Player is loading...
Holistic, multi-dimensional analysis of shading impacts on an all-glass office building
Jason Kirkpatrick, Interface Engineering, San Francisco, United States
Tuesday, Oct. 29, 2019 · 11:44 a.m. · 13m 33s
Impact of shading system design on incident radiation and energy efficiency - Impact of shading system design on daylighting performance - Impact of shading design on thermal and visual comfort
Embed
Transcriptions
Note: this content has been automatically generated.
00:00:00
kirkpatrick i work with interface engineering and simply says go uh united states
00:00:05
um we are an any key a company idea and mechanical engineer is easy to eat
00:00:10
uh and i also form a lot of of building performance analyses
00:00:14
men often asked to an allies uh the effects of uh she insisted
00:00:19
a whole building energy consumption and uh as we've discussed sometimes act
00:00:24
yeah maybe a little bit muted relative to the uh investing costa require of the systems
00:00:35
ah have multi dimensional analysis of shading and pass on its role in all facets building um
00:00:41
so really we're looking at the impact of shading systems design on it incident
00:00:46
radiation as well as the uh and your energy consumption and the design cooling capacity
00:00:52
as well as the impacts on a daily performance thermal and visual
00:00:55
come for a really in order to uh get a full assessments of
00:00:59
uh the impacts of the shading system we need to look at these other axes besides
00:01:04
building energy consumption uh as we can see here i did include the uh this versus
00:01:09
the side with this they live in analysis and this is the sum position either side
00:01:16
offered to this quickly um really two allies the building of
00:01:20
this size uh and to to a number of iterations uh uh
00:01:25
parametric design is really required and so for this i used the
00:01:29
tool caught a rhino with grasshopper and it allows you to do well
00:01:33
a visual programming analysis to create shading geometry uh for
00:01:38
this one i hosted a the shading geometry to each window
00:01:42
and use three three factors avian see here sample low uh the
00:01:47
projection a datsun angle uh of the fence that were being analysed
00:01:53
uh in here we can see the results of each individual a component of the side that was being allies
00:01:59
as i could as i said before there's a very large building and so computationally it takes a lot of times you will uh
00:02:06
perform the analysis in so i broke it up
00:02:08
into smaller pieces in order to examine each company individually
00:02:12
uh this is just an example of one of those
00:02:15
portions of the side that we perform this radiation analysis on
00:02:20
uh and here we're just showing the uh transmitted he gained through the glass incorporating
00:02:26
the uh solar heating coefficient glasses well was uh considering the effect of the shading
00:02:32
and the architect uh whence examined different angles of up in depth and
00:02:39
a rotation and so this was the one that we ended up with a
00:02:43
and out the mice design uh it's an eighteen inch long and uh then
00:02:47
that's attached to the mall in and it's rotated thirty degrees um the whole building energy model is
00:02:54
the with all the shaving integrated uh and as is
00:02:58
mentioned as as mentioned before uh we really wanted to include
00:03:03
mechanical system as designed within the energy model in order to understand the impact the
00:03:08
shaving within the context of or building especially because within california we have these calls with
00:03:14
uh oh electrification and so our building design really was
00:03:18
all electric and we were trying to facilitate a this design
00:03:23
as you can see we had food cool worse with a worse we'll see ponce dedicated or system recovery
00:03:29
again it's all electric building design is pretty you need for
00:03:32
this uh area i really enabled by the mouth whether sepsis go
00:03:37
um so we could see her magically here that that thirty
00:03:41
inch fan you know certainly saves a lot of calling capacity
00:03:45
uh incrementally more but that's certainly a very deep
00:03:49
there and and so um we can also see that
00:03:53
the heating energy usage as you prevents or gain will start increase uh
00:04:00
while you're compensating for the clean energy usage average options
00:04:04
and so the total um incremental benefits of adding more
00:04:09
more fan uh it really loses its uh benefits in
00:04:13
the uh uh as you add more more than that
00:04:18
um but what you really do see is that uh the cool wayne
00:04:24
the cooling capacity reduction is really a driven by
00:04:28
this reduction in uh incidents or radiation and so
00:04:32
um with the eighteen inch then rotated thirty degrees are able to achieve
00:04:37
eight thirty five percent reduction in require a cooling capacity um
00:04:43
n. c. as i mentioned earlier on uh what aspects to really demonstrate why we'll
