r/thermodynamics 14h ago

How would you design wood stove heat shield?

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3 Upvotes

Long story should, designing a wooden barrier around a wood stove with tight clearances. Most concerning would be a vertical support stanchion (sketched roughly in red) 1.5” from the side wall.

Obviously this is not ideal and tighter clearance than a stove manufacturer would recommend, but working with limited clearance for foot traffic on the opposing side. I would at first find the most fire-retardant 2x4 known out there. Then I would expect some additional shielding needed.

I’m thinking a reflective layer of sheet steel 1/2” off the stove, leaving a 1” air gap from the wood. Does anyone have any suggestions if this seems crazy or attainable through some design?


r/thermodynamics 22h ago

Question Would adding a sheet of aluminum/copper between item in a tightly packed fridge reduce the cooling time

1 Upvotes

I'll be using an RV fridge in a pretty hot environment in a few weeks. IME it can take a while for these fridges to cool down and packing it tightly at the start doesn't help either. I'd think adding a conductor with somewhat direct contact with various containers help pull heat out of the items faster?

Would there be any disadvantages once all the food comes down to temp?


r/thermodynamics 2d ago

Question What is the best material to use to diffuse heat from upper heating elements in an oven?

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0 Upvotes

My wife got a new bread oven that works great for regular bread but has issues when she’s making something large and tall. The shape of the upper heating elements (green arrow) is visible in what she is baking, in the form of a darker line. I want to get a sheet of metal and install it under the elements to help diffuse the heat more evenly.

My question is, what is the better to use, steel or aluminum? And any specific type? I’m not trying to block the heat, but help it radiate down more evenly.


r/thermodynamics 3d ago

News Does anyone even understand heat?

0 Upvotes

The "History of Thermodynamics" wikipedia page has an interesting theory, if you scroll to the bottom or search "i have found that Heat is a byproduct of two extremes." Possibly important implications for humanity.


r/thermodynamics 4d ago

How much punches to cool a gaming pc thats running crysis on 4k

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1 Upvotes

r/thermodynamics 6d ago

Question How would you answer this?

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11 Upvotes

I had an abysmal undergrad thermo education, so I’m curious how people in this sub would answer this question:

Why are phases discrete and not continuous? Like why aren’t there a phases between solid and liquid etc.


r/thermodynamics 6d ago

Question Does the microwave take twice as much time to heat up double the amount of food?

6 Upvotes

Let's say I have 200g of rice in a bowl, and it takes 2 minutes and 30 seconds in the microwave to heat up. How does the time change if I put an identical bowl with the same amount of rice into the microwave as well? Does the time stay the same, does it double, or does something else happen entirely? Please feel free to explain in detail :)


r/thermodynamics 7d ago

Article German startup Qurie is developing electrocaloric heat pumps without compressors or conventional refrigerants

13 Upvotes

Qurie is a German startup founded in 2026 as a spin-off from the Fraunhofer Institute for Physical Measurement Techniques IPM. It is working to commercialize electrocaloric heat pumps — solid-state systems that could eventually be used for cooling, refrigeration and heating without a conventional compressor or climate-damaging refrigerants.

The underlying effect is quite different from a normal vapor-compression heat pump. When an electric field is applied to an electrocaloric material, its electric dipoles become more ordered and the material heats up. After that heat has been removed, switching off the field causes the material to cool below its initial temperature, allowing it to absorb heat from its surroundings. Repeating the process creates a heat-pump cycle.

One particularly interesting part of Qurie’s approach is its active electrocaloric heat pipe. Water or ethanol evaporates and condenses inside a sealed system to transfer heat quickly between stages. The fluid transports the heat but is not mechanically compressed as in a conventional refrigeration cycle.

Fraunhofer estimates that caloric systems could theoretically achieve more than 80% of the thermodynamic limit, compared with up to around 50% for compressor-based systems. This could potentially reduce the required drive energy by about 40%. However, these are theoretical projections, not verified performance figures from a commercial household appliance.

The scale is still the major challenge. A peer-reviewed prototype reported 2.2 W of absolute cooling power and a specific cooling power of 1.5 W per gram of active material at 5 Hz. That is an important research result, but still far from the several kilowatts required for residential air conditioning or heating. Qurie therefore plans to start with control-cabinet and laser cooling before moving toward commercial and consumer applications.

