What do you say? Would you want to be on our show next week? 8 PM central time. We meet 30 mins before to prepare. HVAC OVERTIME on the hvac shop talk channel.
good video and i enjoyed it and learned a lot what is the difference between a condenser fan and Evaporator fan ? and what role do they both play in cooling ?
The condenser fan is usually a propellor type that will not work against static pressure. The evaporator fan is usually a squirrel type to work with ductwork. They are there to move the heat either into the refrigerant or out of it. GFM
They should call the compensator a reheater . So it simply adds heat to the low pressure gas to help it vaporize the liquid or keep the low pressure gas from condensing to a liquid and sumpping back to the compressor also allowing the low pressure gas to absorb more heat and take it back into the house to be used to heat the house . Think of it like a secondary heat exchanger your using heat from the high pressure liquid and puting that heat into the low pressure gas so it not wasted . This allows it to become more efficient at lower temperatures . So the liquid that has released it's heat inside the house and now is coming back outside to the txv . Now there is still heat trapped in that liquid about 80 degrees or so . Now instead of allowing that heat to escape into the air and make the liquid more dance, we take it and push it into the hollow side of the Filling it with that heated liquid . Now the pipe that runs through that liquid is filled with low pressure gas and low pressure gas absorbs heat and now it is absorbing the heat from that liquid helping it absorb heat at lower temperatures it takes that heat from the liquid into the house where it is released into the air and condenses back to a liquid and over and over this process happens but the heat that did not get released into the air is not wasted because it's used at the compensator outside at the evaporator making it more efficient. This is similar to a secondary heat exchanger . And you may say it's to small but remember the refrigerant is moving at feet per second through it where it is constantly absorbing the left over heat from the liquid . I don't know if your seeing it this way or not but when I look at it and think of the physics and the thermal laws of heat this is what I see it doing . Am I wrong grey furnace man ? Or am I correct on my analysis of this device ?
The effect of the compensator may, in fact, do as you say. However this effect is extremely small and the same effect could be accomplished by attaching the liquid line to the suction line as is done in some refrigeration applications. Its primary purpose is to reduce head pressure. GFM
I see it as primarily providing more physical space for the liquid refrigerant, not so much as a heat exchanger. According to GFM under certain conditions less of a charge is needed therefore the excess refrigerant needs a place to reside. He said this is primarily a problem on an unbalanced system. I do see it as warming the suction line to a certain extent before the refrigerant is returned to the compressor thus insuring it is still a gas, and not a liquid. In theory, It only fills up with liquid when evaporative demand is low. That's why I think where it is positioned is important.
More great content! I have no experience with charge compensators, however it seems that if you put the other txv in your drawing (for the indoor coil), it would visually demonstrate that floodback would not be an issue because the refrigerant would be metered before entering the coil. Remember, the refrigerant would pass freely through the outdoor coil (I should have stated earlier that this pertains to the defrost cycle) and meter indoors. My main point was I think it would help having the other txv in the drawing. Does this make sense and add to my understanding, or am I off base?
Ive recently seen the same head pressure problem you decribe on a Rheem RPPL with outdoor TXV and good indoor airflow. It also has a charge compensator. My question is, can these devices go bad?
I see so many time reem/ruud condenser without succion accumulator. my provider gives me an answer that they do not need it .. I told him that in heat mode the compressor could receive liquid in cold weather by a lack of superheat when the coil is frozen and they do not know what answer me.
That has been true of the Rheem units since they started using the scrolls back in the early 1990s. As the scroll will not slug, there is little danger of catastrophic failure. Oil dilution is there but the units do not have a high failure rate. GFM
@@jphvac5725 that's why you call it the out door unit instead; If we are going to use AC terms then we should use AC locations, to avoid miscommunication.
Max R I get what your stating. IMO I think it’s much better to learn the correct terms for coils depending on what they are being used for at that time. Evaporator is outside in hp mode and inside in ac mode. Only speaking of generalizations such as inside or outside coil doesn’t teach what pressures/temps are where and why. But everyone has their way of learning.. He explains evap outside and condenser inside toward end.
Excellent video!
Sir your channel is invaluable. thank you so much.
Welcome
GFM
What do you say? Would you want to be on our show next week? 8 PM central time. We meet 30 mins before to prepare. HVAC OVERTIME on the hvac shop talk channel.
Sorry about the delay. A lot on my plate right now. Will contact you when things settle down.
GFM
@@grayfurnaceman that is great. We would love you have you. You are well respected across UA-cam.
Thanks Grayfurnaceman! Your videos are very helpful.
Welcome
GFM
Thank you sir. I’ve learned so much from you.
Welcome
GFM
Well done sir👏👏👏
Thanks.
