asteroza + absorber   73

Contactless steam generation and superheating under one sun illumination | Nature Communications
Okay, it's cheating to say one sun when using a concentrator, but switch from direct contact heat transfer with capillary flow to IR emitter and vapor passthru is interesting
carbon  foam  solar  heat  absorber  IR  thermal  emitter  steam  generator  passive  materials  science  research  technology 
december 2018 by asteroza
CalWave | Converting Waves into Electricity and Freshwater
Some sort of "wave carpet" planar absorber located below waves, emulating the damping ability of muddy sea bottoms.
wave  carpet  energy  converter  absorber  power  generator  marine  offshore  research  technology 
october 2018 by asteroza
The optical duality of tellurium nanoparticles for broadband solar energy harvesting and efficient photothermal conversion | Science Advances
Putting the tellurium nanoparticles directly in the water sounds like a bad plan for an industrial process, but this might lead to a better solid absorber for a thermal receiver?
tellurium  nanoparticle  broadband  solar  absorber  materials  science  research  technology  nanophotonic  photothermal  water  evaporation  seawaer  thermal  desalination  distillation 
august 2018 by asteroza
Global Air Cylinder Wheels (GACW) | Air Suspension Wheel (ASW) for mining, forestry, agriculture, construction and the military
Interesting airless tire system, using internal pneumatic shock absorbers for suspension and decoupling the wheel between lateral and vertical forces
airless  tire  wheel  pneumatic  shock  absorber  transportation  technology  research 
january 2018 by asteroza
Phys. Rev. B 96, 165431 (2017) - Dynamically tunable extraordinary light absorption in monolayer graphene
stamping graphene into an optical well surface to up light absorption, possibly dynamically tunable wavelength absorption by changing optical well shape/size
optics  materials  science  research  technology  graphene  stamp  stamping  microstamping  nanostamping  nanostructure  light  absorber 
january 2018 by asteroza
Carnegie Clean Energy
Formerly did raw seawater pumping to shore, but the friction losses apparently were insurmountable, and the latest design has a wave pump driven hydraulic motor running an electrical generator within the buoy for PTO.
CETO  wave  green  energy  point  absorber  buoy  power  generator 
july 2017 by asteroza
Steam generation under one sun enabled by a floating structure with thermal conc...
Weird hybrid of a thermal concentrating foam, an IR transparent selective absorber cover, and clear bubble wrap cover to prevent heat leakage above the cover.
steam  generator  thermal  foam  bubble  wrap  concentration  solar  selective  absorber  Delicious 
august 2016 by asteroza
Composite 3D-printed metastructures for low-frequency and broadband vibration ab...
Making rocket payload launch shrouds out of engineered foam metastructures to integrate sound absorption.
3D  printing  fabbing  engineered  foam  metastructure  structure  sound  absorber  launch  payload  shroud  cover  rocket  space  materials  science  research  technology  Delicious 
august 2016 by asteroza
Subwavelength total acoustic absorption with degenerate resonators
Two stage sound absorber. Uses a primary absorber/resonator that leaks sound at specific frequency, which is then absorbed by a specifically tuned secondary absorber/resonator.
acoustic  sound  canceller  cancellation  absorber  dual  resonator  silencer  physics  research  technology  materials  science  Delicious 
july 2016 by asteroza
KTH | Making waves with new gear technology
The cascade gear drivetrain that converts linear to rotary movement is kinda interesting. Though for a point absorber, it's probably the difference between a hydraulic pump's valving breaking, and this one grinding it's pinion gear teeth.
cascade  gear  pinion  linear  motion  converter  rotary  ocean  wave  power  generator  point  absorber  hardware  electronics  devices  Delicious 
february 2015 by asteroza
Bio-inspired impact-resistant composites
Mimic mantis shrimp claw endocuticles with spiral laid carbon fiber composites to gain impact resistance.
