Presentation on theme: "GRIHA & Solar Passive Architecture/Renewables"— Presentation transcript:
1 GRIHA & Solar Passive Architecture/Renewables Ministry of New and Renewable Energy Government of IndiaGRIHA & Solar Passive Architecture/RenewablesR S Prasad, Consultant, ADaRSH
2 What is a Green Building? A green building is a building which provide comfortable living and working conditions to its occupants while minimizing its detrimental impact on the environment.
3 Difference between Energy Efficient and Green An Energy Efficient building will only conserve energy as compared to other buildingsA Green Building willconserve energy;conserve water;conserve the landscape;reduce waste generation;adopt recycling and reuse of materials; anduse low-energy materials
4 Green building design calls for: integrated and coordinated design approach ….in planning, design, construction and management
6 Green Rating for Integrated Habitat Assessment Tool to facilitate design, construction, operation of a green building ,and in turn ….measure “greenness” of a building in IndiaWhat gets measured gets managed
7 Highlights Set of 34 criteria 100 (+4 innovation points) point system with differential weightage on various criteriaChange the pie –flat top viewChange the fonts to arial77
8 Weightage based on our National Priorities GRIHA innovation points over and above 100 points
9 Key highlights of GRIHA Sets out guidelines for design, construction and operationCombination of qualitative and quantitative criteriaSets performances benchmarks for key resources like, energy and waterFacilitates integration of traditional knowledge on architecture with present day technologyIntegrates all relevant Indian codes and standards(e.g National building code 2005, Energy Conservation Building Code 2007, IS codes)Is in complete alignment with government policies and programs (e.g Environmental clearance by the MoEF)9
10 Key highlights of GRIHA Building typesCommercialResidentialInstitutional5 climatic zonesHot – DryWarm – HumidCompositeTemperateCold
11 Salient features30-40% reduction in operation cost with negligible impact on project cost.A simple inclusive single window process from Design to RatingInclusive process with high degree of hand holding from ADaRSHOnly rating system that exclusively covers ventilated, air conditioned and non-air conditioned buildings/campuses140 projects with about 7 million square metres registered with GRIHA
13 Designing a green building! By adopting the integrated design approach such that the client, architect, engineers, and consultants design the building in a coordinated manner with a common goal – sustainability.By optimizing site conditions (trees, water bodies, windflow, orientation, etc.) and retain them to cater to the local thermal / visual comfort requirements of the buildingBy adopting sound architectural practices and taking examples from India’s traditional architectureBy following India’s national codes and standardsBy designing precisely-sized energy systems and not basing them on broad thumb-rules
14 Designing a green building! (Continued…) By following regional development plans (such as the UDPFI guidelines, master plans) and local building by-lawsBy adopting locally available construction materials and giving impetus to local arts, crafts, architecture and artisansBy reducing the resource consumption of the building and its inhabitants so that the waste generating there-from is reducedBy adopting energy efficient technologies (EETs) and equipmentBy adopting renewable energy technology (RETs) applications to reduce the demand on conventional energy
15 GRIHA-Green Rating for Integrated Habitat Assessment GRIHA attempts to minimize a building’s resource consumption, waste generation, and overall ecological/ environmental impact by consistent with nationally acceptable limits / benchmarks.It does so using the five ‘R’ philosophy of sustainable development, namelyRefuse – to blindly adopt international trends, materials, technologies, products, etc. Specially in areas where local substitutes/equivalents are availableReduce – the dependence on high energy products, systems, processes, etc.Reuse – materials, products, traditional technologies, so as to reduce the costs incurred in designing buildings as well as in operating themRecycle – all possible wastes generated from the building site, during construction, operation and demolitionReinvent – engineering systems, designs, and practices such that India creates global examples that the world can follow rather than us following international examples
16 Why should you get your building rates? Some of the benefits of a green design to a building owner, user, and the society as a whole are as follows:Reduced energy consumption without sacrificing the comfort levels (lower operational costs)Reduced water consumptionReduced system sizes (HVAC, transformers, cabling, etc.) for optimal performance at local conditions.Reduced investment (Lifecycle costs)Reduced destruction of natural areas, habitats, and biodiversity, and reduced soil loss from erosion etc.Reduced air and water pollution (with direct health benefits)Limited waste generation due to recycling and reuseReduced pollution loadsIncreased user productivityEnhanced image and marketability
17 Passive Solar Architecture Is the design of buildings whose orientation, forms, shading, materials, fenestration(window/door openings) and site planning enable the structure to naturally store thermal energy from the sun and/or cool the structure by shielding it from the sun rays and causing on unassisted air flow.Mankind has been using passive solar majors since time immemorial. The traditional buildings in India bear testimony to it.Passive solar techniques are as varied as architecture itself and depend upon the climatic regions.
