale 13 Efficient Envelope : Fenestration : o o Double glassed UPVC window units for East, South & North Facades on External Walls U Value: 1.8 W/ m2ok o Low Effective SHGC: < 0.25 o o Single Glassed UPVC window units for All fenestrations on Atrium Side U Value: 5.0 W/ m2ok
Super ECBC Compliance : Envelope Specifications finalization 14 Building peak load components Conventional PWD building specs ECBC 2017 MEDA design case Wall conduction 64.39 23.71 34.72 Roof conduction 3.93 1.26 3.6 Window glass + frm cond 23.64 17.34 12.57 Window glass solar 34.53 19.87 11.39 Light to space 13.18 11.41 6.87 Total 139.67 73.59 69.15 Achieved 26% reduction in Cooling Load
Other Energy Conservation Measures 15 Lighting o. LED lighting with occupancy sensors and day light sensors o LPD < 0.5 W/sft o Efficient exterior lighting with astronomical clock control o Basement lighting With solar light tubes Air Conditioning and Ventilation o High Efficient VRF system for cabins and conference rooms. o Efficiency values of VRF system has been designed as per ECBC 2017 and ASHRAE 90.1-2010. Fresh Air and Heat Recovery from exhaust o o All air conditioned areas are being designed as per ASHRAE 62.1-2010 Fresh air requirement + 30% additional fresh air. Heat Recovery Wheel has been proposed to exhaust air & fresh Air.
Demostrative Energy Conservation Stategies 16 Radiant cooled Ceilings Radiant Ceiling Earth air cooling tunnel
Demostrative Energy Conservation Stategies Two Stage Evaporative Cooling 17 BIPV (Building Integrated Photo Voltaic Panels)
Financial Analysis ECBC End Uses BAU design STANDARD ECBC DESIGN Electricity Electricity Electricity Energy (kwh) (kwh) (kwh) Saving % A B C ((A-C)/A)*100 Heating NA NA NA - Cooling 379470 276355 270000 29% Interior Lighting 284800 233070 233070 18% Exterior Lighting - Equipment 164910 164910 164910 0% Fans 40490 31530 30600 24% Pumps NA NA NA - Heat Rejection NA NA NA - Heat Recovery NA NA NA - Hot Water NA NA NA - Renewable - system Total 869670 705862 698580 19.7% 18 Additional Investment of 0.44 Cr with 2.8 years payback
Financial Analysis ECBC + End Uses BAU Design Standard Design ECBC Plus Electricity (kwh) Electricity (kwh) Electricity Energy Saving % (kwh) A B C ((A-C)/A)*100 Heating NA NA NA NA Cooling 379470 276355 207900 45.2% Interior Lighting 284800 233070 189890 27.1% Exterior Lighting Equipment 164910 164910 164910 0 Fans 40490 31530 29530 27.1% Pumps NA NA NA NA Heat Rejection NA NA NA NA Heat Recovery NA NA NA NA Hot Water NA NA NA NA Renewable system Total 869670 705862 592530 31.9% 19 Additional Investment of 1.05 Cr with 4.1 years payback
Financial Analysis Super ECBC End Uses BAU design Standard Super ECBC Design Electricity (kwh) Electricity (kwh) Electricity (kwh) Energy Saving % 20 A B C ((A-C)/A)*100 Heating NA NA Cooling 379470 276355 142460 62.5% Interior Lighting 284800 233070 132940 53.3% Exterior Lighting Equipment 164910 164910 164910 0 Fans 40490 31530 27050 33.2% Pumps NA NA NA Heat Rejection NA NA NA Heat Recovery NA NA NA Hot Water NA NA NA Renewable system Total 869670 705862 467350 46.3% Additional Investment of 1.83 Cr with 5.6 years payback
Role of MEDA, ECBC Cell PWC and EU 21 MEDA being state designated agency for ECBC activity in Maharashtra aims for highest energy efficiency standards for their own building. PWC ECBC Cell encouraged project team to explore and implement best practices, technologies and ideas to enhance the building performance and to reach next level towards Net Zero Energy Building PWC as ECBC Cell and EU supported whole design process by adding their technical expertise. EU and PWC brought international experience regarding energy efficiency projects.
Architectural Visualisations: Twilight View 22