00:04:49
want to have such a calling such a shade insistent is uh the thermal comfort
00:04:55
and so this is just a tool provided by this our sever the built environment out of a berkeley
00:05:01
and it includes the uh impacts new reading temperature air temperature
00:05:05
airspeed uh on covered and you can see here the red dot
00:05:09
is the current uh condition this is without the shading and then with the shading uh it becomes much more to
00:05:17
so
00:05:18
we also for the same project we're looking at the thirty
00:05:22
foot a curtain wall that was part of the lot we design
00:05:26
and so the architect in a desire for transparency of this a portion
00:05:31
of the building they yeah one to consider a clear going seen case with
00:05:36
no we film and this is a you know a very large amount of solar heating
00:05:42
oh and so to other alterations were considered away emanating clean case it
00:05:47
again with louisville and the i. g. u. case um which we prefer
00:05:52
uh to to other questions that were really coming up uh this
00:05:56
visibility new lies in radiant system in this portion the building and so
00:06:01
there was a fixed a capacity that we could handle in
00:06:04
terms of the transmitter cool when logan so we really limited
00:06:08
uh by our ability to provide useful calling based on area that was available
00:06:13
um and also the architect had a question regarding
00:06:17
the necessity of uh including four shades in their design
00:06:22
so as as mentioned before um very it's very true that this selective well we coding does a very
00:06:29
good job it reduce in the uh so he came at a higher i. r. and the the spectrum uh
00:06:38
and this calculation demonstrates the impact of the different ways in selections on the
00:06:44
transmitted so he gain as well as the uh provided cooling capacity that was available
00:06:51
and you could see in the first case that the total
00:06:53
he can rate was much larger than are available system capacity
00:06:57
uh and so really this necessitated us to
00:07:00
use at least eliminating glazing with the low ethan
00:07:07
i'm here and i'm depicting the mean rate
00:07:10
in temperature for uh the space this large uh
00:07:15
what are the area with the thirty foot tall glass uh walls and so
00:07:20
you can see here on the x. axis reaches these uh graphs
00:07:24
the a month of the year and b. y. axes contains the
00:07:28
uh hour of the day and so really the shows all the
00:07:32
date of for the for your your knee thermal cover for the space
00:07:37
and this is colour coded such that um about eighty
00:07:40
six degrees fahrenheit a a new radiant temperatures read in so
00:07:45
that indicates a where thermal comfort was really becoming too hot uh for
00:07:50
this space and this is a calculator again using that see the eternal comfortable
00:07:57
i i again with the first case without the
00:08:01
well we coding and including um internal glass shades
00:08:05
anyway in temperature of the a curtain wall was so large that um
00:08:11
it incurred sing it can hours of a thermal discomfort nine hundred eleven hours a shown here
00:08:18
where is um by ad in that store control where we were able to reduce that's it
00:08:24
two zero and you can also see on the call them to overstep cisco is you know
00:08:29
certainly not so cold uh uh some other places but um
00:08:34
the impact of the uh using the i. g. you can be
00:08:37
seen at the well when the the the tail end of the distribution
00:08:42
uh indicating that warmer space amateurs are maintained it as cold hours a
00:08:47
still we've just showing just three hours of discomfort uh for this scenario
00:08:53
uh it this
00:08:56
this is another x. is that this is a widely spaced is analysed uh the
00:09:02
they like the enquirer probability t. g. p. is a
00:09:05
a metric is used in the lighting simulations to understand
00:09:10
you know the impact of uh the day why don't space and
00:09:13
if a nice been might be a perceiving where in the space
00:09:18
the top left is um the question you know this is trying to answer the question
00:09:23
whether or not the roar shades are a necessity for this
00:09:26
space and this is pacing southwest so you could see um
00:09:31
it the left one that this is a very high core probability uh where as on the right
00:09:36
side we did indicate a with the chaise down only to the trance on the top of the door
00:09:42
uh that we were able to mitigate the
00:09:44
a glare condition for uh the worst case scenarios
00:09:49
you can also see um well we ended up recommending
00:09:52
a slightly open fry fabric to allow for day like maturation
00:09:57
while the blinds are deployed uh these are also mariah shades
00:10:00
and so they will be controlled by the uh building automation system
00:10:04
uh again this is radiant system and the space uh
00:10:08
and then below at the bottom we see uh any will
00:10:12
t. g. t. values so the same idea of a flight part with the you know the x.
