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Glazing and shading that make the difference
Oskar Storm, Saint-Gobain Glass, Sweden
Tuesday, Oct. 29, 2019 · 11:01 a.m. · 14m 41s
High-performance, cost-effective glazing - Finding the right combination of glazing and shading - Options for façade-integrated PV
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Transcriptions
Note: this content has been automatically generated.
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lot of the the people requirement really but the legal requirements coming uh now
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uh the sail options to meet energy performance of
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buildings directive annie and seventy no thirty seven requirements
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what is that uh we have the energy performance of buildings directive big factor uh this year
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uh say that we are not allowed to build anything more than your zero energy buildings
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and for glass that means that it should last gets cold so more heating
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a glass brings overheating soul a smaller classes
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darker glasses if we interpret that as a counterweight we just have the
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yeah seventy no thirty seven for daylight in buildings
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uh accepted in december last year and it talks a
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about bigger windows views to the outside for a
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mm which is actually a very important for user comfort
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so uh the new norms uh it creates a
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frightening many people and as is full blast buildings
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if we look at simon's to reduce the chairman of
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the royal institute of british architects sustainability group he says that
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the connection needs to be made between the climate emergency
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and all blast buildings but the connection hasn't been made yet
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so this conclusion is that to mitigate the amount of energy used to cool these buildings
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you have to produce a really complicated to say which is usually triple glazed
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so this is what he sees for the future uh huh and also
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for say and triple classes uh it really scares a lot of people
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so i want to focus a little bit on the triple blast uh but so if you say
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that it's not really difficult to find a way to to to mitigate these needs if you use
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the products are saying the bank together with the
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automation from some fee and calculated in the aqua tools
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so what i want to talk about today is the energy
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performance of buildings directive focusing on the side you value an overheating
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and then the and seventy no thirty seven focusing on daylight factor of you to the outside
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and then a little bit of of how we can get plus energy to the building to reach the role
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um when it comes to you well you blasts uh
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i see that two meets the no new energy demands
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windows where markets will you single blast need to move the bar double
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bass markets where we uh use double blast need to move to triple bus
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i'm already tripled last market needs to take further steps um
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so if we look at the what people say about triple glass
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it's like climate loads make triple glass ugly and shorten the life span
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so here we see a triangle units don't go triangular untroubled last
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to say because the climate lows we read you make it look bad
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but this is a standard double glasses saves you can make the time to load you
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always have to think about how the climate of the fact that the state no matter what
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triple glasses very dark a triple glass or double last ten years ago
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double uh with the lowly well like eighty percent almost and
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triple bus today use products we reach almost the same liked level
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and then we think about the images and and this is actually my first uh a
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project with this new blasts and this is triple blast and it doesn't look like triple bus
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a triple last prevents tristan harvesting this is a very important argument
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we can also see that the total energy transmission all the double glass ten years ago
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is met by the triple blast today so uh think about how to use the arguments
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uh and think about the winter calm for not only the you value advantage
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of the triple blasted also the winter concert advantage all the triple blast unit
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i've taken the the you know we can program called down crossed two point three it
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was designed by the glass of a sort of leaning it together with the example again
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and changed a little bit uh the outside temperature and the wind speed compared
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to the normal e. m. standard and then we see that for the double glass
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the inside temperature of the blast is five degrees below all the room temperature
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whether it's as if you use a triple last it's only a three degrees difference
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and that creates a big impact on the comfort this is
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zero point fifteen s. where one meter away from the first say
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we start feeling discomfort because of the cold draft the window because
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the window if it shows you it chills you to the ball
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and if we look uh to the double glass uh this uh in the
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case i had a one point two meters on the window you start feeling this
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whether as a triple bass you you have a to meet no not you have a one meter high window
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a triple r.s we can have a two meters tall window before it's it's called
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last because if you get a cold draft the taller the window stronger the draft becomes
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and if you have a glass roof uh with the convection problems in the double glass you can see that
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uh at a at a triple last unit allows
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for three times bigger glass before we get your movement
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an air movement is difficult if you want to do design your h. rack system so
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every moment will clean room is difficult to handle also for the ventilation in comfort it's easier
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for the nordic says i said a triple class alone is not
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the solution you have to think about the geometry of the building
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if you have a a small narrow window even with the
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good values you gets a like one point two for the window
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you have to go up to like two and a half square meters before
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we can say zero eight zero eight being the new norm for windows in norway
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and this nice building here which has all the right materials in all the right places
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it still has like the you are you all zero eight or something for the state
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because of all the call bridges and knew the monsters we can talk about a
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zero five so this nice building in the end is like one of its kind
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if you look at the to say geometry needed to do you reach zero five we
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have like a horizontal way unless a vertical way to avoid toll bridges to have like
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a window band and big span roles or to have every
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second thing being floor to ceiling window or floor to ceiling spaniel
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so when we could talk about the sage you value moving to triple glasses
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one thing and then thinking about the geometry if we still need to move further
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how does that influence the daylight factor if a lot that they even said that you know to thirty seven for daylight in buildings
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is divided in daylight provision exposure to sunlight you to outside of protection from
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blair all focus on the day like tradition and the due to the outside
