pressure in bulb will be due to temperature at the outlet of evaporater where bulb sense temperature and refrigerant gas inside of it starts boiling and prressure exerted on diaphragm but here you are taking bulb pressure as summation of spring pressure and evaporater pressure .why?
If the value of Superheat is set too high, then the evaporator is not fully flooded with cold liquid refrigerant causing the evaporator to be inefficient or capacity of evaporator will be reduced, so it will take longer time to bring back the set temperature. If the value of Superheat is set too low, this means that liquid is coming out of the evaporator and back to the compressor and this liquid refrigerant can cause damage to the compressor as it is non compressible and can also effect lubrication of bearing. It can mix with the compressor’s lubricating oil. As the liquid refrigerant comes in contact with the bearing surfaces it will wash away the oil film and cause wearing of the bearings. I will suggest you to watch this playlist again.. ruclips.net/p/PLToh3MS-xY8Y1Mahwbu9-AvMJjwHhElfA ...as answer to your question i have already covered in my videos.
@@meoexams other than operating temp according to me difference is dis but not sure may be other difference would be der ...Electronic version is used in ac unlike reefer plant.equalizing line is present in reefer plant which regulates the flow of refrigerant but in case of ac instead of equalizing line we have temp sensor & pressure transducer which signals the stepper motor which in turn opens the valve accordingly ..
@@meoexams yaa but electronic version is mostly preferred in large systems where large load variation is present bcoz of its precise operation as in case of ac. Reefer plant doesn't face large load variation.. Other difference if u came across let me know .
Well explained. U r doing great. Would u tell me, why constant superheated is required? What would be be problem in case of a bit different in superheat!
I don't even have to listen to the video, your summary says it wrong! First, not all TXV's (the proper abreviation) have equalizing lines, some internally equalize, and the reason is simple... When the system satisfies and shuts down it then must equalize to protect the compressor during start-up, the external or internal equalizing lines merely allow for the pressures to equalize during shutdown to insure the compressor does not start with high pressure already in the discharge line. That's it! It was designed mainly for reciprocating compressors back in the day, scroll compressors do not have the issues with starting under existing pressure differences. Also, your reasoning behind superheat is total bullshit! The job of the expansion valve is to meter/throttle the liquid refrigerant entering the evaporator coil causing a pressure drop to allow for expansion, the way the metering/throttling is controlled is by monitoring and controlling superheat to produce an evaporator tail coil temp of 55 deg on an AC and other design temps for other systems. Sometimes the SH will be higher (up to 20 deg), sometimes lower (around 10) depending on other various situations, the closer to satisfying the thermostat, the higher the SH will go. Most systems regulate SH at between 10 and 14 degs. The equalizing line has NOTHING to do with SH!.
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Very helpful explanation bro❤
How it works in heating cycle when it uses with 4way reversible valve... What should be location of tube
pressure in bulb will be due to temperature at the outlet of evaporater where bulb sense temperature and refrigerant gas inside of it starts boiling and prressure exerted on diaphragm but here you are taking bulb pressure as summation of spring pressure and evaporater pressure .why?
What will happen when the degree of superheat of tev has changed?? And its effect on temp and plant... this is a mmd que... plz ans it....
If the value of Superheat is set too high, then the evaporator is not fully flooded with cold liquid refrigerant causing the evaporator to be inefficient or capacity of evaporator will be reduced, so it will take longer time to bring back the set temperature.
If the value of Superheat is set too low, this means that liquid is coming out of the evaporator and back to the compressor and this liquid refrigerant can cause damage to the compressor as it is non compressible and can also effect lubrication of bearing. It can mix with the compressor’s lubricating oil. As the liquid refrigerant comes in contact with the bearing surfaces it will wash away the oil film and cause wearing of the bearings.
I will suggest you to watch this playlist again.. ruclips.net/p/PLToh3MS-xY8Y1Mahwbu9-AvMJjwHhElfA ...as answer to your question i have already covered in my videos.
@@meoexams thank you sir!!
@meo exams.Why do we add spring pressure for calculating bulb pressure? Please explain
Difference between AC & Reefer TEV ?
Main difference is in their operating temperature...like for AC it has to be in human comfort zone and whereas for refrigerator it can go below zero.
@@meoexams other than operating temp according to me difference is dis but not sure may be other difference would be der ...Electronic version is used in ac unlike reefer plant.equalizing line is present in reefer plant which regulates the flow of refrigerant but in case of ac instead of equalizing line we have temp sensor & pressure transducer which signals the stepper motor which in turn opens the valve accordingly ..
@@rakeshgokhale9643 Electronic version can be used for Ref or AC both...
@@meoexams yaa but electronic version is mostly preferred in large systems where large load variation is present bcoz of its precise operation as in case of ac. Reefer plant doesn't face large load variation..
Other difference if u came across let me know .
@@rakeshgokhale9643 Actually, rarely are the "electronic" TXV's used in residential or AC systems any more due to high failure rate.
Now thats quite informative
Thanks 😊
Bro please solve more questions bro....
Bro. U going great job keep it up don't listen who show down
Thanks brother 🙏
Well explained. U r doing great.
Would u tell me, why constant superheated is required?
What would be be problem in case of a bit different in superheat!
If superheat is high then evaporator efficiency will decrease and if it is very low thn liquid refrigerant might go into the compressor.
Please make more videos on refrigeration
Ok...sure...will try to cover from start to end.
understand the cocept troughly bro. and explain again simply.pls
kia samazao raha ho bhai
I don't even have to listen to the video, your summary says it wrong! First, not all TXV's (the proper abreviation) have equalizing lines, some internally equalize, and the reason is simple... When the system satisfies and shuts down it then must equalize to protect the compressor during start-up, the external or internal equalizing lines merely allow for the pressures to equalize during shutdown to insure the compressor does not start with high pressure already in the discharge line. That's it! It was designed mainly for reciprocating compressors back in the day, scroll compressors do not have the issues with starting under existing pressure differences. Also, your reasoning behind superheat is total bullshit! The job of the expansion valve is to meter/throttle the liquid refrigerant entering the evaporator coil causing a pressure drop to allow for expansion, the way the metering/throttling is controlled is by monitoring and controlling superheat to produce an evaporator tail coil temp of 55 deg on an AC and other design temps for other systems. Sometimes the SH will be higher (up to 20 deg), sometimes lower (around 10) depending on other various situations, the closer to satisfying the thermostat, the higher the SH will go. Most systems regulate SH at between 10 and 14 degs. The equalizing line has NOTHING to do with SH!.
Great...if u think u r correct...well n good 👍👍
ur answer is totally bullshit.......where the hell have you seen superheat at 20 degress?
It will be good if you speak in a language which you know better,,
Will improve slowly...that is y I have started channel..
Kya samjhana chahta h bhai ....bas pad ke bata raha h ....