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The Digital Scroll Compressor - Improved Capacity Control But Is There a Downside?
The digital scroll compressor is a form of scroll compressor commonly used in commercial air conditioners. It uses an unloading mechanism to provide a form of capacity control.
In this video we will cover the digital scroll compressor and its pros and cons. In the next video of this series, we will cover the inverter scroll compressor for comparison.
The aim of these videos is to help HVAC engineers make more informed decisions when choosing air conditioning equipment.
Links to academic studies that plotted the efficiency of the digital scroll compressor:
docs.lib.purdue.edu/cgi/viewcontent.cgi?article=2671&context=icec
docplayer.net/15274978-Development-and-testing-of-a-multi-type-air-conditioner-without-using-ac-inverters.html
มุมมอง: 15 337

วีดีโอ

The Scroll Compressor - Basics & The Fixed Speed Type
มุมมอง 29K3 ปีที่แล้ว
Scroll compressors are the most common type of compressor used in commercial air conditioners. But there are sub types of the scroll compressor which can make things a bit confusing. In this video we will cover the basic operating principle of the scroll compressor and the pros and cons of the fixed speed type. In the next two videos we will discuss the digital scroll compressor and the inverte...
Return Air Bypass Mode For ERV & HRV Units - Demand Controlled Ventilation
มุมมอง 4.1K3 ปีที่แล้ว
Return Air Bypass is another ERV or HRV unit mode that involves a form of heat exchanger bypass. Its function is quite different to economy cycle mode though, so it is important to understand the difference. In this video we explain Return Air Bypass Mode and how it can further miminise energy consumption by matching ventilation rates with demand.
Economy Cycle Mode for ERV & HRV Units
มุมมอง 2.8K3 ปีที่แล้ว
At Air Change we often get asked how economy cycle mode works with Energy Recovery Ventilators or Heat Recovery Ventilators units. So in this video we will explain it! In our previous video, we covered how ERV & HRV units minimise an outside air load by transferring heat, or energy, between air being exhausted outside and fresh air being supplied inside. Despite saving large amounts of energy s...
ERV & HRV Units Explained
มุมมอง 125K3 ปีที่แล้ว
Energy Recovery Ventilators & Heat Recovery Ventilators explained - what they are used for and how they work. Buildings need fresh air for indoor air quality. But introducing fresh air comes with an energy penalty. This is where ERV & HRV units help.
Low Dew Point Refrigeration Systems for Dehumidification
มุมมอง 1.4K3 ปีที่แล้ว
Air Change ACDHUM and Precise Control Units can incorporate Low Dew Point DX Refrigeration Systems for dehumidifying air to particularly low moisture contents. In this video we explain how Low Dew Point DX systems work, and how they provide a simple solution for humidity sensitive HVAC projects.
Hybrid CHW & DX Cooling Systems Part 2: Improving Chiller Operating Efficiency
มุมมอง 2.9K3 ปีที่แล้ว
Air Change Precise Control Units can incorporate chilled water coils alongside DX refrigeration to form a hybrid cooling system. In this video, Part 2 of Hybrid Chilled Water and DX Cooling Systems, we will cover how hybrid PCUs can save energy by improving the efficiency of chillers, particularly those that are operating in humid climates. If you haven't seen the Part 1 video, make sure you ch...
Combined Pool Water Heating & Air Handling for Large Energy Savings!
มุมมอง 3.7K3 ปีที่แล้ว
Indoor pools are great fun. And the provide us with a means of exercise contributing to our health and wellbeing. But to say indoor pools are energy demanding is an understatement. The pool water heating, the indoor air temperature control, and the high ventilation rates all consume large amounts of energy! The Air Change Poolpac has long been regarded as the go to solution for delivering effic...
Hybrid CHW & DX Cooling Systems Part 1
มุมมอง 6K3 ปีที่แล้ว
Air Change Precise Control Units can incorporate chilled water coils alongside DX refrigeration systems to form a hybrid cooling system. In this video, part 1 of hybrid cooling systems, we will go over the basic operating principle of hybrid Precise Control Units and how they can help CHW cooling systems perform better in humid climates. Learn more about our PCU ranger here: www.airchange.com.a...
Dehumidification & Humidification Combined
มุมมอง 4.3K4 ปีที่แล้ว
Air Change DOAS & Dehumidification units can incorporate humidifiers for complete indoor humidity control. Humidification in HVAC design is likely to grow in importance, as numerous health studies have found that low humidity levels seem to increase the transmission of viruses. Air Change combined humidification units simplify site installation as separate pieces of equipment are not needed for...
The Art of the Chart, Part 1 - A Guide to the Psychrometric Chart
มุมมอง 7034 ปีที่แล้ว
The Art of the Chart, Part 1 - A Guide to the Psychrometric Chart and how it Makes the Invisible Visible. Dry bulb temperature, wet bulb temperature, relative humidity and humidity ratio are covered in this video. Some HVAC engineers may find the psychrometric chart to be a bit daunting or confusing. Or maybe they have a good understanding of it but see it as a non-essential tool. Well, in this...
Split Make-Up Air (SMA) Explainer Video
มุมมอง 1.4K4 ปีที่แล้ว
Air Change SMA units supply dehumidified make-up air in an energy efficient manner. SMA units can also help VRF systems perform better in humid climates. Learn more about our SMA range here: www.airchange.com.au/cms/?product=split-make-up-unit
Precise Control Unit (PCU) Explainer Video
มุมมอง 2.5K4 ปีที่แล้ว
Designing effective HVAC systems for humidity control can be challenging. Because of this, Air Change developed the Precise Control Unit range of dehumidifiers to help HVAC engineers implement the simplest and most reliable solution for humidity control. Air Change PCU - precise temperature and humidity control for any application. Learn more about our PCU range here: www.airchange.com.au/cms/?...