18 Can buildings adopt traditional design principles and yet appear contemporary?
25 Design to reduce conventional energy demand (Based on principles of solar passive design) Conventional ‘adopt international design’ PhenomenaMore buildings are being built out of glass these daysLack of sound design keeps the visual comfort low (high glare conditions, excess heat ingress, etc.)Most occupants keep their curtains closed in glass buildings and use artificial lighting all day long.Thereby adding to the overall energy consumptionGRIHA approachThe design is optimized to allow maximum natural light in, while eliminating glareSound shading strategies ensure no direct solar radiation is allowed into occupied spaces during summers (and vice versa in winters) Also,Appropriate planning that reflects climate responsivenessAdequate day lighting providedOver and under-design of lighting system is avoided
26 Climate-responsive design strategies As per the climatic classification of National Building Code-2005, though India has a large variety of climate types, it is predominantly a country with tropical climate. Approximately, 90% of the area has hot- dry, warm-humid, and composite climate. Therefore, climate- responsive buildings, in this context, are designed to avoid the heat gain but at the same time allow adequate daylight into the living space. Some of the passive design strategies adopted to optimize building design that controls heat gain and allows maximum natural light are as follows:Optimum orientation;Internal space arrangement (thermal buffer zone/buffer spaces);Allocation of building openings;Sizing of openings (limitation of window-wall-ratio and skylight-roof-ration);Appropriate shading design (façade shading and fenestration shading); andAdequate daylighting (optimum daylighted area and daylight factor)
27 Solar-passive building design addresses indoor thermal comfort as well as visual comfort Reduce energy demand of space-conditioningReduce energy demand of artificial lightingReduction in energy consumption and GHG emission
28 Solar Passive Related Criteria in GRIHA The criteria 13 of GRIHA ( i.e. optimize building design to reduce conventional energy demand) addresses integration of solar passive principles in building design. This is a mandatory criterion, which emphasizes on building orientation, use of shading devices, fenestration design, window to wall ratio and achieving day lighting in living spaces.Criterion 4 – Design to include existing site features.Criterion 5 – Reduce hard paving on-site and/or provide shaded hard-paved surfaces.
29 Integration of ECBC with GRIHA Criterion 14 of GRIHA (i.e. optimize energy performance of building within a specified comfort limits) requires mandatory compliance with ECBC for projects that fall in the category of ECBC implementation.
30 Renewable EnergyThe criteria 18 of GRIHA (i.e. renewable energy utilization) makes it mandatory to meet 1% of project internal lighting and air conditioning connected load (or equivalent) by renewable energy.The Criteria 6 of GRIHA (i.e. enhance outdoor lighting system efficiency and use renewable energy system for meeting outdoor lighting requirement) promotes use of renewable forms of energy to reduce the use of conventional/fossil fuel based energy resources.