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for the full blast to say uh it allows a very deep they like penetration
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which is good like for north to say like in this tangle martha's in in stockholm best office in sweden both
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the you can behind the full blast to say you can have a very deep office space so uh if you have
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less daylight uh you have a more narrow space for offices here
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is like the vertical to say it i tried to design in like
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uh uh the uh the vertical span rules and you see that they they
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really block the horse on the views to the outside and they diminished daylight uh_huh
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if we look instead at the horizontal window band is still diminishes the daylight so we
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need a very high like transmission in the glass especially if we go down to like
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thirty percent when the area which is not uncommon it gets dark if we
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have to dark windows the office space according to the normal will become very narrow
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so talking about the and seventy no thirty seven what no
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matter what you think about this tactics the horizontal design is preferred
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overheating is the next is you if you have a fifty percent
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window area uh and the sun is shining at the low angle
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you need to have below zero point two or less than twenty percent energy
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transmission for so office maybe even less than the ten percent attendance was talking about
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and the tradition nordic solution is to use the outside shader
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and uh a glass with the light transmission of about seventy percent
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the d. told the values about fifteen percent energy transmission in the solution
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the problem is that even on a cloudy day like this the
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shape that now and because of the high energy transmission of the windows
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so uh if we instead look at solo controlled last we can
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see that quilting development has been good here as well to us all
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ten years ago and the double bass we can get the same day light uh in the triple a today
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and so we can choose between stable i think alike transmission from double to triple or
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we go down a little bit in like transmission and or ah down really a lot in the energy transmission
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and the solo reflective glasses so it's becomes together with an inside
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shader this project here uh the total energy transmission is thirteen percent
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uh this one is like fifteen percent depending on the choice all the interior of fabric
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and eh here is also one finalise project we can see
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that the shakers are in these windows
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and uh and uh you see that here is a shader years no shader is not such a
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big aesthetic thing uh but it brings the the volume down from zero l. thirty two zero fifty
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and how's that on the stand with the software for mac well this is the triangle
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uh where in uh uh you guys four point eight
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spectral properties of last things in shading material so use so
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spectral calculation is introduced for placing an integrated son shapes
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this means that the properties of the whole blazing sun shades system
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are calculated each wavelength interval spectral calculations give higher accuracy the non spectrum
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modern blazing in shaping materials non spectral calculations can give significant
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errors larger than ten percent and viable systems combination maybe missed
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with a viable systems combination is to have a low reflected last with the energy transmission is only
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in the visible range uh and blocking out the fifty five percent infrared that is
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there and then to have a higher effective shader that sort of reflects the rest out
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which requires uh of course uh say automation like on the set
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and the good thing uh about this program it's not unique to have spectral calculation but it's unique to
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put it into the full building simulation and even more unique to have a little brother call this bill
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this is the free where where you can take classes full
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spectral from not only signed a bag but also building taller interplay
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under or over six hundred different fabrics in there that you can choose
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from to get your special full spectral a solution with glass and shader
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and so uh uh this one you learn in about forty five minutes this one you learned about forty five years
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so uh it's good to be able to have an exchange between stakeholders like that
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but the the i'm never going to going to that program just look at in the act was that when you're overwhelmed
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so oh what about the small selloff this i thought about zero ten i mean we see that in you extra light
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uh uh solar control last it actually meets the light transmission
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that we had a standard triple bass like ten years ago
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meaning that you can fulfil a little time daylight a
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a calculation with a solar control blast and an outside shader
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bring the total devalued down from the zero fifteen to zero zero eight you
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need and have the advantage of not having to pull the shader styles or something
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they're also the niche products that console this like integrated lines in the in the
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uh in the solar control blasts and it looks a really nice from the
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inside and of course uh the electrical blast solutions also can do this for you
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um but i think that also niche products of overheating i say that to get below zero twenty
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you need an inside shader and it breaks over control blasts the writing such a don't write ultimate station
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to get below zero ten uh the outside shader with the sole control classes like the mainstream solution
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finally uh about spam roles is this like waste of space to just have them for decorative purposes
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when in fact the cost of the silicate cell has
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dropped immensely over the last year's meaning that even for positions
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where we don't have the full efficiency of the full double tied we can still use it
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and then uh it's basically used as a a double laminate which is expandable
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if we have a please low window shares why use the window area to to have solar cells
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the pro the the look really dark and all that's a problem actually swallow all the light and all the energy
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so there are possibilities of decorating them like hearing green using some fifteen percent of efficiency
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hearing white using some fifty percent efficiency but still bring something to the
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building i especially like the the the roof tile a hopeful double talk
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but here we see the problem that's a whole building is designed to look like i say look at cell
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and in fact here we have the building integrated portable timex have such a low reflection
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that they just become like dark holes in the for site and here we need
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to think about how to design them to make them attractive in the to say
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it's a it's a like a trade off between efficiency and looks like always
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or ah so i've talked about the energy form of
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the buildings directive how it affects the say you valiant overheating
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the and seventy no thirty seven and daylight factor of use to the
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outside and how we can get some plus energy enough bundles of thank you
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