 Good afternoon sir. My question is, Vastushastra is followed in India only or all around the world it is designed based upon Vastushastra. Vastushastra is actually an ancient Indian science of construction and that is the reason we took the scientific principles of Vastushastra into consideration and not just the beliefs because whatever principles we've adapted in our house we've sort of followed it up scientifically. So this what we're proposing can be used worldwide but originally Vastushastra is an Indian science of construction. Thank you. Like I mentioned earlier it's also based on the environmental criteria of the place that you're looking at. So if you're looking at Vastushastra in a particular context it has to be judged based on the place and the geography and the climatic conditions of that place. Like she said there's a scientific basis and not just a spiritual idea. And next question is, as day by day the rate of electricity is increasing. So the best option for the alternative method is we are going for a solar system but in the regions of Jammu Kashmir where the solar power is not available in those regions what is the alternative method for the renewable energy? Actually most of the country has very good solar resources. So even if you look at Jammu Kashmir most many areas of that if you look at the solar insulation it's not bad. But we can look at solar, you can look at biomass, you can look at micro hydro where it is available. So in different areas there are different renewables and you can have a mix of them. But solar is relatively abundant all over the country. Good afternoon sir. Yeah I mean my heartiest congratulations to the team Shunia for being selected. I want to focus on the how that the water and the sewage and plumbing system be recycled. I mean the huge amount of water is being used by per capita around 140 to 150 liters. I mean would it all go to the main sewage or drainage line to the municipality or will you recycle all that? I mean that's a question. Thank you. So basically in case of water for all the water requirements that we have certain things of certain things are classified as black water certain things are classified as gray water. Certain sinks will hand wash and bathroom sinks will be used as black water which will not be used which will only be treated and sent back for storage or into the ground. But all gray water that will be generated in the house we do plan to reuse after treatment for irrigation because the rule state that gray water only has to be used for irrigation that there are methods of using it. I mean there are technologies where you can use gray water for other purposes but we're right now focusing on irrigation because we're supposed to focus on that and we have enough land to irrigate and we're also planning to have a roof curtain so we'll have enough gray water to satisfy all our needs. And we're also planning to include rainwater harvesting. Basically since we will get enough rain in Mumbai close to Mumbai we're planning to have the modular house functional and even in Versailles where there is enough rainwater to be able to exploit that technology. 1-1-8-2. Good afternoon sir. My question is that in the high-rise building we know that there is a high wind pressure at the top so sir how we can divert this pressure for the bottom for making it green building? I'm not sure exactly what is the whether we are looking at see there are two things two parts of your question. One is that existing patterns of pressure and winds if we can utilize which we can utilize and there are different kinds of designs there are also ducted turbines people are talking of and low wind speed turbines the second part is whether we can channelize and actually design things so that you can have you can modify the wind use pattern locally and that's an interesting concept there are some papers on it but I don't think commercially that has been sort of thought of so I don't have an answer to that part of the question but yes existing wind profiles you can definitely tap. One more question is sir is there any way to use both wind and solar energy together? Yes wind and solar is hybridized basically what we are looking at is the integration is through the battery that we are talking of so the power basically what you have is currently for instance if you see you have these 10 kilowatt modules with a certain portion of wind and certain portion of PV and so the whole idea is that you get different shares of electricity from wind and PV depending on the resource availability so that that's possible to hybridize. Hello sir my question is to Swathi ma'am to what extent adobe construction can be used in India and what is it feasible in Indian atmosphere? You are talking about adobe construction yeah it is feasible only issues major issues that we would have in our climate would be the water element so your adobe construction has to be taking care of that so if you're looking at a particular geography then you have to understand the climate and we also talked about lorry baker's construction and rain and all those aspects so if you can protect your walls and then go ahead with an adobe construction then it would help also the second aspect is the stabilization which is done for earth construction so if you go for a correct kind of a stabilization it would help you to overcome your moisture entry issues so I guess you could do that of course there is a limitation on height and spans and things like that so those aspects have to be looked into which are very building specific again. In the Indian climate condition air pollution that is dust is more so how to protect solar panels or cells from dust suggests preventive measures. This is actually a very important question and the impact of dust we are studying on the panels of course cleaning and self cleaning panels are what people are thinking of so you have if you have a technology where the panel can sort of self clean and there is some work going on in this area but this is an as an important area to look at and I think it's an area where there'll be much more developments and research in future. One three double zero. In context of like energy saving ideas we use roof farming or roof gardening so my question is that what is the feasibility of using roof gardening in small cities and what are the issues related to roof materials in terms of like concrete roof will work or any some other special materials. I'll answer that question it's it's the issue is a very specific question related to what materials we should use for roof. Yeah professor Shankar with that. Well having farming in urban areas is one of the one of the major aspects of sustainability one sustainability. Cities have always been looked at as places which consume and not create food. The future is that cities should also start producing food. So terrace gardens multiple level gardens are being considered mostly for micro use I mean at the place where it's going to be produced. The roof could be anything it could be a conventional concrete roof with a very reliable waterproofing system. The issue is apart from waterproofing is the load because soil is a very heavy component especially wet soil. So what people are looking at is soil less farming. So you have various kinds of soil less farming which can be done. You have vermiculite which is a lighter composite component which can be used instead of soil of in Japan Israel etc they're already trying basically what green elements and what plants need to grow is minerals from the soil and sunlight. So there are technologies where you're trying to actually create compounds which already have those minerals so that the soil can be reduced etc so there that's an independent area of research like professor Banerjee said there'll be lots of there's a lot of scope for new innovation in this area. So it is a developing field. 