Gerrits Tagebuch Vol.33: / Klimasteuerung & Bilder von Testflügen des China Eastern A330

Uploaded by MiWuLaTV on 28.09.2012

Welcome to the new episode of Gerrit's Diary.
Finally, a new airplane. That's why I'll show this first,
before I come to the air conditioning system, as promised.
The plane is fully configured, so
all poles are set, take-off and landing have been tested,
the lighting is configured and a test drive has been completed.
We'll capture the maiden flight for the end of the episode.
I've long promised to tell you about the air-conditioning and ventilating systems
in the Wunderland. That's why I'm in the construction management office.
We have many building operations: Opening ceilings, creating new floors,
planning electricity wirings, these things are done here.
Also, the planning of the air-conditioning and ventilating system.
The building has five floors, we're using three of them.
And in these three floors we have up to a thousand people.
A thousand people are 1.000 little radiators, giving off 150 Watt of heat
and breathing out 100 ml of humidity per hour.
This combination of heat and humidity isn't good.
So we need a huge attic floor full with air-conditioning technology.
Let me introduce Dirk to you, he can explain it better
because Dirk planned the whole thing.
Also, I don't know all the technical facts.
We have ten technical devices for ventilation,
or air-conditioners, without sounding needlessly complicated,
mostly spread out in the fifth floor.
It looks a bit chaotic but there's no other way to show it,
because this huge building is divided into many individual houses.
We can't put a huge duct up here
and just install one large machine.
We have separate houses, each sealed off by fire barriers.
It's a terrible hassle to divide them with fire dampers.
So we have a simple approach:
We install a ventilation unit in each house
and try to distribute the air from there.
Also, it's under monumental protection.
We can't just tear down walls or open ceilings for more air.
It has to be unobtrusive and not visible from the outside.
So, the amount of air is limited
and the height of the ceiling is much too low.
A tall man's head would be in the midst of bad air which rises to the top.
If we had one metre more ceiling height, we could save one third of our air power
because the bad air would gather at the top and we'd have enough time to get rid of it
without having to do so immediately, as it is now,
because especially tall people would complain about the bad air.
The next problem: Dust. We hate dust.
For that reason, you thought of blowing in air above the layout.
The air velocity can be higher up there because it's not yet in contact with people.
Then it expands outwards to the hallways and is sucked in above the hallways,
so we try to get the dust away from the layout and into the hallways.
I could continue explaining but it's better if you just show us. - Let's do that!
We're standing here at the very beginning of the building.
Here are our three oldest ventilating systems, conventional technology.
Conventional means: Outside air enters
- it's heated in the wintertime and cooled during summer -
and returns when stale and is blowed out.
On the way out, the air streams cross once
in order to save the energy that we draw out of the Wunderland
- because warm air comes back in the winter.
The heat is absorbed by the fresh supply of air and we save a lot of energy that way.
We use district heating to heat during winter, that's not very interesting.
But cooling during summer is a challenge!
Our cooling unit generates 130 Kilowatts of coldness,
which it emits as hot air over the roof outside.
How hot is the air that it emits?
45 to 50 degrees Celsius.
So we have brought the hot air outside and over the building.
But right next to it, we are only allowed to use the roof, there's also the supply air.
And we don't want the old air to come inside again.
And depending on the wind, that can be a challenge.
This is our new paradise.
We are here in our new main ventilation, there are three ventilation units.
The unit for Hamburg-USA,
and this large device is split in two for the restaurant.
A lot of heat and fat-contaminated air emerges from the kitchen.
Our unit uses UVC radiation to break down the fat into its individual components
which is then extracted as powder by filters. That way, we are able to use the heat
generated by a deep fryer and then taken from the exhausting air as heating air.
With these units, we may soon forego long-distance heating
because we can also use the waste heat of the cooling cells in our cooling units.
And how do we generate cold in our new system?
This is our new gem, a new technology.
For those interested in further details: Look up Turbocor on the internet.
This little device generates as much cold as our five other cooling units together,
and only uses 25% of the energy when it's in the optimal range of efficiency.
It's designed to work in a well-known range of usage.
It's performance under partial load is great but it's not very efficient under full-load.
But since we only need the partial load most of the time, we are saving 60% of power. - At least.
It's comparable to the turbo of a car.
These things do 35.000 revolutions a minute, with a magnetic bearing,
so we have very little frictional loss - it's just a really cool technology.
The cooling of this device is also new.
We have a water cooling system.
Using a warning system, cooling water is injected into this cooling tower.
Then air is added. Using evaporation ducts, the water is cooled down again
and returns into the cycle.
After the cooling water is generated, it flows to four buffer storages.
We need four of these because we always want redundant systems.
If something breaks down or if it's really hot outside,
then we can use the other units to add cooling water
and use these buffers to gradually adjust the temperature.
Because this device doesn't like sudden variations in temperature.
That was the short version so far.
I'm sure I forgot over 1000%.
Thank you for the great explanation.
Let's continue to the control technology.
This whole room is the new ventilating system,
in effect since the second floor has been in operation.
It's standing on a steel framework
because several tons of weight must be distributed in a way
that the carrying capacity of the ceiling isn't exceeded.
There's also a basin here. If something should happen,
then this basin can hold 2.000 litres of fluids.
When these machines, with a weight of up to five tons, were put here,
we couldn't just roll them in over the roof, it would have collapsed.
We had to build a special framework just for the transport to distribute the weight
in order to bring the device to the place where it now stands.
That was my attempt to explain all the ventilating systems in a few minutes.
At peak performance, they move up to 90.000 mł of air and generate 900 kW of cold.
All units and secondary units have their own controls.
Each unit is specifically optimised,
so that the control always gets the most out of the system.
It's more difficult to regard them together,
to make sure that the unit on the left knows what the unit on the right is doing,
because the air may mix when passing through the doors in the Wunderland.
So we decided to create a system five years ago,
where we are able to collect all data on one display.
For this purpose, we have installed over 100 thermometers.
We've installed them in each air duct.
We're connected to the individual control systems to gather information.
We use a CanOpen system.
These distribution boxes are installed everywhere,
and they send all the information over a bus-system to the computer.
From there, we are able to control everything manually.
I may re-adjust the temperature here.
We're also trying to introduce global automations,
so that this software will eventually control the whole Wunderland
and to make the system implement the orders of the main software,
because they know their range of efficiency and how the heat energy recovery works.
That will be handled by the control of each individual system.
Back from the roof, I'm now at the control console.
The topic was a bit dry above, but now it becomes more colourful.
The control shows it all at once:
Every ventilating system, the cooling units, the buffers,
and especially: Thermometers, thermometers, thermometers.
I may display the development curve for every water and room temperature
of the past three years or do a target/performance comparison
to draw my conclusions. We're basically controlling the whole system from here,
and we're actually doing very well with it, and hopefully, also our guests.
That's it for today. I'd like to say goodbye, as promised with pictures
of the new China Eastern machine, there's also
an old friend that I'll talk about in more detail next time.
I'll also talk about the new harbour city.
See you then, thank you and goodbye!
By the way, this is also new.
It's a camera that live-streams a 360 degree view over the internet.
It's a cooperation with Google, we'll show the link below.