Awesome... I am an Industrial Supervising Electrician. We work on all Electrical and Control for these systems, while also doing Everything else that is Industrial Electrical. Loved this Video !
First day doing industrial refrigeration. Worked on an ammonia chiller and this video just simplified all the shit that I saw today. I bled out the oil into a bucket and got a good whiff of that good ole ammonia. Smells like death.!
Thanks eng. Mindset....this video helps me lot about my work......be proceed more video on this topic in detail to solve problem in industrial refrigeration.
This is fantastic, i love the smooth animation and easy explanations. I just found this channel and if your other videos are as good as this one ill be sticking around for a long time. Thank you so much for these awesome videos. P.s. Shouldnt there be a regulating valve on the cascade condenser?
This is an excellent explainer video of the Industrial Refrigeration System. Thoroughly appreciate your efforts to share this knowledge with us industry folks!! :)
Could you do a video on how purge units work for ammonia systems? Specifically the kind which condense using the suction vapour line and not a seperate refrigeration system.
Would you consider tackling the absorption ammonia refrigeration system? I realize these are small scale but your delivery is so great, it would make my day:)
I see u on facebook commenting about a post of screw compressor and then search it on yotube then i saw u again heehhe are you a mechanical engineer? Btw i am a 2nd year mechanical enginnering student. Take care always!!
Ive been on a few of these projects in Aus. as a pipe welder. Its great to learn more about them as im normally hyper focused on my scope of works on site.
I'm currently taking my power engineering level 5 and this is super helpful for understanding when you are just learning. The videos they have with the course are so boring/terrible/old. I'm so glad I found these
The regulator valve and expansion valve are almost the same , the only difference is the expansion valve has much better and consistent adjustment for the very much important amount of liquid ammonia going into the evaporator . The regulator valve controls the pressure differential between the condenser and receiver . the head pressure runs around 125 an 150lbs , an the receiver runs at 75lbs pressure differentials are key , as that's how the system works. I was a manager of several companies with ammonia refrigeration systems .
slight error... the cascade condenser is the evaporator of the high temp circuit and the condenser of the low temp circuit. At 8:00 you said it backwards.
Great explanation... I have an alternate method to this that is way more efficient than a cascade. We have hit -112c with a single stage system and can get much lower. Patent Pending!
Awesome presentation ! . I found this while searching for Amonia system issues as I am having prolong issue in my Ammonia compressor . Grateful if you could support me to solve it. We have a two stage ammonia compressor connected to Blast freezer of -40 C . At start it perform well and while room temperature down to -30 C Compressor oil pressure reduces gradually below to the set point ( 1,5 bar) and shuts down . All the components were checked , replaced ( bearing , pump , filters , oil etc ) . nothing didn't solve the issue. But one day in a test run suddenly , the machine picked up the oil pressure and run as normal. It continuously ran for two weeks without problem and all of a sudden again the same issue occurred . Now we are helpless . If anybody can support us, it is very much appreciated. !!
NH3 systems require a T-machinary room classification. Without proper emergency pressure release systems, diffusion and fire suppression the risk of a toxic explosion is too high and therefore only certified techs can make physical changes to the system and certified RO/PE's can operate it. If you want to experiment with refrigeration, I'd recommend using something inert and learn about corrosion, piping codes first. I have personally rigged a commercial AC to the side of my house and use the heat in my greenhouse. It can take litres of water out of the air and cool my entire place below 60 degrees. The waste heat can become it's own project. If this field interests you there's extremely good jobs in heavy industry. I'd say it is less of a career because you will always be training and working on new systems unless you find a chief plant operations position but eventually you'll want a bigger system to operate as you gain more firing time and experiance.
@@JohnSmith-xk8rr Do You have it rigged as a reversible heat pump, or did you just place a condenser in the greenhouse? There are some circumstances where you may need to cool a greenhouse too. Is the air conditioner new or an old unit removed from a residential home? What refrigerant does it use?
One key factor that was forgotten is that ammonia is highly corrosive to anything containing water, including your skin. Copper also can’t be used on ammonia systems at all
Do you have an ammonia refrigeration example similar to the "Design a refrigeration system" video with example calcs? Not sure how to deal with the liquid/vapor mixture coming out of the evaporator. Thanks. These are all great videos!