1076. My question is can we have some sort of savings for the existing buildings like what sort of labor we can offer turning an existing building into a building and what are going to be done in the future? I think this question was asked even in the earlier session the concepts are similar the scope that you have for design is much less. So you're constrained by looking at taking the existing and then modifying. So you looked at when you talk about passive concepts incorporating that passive concepts and retrofitting it. If you're talking of renewables we are looking at existing building we would like to see do you have the roof space available for the renewables and then you put the renewables and connect it with the same system. So if you are doing a green field you have a whole host of choices if you are doing an existing the choices get narrowed down but you can then work with the similar kind of concepts and try to do it and there are studies for instance if you look at some of these sites where they talk of the retrofits which have been done you can actually retrofit where the energy consumption goes down to only about 10% of the existing ones. So depending on the existing building you can look at specifics but you can really go down to almost near zero for almost any existing building. If I'm not mistaken the Empire State Building has also been retrofitted so maybe you should go on to that website and have a look at that 1047. How is the ventilation system between buildings? Is it different in green building than other buildings? The question as I heard it was how is the ventilation system and is it different in green buildings as compared to other buildings so you know when you talk of green buildings you're trying to have the as you saw there are many different passive concepts where you try to see even without the the present system the way we've gone we've modernized this we try to shut out all the natural elements and then put energy to then air condition and provide the comfort condition. In the case of green buildings you try to ensure that you have the required ventilation and the required depending on looking at what is available in nature using that to the so in that in that extent it is different and so and you can try and do that so that you really minimize the requirement of active energy and then you put renewables. Yeah triple one six. Good morning sir my question is actually I have two questions first of which has been partly answered already by you which is if I want to utilize solar energy electrical energy in my house then how do I change direction of the solar panel because normally it is said that in summer in our country the surya is uttara that is towards north and in winter it is towards south that is in dakshinayan so to maximize the acceptance of solar energy the panel direction should be changed this has been partly answered by the sunya team by they have said that they will change the direction of the panel as the direction of the sun changes and his question was if the houses are at the roadside there is a lot of smoke and smoke particles and dust then how do we take care of the solar panel so you actually have told that some work is already going on in this direction my second question is to the sunya team that if they are saying that their house will be a fully functional house does it mean enabling usage of all home appliances if yes then what is the wattage of those home appliances which we can use yeah so regarding the question that was directed towards us we have when we say that the house is fully functional it is genuinely fully functional so it will have ac washing machine television laptop lights dishwasher clothes dryer these things they are made mandatory by the competition so all of those appliances will be there regarding the wattage so this is how I answer it we have a 5 kilowatt peak system and given the climatic conditions it produces around 20 kilowatt hour per day on average for the month of June July so the if you take it some total of all of the appliances their ratings and if you multiply that with the typical usage so that comes out around to around 14 15 kilowatt hour per day so we have a net zero energy house so energy positive house so in that sense all of these appliances can be utilized but for the competition we'll not be using all of them all of the time so we'll be using them selectively however the house that we have designed has the capability to support all of these appliances through a combination of solar PV panels and the grid just like to add that you know the team has actually taken for each appliance see we have in this case requirement for the competition so you have a television you'll have a dishwasher and you have a washing machine and there are cycles for that so for each appliance we have taken the best efficient rating and the peak rating and a usage pattern and then built up the load profile for the house and then done that calculation for Mumbai and Versailles condition and that shows us that we are going to be able to be about five units positive 5 kilowatt hour will be actually supplying to the grid one of the basis by which we will be judged is how much electricity we will actually be able to generate during the one week that our house is connected to the Versailles grid so this is how so we are actually the challenges for us is that we are doing the simulation but we actually have to build it and we have to see the results in the in the field we were asked what is the concept behind the handicap bathroom actually the handicap bathroom is a requirement the competition states that we need a handicap bathroom in the house so it I mean it really doesn't have much of a concept it's more of a requirement thank you there was a question on will ozone depletion cause any harm to green buildings and ozone depletion is a global problem it's not at a local issue of course ozone depletion if overall it can cause harm to the the globe but that problem with the Montreal protocol has