Computer Room Air Conditioning - How do CRAC units work?
Vložit
- čas přidán 11. 10. 2022
- How do computer room air conditioners work, in this video we learn how CRAC units work for server room air conditioning
🎁 FREE Refrigerant charts
Link:➡️ theengineeringmindset.com/ref...
Get this book ➡️ hvacr.life/Industrial-Refriger...
Get this book ➡️ hvacr.life/Best-HVACR-Book
⚡🛠️ TOOLS YOU NEED 🛠️⚡
**************************************
Get this HVACR book ➡️ amzn.to/3XFCaKC
Professional Multimeter -➡️ amzn.to/3xu2Vaw
Good multimeter -➡️ amzn.to/3xrbuTd
Professional clamp meter ➡️ amzn.to/4140FnK
Good Clamp meter ➡️ amzn.to/3xqt2is
Outlet tester ➡️- amzn.to/3kavg2l
Energy monitoring plug ➡️ amzn.to/3SkfPl7
Battery tester -➡️ amzn.to/3S3fHWI
Basic electronics kit ➡️ amzn.to/3xuLiqS
MY FAVOURITE GEAR
🎥 My camera - amzn.to/3YCZ7Q9
🎤 My Microphone - amzn.to/3YYXsUC
⌨️ My Keyboard - amzn.to/3lBsl33
🖥️ My monitor - amzn.to/415BGjW
🎧 My headphones - amzn.to/3lN7R7u
WATCH THESE
Electronic expansion valve:➡️ • Electronic Expansion V...
EEV:➡️ • How EEV works - Electr...
Temperature sensors:➡️ • Temperature Sensors Ex...
Solenoid valves:➡️ • How Solenoid Valves Wo...
Heat pumps:➡️ • Heat Pumps Explained -...
Air handling units:➡️ • How Air Handling Units...
👋 SOCIALISE WITH US 👋
*******************************
👉FACEBOOK: / theengineeringmindset
👉TWITTER: / theengmindset
👉INSTAGRAM: / engineeringmindset
👉WEBSITE: Http://TheEngineeringMindset.com
👀 Links - MUST WATCH!! 👀
*******************************
⚡ELECTRICAL ENGINEERING⚡
👉How electricity works: • How ELECTRICITY works ...
👉Three Phase Electricity: • How Three Phase Electr...
👉How Inverters work: • How Inverters Work - W...
👉How TRANSFORMER works: • How does a Transformer...
👉How 3 Phase electricity works: • How Three Phase Electr...
👉How Induction motor works: • How does an Induction ...
👉What is a KWH: • What is a kWh - kilowa...
👉How induction motor works: • How does an Induction ...
❄️ CHILLER ENGINEERING ❄️
👉Chiller Efficiency improvements: • Chiller Efficiency Imp...
👉Chilled water schematics: • Chilled Water Schemati...
👉Chiller crash course: • Essential Chiller Term...
👉Chiller types: • Chiller Types and Appl...
👉Chillers/AHU/RTU: • How Chiller, AHU, RTU ...
👉Water cooled chiller Part1: • Chiller Basics - How t...
👉Chiller cooling capacity calcs: • CALCULATE Chiller cool...
👉Chiller compressors: • 🔧 Chiller - Compressor...
👉Chiller expansion valve: • Chiller - Expansion Va...
👉Chiller surge: • Chiller - Surge
👉Chiller condenser: • 🔧Chillers - Condensers
👉Chiller evaporator: • 🔧Chiller - Evaporators
👉Chiller compressor centrifugal: • Centrifugal Compressor...
👉Chiller cooling capacity: • Chiller - Cooling Capa...
🌡️ HVAC ENGINEERING 🌡️
👉HVAC Basics: • Fundamentals of HVAC -...
👉Boilers/AHU/FCU: • How a boiler, fan coil...
👉How Heat Pump works: • How A Heat Pump Works ...
👉Heat pumps advanced: • How A Heat Pump Works ...
👉Fan Coil Units: • Fan Coil Unit - FCU HVAC
👉VAV Systems: • Variable Air Volume - ...
👉CAV Systems: • Constant Air Volume - ...
👉VRF Units: • Video
👉Cooling load calculations: • Cooling Load Calculati...
👉Pulley belt calculations: • Pulley Belt CALCULATIO...
👉Pump calculations: • Pump CALCULATIONS, Flo...
👉Fan and motor calculations: • Fan & motor CALCULATIO...
👉HVAC Cooling coils: • HVAC - Cooling coil + ...
👉Cooling towers: • How Cooling Towers Work
⚗️ REFRIGERATION SYSTEMS 🌡️
👉How refrigerants work: • Refrigerants How they ...
👉Thermal expansion valves: • How TXV works - Thermo...
👉Refrigeration design software: • Refrigeration Design S...
👉Design refrigeration system: • How to DESIGN and ANAL...
👉Reversing valve: • Reversing valve - Heat...
👉How A/C units work: • Basic Refrigeration cy...
⚗️ REFRIGERANTS ⚗️
👉Refrierant retrofit guide: • Refrigerant Retrofit G...
👉Refrigerant types, future: • Refrigerant Types, Iss...
👉How refrigerants work: • Refrigerants How they ...
🌊 HYDRONICS 🌊
👉Primary & Secondary system: • HVAC Primary & seconda...
👉Pumps: • Centrifugal Pump How D...