The expansion valve and the regulating valve you have backwards ! The expansion valve goes in between the evap and ammonia pump . And normally a single stage system doesn't use ammonia pumps , they run off the receiver pressure . the regulator valve belongs in between the condensor and receiver to put a diff of head pressure of around 150lbs to 75lbs receiver pressure.
they can and do have pumps. you're thinking of a single stage system with control pressure receiver and dump tanks, which have no pumps but instead rely on a set pressure of ammonia sitting in a vessel to be fed into a tank and then pushed by hot gas to the evaps.
Hello engineering mindsets team I have a question regarding the industrial video with ammonia as refrigerant. In the video it is shown that cascade intercooler or heat exchanger is used to maximize the refrigerating effect. How I can use the same in 60TR block ice ammonia ice plant where we produce the ice for marine products so that I can increase the refrigeration cycle more efficient and decrease the time of production.
Dear sir nice video . But i want to know when calculate the effencity of refrigeration cycle we divide out put by input . And we consider only workdone by the compressor and not consider work done by condensor fan as we are paying charges to operate electrical energy
2:12 You're forgetting that when Anhydrous ammonia reacts with water, it generates heat. At certain storage densities, this is bad… you get a runaway reaction which leads to a massive explosion. This is what happened in Beirut.
Ammonium nitrate, NH₄NO₃, solid, fertilizer, was Beirut. This vid is about Anhydrous ammonia, NH3, a gas, that can also be sprayed into the soil as a fertilizer and also used as a refrigerant.
Questions: 1. What material is used to contain the ammonia? 2. How do you keep the ammonia dry? 3. Why do you use isenthalpic expansion instead of isentropic expansion which should be more efficient, at least, in principle? 4. What kind of seals are used on the compressors to keep the ammonia from contact with the motors?
1. You can contain ammonia in tanks, while pressurized. 2. The only way the ammonia get wet is if there is a leak and air gets in, this happens in cases in which you are working in vacuum. To vent out the air, you use an air purger. 3. For this you need to understand the refrigeration cycle with a pressure vs enthalpy chart. In a sense, you need to keep the enthalpy in the same level after it passes through the condenser. 4. The motor is connected to the compressor through the shaft. The compressor would have a shaft seal to keep the ammonia within the compressor. There are videos on how a shaft seal works. Hope it helps!
@@juansalazar4325 Clarification: You wrote: "You can contain ammonia in tanks" What material are the tanks made of? "You need to keep the enthalpy in the same level after it passes through the condenser." Why?
@@DavidFMayerPhD Ammonia is contained in steel. Steel is adequate and inexpensive. Never use copper or copper alloy such as brass or bronze - ammonia will corrode them very rapidly. Isentropic expansion is difficult. A machine is needed to extract work. The fluid is a gas/liquid mixture so a controlled expansion is even more difficult. And the efficiency loss from the isenthalpic expansion is small because the amount of expansion is small, most of the expansion is due to isothermal evaporation. So even though isentropic expansion is best in theory, practical limits favor isenthalpic expansion.
1. stainless steel and black iron pipe 2. using purgers and to take out non condensable as well as getting anhydrous ammonia when you first fill up. 3. i dont know tbh 4. its a carbon and material that sits on the shaft of the compressor. called the shaft seal that prevents push back. it usually sits in oil to prevent any leakage and they get replaced every so often depending on the wear they get. usually there isnt any direct contact what so ever with the motors unless theres a huge problem.
Question, you mention at the end in a cascade system that it sometimes uses 2 different refrigerants, allowing you to use less ammonia. But you said a couple times in the video the refrigerants never make cntact with air or water ad always sealed. That makes this a closed loop system and the refrigerants shouldnt be consumed no?
Hello sir, i would like to clarify and ask. The equalizing line's purpose is to equalize the pressure between the compressor outlet/condenser inlet with the ammonia receiver to allow the liquid refrigerant flow towards outside the condenser outlet more easily. Then, if there were no equalizing line existing between those two points, would there be an overflow, followed by back flow? Then the equalizing line's another purpose is to prevent the liquid refrigerant flowing back inside the condenser. Please correct me if I am wrong sir, thank you very much.