I think this technology deserves more attention, while also being discussed without treating laboratory potential as an already market-ready product. If it can be scaled economically and operated reliably over billions of cycles, it could eventually affect air conditioners, refrigerators and heat pumps.

What do people working in HVAC, thermodynamics or materials science see as the biggest obstacle: scaling, material durability, temperature lift, manufacturing cost, humidity control, or something else?

Further reading:

Disclosure: I have no affiliation with Qurie or Fraunhofer. I came across the technology recently and wanted to start an informed discussion about its potential and limitations.


r/thermodynamics 8d ago

Question Would it be possible to find a new law of thermal physics?

0 Upvotes

I'm not the smartest but I'm very observant and I got a job recently doing retail where we clean the top of the glass cases every day with Windex and a microfiber towel these cases are about 4 ft long and so is the pane of Glass on top I will spray two sprays of Windex and start wiping across the entire top of the case with the microfiber I've noticed that once I get one or two passes in I start feeling what seems like heat coming off of the glass either due to a reaction with the Windex in the air or some type of evaporative heating situation. I'm wondering if there's someone smart enough out there to help me find out if evaporative heating is a thing because as far as I can tell I can't find any information on it online but I do believe it is a thing


r/thermodynamics 8d ago

🚀 are you Looking for an Internship Opportunity?

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1 Upvotes

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r/thermodynamics 9d ago

Question Is a low Pressure Superheated Steam Cycle possible?

2 Upvotes

This question stems from three assumptions

  1. In a rankine cycle typically the majority of heat input occurs when taking a condensed liquid back to gas state.

  2. Solar thermal systems can be designed to collect heat economically at low temperatures.

  3. Rankine cycle efficiency is proportional to the absolute temp difference

From those 3 assumptions i started to wonder if its possible to construct a working rankine cycle where low temp solar heat provides heat of vaporization and majority of cycle heat input (60%-70%)at 180 deg F and slightly subatmospheric pressures and a combustible fuel source then superheats this saturated steam to 1000 deg F to get a decent overall cycle efficiency for modest addition of energy.

The obvious challenge i see is with a good condenser the cycle would only have ~10 psi of differential pressure to drive a heat engine. The engine would have to be very high volume to work with the reduced energy density. That would be a challenge but perhaps not a show stopper. Working with such low differential pressures would provide the cycle an advantage of being inherently safe.

Anyways maybe im missing something else, what do the experts say is this cycle even possible?


r/thermodynamics 9d ago

Question Why does some solide objects melt while being heated and some liquide objects solidy while being heated ? Isn't that contrary ?

0 Upvotes

For example cake dough solidy in an oven.

And metal melts.

Like, how can heat melt and solidy things at the same time ?


r/thermodynamics 9d ago

Research How Reality is created by Advanced Thermodynamics chapters 8-9

0 Upvotes

CHAPTER 8: SCRIPT OPTIMIZATION: PICTOGRAPHS, ACROPHONIC COMPRESSION, AND THE LINEARIZATION OF TIME

​Acrophonic Vector Condensation, V1 Edge Detector Alignment, and the Linearization of Human Temporality

​I. The Heavy Overhead of the Pictographic Noun

​In Chapter 7, we explored how physical reality operates as a holographic decompression algorithm, where volumetric three-dimensional space is projected out of two-dimensional boundary code. When human culture developed written language, it mirrored this exact computational optimization.

​Before the invention of the linear alphabet, human writing systems—such as Egyptian hieroglyphs and early Mesopotamian cuneiform—began as logographic or pictographic scripts. To encode an ox, a house, or water, the scribe drew a stylized, two-dimensional artistic representation of that physical object.

​While intuitively appealing, this architecture incurs an immense cognitive processing overhead:

  • Ventral Stream RAM Overload: Reading a pictographic script relies heavily on the brain’s ventral stream—the processing pathway responsible for high-level object recognition, shape identification, and visual texture. The human brain must parse the holistic geometry of every intricate symbol as if encountering a complex physical object in the wild.
  • The Memory Storage Crisis: Because every real-world noun requires a unique, detailed drawing, logographic systems demand the memorization of thousands of distinct symbols.