ความคิดเห็น

  • @MichelleJohnson-g6h
    @MichelleJohnson-g6h 2 วันที่ผ่านมา

    Hertha Valleys

  • @TravisLemay-j2s
    @TravisLemay-j2s 3 วันที่ผ่านมา

    Ankunding Ways

  • @ThomasClark-s6m
    @ThomasClark-s6m 6 วันที่ผ่านมา

    Emile Roads

  • @MelissaGrahamgy
    @MelissaGrahamgy 6 วันที่ผ่านมา

    Brown Lisa Hernandez Christopher Gonzalez Elizabeth

  • @JohnLowman-b7h
    @JohnLowman-b7h 7 วันที่ผ่านมา

    6437 Frida Square

  • @sceschia
    @sceschia 18 วันที่ผ่านมา

    Does anyone know how to connect this to Ecobee Smart thermostat?

  • @user-kp6ee6wv1b
    @user-kp6ee6wv1b หลายเดือนก่อน

    What about in a commercial situation where tons of humidity is created indoors that needs removed/exhausted. but also the area needs climatized.

  • @chetmyers7041
    @chetmyers7041 หลายเดือนก่อน

    Please delete background music in future videos. I will turn on my radio if I desire background distractions.

  • @bryananderson3787
    @bryananderson3787 2 หลายเดือนก่อน

    What would be the result/symptom if the solenoid were to get stuck in the open(unloading) position?

  • @IvoPavlik
    @IvoPavlik 2 หลายเดือนก่อน

    Came because of info Ran away because of music

  • @user-sv8fi4kn4h
    @user-sv8fi4kn4h 2 หลายเดือนก่อน

    waiting for part 2

  • @Sunxfan
    @Sunxfan 3 หลายเดือนก่อน

    GOOD,IS IT USE EC CENTRIFUGAL FAN ?

  • @sighpocket5
    @sighpocket5 3 หลายเดือนก่อน

    Nice!!!!!!