👉Pump calculations: • Pump CALCULATIONS, Flo...
🔥➡️❄️ HEAT EXCHANGERS 🔥➡️❄️
👉Plate Heat Exchangers: • Plate Heat Exchanger, ...
👉Micro plate heat exchanger: • Micro Plate Heat Excha...
💻 DATA CENTERS 💻
👉Data Center cooling: • Data Center HVAC - Coo...
🔬 PHYSICS 🔬
👉What is Density: • What is Density? - Den...
🎬 DOCUMENTARY 🎬
👉WW2 Bunker HVAC engineering: • Engineering a Top Secr... precision air conditioning server room air conditioning server room air conditioner data center hvac cold aisle containment hot ailse containment hot aisle containment hot and cold aisle
*These videos take a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕
PayPal: www.paypal.me/TheEngineerinMindset
Channel membership: czcams.com/channels/k0fGHsCEzGig-rSzkfCjMw.htmljoin
Patreon: www.patreon.com/theengineeringmindset
sir please explain about 6.6kv vcb panel which run ht motor
Me too
I watch as i sit next to the CRAC unit… learning its secrets 👀😂
It’s not a secret. It’s a cycle. Lol
I was just given a project on CRAC units lol. Now I have a better understanding of their purpose. Thanks!!
CRAC units also like normal building ducted air systems, interface with building systems like VESTA, so in event of fire they shutdown, this is essential since if the suppression system fires, its agents are not being extracted, allowing it to do its job and extinguish flame and preventing reignition
Great video! In the data center engineering industry we reserve “CRAC” designations for units with a direct expansion inside the CRAC and closed loop refrigerant such as R-410 is the only heat transfer media. This is similar to a mini split air conditioner or other AC unit.
If the heat transfer media is chilled water, the industry term is “CRAH” or Computer Room Air Handler.
Your content is top notch as always and I sometimes send new engineers your videos. Keep up the great work!
Everything base on this designs are CRACs here. never heard of CRAH. feels odd given the units all look identical.
Another remake right? As always....extremely informative!!
Very interesting how these systems function. I do like the cover on top to force the hot air up and over to the CRAC unit.
Our CRAC units have the compressors inside the units along with a water cooled condenser. Then the water pipes go outside to coolers. They also have a refrigerant coil and water coil, so In the colder months it uses water chilled by the outside air
Just chillling out ❄❄
Thank you I learnt a lot from your Channel
That's the proper and sensible way to do it, but I have seen so many companies just use standard ceiling mounted air conditioning units.
If it's only a small server room then it makes little sense to spend 3 or 4x as much on a CRAC unit instead.
During my childhood I saw this thing in NCERT books and now I am happy to learn it . This is my pleasure to find such channel contain awesome videoes and also better sound effect then other...
😍😍😍 Thanks man for this
Ya
Great info regarding this video 👍
Q? 😇, do crack system had a cooling capacity ( BTU or tons ) like chiller & home ac air-conditioning.
Thanks 😊 and good luck 👍
Have you made a video of making electrical schematics. Like how your choosing wire numbers locations of devices in a panel and how you would find it. I think that would help alot of people.
Edit from a European DC Provider - normally with indirect cooling... the hot water from the CRAC units is cooled in towers for normal cooling and then additional cold water from the Chiller is added if needed (if outside temp is ober $°c)
fascinating!
suspended floor? I think you mean "raised" floor :)
Your last method is close to the best, cold room but its better to send exhaust into plenum from each rack via boot systems, where its extracted in part, and recycled in another part, in such systems it is also code in many countries to inject external "fresh" air into the mix, rather than just recycling the same hot air over and over, but all in all a good explanation
Great! 👍
QUESTION: We have several Liebert crac units with water cooled condensers. Currently we use approx 70deg water flowing through the condensers. However, we need to know if we used 55 degree water would it drastically effect the units efficiency. There is a condenser water control valve in each unit. I ask because there are no parameters recommended in the owners manual. Any help here would be greatly appreciated.
Great
Funnily enough, I'm installing CRAC units this week in a hospital - but not for server rack cooling, they're being used for CT Imager cooling. Also, they're configured to supply conditioned air out the top and draw return air through the bottom.
Interested to know what is the temperature difference between supply and return air. Hot air rise to the top, so it will be inefficient to supply cold air on top and draw back from bottom.
just chilling out
Just Chilling Out
used to help design off-site data storage centres when i worked in london. doesn't look like it has changed much over the years.
Cool
Just chilling out
Instead of a floating floor design, I wonder if this could be used as a geothermal system and just do away with all the cooling system components?
It’s also worth noting that every CRAC unit is going to contain some form of active humidification.
60 % +/- 5 in this neck of the woods
Not always in the units, we use seperate steam humidifiers. But I guess there is more than one way to skin a cat.
I'm A UPS trchnician. CRAC units are unsung heroes lmao
Does Air coolded Crac unit also called Crah unit ? Please clarify I'm confused lol
I’ve built data centers in my career….. this is spot on.
6:50 hot air containment : Does Hot air containment have to be larger than the cool room containment?
Why compressor are placed inside indoor unit instead of outdoor
That second "CRAC" unit you describe is a CRAH... no?
Yo
I’m “just chilling out”
I made first comment after creator
Did someone say crack?
Ah, that's just where we've always hidden our dark web crack, that was the OG name for it.
Have you ever done a video on Preconditioned air units?