Thanks for making it easy to understand. Been working on an NH3 plant Ref for 11 years . NH3 as our primary & H20 / Glycol as secondary Ref . Thank you
Don't need the liquid separator either . This system is set up wrong with equipment it doesn't even need ! I have built a few engine rooms in my time. I worked with a guy who trained me and we called him the ammonia God ! lol Really smart man .
This is a simplified version of a system, to understand the basic operation through animation. It is not an actual system. The system components are typical.
Amonia is the best, the cheaper, can reach as the temp required, one thing is not good it is toxic or poisonous and hazardous element but useful in some otherway..
The compressors main role is to move refrigerant around the system, the reason it's high is because of the heat absorbed in the evaporator (look at pressure temperature relationship) and the additional heat from compressing that gas (heat of compression - that is what moves the gas but has a by-product of heat) combined, this results in the pressure becoming high if that makes sense
the accumulator just holds liquid and gets pushed out by the discharge pressure of the EQ line. A separator has liquid that has been pushed through from the accumulator and then it is sucked on by a compressor from the top. liquid stays at the bottom and the vapors get pulled through by the suction.
What's the point of the intermediate pressure refrigerant line plunging in the liquid in the intermediate cooler compared to having it meet the outlet of the intermediate cooler on a T then go to the high stage compressor suction? Pressure equalization and better desuperheating of the discharge gas of the low stage compressor?
Denuris Turgryn In my personal experience, the low stage compressors discharged vapor at around 30 psig and about 120 degrees f. If you piped that superheated vapor straight into the suction of a high stage compressor, it would not take very long for that compressor to shut down on high discharge temperature. Even mixing with cold vapor from the intermediate vessel will not help much in desuperheating, because that cold vapor has already done its job. Once evaporated, ammonia’s ability to absorb more heat is practically nothing. Remember that the maximum transfer of heat is latent or hidden and occurs during a change of state. The intermediate cooler, in theory, brings the low stage discharge vapor temperature back down to its saturation temperature. The flash gas created, when superheated low stage discharge vapor makes contact with lower temperature liquid ammonia, removes a tremendous amount of heat. The high stage compressor then compresses it again up to around 150-180 psig and about 120 degrees f. These numbers are from a system that used liquid injection cooling for its compressors. Hope that helped.
hey brother i have some issue with electricity regarding to High Med Low working condition. could you help me with this? as high pressure consumes more electricity and I dont know how to calculate cost thus I dont understand with "working condition" means
Can you please expound on the need for a "pressure equalization" pipe that connects the high pressure vapour pipe to the receiver? What is the need for that line and what happens if it's not there?
Basically when you are pouring fluid down a tube into a tank the vapor on the tank takes up space that is being displaced by the liquid that's coming in. The vapor tube allows that vapor to go somewhere and also allows it to be further cooled.
Also, unequal pressure makes the condenser less effective. If the system has to use a pressure difference to push liquid from condenser to receiver, then the condenser will be partly full of liquid, and liquid has much less heat available to remove compared to vapor. With a pressure equalization line, vapor can flow up from receiver to condenser, allowing liquid to flow down from condenser to receiver. That keeps the condenser liquid level low.
@@robertrocheville7769 would it be fair to say it allows the receiver to fill up with liquid by purging out the "air pocket" trapped in the receiver vessel
Hi there! After operating, my compressor oil is mixed with ammonia and water, do you know how to separate the ammonia and water from the compressor oil?
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Thank you
what is the condensing temperature of co2 and evaporating temperature of ammonia in the cascade condenser?
Why some systems has Ammonia pump and some systems don't?
1:45
I've been in the business for 22 years and this is by far the best e learning I have ever seen. Thank you keep up the good work.
Hey
I can get some help from u since u doing for 22 years
How much dose a technician makes in industrial refrigeration?
@@abazism basic salary in my country
I need your help, I want to be an AC technician. Do you want to help me
You will definitely be rewarded by God for this...as you are helping a lot there for free...Love you man
Awesome... I am an Industrial Supervising Electrician. We work on all Electrical and Control for these systems, while also doing Everything else that is Industrial Electrical. Loved this Video !
