asteroza + cooling   256

Reducing the temperature of compressed air or cooling turbine blades allows for more power from a jet engine.
That thermosyphon gas turbine blade, along with a heatpipe connected turbine blade preheating combustion air is wack
thermosyphon  heatpipe  gas  turbine  blade  cooling 
yesterday by asteroza
Shop our body cooling vests | Ezcooldown
body cooling vests, that are popular with furries, who have a real need for this sort of thing, and this brand is particular popular because it doesn't suck (as verified by military furries)
furries  body  cooling  vest  ice 
4 weeks ago by asteroza
Self-sustained biphasic catalytic particle turbulence | Nature Communications
Adding a little hydrofluoroether (HFE) organic solvent to a water based turbulent heater exchanger ups heat transfer 5x because the bubbling action assisted by the HFE pulls new cold liquid to the heat exchanger surface
hydrofluoroether  HFE  turbulent  water  heat  exchanger  cooling  research  technology  transfer  turbulence  active  particle  agitation 
5 weeks ago by asteroza
(PDF) Concept of an Accelerator-Driven Advanced Nuclear Energy System
This is that chinese ASDR concept using solid micrograins as a pumpable solid coolant that doubles as the neutron spallation target for the particle accelerator. Apparently there were concerns over the thermal shock from a beam trip event requiring a more robust neutron target.
china  ADANES  ADSR  accelerator  driven  subcritical  nuclear  reactor  solid  grain  cooling  coolant  neturon  spallation  target 
5 weeks ago by asteroza
Numerical investigation of the convection heat transfer driven by airflows in underground tunnels - ScienceDirect
Using subway tunnels as the heat source in a ground source heat pump setup for district heating maybe. I suppose that's one solution to the London Underground overheating problem...
heating  cooling  HVAC  subway  tunnel  ground  source  heat  pump  district 
12 weeks ago by asteroza
A radiative cooling structural material | Science
using boiling hydrogen peroxide, these researchers reduced/compressed wood by removing the lignin, making an engineered wood with interesting properties, such as high strength. The kicker is that the white material is also a narrowband IR emitter tuned to dump heat to space through the atmospheric windows, so it can cool you in broad daylight.
engineered  wood  lignin  removal  narrowband  IR  emitter  atmospheric  window  insulation  cooling  subambient 
may 2019 by asteroza
Wearable thermoelectrics for personalized thermoregulation | Science Advances
These guys are going more for a flexible fabric membrane with embedded thermoelectric coolers, eventually going to a full vest size.
personal  cooling  thermoelectric  cooler  peltier  effect  health  medicine  research 
may 2019 by asteroza
Turbo Compressors Enable Lighter Satellites ~ Celeroton AG - Ultra-high-speed electrical drive systems
better than 5kw/kg specific power heat pump using isopentane (roughly 10x better than normal). New compressor designs used in microturbine
microturbine  isopentane  heat  pump  turbine  research  technology  cooling  satellite  space 
april 2019 by asteroza
Saarbrücken research team uses artificial muscles to develop an air conditioner for the future | Universität des Saarlandes
Using nitinol shape memory alloys as the thermal medium/matrix in a thermal wheel rotary air heat exchanger, where the wheel itself is the HVAC system!
rotary  heat  exchanger  thermal  wheel  air  entropy  nitinol  shape  memory  alloy  metal  conditioner  heater  HVAC  mechanical  materials  science  research  technology  cooling  heating 
march 2019 by asteroza
Review of Fractal Heat Exchangers
Interesting bit about fractal design based heat exchangers. Promise less pressure drop
fractal  heat  exchanger  design  cooling  research  technology 
march 2019 by asteroza
Optical cooling achieved by tuning thermal radiation
optical cooling by sticking two objects less than the wavelength of thermal radiation from each other
optical  cooling  photodiode  materials  science  physics  optics  research  technology 
february 2019 by asteroza
Aster Thermoacoustics
Interesting work on both thermoacoustic heat sources and matched bidirectional turbines for electrical power generation. Thermoacoustic electrical generators previously used linear alternators, but those prefer faster cycles, which is opposite what the thermoacoustic wants (parts sizing goes up unfavorably when scaling), and slower long stroke linear alternators also have issues (long piston stroke, sealing issues). Using a rectifying bidirectional turbine may be a convenient workaround.
EU  europe  holland  thermoacoustic  research  acoustic  wave  rectifying  bidirectional  turbine  power  generator  cooling  waste  heat  recovery 
february 2019 by asteroza
SoundEnergy – Thermo acoustic cooling technology
Thermoacoustic cooler that uses waste heat to make cold directly, no electricity stage
thermoacoustic  cooler  refridgerator  cooling  waste  heat  recovery 
february 2019 by asteroza
Diamonds could have the power to recharge drones in flight
Some sort of laser power beaming, using diamond cooled LED lasers?
diamond  cooling  LED  laser  wireless  power  beaming  WPT  transfer 
december 2018 by asteroza
3M and Allied Control Cool Clusters with Novec Bubble Bath
So a HK bitcoin miner switched from FPGA's to ASIC's, but used liquid cooling to keep the mining rigs on-site.