more or less been tackled so that's one of the global problems which seems to have been we've seen hopefully seen the end of it why is the concept of thermal mass not being given not given preference to decrease the usage of HVAC systems well things are changing you know people are we are looking at using these passive concepts and reducing this so this mix there's a dynamics and we have to as things change is going to come in more so active HVAC systems will reduce one zero three two my question is to professor Ranjan sir in solar panel the efficiency of a battery and battery is just only two years so it will affect the whole cost of the solar panel I mean it will affect the overall cost of the solar panel during his life so how to overcome this we don't have such technology of a battery even the lead and battery we don't have such to store the battery more than five years it just efficiency fire so how to overcome this thing that's an important question and I wish I had the answer to it the lead acid batteries are still you know on a life cycle basis they're probably still the most cost effective storage option two things one can do one is one can think in terms of demand side management and load control reduce the need for storage and we are looking at now nickel cadmium lithium ion new battery technologies and concepts coming in and hopefully cost will come down but this is the trickiest part of course if you're doing this so we can use the grid as a means of storage so many of these systems that we are talking of PV are grid interactive systems but the issue of battery life and battery cost is an important issue and I think in the future we are going to see a lot of technology developments in this area there's a question can we be a part of this project the answer that we have is that the primary responsibility of the project is with this team however we welcome people to be part giving us ideas or be a part of some of these things and we will have to work out the modalities how that can be done yeah so generating awareness is one definitely one of the things that you can do once we have the house construction and the house being built then also I think that is when people can come in if you have some specific idea which you think can be integrated we can if that idea makes sense from our building we can use it and the credit for that particular idea and but overall right now we are well into the building and it will be difficult for us to integrate new people fully into projects so yeah another thing that we've been thinking of doing is having college coordinators from different colleges to essentially do the same thing that we are doing for IIT and AOA so that is we still need to figure out a few details before we can actually make a commitment of that sort but till that happens yes you can be a part of the project in the sense that you do whatever you feel that you have learned from this in your own college on your own behalf and if you want to let us know then we'll be very happy to receive any sort of feedback this project is not just about the house that we're building that's what is the message that we want to convey it's a lot bigger it's about tackling the energy problem and the demand housing demand problem in India and yes you can contribute to that in whatever way you see fit so the institute if you have a question please go ahead good afternoon sir well sir as we are talking in the context of saving energy can we also use the wireless transmission of electricity implemented in a household as being used practically by the students of MIT as electricity yes sure we can if it's it depends on how that technology plays out and you could have if it is cost effective and one can look at how this distribution system compares in a building typically the local distribution losses don't account for much so while we could do that and there will be situations where wireless transmission may be possible the issue will be how that technology looks in terms of the capital and the operating costs but the simple answer to your question is yes it can the question is what all vernacular techniques have been built today something of that kind so I went through the lecture my lecture went through some examples and you've seen several examples where a lot of these have been implemented I do not know if the architects intended it that way but that's my perspective towards it and there are lots of buildings which you if you look around you'll find a lot of buildings which do implement these techniques vernacular as well as contemporary there's a question which says is it possible to build a completely net zero energy house well there are many examples of net zero houses which are there with details okay we can so yes it is possible 1192 hello sir sir my question is what is carbon footprint that's a simple question to answer carbon footprint is essentially if you look at any activity or any individual you can see suppose I want to calculate what is my carbon footprint I will see let's say I'll take whatever I have done in the last year how many times I've traveled by aircraft take the kilometers see how much energy is used in the aircraft and look at the carbon content of that fuel and then calculate then add it all up and I get total amount of tons of CO2 that I that I that is ascribed to my activity per year and then I can compare it with a global average and an Indian average so it's basically the total amount of CO2 that is emitted as a result of your activity and typically this will be done over a annual period 1071 my question is supposing every building in the country installs solar photovoltaics which has fluctuating inputs and follows the grid buyback policy I presume it may cause grid instability which is a serious matter and you know the we have to see how to address this issue and there are again there are several studies where people are looking at grid penetration there are there are possibilities in terms of the stability issue which you're talking of there's also an issue in terms of how do you balance the supply and demand for instance even Tamil Nadu this kind of effect has been seen for wind where you have a large amount of wind penetration and the wind is fluctuated so then the rest of the grid has to be planned for so when you talk in terms of large the whole concept would change because then you would have you have to have different buildings and each building has each building has a certain amount of generation you would also have to have quick other quick backup power which would come in when the solar is not there so this is something that we can use by looking at simulation and and see the effect but there are studies being done on local grid stability issues on this balancing issues but this is an it is a problem and it is something that one has to think of and plan for 1164 I want to ask a simple question we have been talking about green building right since