These have got to be the best laid out videos and explanations available. Thank you
How to read *CHILLED WATER SCHEMATICS* here ➡️ ruclips.net/video/ak51DHAiuWo/видео.html
I had been in the business for 37years and i like this e-learning, Thank you keep up the great works.
First day doing industrial refrigeration. Worked on an ammonia chiller and this video just simplified all the shit that I saw today.
I bled out the oil into a bucket and got a good whiff of that good ole ammonia. Smells like death.!
I always found it hard to understand cascade systems but this helped me understand it finally! Thank you
Thanks eng. Mindset....this video helps me lot about my work......be proceed more video on this topic in detail to solve problem in industrial refrigeration.
This is fantastic, i love the smooth animation and easy explanations. I just found this channel and if your other videos are as good as this one ill be sticking around for a long time. Thank you so much for these awesome videos.
P.s. Shouldnt there be a regulating valve on the cascade condenser?
Agree, very well done and clear animation. I also will be watching a lot more. Thanks!
This is an excellent explainer video of the Industrial Refrigeration System. Thoroughly appreciate your efforts to share this knowledge with us industry folks!! :)
Very well explained. Thank you
Could you do a video on how purge units work for ammonia systems? Specifically the kind which condense using the suction vapour line and not a seperate refrigeration system.
search how auto purger will work you will find
Would you consider tackling the absorption ammonia refrigeration system? I realize these are small scale but your delivery is so great, it would make my day:)
I see u on facebook commenting about a post of screw compressor and then search it on yotube then i saw u again heehhe are you a mechanical engineer? Btw i am a 2nd year mechanical enginnering student. Take care always!!
Good video, keep it up my man
Thank you
Ive been on a few of these projects in Aus. as a pipe welder. Its great to learn more about them as im normally hyper focused on my scope of works on site.
What metal was the pipe made out of?
I'm currently taking my power engineering level 5 and this is super helpful for understanding when you are just learning. The videos they have with the course are so boring/terrible/old. I'm so glad I found these
Very good video, doesnt get no better than that for simplicity.
Just started hvac this was extremely helpful
The regulator valve and expansion valve are almost the same , the only difference is the expansion valve has much better and consistent adjustment for the very much important amount of liquid ammonia going into the evaporator . The regulator valve controls the pressure differential between the condenser and receiver . the head pressure runs around 125 an 150lbs , an the receiver runs at 75lbs pressure differentials are key , as that's how the system works. I was a manager of several companies with ammonia refrigeration systems .
Yes great, Pressure difference is the key
What will happen if there's a high pressure differential
slight error... the cascade condenser is the evaporator of the high temp circuit and the condenser of the low temp circuit.
At 8:00 you said it backwards.
Hello, can i message you I would like to know how Ice plant works I'm planning to assemble on my own thank you hope you notice me.
Good point! I was going to point that out too.
Great explanation...
I have an alternate method to this that is way more efficient than a cascade. We have hit -112c with a single stage system and can get much lower. Patent Pending!
Is the system you have and are referring to an altra-low freezer?
@@ryanm7249 it can be used as an ultra-low freezer yes. We see it having a multitude of uses across many industries.
Do you produce these systems yet?
@@dan4age We have been in production since 2020 with multiple working models currently in operation.
What is it?
thank you for the video, I'm new to ammonia refrigeration and found this help full we have
Ammonia refrigeration is my final year projects topic ..✌️
Good video, thanks engineering mindset team
7:59 Cascade condenser, Acts as a condenser for the LOW temperature circuit, and an evaporator for the HIGH temperature circuit. Yes?
Yes
Yes, correct. He stated it backwards in the vid
Excellent ...just made it so simple
Thank you sooooooo much ❤️ this video saved my life
Awesome presentation ! . I found this while searching for Amonia system issues as I am having prolong issue in my Ammonia compressor . Grateful if you could support me to solve it.
We have a two stage ammonia compressor connected to Blast freezer of -40 C . At start it perform well and while room temperature down to -30 C Compressor oil pressure reduces gradually below to the set point ( 1,5 bar) and shuts down . All the components were checked , replaced ( bearing , pump , filters , oil etc ) . nothing didn't solve the issue. But one day in a test run suddenly , the machine picked up the oil pressure and run as normal. It continuously ran for two weeks without problem and all of a sudden again the same issue occurred . Now we are helpless . If anybody can support us, it is very much appreciated. !!
