A simple internet search and voilà a 1MW heat exchanger just abou 2meters long !
But fortunately Bowman aren't absurd enough to make their heat exchangers out of 6 inch wide piping.
A simple internet search and voilà a 1MW heat exchanger just abou 2meters long !
But fortunately Bowman aren't absurd enough to make their heat exchangers out of 6 inch wide piping.
You are missing the point. I am talking about the HVAC systems, not the people. The HVAC cannot cope with much more than 30 kW. They are not designed for higher power levels. 100 or 200 kW would completely overwhelm them.
A person dancing (to techno or similar) produces 300W heat.
200 gurning ravers can produce around 60kW in a 12x12m area, and that's just a small club... Imagine a 2000 capacity venue... The HVAC works fine.... It has to.
Actually, McK's work is covered by my papers, so you are incorrect as usual.
Didn't McKubre use a mass flow calorimeter?
I actually need to rework the original numbers, not just the expanded list...
Turns out I don't know what 'diatomic gas' means, I thought it meant a mixture of two gases...
Basically, all monatomic gases have a γ of ~1.65, and all diatomic gases (ermm like N2 or O2) have a γ of ~1.4. (It's apparently to do with degrees of freedom... 7/3 vs. 5/3)
So to answer your question, any mixture of noble gases would be monatomic, so would always have the same γ, and hence the same temp. rise would apply.
Adding (diatomic) chlorine to the mix, you would end up with γ somewhere between 1.4 and 1.65, but you would need to know the percentage of Cl2 to calculate it.
People in movie theatres are unlikely to tolerate an extra 10C above the outdoor temperature...
The ridiculous deserve ridicule.
Maybe you should block us both Eric?
Zeus is a never-ending source of comedy.
See here, for instance.
Can you explain this? I think you are wrong because the limitation here is the temperature of the air on exit.
Basically you can't make a counterflow heat exchanger if the pipe is snaking back and forth... which end is the hot end, and which is the cold end?
The diagram at the top of this page may explain this a bit better... only a counterflow HE can approach a 100% temperature match, (ie. 100% efficiency) assuming the parameters are optimised. https://www.quora.com/Why-is-a…allel-flow-heat-exchanger
The air on exit from the heat exchanger must be around 100C
It could be less (I argue 'must be'), but one would have to blow more air over the pipes to balance everything.
Rossi's comment about sunlight on the roof is as usual superficially clever and completely wrong. A roof will get very hot in sunlight even though it is able to radiate and convect into open cold air.
I like to think of it as: If the sun's 1MW heated the roof from 0K to 310ish... What's another 1MW going to do?
At 500kW (which I've been working to, on the grounds that maybe you could manage 500kW dissipated through walls and ceiling of a big warehouse)
Yeah that's approximately the same as I worked it out to be... fag packet style. Probably a bit higher actually... IIRC about 350-450kW unventilated. Although it would need to be noticeably hot inside the building to transmit that much.
Do people really still use imperial units?
Peter is not in on any joke.
He clearly is, seeing as how he has posted underneath some of yours and rogers more ribald conversations, without deleting them.
Your calcs seem reasonable, and it is amusing to see the google hits for "Conductibita".
The air coming out of that window would be very hot, close to 100C
It wouldn't be... Not without a properly designed counterflow HE. With pipes arranged how Rossi describes, that isn't happening.
But that doesn't have any real repercussions on your results, it only reduces the efficiency of the supposed apparatus.
And what is the effect of 58:1 adiabatic compression on xenon? I assume it would raise the temperature enough to push it back into the gas phase?
Cooling the Xenon during compression is done by other lighter noble gases which move heat from the Xenon to the walls of the cylinder.
This cooling method is known and used in selected applications as follows: http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/38/117/38117082.pdf
adiabatic compression equation:
Pf = Pi(Vi / Vf)^γ
rearrange to:
Tf.Vf^(γ-1) = Ti.Vi^(γ-1)
where:
γ= spec. heat capacity / volumetric spec. heat capacity
γ(xenon)=1.65
γ(helium+xenon)=1.4 1.65
Vf=1
Vi=58
Ti=273K
so:
Tf = 273(58^0.65) = 3822K for xenon alone
Tf = 273(58^0.4) = 1385K for xenon with helium
Tf = 273(58^0.65) = 3822K for xenon with helium
Which is a surprisingly large effect from just adding helium... no wonder the turbines in your linked paper prefer mixed gases.
But at that temperature it's on the wrong side of the xenon phase diagram for cavitation to be happening.
And what is the effect of 58:1 adiabatic compression on xenon? I assume it would raise the temperature enough to push it back into the gas phase?
58 bar is a very high compression ratio for an engine, it would have needed a beefy starter motor*... but yes, that phase diagram does imply that cavitation in that setup could be possible...
* edit: assuming the engine has valves and an exhaust cycle... which I imagine it probably doesn't. don't see on that schematic above.
I'm pretty sure Peter in is on the joke... There's plenty of Roger's Ego-out posts that pre-date the eye complaint. Some that you even replied to.
The cavitation theory of the Papp engine provides the reason why fuel preparation is essential.
How does a gas, noble or otherwise, cavitate?
Not to mention when it is for the purpose of mocking a sick, distinguished individual who can not defend against it.
I would argue that you aren't that 'distinguished'... and Roger just has a crush on you. Why not be nicer to him (in public)? We all need a little love in our lives.
Huxley.
1. Where do I accuse Mary of lying? Everyone knows heshe has a notoriously bad memory, more so when it suits hem.
2. If you are going to start holding those whom (you assume) accuse others of lying, to some kind of standard of evidence, why not start with Mary herself? Or are you a hypocrite?
3. It's normal practice for moderators to remove later posts that quote offensive material... otherwise what's the point?
4. If someone deleted a Yugo post, the result would be a huge amount of childish bitching about "censorship" by said poster. None seen any (regarding that post) yet...
Not every deleted post leaves behind a marker. I recently deleted an old post of mine in the 'doggerel' thread, and now there's now zero trace of it.
And your original post doesn't show up in either 'clearance items' or 'the playground', so I doubt that the admins moved it anywhere.
Anyway, it's good to see that you are willing to reaffirm your crime, resetting the 180 day reporting limit for HIPAA violations.
Here's post that quoted your thoughts on Papp: Rossi vs. Darden developments [CASE CLOSED]
If you try to follow the link, you can see it's been deleted.
There's a new Papp thread now... Maybe that's the best place to repeat Papp's diagnosis?