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Successful façade design by simulation
Sven Moosberger, EQUA Solutions, Switzerland
Tuesday, Oct. 29, 2019 · 11:17 a.m. · 14m 48s
Simulating dynamic building skins - Photovoltaics in whole-building simulation - Daylight ray tracing and CFD
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a half of a peace sign was simulation can look like i hope you have forty five years
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um uh i want to give you an idea of how that could
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uh look like and and before i i will give you a demo small the more
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uh but before i try to explain a little bit what we mean a a with a building simulation
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uh we think it needs to be a whole building approach uh it's not only
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just keen that the uh includes a building system and a billing system is uh
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is quite complex it's also the h. rex system and and and and controls
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and uh in a good simulations there are about thousand signals per room
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and with the signal so i mean quantities that theoretically can be measured
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um like see you two temperatures and and all the others
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um and you should use the same model for heating cooling and energy studies
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because if you don't eat if you just look at energy you all the best thing is to to turn off heating and cooling
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uh and also daylight see if the uh uh like like uh um yeah uh
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uh air air currents calculation a fluid dynamics
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uh is also a important for for comfort
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uh so that uh is good if this is included as well because competence actually
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the reason why human half buildings of course uh if you don't want comfort you don't need buildings
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um yeah and today it's almost exclusively used uh
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in a as a as a design tool today
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but uh it will be used uh in the near future also and operational face to face of buildings
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uh quite a few uh a local or national uh or also global certification
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uh systems or or or or uh or uh um yeah uh require also simulation
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um and that can differ very much from country to country
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when we now look at the uh building skin this uh we need to some physics of course
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uh we need some physics uh what is happening outside to skin
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so the local weather a nearby risking nazi includes radiation and and wind
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uh we should look like a a in know what happens in side to screen
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and so when the glazing a a lot happens a lot with
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the radiation you we have some shading systems here i'm like these um
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a construction before have state we can have air current with a fruit of
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aside as well and of course we can of panels uh uh where we
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uh converge energy in within the skin and then of course we should lock
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look into the screen what is inside to skin and there we have this um
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um external external loads but we also have internal loads uh it needs to
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be completed with those and we have some some local heating and cooling systems
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uh and this gives actually the whole situation and
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and you can calculate then the comfort uh with
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and as i said it's not only the building skin uh there are two
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of three parts main parts of a building system there is the h. rex system
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and there are the controls and all these three should always
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be a i calculated in a uh in a commonly yes
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and i'll only if you do do is you get the really uh also
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accuracy so this is a this is a comparison between measurements and and simulation
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so away you heard about these uh tools called i know i us with a little broader at all
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uh and these are actually the steps we have we have the uh
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free right to less polite uh at the bottom that's a tool you can
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yeah you can start and and work with so we were there is not actually uh
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introduction all phase you need it's just uh working with why would s.
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poll a you can uh you can uh perches and and you will
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maybe need a one two days to introduce yourself to the software and you can use it
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to once a month or something like this while the other tools there are more professional like nations
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where uh you probably need to be a a simulation
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expert uh and uh and and use it in a
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maybe not daily but weekly a weekly frequency
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uh of course you can do a more things then with these professional
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versions so let me give you a look inside his tools uh uh inside this tool um
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i start with the s. paul
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if um my computer is waking up
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so that's the risk of a lifetime
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uh uh so you you have a a room of course you can uh eddie the the
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the shape of the room if you want a we will not looking to this now
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uh uh there is also possible it to um
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uh to input some usage data and some uh
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systems uh that we look now uh into the window
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uh of course years well you can uh change some um
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a janitor valuables a recess for instance and so on
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and once the german trees is there you can um so like the glazing uh you
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have a product database where you can select any glazing here ah like this one for instance
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that and the show at tape uh uh for shading you
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you select first the type of trading we take the exterior screen
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and uh of course there you have uh some materials
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as well where you have some product product data uh again
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so uh there's some genetic data um of uh of the shading as well
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and once you're down there you can already start and and and look at the
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at that properties of of the combination of a glazing and
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and and i'm shading so these are the reports that normal
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normally you will find in a in glazing calculation
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tools you also have to spectral data here uh
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and that's where where they and and
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here actually a a simulation or calculations starts
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so it it continues with the control you can select
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a control uh so why choose the they like control
