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More spam from the peanut gallery.
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Constant volume compression/expansion-displacer chamber analysis-heat powered mechanical amplifier
Re: Constant volume compression/expansion-displacer chamber analysis-heat powered mechanical amplifier
VincentG, I don't have a problem with your use of the term "echo chamber", I would call it a blog. When someone, such as Daryl Boyd makes a bulletin board and invites people to post, he opens the door for a wide range of personalities. People tend to stay if they are strong willed. That is what happens in life. Yes people get mad go to authorities to punish those they don't like. But a good moderator sees past the little fights and let's them battle it out. The Darwin award forum was very good at that. Typically if one poster went wild, the group policed it with helpful comments. If a person starts a bulletin board and is the sole poster, it is really nothing more than a blog, or as you put it echo chamber. Doubly so if people are banned just because they have a different viewpoint. Especially so if classical science is banned.
There is no agreeing or disagreeing in science. Real science doesn't care what a scientist thinks. There is just understanding the science or not. It is about methodical, logical, mathematical, and , investigation. If you don't understand the science, investigate until you do. Present your findings. Be ready to be corrected.
Back to this thread:
Matt is correct that consent Volume compression is impossible. The equation covering a gas is:
PV =mRT the m being mass, or it can be in moles n.
In that equation, one value is changed, independent, and the others are observed. Compression is the purposeful changing of Volume V. If V is not changed there is no compression.
The example you have given, good thinking, is actually two Volumes, where V-Left + V-Right equals V-Total. V Total is constant. VL and VR are mechanically changed.
To understand your thoughts, left and right volumes must be broken up into even smaller little volumes. The change in temperature, causes mass flow into and out of each little volume. Adding up all the little volumes also equals V-Total.
Each little volume can be thought of as obeying PV=mRT,
where either, V changes, (compression).
Or, V stays constant and m changes, (no compression).
This is the process leading to finite element analysis. The smaller the elements the more accurate the calculation. Elements are constant in one value, (Mass, or Volume). The rest change with temperature changes.
Now getting to what happens with these little elements as the displacer is pumped back and forth is what this thread is thinking about. I foresee some getting colder than Tc and some getting hotter than Th. The ones nearest the walls will stay the temperature of the wall, gaining or giving up heat as needed. If one or both ends are insulated spots on the walls (depending on wall conduction) may become hotter or colder, and everything will tend to all become the ambient outside temperature. Maybe.
Of course if, insulated and pumped fast enough, both sides will become hot from inputted pumping frictional windage energy.
There is no agreeing or disagreeing in science. Real science doesn't care what a scientist thinks. There is just understanding the science or not. It is about methodical, logical, mathematical, and , investigation. If you don't understand the science, investigate until you do. Present your findings. Be ready to be corrected.
Back to this thread:
Matt is correct that consent Volume compression is impossible. The equation covering a gas is:
PV =mRT the m being mass, or it can be in moles n.
In that equation, one value is changed, independent, and the others are observed. Compression is the purposeful changing of Volume V. If V is not changed there is no compression.
The example you have given, good thinking, is actually two Volumes, where V-Left + V-Right equals V-Total. V Total is constant. VL and VR are mechanically changed.
To understand your thoughts, left and right volumes must be broken up into even smaller little volumes. The change in temperature, causes mass flow into and out of each little volume. Adding up all the little volumes also equals V-Total.
Each little volume can be thought of as obeying PV=mRT,
where either, V changes, (compression).
Or, V stays constant and m changes, (no compression).
This is the process leading to finite element analysis. The smaller the elements the more accurate the calculation. Elements are constant in one value, (Mass, or Volume). The rest change with temperature changes.
Now getting to what happens with these little elements as the displacer is pumped back and forth is what this thread is thinking about. I foresee some getting colder than Tc and some getting hotter than Th. The ones nearest the walls will stay the temperature of the wall, gaining or giving up heat as needed. If one or both ends are insulated spots on the walls (depending on wall conduction) may become hotter or colder, and everything will tend to all become the ambient outside temperature. Maybe.
Of course if, insulated and pumped fast enough, both sides will become hot from inputted pumping frictional windage energy.