morning but in our country in big cities we are building such large buildings covered with glass all over if you see them all buildings and also is it not an antithesis of the concept of green building yes we as I said you know there is always a dynamics between the whole idea is that we look at different concepts of buildings and there are you know there is nothing that mandates that buildings have to be of a particular type today so you have a whole spectrum of buildings and the whole spectrum of energy use and it is important that we try and integrate the concept of green buildings into our thinking both in terms of architecture and engineering and that is the whole motivation of this project that we are trying to do to bring in these concepts more into the mainstream I'd like to add to that it's not like a glass facades are bad glass buildings are bad glass has its use and its application that can be used positively and particular today particularly today with the invention of smart glass and double and triple glazing systems we have proven examples of buildings which have gone up and done a good job in terms of green architecture there's integration of ventilation systems cutting out of light sort of cutting out of heat while bringing in light all these examples you can see in the glass that is available today and the way the whole thing is engineered so it's not like glass is bad it's just that it's a situation specific thing and you need to make sure that it works that way green building point of view what is the contribution positive or negative of covering the building with glass all over obviously you can't use glass all over I think we can just say that we can't use glass all over you can't have a glass box we've I mean everyone has been talking about orientation and you know the context and all these things so obviously you can't use glass all over also what sort of glass is it so glass can't be used all over one last question one double zero three I have a question that can you explain me about the earthquake resistance in green buildings and is there any possible to resist the disaster I think you know these things are the issue of designing a building with conventional technology and the issue of designing buildings green buildings I can have green buildings which are designed to be equally earthquake resistant as conventional buildings I can have both which have not equally so it's it's not it's not necessarily saying that green buildings is any better or worse vis-a-vis earthquake resistance so you will have to if you're depending on the zone in which you are you are choosing the materials you can look at an analysis for earthquake resistance we have not talked anything about it in our workshop today and so it's not prima facie that a particular green building will be better or worse is not something which I can we can make an explicit comment and it's very context specific and yeah okay so we are we are going to show you a small five-minute video so about the Arsola Decathlon before we do that just like to thank all of you for sparing time on a saturday morning for being with us and this whole you know green buildings really have the potential to transform both the energy sector and the housing sector for India and this is not going to happen automatically this will need technology this will need development this will need design so we would really welcome your engagement with us whether it is in the form of ideas whether it is in the form of even follow-up courses if people are interested we can have this was more an awareness kind of course and we've been delighted with the response so far so we look forward to interacting with you in the future so please look at the video and thank you for your patience using solar energy as the only energy source IIT Bombay and Rajna Sansad's Academy of Architecture joined hands to form Team Suneer we are proud to be the first Indian team to ever participate in solar decathlon Europe 2014 in Versailles India home to 1.2 billion people is a culturally and geographically diverse nation the past two decades have witnessed rapid unprecedented development in industry technology and infrastructure the number of urban middle-class houses today stands at 32 million it is projected to be 147 million by 2030 a nearly 300 percent increase such a rapid increase in the housing sector will lead to a lot of pressure on the energy infrastructure so it is essential that India find a sustainable cost effective and energy efficient house for the Indian middle class team Suneer is trying to create a sustainable and affordable way to meet the growing energy and housing demand through a successful demonstration of our concept we aim to change the perception of the building industry policy makers and the general population towards sustainable housing our house is named H naught a 70 square meter house designed to accommodate up to six people it is a quintessential Indian home optimized for a typical urban Indian family unit of a couple two children and the grandparents H naught has a bedroom two bathrooms including a handicapped friendly one a kitchen and a wide spacious living room the house is a steel framed structure with walls made from prefabricated insulated panels the panels interlock easily providing ease of construction and thermal comfort the spatial arrangement of the different rooms was arrived at by combining modern techniques of simulation with the age old principles of vastu shastra the ancient Indian science of architecture multifunctional spaces and modular furniture provide a compact yet comfortable living space we have used the Indian concept of a veranda which acts as a buffer space and minimizes heat came the Jali another traditional Indian element induces ventilation while providing protection from radiation passive solar architecture and natural lighting design ensure that the windows walls and spaces reduce artificial cooling requirements the roof has a 5 kilowatt peak photovoltaic system to meet all the electricity requirements of the house a novel PV thermal system provides hot water for bathing washing dishes etc being a net energy positive house it supplies more electricity to the grid than it consumes H naught will be a part of a four-storeyed building cluster ensuring a high standard of life and a vibrant culture with the rapid development of India the major cities are getting saturated and the peri urban areas are emerging as the new growth centers the proposed delhi mumbai industrial corridor which connects two of the country's biggest nodes by road and rail will see a substantial growth in industries and as a result jobs lying along the dm ic very close to mumbai is uran making it an ideal site to show the application of our concept projects such as the dm ic coupled with our housing model will make india an inspiration for all developing countries to grow in a sustainable manner team shunya building a sustainable future