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uh you could also um study some a
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window opening and and ventilation natural ventilation here
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uh we will not do it now uh i will now save that window type
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and it's my window from i'm building and they can use it uh more than a
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one time then so i can have my window weeks here uh once more uh on the
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justin for state and here i will now a change to control uh it's not
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by daylight now it's by radiation solar radiation uh like this and once i'm done um
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i go to the simulation camp and i start recording load calculation for a september
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and to to calculate me a typical um a cooling situation um
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and uh yeah that's one one hot day that will be calculated uh and
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we will see here uh for instance we can also given more than one room
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uh so this room has a six hundred what a cooling load uh that is covered by
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uh the cooling unit uh of three hundred seventy watts and and two hundred watts is taking the
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a a is removed by a but intellectually doesn't sum up to six hundred that's due
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to the light and heat that is also taken away by uh by ventilation for those who
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reliance these and there is some graphs as well so you can see what's happening in this room
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uh you see that cooling yeah it's working here
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uh to to twenty five degrees is the is the
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a set up uh the the set point uh we have some
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operation operative temperature that is higher and then the room and temperature
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and we have a heat balance the dynamic keep balance you see the
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uh solar load that is the main load here into loads a bit smaller
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uh so that's what's the load of the room and here in in
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bright blue we you can see the the f. active cooling load of two
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dark blue was the ventilation cooling
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um yes i can go now to the next level uh as all this is idle eyes this is uh
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uh the the deeper level here uh what i can do here uh i can i can look at
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the room again you can see it's the same it's the same um model here uh and that's the window
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a form you can see already here it's a bit bigger you have some more in court and you
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can look at the controls so this one is looking
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like these uh the other one uh will look different
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uh here it's more complex but you can also go
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to a pilot here and use these control blocks to
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to uh define your own uh control so you can really do uh
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whatever you like um i will now orders some results here as well
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uh okay and uh uh to get these results i need to recalculate
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so that's actually the same calculation that will be done now but uh we will have some more results
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ah and we can also dynamically um um
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animate these results then at the end so
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oh sure it's here
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so show operative temperature uh and
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control of the shading and shadows so like this you see now what's happening when the
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sun is coming in the shade a shade so going down is the different control for both
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uh and the operative temperatures in colder here so you can also
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animate and and and and show a results in very different ways
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uh then now prepared some other things so that
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the the same thing can be down for uh
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whole buildings as well that that was this one uh i'll try to make an animation here as well
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um
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uh any me the the like here maybe you missed the line to use some scale
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the walls of the shuttles and and is probably on we have
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a we have a restaurant there have special shavings and they are also
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a controlled somehow so this works for entire buildings as well
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and for yearly calculation so uh there is the next day coming
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up and uh there will be some cloudy days as well and uh
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and like this you can have a statistical um um
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uh results also so how will from those what occur during during a year for instance
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so when the same model i also have some daylight results
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whole angle
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one was
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it's good
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well i i'll do it i i will not two minutes i have a problem with the models now um
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but anyway i can show that the right here
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in in this party or a like these i guess
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ah e. x. ray so uh you can
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see and daylight situation in this probably all here
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uh with the same a model daylight can also uh
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be investigated that the outer skin uh of the building
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so this is actually also um how the assimilation of daylight it shows the
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a yearly insulation on the building skins so that is useful for t. v. planning for instance
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so if you know what is you can better um planned um
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uh affordable tyke system and and call her um corporate um
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uh uh the building skein wherever you want with
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with a solar solar panels and uh and these
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strings will be important cell shading will be important
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uh to optimise this uh uh p. v. system
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the last thing i wanted to show was this one it's the c. f. d. so it's
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also it's again the same to you i can investigate uh if you have some some complex air
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uh air flows somewhere like in this double scan for say it so that's actually a
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a ventilation system the excelsior is drawn fruit is uh uh through this gap
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uh this is temperature that is shown so the air is heated up and it's
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it's extol stan wire this falls ceilings so there would be an excel stare
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the uh the the supplier is here uh
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some uh rotating at terminal and uh yeah you
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can you can uh include this a performance of
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this of this system uh to your whole really
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yeah that's uh what i wanted to show you if you want to see more you will find us that the bills
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