GFM
Grayfurnanceman, how do you have more subcooling rather than less? You have a smaller coil and I would think it would move through quicker not slower.
good video and i enjoyed it and learned a lot what is the difference between a condenser fan and Evaporator fan ? and what role do they both play in cooling ?
The condenser fan is usually a propellor type that will not work against static pressure. The evaporator fan is usually a squirrel type to work with ductwork.
They are there to move the heat either into the refrigerant or out of it.
GFM
@@grayfurnaceman thanks for explaining the differences between the two
They should call the compensator a reheater . So it simply adds heat to the low pressure gas to help it vaporize the liquid or keep the low pressure gas from condensing to a liquid and sumpping back to the compressor also allowing the low pressure gas to absorb more heat and take it back into the house to be used to heat the house . Think of it like a secondary heat exchanger your using heat from the high pressure liquid and puting that heat into the low pressure gas so it not wasted . This allows it to become more efficient at lower temperatures . So the liquid that has released it's heat inside the house and now is coming back outside to the txv . Now there is still heat trapped in that liquid about 80 degrees or so . Now instead of allowing that heat to escape into the air and make the liquid more dance, we take it and push it into the hollow side of the
Filling it with that heated liquid . Now the pipe that runs through that liquid is filled with low pressure gas and low pressure gas absorbs heat and now it is absorbing the heat from that liquid helping it absorb heat at lower temperatures it takes that heat from the liquid into the house where it is released into the air and condenses back to a liquid and over and over this process happens but the heat that did not get released into the air is not wasted because it's used at the compensator outside at the evaporator making it more efficient. This is similar to a secondary heat exchanger . And you may say it's to small but remember the refrigerant is moving at feet per second through it where it is constantly absorbing the left over heat from the liquid . I don't know if your seeing it this way or not but when I look at it and think of the physics and the thermal laws of heat this is what I see it doing . Am I wrong grey furnace man ? Or am I correct on my analysis of this device ?
The effect of the compensator may, in fact, do as you say. However this effect is extremely small and the same effect could be accomplished by attaching the liquid line to the suction line as is done in some refrigeration applications.
Its primary purpose is to reduce head pressure.
GFM
I see it as primarily providing more physical space for the liquid refrigerant, not so much as a heat exchanger. According to GFM under certain conditions less of a charge is needed therefore the excess refrigerant needs a place to reside. He said this is primarily a problem on an unbalanced system. I do see it as warming the suction line to a certain extent before the refrigerant is returned to the compressor thus insuring it is still a gas, and not a liquid. In theory, It only fills up with liquid when evaporative demand is low. That's why I think where it is positioned is important.
Great video!! Thanks for posting!!
Welcome
GFM
Heat exchanger.
Not really. If that was its purpose, there are far better ways to move heat.
GFM
Nice informative video....
Interesting concept. I don't understand the TXV on this type of system, as I've never worked on heat pumps.
More great content! I have no experience with charge compensators, however it seems that if you put the other txv in your drawing (for the indoor coil), it would visually demonstrate that floodback would not be an issue because the refrigerant would be metered before entering the coil. Remember, the refrigerant would pass freely through the outdoor coil (I should have stated earlier that this pertains to the defrost cycle) and meter indoors. My main point was I think it would help having the other txv in the drawing. Does this make sense and add to my understanding, or am I off base?
Ive recently seen the same head pressure problem you decribe on a Rheem RPPL with outdoor TXV and good indoor airflow. It also has a charge compensator. My question is, can these devices go bad?
Mine now has a pinhole leak and I can’t find a replacement to save my life
Mine has a pinhole and no one has one and no one knows what they are.
I see so many time reem/ruud condenser without succion accumulator. my provider gives me an answer that they do not need it .. I told him that in heat mode the compressor could receive liquid in cold weather by a lack of superheat when the coil is frozen and they do not know what answer me.
That has been true of the Rheem units since they started using the scrolls back in the early 1990s.
As the scroll will not slug, there is little danger of catastrophic failure. Oil dilution is there but the units do not have a high failure rate.
GFM
I'm confused.
Why would you say that the evaporator is cold on a heat pump in heat mode🤔.
He means the outdoor coil.
Because the evaporator is then outside and condenser inside in hp mode.
@@jphvac5725 that's why you call it the out door unit instead;
If we are going to use AC terms then we should use AC locations, to avoid miscommunication.
Max R I get what your stating. IMO I think it’s much better to learn the correct terms for coils depending on what they are being used for at that time. Evaporator is outside in hp mode and inside in ac mode. Only speaking of generalizations such as inside or outside coil doesn’t teach what pressures/temps are where and why. But everyone has their way of learning.. He explains evap outside and condenser inside toward end.
then how in the goat do they run 125% on ice melt
this is WAC
and I get passed and fired for listening to juice with ear buds