  • @RavarsenBlogspot
    @RavarsenBlogspot 4 หลายเดือนก่อน

    Why is this not more commonly known

  • @TinaWavelet
    @TinaWavelet 5 หลายเดือนก่อน

    Thanks god captions exist, i had to turn the volume down coz of background music

  • @TinaWavelet
    @TinaWavelet 5 หลายเดือนก่อน

    When will people learn not to use any background music in educational videos?

  • @shepherdboy9692
    @shepherdboy9692 6 หลายเดือนก่อน

    QUESTION: I am designing a house to build in Canada, so heating and cooling are necessary. I know an ERV is code and also good for air/humidity quality and health. If I were to choose a forced air furnace, would that be a completely separate set of duct work than the ERV? That would be a lot of duct work. With installing an ERV, what is the best whole-home cooling option? I'd be happy with hydronic radiant in-floor heating... but I also want whole-home AC and my design is not conducive to mini-split wall mounted heat pumps. So if I do a ducted forced-air heat pump... will that be a separate set of duct work from the ERV?

  • @GaddarKerim1
    @GaddarKerim1 7 หลายเดือนก่อน

    How does ERV remove moisture?

    • @drodriguez394
      @drodriguez394 หลายเดือนก่อน

      Mechanical cooling

  • @malludxb2019
    @malludxb2019 8 หลายเดือนก่อน

    So what is the diffrence compre with FAHU

  • @ernestoc36921
    @ernestoc36921 8 หลายเดือนก่อน

    Could you please turn up the music? I can still hear the narrator

  • @DrLachlanFetterplace
    @DrLachlanFetterplace 8 หลายเดือนก่อน

    Great video. Really clear explanation. One question: So with the ERV - is there some air exchange or how does the humidity get exchanged? If there is air exchange how to you clean exhaust air before (or after) it mixes, as it will have high co2 and airbourne virus particles etc? With a HEPA filter or similar for virus's? That won't scrub the co2 though will it?

    • @DragonsWrath886
      @DragonsWrath886 8 หลายเดือนก่อน

      This other video explains it better ( th-cam.com/video/QOSelUK6dpQ/w-d-xo.html ) but the material in the exchanger will be different. in an HRV where only heat is exchanged, the material will be metal, while an ERV may have a a cloth-like material (or silica?) that will wick away humidity from one air stream and will be picked up by the other. For the other question - filters. CO2 shouldn't be a concern since you're only exchanging heat. The exhaust air is still exhausted, unless you're using a system that returns some portion of the exhaust air, in which case you'd limit that return air accordingly.

  • @minitrekjatim
    @minitrekjatim 9 หลายเดือนก่อน

    Saya kesini setelah lihat komen om joy di chanel sebelah, masih terkait matic...mantep tips2nya, terutama pas nyimak alasan kenapa jangan sering pindah dari D N DN😊

  • @f.osborn1579
    @f.osborn1579 ปีที่แล้ว

    Thanks!

  • @baijopaul
    @baijopaul ปีที่แล้ว

    Any option to use in Church ? What about the cost factors ?

  • @zeeshanshah1573
    @zeeshanshah1573 ปีที่แล้ว

    Is there a 4000 cfm of fresh air i can get in with this

    • @hottubking1229
      @hottubking1229 6 หลายเดือนก่อน

      Yikes, are you trying to ventilate an apartment block?

  • @boatnoy
    @boatnoy ปีที่แล้ว

    Such a great content. Underrated

  • @vikican
    @vikican ปีที่แล้ว

    Annoying music, gave up watching this shit.

  • @nuvo-gq9iu
    @nuvo-gq9iu ปีที่แล้ว

    If I'm in a house and I find a unit how can I tell if it is an HRV or an ERV by looking at it? I looked up the model number but the model comes in both HRV and ERV versions and I couldn't find any labeling that stated one or the other.

