HVAC Chiller Approach Explained
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- čas přidán 14. 07. 2021
- This hvac training videos goal is to teach hvac technician on how chiller approach works and what to do with it. I give an indepth look at condenser approach and evaporator approach. This online chiller training is great for entry level chiller tech looking to expand their knowledge. This applies to water cooled chiller and air cooled chiller. This can also help with centrifugal chiller surge. Chiller surging is commonly a heat exchanger issue.
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Best commercial hvac channel on youtube
Thank you
Im from the UK and I don't see thses very often so thankyou for the video.
A SOLID MOMENT IN HISTORY KEEP UP THE GOOD WORK.
Great video and commentary on the reasons we pay attention to approach. Particularly found useful your commentary on adjusting water flow rates and the impacts of these adjustments
Best chiller channel ever
Thank you
Great video once again!
Fantastic explanation as usual. Keep up the great work!
Excellent description of approach. When I was an apprentice, a journeyman tried to tell me the delta T between incoming and leaving water was the approach. I spent a couple years believing that, lol!
That happens a lot more than it should.
I am having Chief, Assistant Chief's, and Leads tell me it's called "being inverted".
Nice video.
Great knowledge.
Thanks for sharing
Great video as always
Excellent info! Great video! Thank you!
Thank you for helping me understand chillers.
Liking your videos btw,wish we had this 30 yrs ago.
Another great great video
I really like that u r trying to get young guys interested in large tonnage machines. Im the youngest chiller mechanic that we have and im 40. Our vets are retiring this year
It takes several years of hands on experience to effectively PM a LTC. As for service and troubleshooting that will require even longer period under the watchful eye a qualified technician.
Great explanation.
Very good information.
Great video,thanks 👍
Best explain .❤
Really good explanation
Thank-you sir.
Great video 💯💯💯💯💯💯
Nice explanation sir
so gret learning chillers fanda thank s sir
can i just say thank you I just got the building engineer position and I came from hvac background and I have enough knowledge to be able to get by but I never got to diagnosing the big boy stuff. I hate when I look up explanations and its a video of a tonka truck dropping off and picking up hot/cold water its like dude i want to know exactly what's going on in that tank so i can understand!!!
Good content brother 🤠
Thank you
Mmmm sweet knowledge
One of the tools a chiller plant engineer or operator should always have is a ( PT CHART) pressure and temperature chart. Another tool needed is the pressure drop chart needed to determine flow rate on each chiller barrel. Now a days they have a ultrasonic flow meters on your bldg automated system
Approach also tells us how efficient the heat exchanger transfers heat. If the tubes in the water cooled condenser are dirty your approach temperatures will go up and vice versa. Punching the tubes is a good idea, and keeping tower water clean and filtered
A very informative and detailed video. Can you recommend a textbook for chiller maintenance and repairing? Thanks
Can you recommend any good chiller classes given by manufacturers to help us build a chillers division?
Hi , I have 3 "Carrier 5H80" compressors in tandem configuration , besides the oil equalizers on hand hole lower connection , there is also piping on the same hand hole on upper hole which are connected to all 3 compressors , do you know what is it for ?
Very good video. I’d like to add that the reason the approach goes up when the water flow is too low is because the water will go into laminar flow (as opposed to turbulent flow). Laminar flow is when the flow is so low that the water flows down the center of the tubes and is stationary on the tube edge where the heat transfer is taking place. Think of a small stream with very low flow. You’ll see the water and leaves flowing down the center and the water is stagnant on the sides. Turbulent flow has all the water mixing up going through the tubes. In a chiller, when you approach laminar flow, you loose you’re approach very quickly.
I agree, this has been a very challenging topic of discussion on this channel overtime.
You mean for a Flooded Type Condenser Barrel, right?
. The closer these temperatures are to each other, the more efficient the heat transfer.
I think I was referring to the Approach temperature
Is that bottom on the hybrid the subcooler? Is there a subcooler on the flooded barrel?
Thank you for this video.
Please do mention the unit of Temperature you are working with either °F or °C
Good point, I was using °F
Can you list acceptable ranges for each type of approach in fahrenheit please?
Condenser approach
Evaporator approach
Cooling tower approach
Thank you 🙏🏼
What’s the best approach value on a 80 ton CGAM for the evap EX? I was running 7 degrees the other day. Just getting into chillers recently and your videos have inspired me to take this path.
A typical range is between 3F to 10F
You briefly mentioned WSHP with co-ax coils. Just curious what information can be gleaned from condenser approach on those systems? My first thought would be that a higher approach would mean that coil was likely starting to get fouled, what would you consider a normal approach on such a system?
The approach will be higher, typically around 10F
Need more details wanted
I know 0° approach is ideal. But that also depends on the design. Some chillers are designed for a 2° approach. So if u r running 0° you r running the chiller outside of the design of the chiller.
Trane centrifugal is 2°
I have a question, is the chiller the condenser? I'm asking because my teacher was calling it an evaporator but he may have misspoken and I don't want the wrong idea in my head :(
A chiller will have an evaporator and a condenser. The condenser can be water cooled or air cooled
I notice these are large scale water medium devices. Would these designs be viable in residential scenarios?
No, wouldn't be efficient enough. And requires more advanced service ability and cost. Some of the original residential system used chilled water but the industry quickly moved away from it.
In residential it's more important to look at superheat, subcool, delta t, and static pressures. I have the measure quick app for ease of getting all these in one place and reporting that information at the end of the job. It will throw you off if you look at condenser approach often it's negative which is a sign of liquid line restriction but there's no measurable difference from the condenser outlet and entering the expansion valve.
@@HVACTIME " Some of the original residential system used chilled water but the industry quickly moved away from it. "
- And now green measures are making residential go back to it 😆😆😆😆
Hello Buddy, we appreciate your clips on the Centrifugal Chillers; Do you have any clips on adjusting the metering valve on the MqQuay / Daikin Centrifugal Chillers. As it seem though you adjust the pilot valve, the main valve, seems to be very lazy in responding, any advice?
I have a 500/ton McQuay Centrifugal Chiller @ 4160 Volts, where the Discharge Superheat is suppose to be 15-18 *F with the liquid injection off @ 100% however, im just getting carryover which is preventing the oil from returning to the Oil sump to maintain the Oil level required. Discharge superheat is falling to 1*F
What the causes if the approach temp of evaporator is negative sensors are New
What machine is this on?
Approach temperature? In essence the
Chiller approach is the temperature difference between the water and the refrigerant.
Are you familiar with Smart air cooled chiller?
I am their water cooled but not air cooled.
When you talk about Approach as far as a chiller system you should be very specific because each component has his approach there are Different types of Approach:
1. Condenser Approach Temperature
2. Evaporator Approach temperature
3. Cooling tower Approach
4. AHU Approach Temperature
I specified chiller approach
Deez
Try to be more accurate direct and concise about your chiller tutorials, when you use lot of rhetoric it sounds a though you don't know what you're talking about
U was speaking like u was asleep. So 👎. I m sorry but its real.