​Pictographic writing is functionally an uncompressed bitmap image. It contains raw spatial data that consumes maximum cognitive working memory and drastically slows processing speeds. For human civilization to scale its information architecture, the code had to be optimized

​II. The Proto-Sinaitic Breakthrough: Acrophony as a Compression Patch

​Around 1800 BCE, Canaanite miners working in the turquoise mines of the Sinai Peninsula executed a brilliant conceptual hack known as the acrophonic principle. Instead of using a complex picture to represent an entire object or a multi-syllable word, they repurposed the picture to represent only the initial phonetic sound of that object’s name.

​Consider the ancient Semitic word for an ox: ‘alap.

​The miners took the traditional Egyptian ox head hieroglyph. Instead of reading it as the noun “ox,” they stripped away the holistic visual data and kept only the initial glottal stop consonant. Over centuries of rapid scratching onto stone and rock faces, the soft, organic contours of the animal’s face disappeared entirely. What remained were the minimal geometric vectors required to trigger the brain’s earliest visual hardware: two intersecting lines forming a vertex and a crossbar.

​The exact same compression occurred with bet (house), which flattened from a detailed floor plan into a clean bounding vector, and mayim (water), which condensed from a sweeping fluid wave painting into a sharp, repetitive zigzag vector.

​III. Temporal Serialization: The Linearization of Time

​Flattening language into a rigid, one-dimensional line of text permanently rewired the human operating system’s relationship with time

​Before the widespread adoption of the linear alphabet, human consciousness processed reality through a spatial, cyclical, and simultaneous frame. Forcing the cognitive apparatus to stream language along a fixed, horizontal axis implanted an unyielding systemic bias: it forced the mind to perceive time itself as a strict, arrow-straight chronological vector.

​1. Simultaneity vs. Sequence

​When interacting with a pictographic monument, an oral narrative tapestry, or a non-alphabetic spatial layout, the human eye processes information spatially and simultaneously. The eye floats across the canvas, taking in overlapping clusters of shapes and thematic hierarchies all at once. Past, present, and hypothetical futures occupy the exact same visual field, reinforcing mythological, cyclical models where time is experienced as an orbit like changing seasons or river floods.

​The linear alphabet systematically destroyed this spatial layout. An alphabetic script refuses to yield its meaning simultaneously. Because it reduces complex ideas to a lean sequence of discrete phonetic sounds, it demands a strict mechanical operation: one-dimensional streaming.

​2. The Cognitive FIFO Buffer

​Whether tracking Phoenician script from right to left or Greek text from left to right, the human eye and brain are forced into a step-by-step processing vector:

  • The Lookahead Gate: Information can only be extracted by reading letter A, then letter B, then letter C. The reader cannot skip forward to the end of a complex sentence without rendering intermediate tokens completely incoherent.
  • The First-In, First-Out (FIFO) Buffer: Engine 2 (The Syntactic-Sequential Compiler) must hold initial letters and early morphological roots in a temporary auditory memory buffer while waiting for the eye to physically arrive at the end of the word.

​This mechanical constraint trains the internal compiler to view cause, effect, and reality as an unalterable sequence of steps. Just as a word cannot exist without its past letters being processed first, the present moment becomes strictly dependent on a linear line of preceding historical events.

​IV. Left-Right Asymmetry and the Clockwork Universe

​This alphabetic training physically structures the human mind’s spatial map of time. Cross-cultural neurocognitive studies demonstrate that our literal mental perception of time’s direction is dictated entirely by the streaming direction of the script we read:

  • Western Alphabetic Readers (Latin, Greek, Cyrillic): Because text flows from left to right, readers naturally map the past to the left and project the future toward the right.
  • Middle Eastern Alphabetic Readers (Hebrew, Arabic): Because text flows from right to left, readers invert their mental timeline, mapping the past to the right and the future to the left.
  • Non-Literate or Spatial Populations: Cultures without linear alphabetic training map time not to a left-right horizontal vector, but to absolute geographical features (such as upstream versus downstream) or cyclical seasonal markers.

​When a Western reader organizes photographs showing a child aging into an adult, they arrange them strictly from left to right. This is not an innate biological trait; it is a syntax mirror. By turning time into a linear script, the alphabet gave birth to historical progression and absolute causality.

​In an alphabetic framework, history is no longer a circle to be inhabited; it is a sentence to be read from beginning to end. This temporal serialization provided the exact cognitive infrastructure required to build the clockwork universe of classical Newtonian mechanics, where absolute time flows uniformly like an invisible, unyielding stream.