3M  flourinert  Novec  HFC  liquid  immersion  cooling  datacenter 
november 2018 by asteroza
Simultaneously and Synergistically Harvest Energy from the Sun and Outer Space - ScienceDirect
If you can take out the backing metal foil of a PV panel, then line the bottom with a narrow band IR re-emitter that converts rooftop heat to a band that can escape out of the atmospheric IR window, allows roof cooling and power generation simultaneously in theory.
solar  PV  panel  narrowband  IR  emitter  roof  cooling  power  generator  materials  science  research  technology 
november 2018 by asteroza
Trying to do low temperature delta heat exchangers via cheap polymer membranes
polymer  membrane  low  temperature  heat  exchanger  cooling  materials  science  research  technology 
october 2018 by asteroza
Working to keep people cool and safe in personal protective gear - Scope
Uh, so a frozen camelbak connected to a circulator pump connected to biker gloves, cooling the hand palms at 15C.
human  cooling  hazmat  suit 
october 2018 by asteroza
Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling | Science
New cheapish polymer coating to make a narrowband IR emitter that pumps through the LWIR atmospheric transmission window. So something can be cooled by exposing it to the sky.
passive  daytime  radiative  cooling  narrowband  emitter  IR  materials  science  research  technology  polymer  surface  coating  air  void  phase  inversion 
october 2018 by asteroza
A multicaloric cooling cycle that exploits thermal hysteresis | Nature Materials
Uses a ring of shape memory alloy, and magnets plus compression rollers to enable a 6 stage cooling system.
shape  memory  metal  alloy  giant  magnetocaloric  refridgeration  cooling  materials  science  research  technology  permanent  magnet 
september 2018 by asteroza - 3D printed impeller allows drone to operate for thousands of hours | 3D Printer News & 3D Printing News
3D printing making microturbine turbine blade internal passage air cooling possible, allowing hotter temps thus higher efficiency
3D  printing  fabbing  radial  microturbine  manufacturing  research  technology  air  cooling  cooled  turbine  blade  internal  passage 
september 2018 by asteroza
This is borderline cooling version of a perpetual energy generator, but this is an interesting take on fog net concepts. By lightly ionizing the fog and the capture mesh/net, you can get fog droplets to condense better on the net and exceed normal fog nets (which capture 1-3% of passing droplets).
cooling  tower  fog  net  mesh  droplet  capture  ion  ionizing  water  vapor  electrostatic  space  charge  collection 
june 2018 by asteroza
COMPUTEX2018 FROSTBIT | Research Idea Gear
heatpipe cooler for M.2 drives, with the final heatsink capable of swinging side to side to accommodate internal obstacles.
M.2  NVMe  heatsink  cooler  cooling  heatpipe  hardware  PC  accessories 
may 2018 by asteroza
Special Purpose Nuclear Reactor (5 MW) for Reliable Power at Remote Sites Assessment Report
Report on a brayton air cycle turbine cooled reactor, aka the MegaPower variant of the KiloPower/KRUSTY reactor design
nuclear  reactor  brayton  cycle  air  turbine  cooled  cooling  research  technology  MegaPower  KiloPower 
may 2018 by asteroza
Home - Embr Labs
Not a full cooling solution (doesn't seem to work well above 85 degrees ambient), but possibly good enough for temporary heat relief. Wonder if that's a limitation of the heatsink?
personal  cooling  hardware  electronics  devices  peltier  cooler  kickstarter  wristband  bracelet  temperature 
october 2017 by asteroza
SkyCool Systems: The future of cooling
Rejecting heat through atmospheric IR windows to space from the ground. Potentially cooling to sub-ambient!
atmospheric  IR  window  heat  rejection  cooling  HVAC 
september 2017 by asteroza
Patent US20160027536 - Mobile heat pipe cooled fast reactor system - Google Patents
MegaPower, a heat pipe cooled small nuclear reactor, based on the KiloPower work that recently got funded by NASA. Not much comment on the final power conversion system, but heavily implied to be open air cycle brayton. Intended for places like forward bases (FOB)
MegaPower  KiloPower  heatpipe  cooling  cooled  nuclear  reactor  research  patent  LANL  container  containerized  modular  small 
july 2017 by asteroza
OSF | Condensed Publication DRAFT- HOLOS Design 06 23 2017 .pdf
From the designer of CAESAR, a new air cooled nuclear reactor design the fits in a cargo container
pebble  bed  high  temperature  nuclear  reactor  brayton  cycle  power  turbine  generator  air  cooling  compact  container  containerized  subcritical  SMR  modular 
july 2017 by asteroza
Google back geothermal HVAC startup
geothermal  ground  sourced  HVAC  heating  cooling  google 
july 2017 by asteroza
Not a swamp cooler per se, just increasing local humidity with ground cooled water to increase the deltaT of the heat exchanger, also needs water...
external  AC  air  conditioner  accessories  mist  cooling 
july 2017 by asteroza
High Temperature Near-Field NanoThermoMechanical Rectification : Scientific Repo...
thermal diode with actuator to move hot side closer to cold side if hot side is getting hotter
thermal  diode  materials  science  cooling  research  technology  Delicious 
april 2017 by asteroza
Radiative cooling to deep sub-freezing temperatures through a 24-h day–night cyc...
New record, but requires shading from direct sunlight, and a vacuum chamber, and a zinc selenide emission window on the vacuum chamber wall. But 37 degrees below atmospheric ambient is pretty damn good.
atmospheric  IR  window  heat  rejection  vacuum  chamber  zinc  selenide  cooling  Delicious 
december 2016 by asteroza
Traveling-wave thermoacoustic refrigerator driven by a multistage traveling-wave...
Can operate on sub-300C heat pretty well, so suitable for waste heat/bottoming cycle applications.
multistage  regenerator  traveling  wave  thermoacoustic  engine  refridgerator  cooling  Delicious 
december 2016 by asteroza
Radiative human body cooling by nanoporous polyethylene textile | Science
So visual light opaque but IR transparent polyethylene fibers (used in batteries) can be used to make clothing that feels cooler since it isn't trapping IR heat. Coupled with some treatment to make it hydrophilic so it doesn't bead up sweat, and it could be the basis for new summer clothes.
polyethylene  textile  materials  science  research  technology  clothing  apparel  fabric  cool  cooling  Delicious 
september 2016 by asteroza
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