How did it go? Please tell us
@@LC-qi5ff guess he never fixed it...
you always have the best tech videos
Great video to refresh yourself from time to time.
thank you for this vid. im gathering ideas for LIQUID AMMONIA :) keep it up!
NH3 systems require a T-machinary room classification. Without proper emergency pressure release systems, diffusion and fire suppression the risk of a toxic explosion is too high and therefore only certified techs can make physical changes to the system and certified RO/PE's can operate it.
If you want to experiment with refrigeration, I'd recommend using something inert and learn about corrosion, piping codes first.
I have personally rigged a commercial AC to the side of my house and use the heat in my greenhouse. It can take litres of water out of the air and cool my entire place below 60 degrees.
The waste heat can become it's own project. If this field interests you there's extremely good jobs in heavy industry. I'd say it is less of a career because you will always be training and working on new systems unless you find a chief plant operations position but eventually you'll want a bigger system to operate as you gain more firing time and experiance.
@@JohnSmith-xk8rr
Do You have it rigged as a reversible heat pump, or did you just place a condenser in the greenhouse? There are some circumstances where you may need to cool a greenhouse too. Is the air conditioner new or an old unit removed from a residential home? What refrigerant does it use?
I love basically anything industrial :P industrial style stuff looks so good :P
Beyond awesome, Cheers!!
One key factor that was forgotten is that ammonia is highly corrosive to anything containing water, including your skin. Copper also can’t be used on ammonia systems at all
How about galvanized steel?
@@bigkirbyhj666 i dont know anyone that uses galvanized pipe. however using stainless or just black iron is fine.
Ammonia absorbs water so it dehydrates your skin.
Can't use galvanize steel, silver,gold, copper n brass
But I have heard it is used in volatile pH control of water system for corrosion prevention
Do you have an ammonia refrigeration example similar to the "Design a refrigeration system" video with example calcs? Not sure how to deal with the liquid/vapor mixture coming out of the evaporator. Thanks. These are all great videos!
man....u are a saviour...
great video, Sir what are the factor to be considered for a water chiller design and how to select compressor and condenser for those design
Love the videos keep em coming
Greatly done 🙏🌹
Excellent , as usual.
The expansion valve and the regulating valve you have backwards ! The expansion valve goes in between the evap and ammonia pump . And normally a single stage system doesn't use ammonia pumps , they run off the receiver pressure . the regulator valve belongs in between the condensor and receiver to put a diff of head pressure of around 150lbs to 75lbs receiver pressure.
Thanks for clearing that up, I was going to ask the same question. If they're going to make informational videos they need to get the facts straight.
they can and do have pumps. you're thinking of a single stage system with control pressure receiver and dump tanks, which have no pumps but instead rely on a set pressure of ammonia sitting in a vessel to be fed into a tank and then pushed by hot gas to the evaps.
Good work, i will share video on my channel about industrial refrigeration system that are currently installed in our factory.
So informative thanks
What is the purpose of the EQ pipe in an ammonia refrigeration system?
Great video!
Thanks for the vid.really useful and informing.
Great videos very educational and appreciated
Hello engineering mindsets team I have a question regarding the industrial video with ammonia as refrigerant. In the video it is shown that cascade intercooler or heat exchanger is used to maximize the refrigerating effect. How I can use the same in 60TR block ice ammonia ice plant where we produce the ice for marine products so that I can increase the refrigeration cycle more efficient and decrease the time of production.
Always great. Upload a detailed video please.
8:53. How can increasing the pressure of the receiver help liquid flow more easily from the condenser to the receiver?
because the increase pressure pushes the ammonia trough
Dear sir nice video .
But i want to know when calculate the effencity of refrigeration cycle we divide out put by input . And we consider only workdone by the compressor and not consider work done by condensor fan as we are paying charges to operate electrical energy
Great 👍
2:12 You're forgetting that when Anhydrous ammonia reacts with water, it generates heat. At certain storage densities, this is bad… you get a runaway reaction which leads to a massive explosion. This is what happened in Beirut.