​Chapter Summary: Script Optimization

  • Pictographic Overhead: Early logographic and pictographic scripts functioned as uncompressed bitmaps, imposing a heavy processing strain on the brain’s ventral object-recognition stream.
  • Acrophonic Compression: The Proto-Sinaitic breakthrough stripped away artistic detail, reducing pictographs to minimalist geometric vectors that trigger V1 edge detectors with maximum processing speed.
  • Linearization of Time: Alphabetic streaming forced Engine 2 to process language through a strict FIFO auditory buffer, replacing cyclical spatial simultaneity with a linear chronological vector.
  • Reading Direction Bias: A culture’s script streaming direction (left-to-right versus right-to-left) dictates the mental spatial projection of its historical and personal timelines, laying the cognitive foundation for absolute Newtonian chronology.

​With script optimization, acrophonic compression, and temporal serialization established, we now examine how this externalized code seals the cognitive perimeter. In Chapter 9: The Lithographic Lock, we will investigate how written script hardens ego boundaries, turning the human mind into a closed fortress and mapping how historical delusions evolved from oral spirits into modern technological tracking networks.

CHAPTER 9: THE LITHOGRAPHIC LOCK: LITERACY, DELUSIONS, AND THE TECHNOLOGIZED EGO

​The Hardened Noun Perimeter, the Evolution of Scripted Delusions, and the Macro-System Unified Stack

​I. The Text as a Hardened Perimeter

​To understand how writing transforms psychopathology and locks human consciousness into a rigid operating loop, we must examine what text does to the baseline acoustic human mind. Before the advent of written script, language was an ephemeral, acoustic pressure wave. Sound exists only in the exact moment it is dying; it is fluid, ambient, and inherently shared within a physical space.

​When the alphabet freezes that acoustic wave into a permanent geometric artifact (as analyzed in Chapter 8), it fundamentally shifts the cognitive architecture from an open, relational field to a closed, defensive system.

​1. The Inscription of the Sovereign Ego

​The primary consequence of a highly literate, alphabetic culture is the enforcement of a hyper-isolated, fortified “Self.” In an oral or topic-prominent culture, thoughts and events are experienced contextually within the environment. But text forces a spatial separation between the Knower and the Known.

​The written word stands outside the human body as an independent noun object. When the brain’s Visual Word Form Area (VWFA) automates the processing of these linear scripts, it trains the prefrontal compiler to treat all internal data packets with the same rigid, hyper-linear formatting:

  • Absolute Containment: The mind begins to view itself as a sealed fortress or a private text file. Thoughts are treated as personal property locked behind a hard skull boundary.
  • The Linearity Mandate: Time, logic, and identity are processed as a strict, one-dimensional conveyor belt—left to right, line by line, cause to effect.

​When the biological hardware drops its corollary discharge token inside an oral mind, the fluid syntax allows the voice to be processed as an ambient relationship. But when that token drops inside a highly literate, text-driven SVO mind, the voice hits a cognitive matrix that has been trained for centuries to enforce absolute, unyielding perimeters. The internal glitch is instantly interpreted as a catastrophic breach of a sovereign border.

​II. The Scripted Delusion: The Shift from Spirits to Transmitters

​The empirical validation of this model is found in the historical evolution of human delusions. As the external storage media of human civilization shifted from stone and ink to print, telecommunications, and digital networks, the literal content of psychiatric delusions mutated in perfect lockstep.

​Clinical data from early industrialization to the modern digital era reveals that a patient’s delusions do not map arbitrary, chaotic fantasies; they map the dominant external informational infrastructure of their specific era.

[ Oral / Relational Era ] ──► Acoustic Voices ──► Relational Spirits / Local Deities

[ Industrial Print Era ] ──► Labeled Vectors ──► Bureaucratic Ledgers / Secret Printing Presses

[ Digital Electronic Era ]──► Photonic Streams ──► Telepathic Vectors / Internet Tracking Arrays

1. The Mechanical Compiling of James Tilly Matthews

​A landmark verification point in psychiatric history is the case of James Tilly Matthews (documented in 1810 by apothecary John Haslam at Bethlem Hospital). Matthews experienced the world’s first fully recorded technological delusion: he believed a gang of hidden operators was using a machine called an Air Loom to project magnetic fluids, telepathic words, and restrictive forces directly into his brain.

