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@michaelpatrick69504 жыл бұрын
IGVs impart a pressure drop in the refrigerant loop lowering its density. The compressor is a volumetric device so now each unit volume of refrigerant has less mass. The evaporator is a mass device so there is less mass flow from the restricted inlet thus less capacity. The IGVs also pre-swirl the refrigerant thus keeping the compressor on its curve. The compressor generates constant compression ratio at constant speed so the outlet pressure is proportionally lower due to lower inlet pressure. Capacity has nothing to do with refrigerant angle of incidence but stability does. A simple butterfly valve could be used but they impart too much turbulence at low opening and don’t give the range of IGVs because of their flow characteristics.
@altamimi20086 жыл бұрын
I see at the end of the video, you've used kind of chiller simulation program, may I know the name or link of this program please?
@hvac2157 Жыл бұрын
Guide vane opening depands on which factor.... Mean our load... Suppose our chilled water is ²5 degree celsius but guide vane is opening Only 20% how we increase it.... By making other parameters i favour of it
@holmanyusedciprianoliveros89357 жыл бұрын
What happens if the day is cold, from the controller can I raise the cold generation range, other than 6 ° C but 12 ° C? This directly affects the flow of refrigerant that will allow the passage to the expansion valve by means of the thermal valve that is in the suction line towards the compressor, is it correct? How can I calculate how much coolant is required to cool a degree of temperature.
@bhampresson7 жыл бұрын
Great job on this video! really needed this to understand more!
@AKK1053 ай бұрын
A very informative and detailed video. Thank you for sharing. Can you recommend a textbook for chiller maintenance and repairing?
@abdulahadsm771010 ай бұрын
Hi, Paul this is Abdul ahad from Pakistan . I am working on a Johnson control Yz centrifugal chiller. Watching your videos and I want to say that you have done an excellent work. Thanks alot. Help me clear the concept please. When Vane guide control the flow of refrigerant by throwing a refrigerant to an angle it decrease the kinetic energy, so does it also means the refrigerant entering to condenser though discharge line has low temp due to this?
@jakeking87484 жыл бұрын
How does the vane control work in tandem with the expansion valve? The expansion valve can also be allowed to open only as much as required, right?
@movax20h4 жыл бұрын
Usually they will work independent. If due to more cooling demand the motor and impeler are spinning faster, or vanes are opened by control system, the expansion valve (be it hydraulic or electric) will open or close to maintain the proper suction line temperature, so it will follow indirectly the control, but usually will not be operated directly. Some more advanced systems will operate electronic expansions valves in tandem, and also be able to diagnose issues, if their position is not what is expected.
@amjadtt84107 жыл бұрын
Thank you for your outstanding explanation it was useful indeed I'm making service to one of this type of chillers
@masterchef66947 жыл бұрын
thanks a lot. finally I understood what capacity modulation is. very informative thanks.
@masterchef66947 жыл бұрын
on what parameter does the guide vanes operate? evaporator refrigerant pressure or leaving chilled water temperature?
@EngineeringMindset7 жыл бұрын
Typically it will operate from the water temperature
@มนตรีกุสลากรกุล4 ай бұрын
My screw chiller 100 ton but cooling load only 35 ton can i unload screw chiller to 50% and reduce flow rate of chilled and condenser water
@sadanscraft6617 жыл бұрын
Thankc for the support....could you please tell me what is the use of induction Moter installed with the compressor unit????
@EngineeringMindset7 жыл бұрын
Hey Devid, the motor rotates the impeller in the compressor, this moves the refrigerant around the system. We will do a video soon on the motor, but for now you can see inside a motor and the compressor in this video kzbin.info/www/bejne/hoWThnyndqyUmck
@treelife36526 күн бұрын
Thanks for the detailed look 😊
@khansokha40974 ай бұрын
Bigger thinks for your VDO...!
@gaoqifen2 жыл бұрын
How about VSD centrifugal compressor? In that case do they also have guide vane? And which is a priority to control? VSD speed or vane opening?
@EngineeringMindset2 жыл бұрын
Please watch our turbocor chiller video
@MrSabram077 жыл бұрын
outstanding, very easy to understand, thanks
@str8kronic Жыл бұрын
Isn't this very similar to an expansion valve ? Would this drop the pressure as well? Even though the vapor should already be at a low pressure coming from the evap? Why can't we use an expansion valve for capacity control?
@Saqibkhan-om8en2 жыл бұрын
Very knowledgeable Sir plz share one clip about high compressor lift alarm in centrifugal compression system.
@kavehsalimian7 жыл бұрын
Great videos man, thanks
@arjunbirdi7539 Жыл бұрын
It actually founded useful even but I know the 3D dimension of the compressor to draw, labels and creativity because it's founded difficult to understand about the name of the labels and demonstrations for my work experiences.
@arjunbirdi7539 Жыл бұрын
How to do this about the experiment?
@yokeleetan85253 жыл бұрын
the video should not be describing chill and condensor water layout. instead it should combine vane guide and hot gas bypass. also show compressor surge graph and when hot gas bypass is required.
@hvinceac92117 жыл бұрын
Great job! thank you for the lesson.
@MC-yx2gn3 жыл бұрын
Just curious as to why the induction motor housing would be insulated. Wouldn’t you want to bleed off as much heat from that motor as possible? Thanks
@danielmurray2960 Жыл бұрын
Really love the content ❤. I’m wondering what qualifications do you need to become a chiller tech
@mostafam9420 Жыл бұрын
Guide vane or Inlet guide vane
@chamilanawaratne66295 жыл бұрын
Many thanks for sharing your knowledge with us. In here your talking about centrifugal compressor , so in screw type compressor what is the capacity control method?