    • @CJZ964
      @CJZ964 2 หลายเดือนก่อน

      Usually the HRV has a metal core. ERV has a plastic/ceramic core (unsure of the composition 100%)

  • @networkedperson
    @networkedperson ปีที่แล้ว

    this video's background music isn't loud and annoying enough

  • @toyinorodare4072
    @toyinorodare4072 ปีที่แล้ว

    I want to be your dealer promoting your products in Nigeria markets. Let us work together

  • @fuzzypickle5307
    @fuzzypickle5307 2 ปีที่แล้ว

    Curious about the actual energy usage difference between the two, ive seen other sources go a little more in depth and state that the energy usage is nearly as efficient as a modulating compressor. We have to take into account LRA with the on/off cycle.

  • @mohamadrifai3580
    @mohamadrifai3580 2 ปีที่แล้ว

    I am in Togo Africa and i need to install units but its very large its around 7152 square meter factory, and if i install this type how do i know the temperature inside the factory with 3ACH(air change per hour around 151000cfm) because i think if i change the air more, then i will arrive to more equal temperature with the outside air.

  • @jonwiersig5800
    @jonwiersig5800 2 ปีที่แล้ว

    My swimming pool pump has an energy efficient two speed motor. When operating at the slower half speed, by the affinity laws, the flow drops in half (proportional to the speed change), but the power drop drops by a factor of eight (proportional to the speed change cubed). Why not use a two speed motor on the scroll compressor rather than the unloader?

  • @goetzfrank4090
    @goetzfrank4090 2 ปีที่แล้ว

    Next video please without music. What you think might be uplifting and fun might just be bothering and annoying for the next person. This is about information. Thanks. Good info.

  • @TheOneTrueMaNicXs
    @TheOneTrueMaNicXs 2 ปีที่แล้ว

    Can the units run without exchanging heat? I'm form Texas where we have big temperature changes. Can I for example exchange heat during the day when it 95°F(35°C) and just exchange air not heat when it's night and 60°F(15.5°C)?

    • @aliyehya5521
      @aliyehya5521 3 หลายเดือนก่อน

      By Exchanging air you mean rejecting the exhaust air and have 100% outfoor air, this is called Economy Cycle and it’s part of AHU design using motorized dampers connect to BMS system or HVAC controller. Erv and HRV are strictly for exchanging heat and humidity

  • @jaysheat631
    @jaysheat631 2 ปีที่แล้ว

    I'm an HVAC contractor...this is BS

    • @Burritosarebetterthantacos
      @Burritosarebetterthantacos 2 ปีที่แล้ว

      Id love to know how you arrived at this conclusion.

    • @jaysheat631
      @jaysheat631 2 ปีที่แล้ว

      @@Burritosarebetterthantacos are an HVAC contractor also? I'd definitely love to explain

    • @Burritosarebetterthantacos
      @Burritosarebetterthantacos 2 ปีที่แล้ว

      @@jaysheat631 Shoot. Ive done hvac for almost 20 years.

    • @jaysheat631
      @jaysheat631 2 ปีที่แล้ว

      @@Burritosarebetterthantacos oh so it not a contractor...no sweat, u should still understand what a micron is ...look up what the size of the coronavirus is in micron's and compare that to the filtration of this device

    • @frankly2677
      @frankly2677 2 ปีที่แล้ว

      @@jaysheat631 this unit is built to exchange air not purify it. For that you would need whats called an “air purifier” lmao.

  • @mark33545
    @mark33545 2 ปีที่แล้ว

    what do you use in North east where its very cold but also very humid in the summer?

  • @tjalerkon3680
    @tjalerkon3680 2 ปีที่แล้ว

    I don't know why the heck people play background music in such learning videos!!

  • @chantim02
    @chantim02 2 ปีที่แล้ว

    Lower chilled water supply temperature may result lower chilled water flow rate and lower pump power consumption. However the calculation of energy saving excluded the power consumption of the pump.