31 For conserving energy – in a cost-effective manner Cheapest SolutionMost Expensive SolutionPassive design of buildingUse of Efficient SystemsUse of Renewable Energy
36 Impact of Energy Efficiency measures on costs Built up area is 4240 sqm of which 1912 sqm is air conditionedKey energy efficiency features that added to cost (35 lacs)High performance glazing (Incremental cost of Rs 12.5 lacs)Roof insulation(Incremental cost of 7 lacs)Efficient lighting with controls(incremental cost of 9 lacs)High efficiency chillers/pumps/fans (about 34 TR which is 30% of total tonnage was saved, hence there was a decrease in cost by about 4 lacs)Earth air tunnel (11 lacs)Annual energy savings : 18.5 lacs
37 Optimization of building material & selection Initial energy consumption: 240 kWh/m2 yrBuilding envelopeBrick wallRCC roof without insulationSingle clear glass for windows240 kWh/m2 per annumCavity brick wall with insulationRoof insulation with fiber glassShading on roofDouble glass for windows208 kWh/m2 per annum13% energy savings
38 Optimization of Lighting Design Lighting optimizationEfficient fixturesEfficient fixtures & lampsEfficient layoutDaylight integration208 kWh/m2 per annumAchievementLPD=1.3W/ft2Illumination levels as per standards:Laboratory: 400 luxCorridors: 200 luxWork plane (faculty room): 300 lux168 kWh/m2 per annum19% energy savings
39 Optimisation of HVAC system Air-cooled chiller168 kWh/m2 per annumWater-cooled chiller CoP=4.88 (complying with minimum efficiency requirements of the Energy Conservation Building Code133 kWh/m2 per annum21% energy savings
40 Optimisation of HVAC design HVAC systemNo controls used in HVAC system133 kWh/m2 per annumControls used in HVAC systemVariable speed drives for chilled water pumpsEfficient load managementEarth air tunnel for fresh air treatment98 kWh/m2 per annum26% energy savings
41 Annual Energy Savings 61% savings Initial energy performance EPI = 240 kWh/m2 per annumEnvelope optimisationEPI = 208 kWh/m2 per annumLighting optimisation61% savingsEPI = 168 kWh/m2 per annumEfficient chillerEPI = 133 kWh/m2 per annumControls for HVAC systemFinal energy performanceEPI = 98 kWh/m2 per annum
43 ADaRSH (Association for Development and Research of Sustainable Habitats ADaRSH is an independent society, registered under the Societies Act, 1860 as a platform for interaction on all relevant issues pertaining to sustainable habitats in the Indian context. It was founded jointly by MNRE (Ministry of New and Renewable Energy, Government of India) and TERI (The Energy & Resources Institute, New Delhi) along with some of the experts in the fields related to sustainability of built-environment from across the country. ADaRSH promotes and manages GRIHA – The National Rating System (Green Rating for Integrated Habitat Assessment) as a design and evaluation tool for green buildings and habitats, and administers the rating.
44 GRIHA Rating- Robust process Online registrationSubmission of project detailsPayment of registration fee (private projects)Orientation workshopSubmission of compliance form (govt & private)Submission of undertaking (govt)Part payment of registration fee (govt projects)Compliance on siteDue diligence site visits (minimum 3)Last visit to be conducted after commissioning of systems on siteAssessment of compliance (online site visit reports)DocumentationSubmission by clients1st review-ADaRSHComments on completeness, compliance (ref. initial commitment)Resubmit1st EvaluationSubmission by ADaRSH2nd review -third party subject expertsComments on correctness of complianceResubmit clarifications
45 …GRIHA Rating Final Rating Performance audit Provisional Rating 2nd EvaluationSubmission on clarifications soughtFinal evaluation- third party subject expertsCompilation of score by ADaRSHSubmission of final score to NACNAC approvalADaRSH to propose the final score and provisional star rating to NAC (by circulation)NAC to announce award or provisional ratingRemaining payment of registration fee (govt projects)Provisional RatingRelease of MNRE incentivesPerformance auditConducted after 1 year of project operationBEE accredited auditor to submit reportReview of report and recommendation of final rating by ADaRSH to NACFinal Rating