Ammonium nitrate, NH₄NO₃, solid, fertilizer, was Beirut. This vid is about Anhydrous ammonia, NH3, a gas, that can also be sprayed into the soil as a fertilizer and also used as a refrigerant.
Questions:
1. What material is used to contain the ammonia?
2. How do you keep the ammonia dry?
3. Why do you use isenthalpic expansion instead of isentropic expansion which should be more efficient, at least, in principle?
4. What kind of seals are used on the compressors to keep the ammonia from contact with the motors?
1. You can contain ammonia in tanks, while pressurized.
2. The only way the ammonia get wet is if there is a leak and air gets in, this happens in cases in which you are working in vacuum. To vent out the air, you use an air purger.
3. For this you need to understand the refrigeration cycle with a pressure vs enthalpy chart. In a sense, you need to keep the enthalpy in the same level after it passes through the condenser.
4. The motor is connected to the compressor through the shaft. The compressor would have a shaft seal to keep the ammonia within the compressor. There are videos on how a shaft seal works.
Hope it helps!
@@juansalazar4325 Clarification: You wrote:
"You can contain ammonia in tanks" What material are the tanks made of?
"You need to keep the enthalpy in the same level after it passes through the condenser."
Why?
@@DavidFMayerPhD Ammonia is contained in steel. Steel is adequate and inexpensive. Never use copper or copper alloy such as brass or bronze - ammonia will corrode them very rapidly.
Isentropic expansion is difficult. A machine is needed to extract work. The fluid is a gas/liquid mixture so a controlled expansion is even more difficult. And the efficiency loss from the isenthalpic expansion is small because the amount of expansion is small, most of the expansion is due to isothermal evaporation. So even though isentropic expansion is best in theory, practical limits favor isenthalpic expansion.
1. stainless steel and black iron pipe
2. using purgers and to take out non condensable as well as getting anhydrous ammonia when you first fill up.
3. i dont know tbh
4. its a carbon and material that sits on the shaft of the compressor. called the shaft seal that prevents push back. it usually sits in oil to prevent any leakage and they get replaced every so often depending on the wear they get. usually there isnt any direct contact what so ever with the motors unless theres a huge problem.
Thanks a lot for sharing this contect in the way you does. Great to have a channel wi +2M Suscribers and sharing knowledge as it should be.
Outstanding!
Question, you mention at the end in a cascade system that it sometimes uses 2 different refrigerants, allowing you to use less ammonia. But you said a couple times in the video the refrigerants never make cntact with air or water ad always sealed. That makes this a closed loop system and the refrigerants shouldnt be consumed no?
Thanks for the information..👍
i like the engineering mindset and thank you god bless
Thanks for video
Good explanation..!!
Hello sir, i would like to clarify and ask. The equalizing line's purpose is to equalize the pressure between the compressor outlet/condenser inlet with the ammonia receiver to allow the liquid refrigerant flow towards outside the condenser outlet more easily. Then, if there were no equalizing line existing between those two points, would there be an overflow, followed by back flow? Then the equalizing line's another purpose is to prevent the liquid refrigerant flowing back inside the condenser. Please correct me if I am wrong sir, thank you very much.
Superb channel
I remember ammonia refrigerators in the kitchen powered by a small gas flame
I’ve always called the compressor the heart of the system. Should have been an engineer.
Thanks for making it easy to understand. Been working on an NH3 plant Ref for 11 years . NH3 as our primary & H20 / Glycol as secondary Ref . Thank you
Can u share more about the pressure equaliser pls
Love it!
Please explain intercooler working process with animation
Can LH2 be used in the exact saame way? If not how dan it work? Thx
Thanks sir very good video nice 🇵🇰
Hy do you have video how ultra low refrigerator work im from Indonesia
I was on an ammonia hazmat team. We did have a leak that I discovered in the beef fabrication department while working food safety.
god bless you sir! god bless
Sub titles are hindering the illustrations, modify it,or keep margin for it ...rest best technical e learning forum, keep it up
Subtitles aren't fixed, you can turn them on and off or move them on screen
this is very good
fantastic
Can you do a video on the old propane fridges
Good job! Subscription!
Don't need the liquid separator either . This system is set up wrong with equipment it doesn't even need ! I have built a few engine rooms in my time. I worked with a guy who trained me and we called him the ammonia God ! lol Really smart man .