  • @johnsakamoto3970
    @johnsakamoto3970 2 ปีที่แล้ว

    Hello I’m Juan

  • @phillichillin1716
    @phillichillin1716 2 ปีที่แล้ว

    Thanks for this, finally getting my head around it

  • @lehatuyentuyen3317
    @lehatuyentuyen3317 2 ปีที่แล้ว

    CovidImages need to be invested more than half19

  • @sam2097
    @sam2097 2 ปีที่แล้ว

    Informative video but the background music is way too loud. Thanks anyway.

  • @Commodore_heavywave
    @Commodore_heavywave 2 ปีที่แล้ว

    Pump down is not recommended.

  • @ItIsGonnaGetWayWorse
    @ItIsGonnaGetWayWorse 2 ปีที่แล้ว

    Random question: There is this random light switch-looking thing in one of my house closets labeled "CRV". Anyone know what its for?

    • @mike02454
      @mike02454 2 ปีที่แล้ว

      Corpse Removal Vehicle. Don't flip that switch with your closet door closed.

  • @asaminguyen4002
    @asaminguyen4002 2 ปีที่แล้ว

    CovidImages need to be invested more than half19

  • @artistuncle3949
    @artistuncle3949 2 ปีที่แล้ว

    Nice msg

  • @beckysmith7517
    @beckysmith7517 3 ปีที่แล้ว

    Hey I have a question? I have a 200 square foot tiny house with closed foam insulation and because I also use it as a greenhouse in the winter time and of course because of transpiration of the plants and evaporation of the soil after a watering… on top of two adult people breathing, I am getting a lot of humidity in the winter time. I also live in the SW Virginia area so we have pretty humid summers here too. Which system would work best for this application and HRV or ERV? I know both clean the air Im just more concerned with excessive humidity. I see a lot of people in tiny houses using HRV but what do you think I should do. Also I am looking for a very small unit… any ideas there because its again only 200 sq ft?

    • @airchange255
      @airchange255 2 ปีที่แล้ว

      Hello, in this case removing indoor humidity during cold conditions should probably be your priority. This is because indoor humidity will condense when coming in contact with cold surfaces (walls and windows etc.). Condensation on surfaces can result in mold growth and building damage. Therefore a HRV will be best for you. It will ensure the humidity that is generated inside gets exhausted outside. Whereas, an ERV will recirculate some of the indoor humidity. We don't deal much with small residential units. But, you'd probably need a unit that does an airflow of approx. 50 CFM

  • @erwinarief4567
    @erwinarief4567 3 ปีที่แล้ว

    inverter scroll compressor video please...

    • @airchange255
      @airchange255 2 ปีที่แล้ว

      Yep, just been busy with other things lately. Will hopefully be able to get the inverter video up in the coming weeks

    • @mattlaporte9999
      @mattlaporte9999 2 ปีที่แล้ว

      Hi, were you ever able to upload the inverter video? This one was so well done, I was hopeful for the Inverter one.

  • @LinNaingYan
    @LinNaingYan 3 ปีที่แล้ว

    My dad was watching ur video and it helps him understand about how this machine works. He has one that not working well cuz of the noise, so he cut it open and see if there’s dirt in it. He clean some dirt and assemble it back. When he close it back and run it again, the machine is not producing pressure anymore. He asked me to ask you if you have any tips and suggestions for it? He has done to other machine by cutting it open, clean the dirt, put it back and it’s running well now. He’s having problem with this one. Thank you.

    • @taiwanluthiers
      @taiwanluthiers ปีที่แล้ว

      I think there's a clearance between the two scrolls required, and they are quite close. Close enough for the scroll to not seize up but not so far that there's no compression. I suspect what happened is you created a leak and now the scroll spins without any pressure difference. Also these compressors are hermetically sealed, and so only way to put it back together is weld it back together. These should be done by remanufacturing facility who can ensure the proper clearance.