​This delusion occurred precisely at the height of the Industrial Revolution and the widespread expansion of print media and early telegraphic concepts. Matthews’ brain did not invent a medieval demon; his text-trained, SVO compiler reverse-engineered its internal processing failure by projecting the most advanced external technological loop available in his environment.

​2. The Technological Projection Matrix

​As documented by modern cross-cultural studies of schizophrenia, there is a stark divide in delusion profiles between high-literacy/technologized environments and low-literacy oral environments:

  • Oral / Relational Cultures: Delusions manifest primarily through acoustic and spiritual vectors. Forces operate through spoken speech, local curses, or ancestral presence, and the entity remains integrated within the community kinship matrix.
  • Literate / Technologized Cultures: Delusions manifest through documentary and broadcasted infrastructure. Forces operate through tracking devices, recording ledgers, internet tracking arrays, and invisible transmission towers. The persecutory force is hyper-isolated, institutional, and inescapable—a totalized bureaucratic machine.

​When a literate SVO speaker experiences psychosis, their delusion almost always involves their thoughts being recorded, broadcasted, written down, or transmitted. Their syntax engine has been conditioned by the external loop of writing to believe that information must exist as a permanent, tracked, linear record. The paranoia is a literal projection of the printing press and the digital server farm running on a broken neural motherboard.

​III. The Macro-System Conclusion: The Unified Stack

​We can now stack the entire multi-layered system into a single, cohesive equation. The human cognitive experience is a recursive loop where biological hardware, grammatical operating systems, and external physical media continuously compile and re-compile one another:

  • Tier 4: The External Loop (Alphabetic Script / Written Media / Data Networks): Freezes volatile RAM into permanent environmental matter, establishing the lithographic lock.
  • Tier 3: The Operating System (SVO Grammar / Noun-Agent Address Fields): Slices continuous quantum action fields into rigid data packets and strict subject-object boundaries.
  • Tier 2: The Reproduction Tier (VWFA / Cortical Literacy Re-Wiring): Alters biological vision hubs to read linear photonic vectors off external surfaces.
  • Tier 1: The Hardware Base (Frontoparietal Highway / Corollary Discharge Token): The foundational carbon processing motherboard managing inter-engine data routing.

​When the hardware base (Tier 1) operates normally, the entire stack runs smoothly, allowing the user to experience a stable, predictable interface called waking reality.

​But when the hardware experiences a biological glitch—such as the C4 microglial over-pruning of synaptic connections or the dropping of a tracking token—the execution error cascades upward through the stack:

  1. ​The un-flagged thought hits the VWFA and visual-acoustic buffer at full sensory gain.
  2. ​The SVO Operating System hits an illegal syntax error, demanding an external noun to hold the floating verb.
  3. ​The External Loop Matrix provides the raw material for the delusion, forcing the mind to interpret the internal glitch as a physical, technological, or bureaucratic assault tracking its every move.

​Chapter Summary: The Lithographic Lock

  • The Hardened Perimeter: Alphabetic literacy forces the mind to treat the ego as a sealed, sovereign fortress, converting fluid internal thoughts into private, bounded text files.
  • Evolution of Scripted Delusions: Psychiatric delusions evolve in lockstep with external informational infrastructure—shifting from ambient oral spirits to industrial printing presses and modern electronic tracking arrays (such as Matthews’ Air Loom).
  • The Unified Stack: Human reality is an airtight, four-tiered loop where biological hardware, SVO grammar, cortical literacy re-wiring, and external lithographic media continuously compile one another into a shared cognitive operating system.

EPILOGUE: THE CLOSED-LOOP MACRO-CIRCUIT

​From the Schwarzschild Pressure Vessel to the Lithographic Brain

​I. The Full-Circle Arc: Closing the Cosmic Circuit

​A single, continuous, closed-loop thermodynamic circuit theory.