@jessicaxinshijiamachinery25934 ай бұрын
Very professional video, thank you for sharing
@crisantovazquezalmeida18514 жыл бұрын
amazing, you explain everything so good. thanks
@ياسرالعقيل-ل8ح3 жыл бұрын
Thank you for this video, clear and informative.
@danielbartolome88072 жыл бұрын
Thanks for sharing this video very helpful
@IceyJunior5 жыл бұрын
what do you meant by max A of motor to protect it ?
@EngineeringMindset5 жыл бұрын
motors are rated for a certain amount of current, if they exceed this they will become too hot and melt their insulation so they are rated and usually have a thermal cut out which cuts power if it reaches too hot or too much current flow
@masterchef66947 жыл бұрын
could you tell me what information I am I supposed to understand from the rated load apms?
@EngineeringMindset7 жыл бұрын
RLA is the rated load amps, the maximum your chiller should pull. The run load amps should be less than this and will vary with the cooling load of the chiller.
@aircooledtx7 жыл бұрын
Rated load amps is the amount of current measured when device is running,Full load amps is Max that the device can pull, if amps pass that mark and no adjustment can be made, then device needs to be tested to insure it will continue to produce design performance.
@masterchef66947 жыл бұрын
thanks
@krishnaprasanth56794 жыл бұрын
Pls explain capacity control of screw chillers
@ae60102 жыл бұрын
Keep going please
@jfasjfas7 жыл бұрын
i see , thank for the info, so vsd similar to inverter, vane guard to vrf
@EngineeringMindset4 жыл бұрын
VFD Video is now live! here: kzbin.info/www/bejne/r3azlmqIedmendE
@EngineeringMindset2 жыл бұрын
New VRF unit video here:➡️ kzbin.info/www/bejne/apqUiZqZhZano9k
@dimasaja397 жыл бұрын
Thanks for the video...I REALLY DO APPRECIATE IT.. am still waiting for the next another video form this chanel...I HOPE it would be all about the wiring diagram which is controlling the system in its sequences,thank you so much.
@EngineeringMindset7 жыл бұрын
Hi Dimas, it;s coming soon don't worry. Glad to hear you enjoy the videos and they are helping you.
@generalb.m.s152 жыл бұрын
Many thanks to you mate, that was great..
@lucasbelosantos75017 жыл бұрын
I thought the cooling capacity was controlled by the expansion valve, as you explained in a previous video. Does it a work in a combination of the expansion valve and the compressor?
@EngineeringMindset6 жыл бұрын
For centrifugal chillers yes. You might like this new video on expansion valves kzbin.info/www/bejne/pYSvgHt5hNxmr8k
@carlosduran53567 жыл бұрын
Hey thanks for this great videos. Question aren this temperature sensors usually located in a well or they need to be in direct contact with the water, refrigerant or oil?
@EngineeringMindset7 жыл бұрын
Hey Jaylenne. Refrigerant sensors tend to sit on the pipe wall externally with insulation around them, water sensors will sit inside the pipe in a well but you will come across externally mounted ones.
@ractech40185 жыл бұрын
What compresser efficiency
@RajeshYadav-be7ds4 жыл бұрын
Thanks a great
@actionwoman24772 жыл бұрын
superrrr
@Chemoholic_Z2 жыл бұрын
Thank you
@ae60102 жыл бұрын
Great ❤️❤️❤️
@imhotep16137 жыл бұрын
I think you should have mentioned that the hot gas leaves first of all the compressor heads up to the cooling tower (your red color line at 32c) cools down them come back as subcooled into the evaporator then leaves the evaporator heading to the AHU ....
@EngineeringMindset7 жыл бұрын
This type of chiller doesn't send refrigerant to the cooling tower or AHU. The refrigerant always stays in the chiller, only the condenser water goes to the cooling tower, and only the chilled water goes to the AHU's. The condenser water is completely separate from the chilled water. Only the refrigerant moves around the inside of the chiller between the two circuits.
@imhotep16137 жыл бұрын
The Engineering Mindset ok. So that means the refrigerant ( head pressure) from the compressor goes into the Condenser then from the Condenser it condenses to finally send the liquid to the cooling tower then comes back at at lower temp. into the Condenser. From now it'll leave the Condenser once again to go into the evaporator then the evaporator will send out chilled water to the AHU . Am I right .loll
@EngineeringMindset7 жыл бұрын
Almost but not quite. So the refrigerant gas condenses into a liquid in the "condenser" of the chiller, it then moves to the expansion valve and then into the evaporator before getting sucked back into the compressor and pushed into the condenser again to repeat the process. The refrigerant (gas or liquid) remains completely separated from the water which flows in the condenser water loop or the chilled water loop. Have a watch of the other videos on chillers before moving onto these more advanced ones. Make notes and sketches along the way to help you understand it. Chiller basics part 1 - kzbin.info/www/bejne/ZqPdgpuJjbukbJI Chiller basics part 2 - kzbin.info/www/bejne/aYvTdmaseM-Bp68 Compressor - kzbin.info/www/bejne/hoWThnyndqyUmck Evaporator - kzbin.info/www/bejne/jWTaaHmmjZ6db80
@imhotep16137 жыл бұрын
The Engineering Mindset thank you. Am gonna watch them. It seems like I was getting confused between the chillers system and the refrigeration system
@pravdomirdobrev48506 жыл бұрын
Very well explained! Your videos are very good quality. Keep the good work going.