00:10:16
axis being amount to be year and the a i. y. axis bean the hour of the day
00:10:23
and so it's colour coded for each hour were green would indicate
00:10:27
but uh there's nowhere occurring for the situation a yellow is uh
00:10:33
mildly are perceptible where orange would be
00:10:36
disturbing glare and read would be intolerable colour
00:10:41
uh we can really see in this comparison that uh
00:10:45
uh the inclusion the shades dramatically improves the uh uh
00:10:50
well reduces anywhere that you would happen space so it makes it much
00:10:54
more visually constable so we've demonstrated that this is because it more visual
00:11:00
more visually constable as well as more terribly comfortable um and so really we've concluded here that uh
00:11:07
the throne visual covered implications of the curtain wall
00:11:11
assembly really require that uh the when any case
00:11:16
included a low you coding and this was a again a low
00:11:19
iron last uh for clarity in transparency uh otherwise we would have
00:11:24
required additional cooling capacity to provide into the
00:11:28
design which would require additional design changes uh
00:11:32
the architects did not have any room for additional errors users and the radiant system was fully
00:11:37
maxed out through the whole lobby and so really there is no additional capacity that could be added
00:11:43
uh to the space uh so we did really push them towards having those or control where
00:11:50
now that was the only situation that would allow for the
00:11:54
really insistent to uh be deployed in this context and so
00:11:59
uh we really were pushing architect to include this uh system
00:12:04
uh and also that the uh uh the roller shades were in fact necessary
00:12:09
to prevent so uh the visual discomfort that would occur due to the large for a while
00:12:16
so my broader conclusions were that the parametric design tools that we use um
00:12:23
a lesson performing robust in iterative analyses uh in
00:12:27
so and these were coupled between multiple models uh
00:12:33
right model and radiation model um and that
00:12:36
the design controllers it's saris or control systems may
00:12:40
be somewhat small in terms of ability in energy use savings uh and so
00:12:46
really we are seen often that the cooling energy savings is offset by
00:12:51
he in energy increases that uh occur and so
00:12:56
finally the source shading systems may be seen as more cost effective uh and beneficial to the project
00:13:02
if you consider that uh the reduction the pretty cool when well well for this more mechanical systems
00:13:09
and that there is a dramatic improvement in actually in a thermal and visual comfort
00:13:14
and i will say that uh i just heard that this projects it's quite a bit of money over the course of a
00:13:19
the bidding process by reducing mechanical system capacities and
00:13:24
so this is the very successful project for the architect
00:13:29
and any questions
Conference Program
Implementing a quality assurance program for sustainable buildings
Don Neff, LJP Construction Services, Irvine, United States
Oct. 28, 2019 · 4:34 p.m.
317 views
Performance of heat recovery using an Active Double Skin Façade
Michael Bulander & Kishore Patel, Harley Ellis Devereaux, Los Angeles, United States
Oct. 28, 2019 · 4:47 p.m.
468 views
A bio-inspired solution to raise the efficiency of kinetic façades
Steven Ware, Art & Build Architects, Paris, France
Oct. 28, 2019 · 5:36 p.m.
155 views
Concrete curtain walls - Status, benefits and visions
Stephan Giesser, Solidian, Germany
Oct. 29, 2019 · 8:32 a.m.
153 views
Advances in passive and active coatings technology for glass
Rory Back, NSG Pilkington, Lathom, United Kingdom
Oct. 29, 2019 · 9:59 a.m.
194 views
Why shading must be dynamic
Anders Hall, Somfy, Sweden
Oct. 29, 2019 · 10:46 a.m.
745 views
Glazing and shading that make the difference
Oskar Storm, Saint-Gobain Glass, Sweden
Oct. 29, 2019 · 11:01 a.m.
5344 views
Successful façade design by simulation
Sven Moosberger, EQUA Solutions, Switzerland
Oct. 29, 2019 · 11:17 a.m.
181 views
Digitally printed multi-colored PV for building integration
Dirk Hengevoss & Michaela Terwilliger, Resp: FHNW, Switzerland - Hochschule Luzern, Switzerland
Oct. 29, 2019 · 11:20 a.m.
Predictive controls for HVAC systems
Urs Grossenbacher, Pronoó AG, Givisiez, Switzerland
Oct. 29, 2019 · 11:32 a.m.
Holistic, multi-dimensional analysis of shading impacts on an all-glass office building
Jason Kirkpatrick, Interface Engineering, San Francisco, United States
Oct. 29, 2019 · 11:44 a.m.
Advanced daylight modeling of façade systems for energy and comfort analysis
David Geisler-Moroder, Bartenbach GmbH, Aldrans, Austria
Oct. 29, 2019 · 12:16 p.m.
New building glass envelope with Light, Color and Images
Ion Luh, Consullux Lighting Consultants/CEL, Canada
Oct. 29, 2019 · 2:49 p.m.
The Desert Rose - When poesy meets technology
Nassim Saoud, Trimble Consulting, Paris, France
Oct. 29, 2019 · 4:30 p.m.
372 views
Recommended talks
Constitutive equations in flowsheets - part 1
Prof. François Maréchal, EPFL
Feb. 23, 2012 · 11:21 a.m.
124 views