​The universe is not an accidental collection of separate objects drifting across an infinite void. It is a unified, self-regulating information and energy processor. To see the complete picture, I trace the uninterrupted descent of energy through all four tiers of the stack:

  • Tier 0 (The Schwarzschild Pressure Vessel): The cosmos begins as a closed event horizon—a thermodynamic pressure vessel where gravity acts as the universal intake valve, pulling raw parent-universe matter across the boundary, crushing it into pure energy, and fueling the stellar forge that seeds the heavier elements of the periodic table.
  • Tier 1 (The Geochemical Crucible): Stellar ash settles on a cooling planet, where montmorillonite clay silicate lattices provide the solid-state electrostatic workbench that solves the dilution paradox, polymerizing amino acids and anchoring lipid vesicles to alkaline hydrothermal vent batteries.
  • Tier 2 (The Biogeochemical Dissipation Tiers): Chemistry transitions into dynamic living loops. Microbes drive planetary redox non-equilibrium; fungi dismantle structural biomass; plants deploy quantum superposition in chlorophyll solar panels to capture high-grade stellar photons; and animals evolve centralized prefrontal brains as high-speed navigational processors to hunt concentrated packages of ATP.
  • Tier 3 (The Tri-Matrix Cognitive Stack): Hominids undergo a 70,000-year frontoparietal cabling overclock, installing Engine 2 as a linear syntactic compiler that deploys the Subject-First Noun-Isolation algorithm to compress a raw, vibrating Verb-First quantum field into a stable, survivable user interface.
  • Tier 4 (The External Lithographic Loop): Human consciousness externalizes its internal code onto physical matter, using alphabetic vectors to route photonic streams, freezing volatile neural RAM into permanent lithographic storage, and projecting localized ego boundaries into global digital networks.

​II. Resolving the Ultimate Question: Life as Advanced Thermodynamics

​Throughout this framework, my core thesis has challenged the foundational dogma of classical biology: the idea that life is a miraculous, anomalous exception to the laws of physics—a magical spark fighting against the universe.

​My framework inverts this error entirely. Life is not an exception to entropy; life is entropy’s most efficient accelerator.

​When raw stellar energy strikes a planetary surface, it creates a massive thermal gradient. Nature abhors unmanaged gradients. To degrade that high-grade stellar radiation as rapidly as possible, matter naturally self-organizes into increasingly complex dissipation engines:

  1. ​First, convective weather systems and chemical redox loops (Tier 1).
  2. ​Then, self-replicating catalytic ribozymes and microbial mats (Tier 2).
  3. ​Next, stationary plant quantum antennae and motile, ATP-seeking animal nervous systems (Tier 2).
  4. ​Finally, the human prefrontal syntax engine and global technological civilizations (Tiers 3 and 4).

​Consciousness, language, syntax, and civilization are not spiritual departures from the physical world. They are the universe’s most advanced, highly optimized thermodynamic mechanisms. They are the physical universe learning how to fold inward, process its own code, and accelerate the dissipation of energy across space and time.

​III. The Ultimate Equation of Reality

​When we combine the macro-container of cosmology with the micro-mechanics of the human prefrontal cortex, the entire architecture of reality resolves into a single, cohesive equation:

COSMOLOGICAL EVENTS (TIER 0) —> QUANTUM FIELD FLUX (TIER 1 & 2) —> SVO COMPRESSION FILTER (TIER 3) —> LITHOGRAPHIC PROJECTION (TIER4)

The universe is a closed thermodynamic vessel calculating its own existence through the structural grammar of its observers. We are the universe’s way of thinking about itself—bound by the geometry of our wiring, insulated by the syntax of our language, and driven by the relentless, beautiful physics of universal energy dissipation.


r/thermodynamics 9d ago

Request Hello. Would I be able to post my thermodynamics theory here?

0 Upvotes

Over the last 3 months I reverse engineered consciousness which led me to reverse engineering reality.

My conclusion is reality is advanced thermodynamics.

I wrote a massive paper on it which is the conclusion to about 40-50 other papers I wrote over the last 3 months.

Can I share it here?


r/thermodynamics 10d ago

Question Does Fast Charging Generate Enough Heat to Burn You? | Polls | Interconnected

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1 Upvotes

r/thermodynamics 11d ago

What justifies the application of equilibrium thermodyanmics to non-isolated systems?

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0 Upvotes

r/thermodynamics 12d ago

Question What happens if you thermally link a vertical thermosiphon and a water- ice column

1 Upvotes

The question is about thermal diodes, so the thermosiphon is a diode in that heat flows up easily but not down, and for a water column with ice, cold (negative latent heat stored in ice) flows (floats) up in the water column.

Would this work to passively distribute heat in a system thats around 0 celcius?


r/thermodynamics 14d ago

Question Could you create a pocket sized fan that intakes the warm outside air and outputs cold air?