46 Registration of projects- current status GRIHA95 government buildings (MNRE has paid registration fee for 43 projects)38 projectsSVA GRIHA7 projects (public and private)TOTAL: 140 projectsApproximately 7 million sq m registeredMNRE has encouraged registration of government projects by committing to pay registration fee for the first 200 Government of India and PSU buildings.Intensive workshops and minimum 3 due diligence site visits are conducted for each registered project
47 Current incentives from Ministry of New and Renewable Energy, Government of India a) Government projectsRegistration fee for 200 building projects waveredb)Private projects- Project Proponent / Owner (upto 2012)90% Registration cum Certification fee reimbursed3 Star for buildings < 5000 sq.m.4 Star for buildings > 5000 sq.m.c) Project Team (Architects / HVAC Designers)- upto 2012Rs.2.5 lakhs 3 Star for buildings < 5000 sq.m.Rs. 5.0 lakhs 4 Star for buildings > 5000 sq.m.d)Capital Subsidy on Photovoltaic panelsAs per MNRE scheme for urban arease) Municipal Corporations / Urban local bodiesRs.50 lakhs (Corporations)Rs.25 laksh (other ULBs)
48 Mechanisms for implementation RegulatoryFast track EIA clearance for GRIHA pre-certified projectsMinimum 3 Star for all Central Government and Public Sector Undertaking buildings mandatoryMinimum 3 Star for all CPWD buildings mandatoryMinimum 3 Star for all buildings in Delhi as per the notification of the Delhi CabinetMinimum 1 Star for all buildings in Pimpri Chinchwad Municipal Corporation (PCMC)Kerala PWD has announced adoption of GRIHAFinancial0.25% interest rebate on home loans from SBIIncentives from MNRE (registration fee waiver & cash awards)Incentives from Municipalities (property tax rebate & discount on premium for developers)
49 Fast track clearance for GRIHA pre-certified projects
50 PCMC endorses GRIHA Rebate on premium for developers Property tax rebate for occupants/ owners of GRIHA compliant homes
51 Extension of GRIHA Green Guidelines for Large Developments SVA GRIHA-(Simple Versatile Affordable) GRIHA<2,500m2GRIHA preferred by educational campuses( 18 projects)
53 BackgroundPreparation of SVA GRIHA for projects <2500 sq m recommended by NAC in January 2011Large demand from PCMC, which has endorsed GRIHARegistration fee for smaller projects becomes less (since financial incentives and registration fee waiver by MNRE not applicable)Avoids the need to appoint an energy consultant for smaller projectsSubsequently, SVAGRIHA designed to cater to projects with built-up area less than 2500 sq.m.53
54 The Process Registration of the project Access to the web-based tool given to the projectSubmission of completed tool along with necessary documentation to ADaRSHFeedback to Project TeamSite Visit and due diligence check post constructionEvaluation by a GRIHA EvaluatorAward of Rating by ADaRSHNote: The site audit to check compliance will be done once the projects is complete and all equipment to be verified are installed54
55 Minimum points to be achieved The StructureSVAGRIHA has 14 criterion which are divided into 5 themes and 50 pointsMandatory to achieve minimum points in each categorySub-GroupMaximum pointsMinimum points to be achievedLandscape63Energy2111Water & wasteMaterials84Others1Points achievedSVAGRIHA Rating25-3031-3536-4041-4545-5055
56 Criterion number Criterion name Points 1Reduce UHIE and maintain native vegetation cover on site62Passive architectural design and systems43Good fenestration design for reducing direct heat gain and glare while maximizing daylight penetrationEfficient artificial lighting system5Thermal efficiency of building envelopeUse of energy efficient appliances7Use of renewable energy on site8Reduction in building and landscape water demand9Rainwater harvesting10Generate resource from waste11Reduce embodied energy of building12Use of low-energy materials in interiors13Adoption of green Lifestyle14InnovationTotal5056
57 Impact- mitigation of climate change In 2030 emissions from commercial sector:BAU: 1370 Mt CO2-eGRIHA: 840 Mt CO2-e38% emission reductions can be achieved by GRIHA