5:33 - It’s ok. I knew what you meant! Some people say _eXpecially_ instead of especially and _nucUlar_ instead of nuclear at times, too. As long as the concept you want to communicate is understood, you’re good! Thanks for being willing to share your experience and knowledge with us.
Superheat means to me a condition in which a fluid has been heated to such a temperature under such a pressure as to make the vaporous state and liquid state of that fluid equal in weight. Is refrigerant increased to such a density after being pushed by the compressor? If so, how is that measured? How would a system have superheat in the low pressure side when the refrigerant is being suctioned, not pressurized?
Dude you are amazing. We built a custom 15 ton air-cooled chiller to go into a salt mine in Northern Canada. Ambient temperature in the mine will be about 115F they raised the load temperature from 80F to 105F I'm running a Bitzer scroll with 407c. My discharge pressure is 440 PSI my discharge line temperature is 225F my suction superheat is about 50F. My TXV is backed all the way out. I could handle the high ambient but the increase in high load is overwhelming my brazeplate evaporator. To top it off my condenser had to be sprayed with heresite and have a nylon screen over it. The compressor is so hot you can hardly hold your hand on the bottom side of it. I feel like the TXV is too small for this increase in load. This is the first I've heard of discharge superheat. Will definitely be getting that number in the morning. I wish we could just go to standard EEV valves. We're just having a hard time incorporating our Schneider plc with the Schnieder EEV driver. I have been pushing for engineering to oversized the EEV a little bit so that I don't starve the evaporator under these high load conditions. They seem to want to size the eev for set point or a low load situation. But then I am 100% open on the EEV but still starving my evaporator at high load. I feel like this EEV stepper motor would still be accurate at low load even if the valve was only say 12% open.
You could set it up with liquid injection for cooling the compressor a bit at peak loads because at those numbers your compressor won't last. If you'd like deeper support I have a Chiller Community where i offer troubleshooting support to those enrolled in an Academy course. chilleracademy.com
@@HVACTIME yeah I'm definitely going to enroll. Yeah the customer and our engineers want it to work, but the numbers don't lie. Compressor death for sure. I hate when they ask me what I think and I have to give them the bad news. I said do you want me to be optimistic or do you want me to be honest.