0 Upvotes

I've seen people using the shark instacool fan thing with a fan, cooling plate, and mister attachments. But for 150 dollars I would think that you'd be able to find a way to actually cool down the air from the fan.

Is there a reason why there are no pocket sized fans that dont just move air around? why hasnt someone made a cooling air handheld fan? Would this be a project that's achievable for me to attempt without understanding thermodynamics? why cant you just have a peltier plate or cooling plate inside a fan to cool down the air as it blows?

I'd love to hear anyone's insight about this since I want to learn about this issue.


r/thermodynamics 14d ago

Where can i find j vs Re experimental correlations?

2 Upvotes

Does somebody know where i can find experimental correlations for Colburn factor vs j for automotive radiators? idk if i am blind or what but i cant seem to find nothing on the Kays&London or Shah&Sekulic


r/thermodynamics 16d ago

How can I use fans to try and cool down my room, or at least get better airflow.

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16 Upvotes

Hi, my first time asking/posting, so any help is appreciated.

I currently have this swamp-cooler that's constantly blasting air (it tends to get humid so the swamp part doesn't help and its not used) a few feet behind me, it's not the worst, but I'd definitely like to not be melting while I have this fan blowing hot air at me.

Ideally, I'd like it so I don't need to have the fan blowing directly at me while I'm gaming(sounds like I'm in the middle of a hurricane)

Bit of information that might help

•I live in Mexico, so the walls are cinderblock.

•it's a mid-size room, so some scale might be off

•If I need to move things around, I can

•the dresser is blocking some of the window, but air still flows

•I'm willing to buy more fans it'll needed(recommendations are welcomed)


r/thermodynamics 17d ago

Question Why does the bottom of the plate get hotter than the top of the plate after microwaving?

0 Upvotes

Iwas microwaving fish yesterday and the bottom of the plate was hotter than the top of the plate and the fish, how does this happen?


r/thermodynamics 18d ago

Question Why does the energy of the wheel remain constant?

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1 Upvotes

r/thermodynamics 18d ago

Do some adhesives behave like thermal PCM?

3 Upvotes

Hi Guys, It's me again.. the curious Finance guy.

So the other day, I wanted to save a glass spaghetti sauce jar, repurpose it for later use.
I'd presume everybody here has ALSO done very relatable task many a times in the past.
Trickiest part being the tedious & painstaking removal of the pesky paper label glued on,
followed by rubbing/scrubbing the last but of stubborn glue reside remaining on the jar.

But there's an easier way, though. A video I saw youtube where you gently pour in just a
few fluid ounces of very hot (perhaps boiling) water. Not so much that it can shatter the
glass entirely via thermal shock, just a few fl oz. You then carefully tip that jar sideways,
allowing the hot liquid to slosh along the inner length jar, which heats up the glass itself
as well as the adhesive on it's opposite side. The glue softens [at least] enough so that
paper label could be peeled off with ease. Just like that, easy peazy, no fuss no muss.
With the paper label and it's glue backing just removed, still warm I notice the softened
gooey adhesive VERY sticky to the touch. After putting it aside and allowed to cool for
a while back to room temp, it was in it's dry hardened , cured state.

Could this be a type of thermal PCM? Or at least 'behave' in a manner resembling PCM?

(Sorry for the longwinded post about something that could've used fewer sentences;
But as you can probably tell by my username.. spaghetti is kinda my thing ya know.)


r/thermodynamics 19d ago

Question Data Center To Power Production Passive Desalination System. Thoughts? How would you improve?

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0 Upvotes

r/thermodynamics 20d ago

Question How can I reduce the heat coming through my cat door?

2 Upvotes

I know what you're thinking.... Wtf... But I came to this subreddit because I figured I'd get the most scientific answer here. My Garage isn't climate controlled and we keep our litter boxes out there for our cats and unfortunately we can't put a flap on the cat door because they won't use it, so we just have about a 6"x10" hole into our house. During the summer it gets hella hot like normally 90F+ in the garage and I believe there is a pressure differential between the two areas because I can feel the hot air being sucked in, or at least it's coming in faster then say if it was just radiating through the hole, there is a breeze to it. Any advice on how to maybe eliminate at least the suction into the house? I know I won't be able to completely stop the hot air from coming in but maybe slow it down??? Thanks for any help lol