This is a simplified version of a system, to understand the basic operation through animation. It is not an actual system. The system components are typical.
BUT, CAN i have a portable "cooling" unit that generates enough power from the heat to charge my devices.???
The liquid separator tank, is this thermal insulated? Please reply. Thank you
yes it is. Everything after the expansion valve coming after the receiver is insulated.
Amonia is the best, the cheaper, can reach as the temp required, one thing is not good it is toxic or poisonous and hazardous element but useful in some otherway..
What is the difference between the compressor rotating 3000 rpm/min? And 1500 rpm/min?
Anything on dissecant dehumidifiers??
@1:17 wow, all ammonia plants really do look the same
Why is it necessary to bring the pressure up to cool the refrigerant (through the compressor)?
The compressors main role is to move refrigerant around the system, the reason it's high is because of the heat absorbed in the evaporator (look at pressure temperature relationship) and the additional heat from compressing that gas (heat of compression - that is what moves the gas but has a by-product of heat) combined, this results in the pressure becoming high if that makes sense
So the intercooler is calling for the liquid from the HPR?
what's the difference between a liquid separator and liquid accumulator?
the accumulator just holds liquid and gets pushed out by the discharge pressure of the EQ line. A separator has liquid that has been pushed through from the accumulator and then it is sucked on by a compressor from the top.
liquid stays at the bottom and the vapors get pulled through by the suction.
sino nandito dahil sa ammonia leak sa Navotas?
👇
What's the point of the intermediate pressure refrigerant line plunging in the liquid in the intermediate cooler compared to having it meet the outlet of the intermediate cooler on a T then go to the high stage compressor suction?
Pressure equalization and better desuperheating of the discharge gas of the low stage compressor?
Denuris Turgryn In my personal experience, the low stage compressors discharged vapor at around 30 psig and about 120 degrees f. If you piped that superheated vapor straight into the suction of a high stage compressor, it would not take very long for that compressor to shut down on high discharge temperature. Even mixing with cold vapor from the intermediate vessel will not help much in desuperheating, because that cold vapor has already done its job. Once evaporated, ammonia’s ability to absorb more heat is practically nothing. Remember that the maximum transfer of heat is latent or hidden and occurs during a change of state. The intermediate cooler, in theory, brings the low stage discharge vapor temperature back down to its saturation temperature. The flash gas created, when superheated low stage discharge vapor makes contact with lower temperature liquid ammonia, removes a tremendous amount of heat. The high stage compressor then compresses it again up to around 150-180 psig and about 120 degrees f. These numbers are from a system that used liquid injection cooling for its compressors. Hope that helped.
Thanks
Please where can I get practical training on INDUSTRIAL REFRIGERATION please help me out.
hey brother i have some issue with electricity regarding to High Med Low working condition. could you help me with this? as high pressure consumes more electricity and I dont know how to calculate cost thus I dont understand with "working condition" means
Can you please expound on the need for a "pressure equalization" pipe that connects the high pressure vapour pipe to the receiver? What is the need for that line and what happens if it's not there?
Basically when you are pouring fluid down a tube into a tank the vapor on the tank takes up space that is being displaced by the liquid that's coming in. The vapor tube allows that vapor to go somewhere and also allows it to be further cooled.
Also, unequal pressure makes the condenser less effective. If the system has to use a pressure difference to push liquid from condenser to receiver, then the condenser will be partly full of liquid, and liquid has much less heat available to remove compared to vapor.
With a pressure equalization line, vapor can flow up from receiver to condenser, allowing liquid to flow down from condenser to receiver. That keeps the condenser liquid level low.
@@robertrocheville7769 would it be fair to say it allows the receiver to fill up with liquid by purging out the "air pocket" trapped in the receiver vessel
@@jimbojones806 Sounds very fair to me.
Not rocket science but still Pretty cool 😎
Hi there! After operating, my compressor oil is mixed with ammonia and water, do you know how to separate the ammonia and water from the compressor oil?
Hello I am from Bangladesh, I had a question
Get Rid of the all water completely in your system, make sure it's absolutely dry and then add new oil, old oil can not be used
what about the power consumption compared to vapor compression cooling ???