biomimicry  mantis  shrimp  biological  composite  carbon  fiber  spiral  ply  winding  helicoidal  impact  absorber  shield  armor  materials  science  research  technology  Delicious 
april 2014 by asteroza
How to tap the sun’s energy through heat as well as light - MIT News Office
CNT absorber fronting a photonic crystal matched to a PV cell to make a new higher performance solar thermophotovoltaic power generator.
nanphotonic  photonic  crystal  solar  thermophotovoltaic  CNT  carbon  nanotube  heat  absorber  silicon  dioxide  emitter  PV  cell  high  temperature  power  generator  green  energy  materials  science  research  technology  nanotechnology  two  layer  STPV  Delicious 
january 2014 by asteroza
Neutron Absorber Material | Holtec International
New nanoparticle based metal matrix composite basket for spent fuel rods, with such high thermal conductivity that spent fuel can be stuffed into a dry cask after only 3 years in a cooling pond.
Metamic  Metamic-HT  high  temperature  aluminum  boron  carbide  metal  matrix  composite  neutron  absorber  spent  fuel  rod  basket  dry  cask  waste  storage  nuclear  materials  science  research  technology  nanotechnology  powder  metallurgy  nanoparticle  alumina  alloy  dispersoid  Delicious 
december 2013 by asteroza
太陽光の熱を朝日から夕陽まで回収し効率よく発電:報道発表資料|2013年 プレスリリース|理化学研究所
Riken's press release on the Fresnel lens solar thermal wankel rotary heat engine. Apparently the lens tech is fairly advanced, being developed as a telephoto lens for observing high energy cosmic rays, with high optical transparency and a surface roughness less than 20nm. They used a three sided lens structure (top plate and two vertical plates), called a "Fresnel Sun House" to gather light well onto a T shaped thermal absorber/heat exchanger, even when the sun is close to the horizon at sunrise/sunset.
absorber  concetrator  cycle  thermal  optics  engine  green  plate  rotary  wankel  solar  heat  lens  research  japan  Riken  generator  power  CHP  fresnel  exchanger  energy  rankine  Delicious 
january 2013 by asteroza
Carbon Dioxide Capture from the Air Using a Polyamine Based Regenerable Solid Adsorbent - Journal of the American Chemical Society (ACS Publications)
Interesting low temperature PEI absorber design, depositing it on fumed silica to increase surface area for CO2 capture from atmospheric air. Low temps (85C) drive the Co2 back out, making absorber regeneration relatively simple.
polyethylenimine  PEI  polyamine  polymer  air  carbon  capture  CO2  fumed  silica  absorber  high  surface  area  Delicious 
january 2012 by asteroza
Carnegie Wave Energy
Nice part of this is that it basically is a submerged buoy actuated seawater pump, sending high pressure seawater ashore to a turbine station on land, keeping the electrical bits dry. Water pressure can be used directly for desalination as well.
CETO  wave  power  generator  green  energy  reciprocating  hydraulic  seawater  ocean  Water  pump  buoy  desalination  high  pressure  marine  structures  point  absorber  Delicious 
december 2011 by asteroza
Nanoscale Research Letters | Full text | Tailoring photonic metamaterial resonances for thermal radiation
This seems to use the same kind of tricks as those luminescent solar concentrator plates, that internally reflect captured light and convert the frequency internally to retransmit to edge PV modules. Just shifting down to IR. The interesting bit is the prevention of reradiation through the top surface, which provides the potential for solar thermal power generation without concentrating mirrors using not well aligned surfaces of panels manufactured using chip fabrication techniques.
TPV  selective  absorber  photonic  metamaterial  resonance  crystal  thermal  emission  radiation  reradiation  solar  IR  concentrating  thermophotovoltaic  materials  science  research  technology  nanotechnology  optics  Delicious 
december 2011 by asteroza
NASA - NASA Develops Super-Black Material That Absorbs Light Across Multiple Wavelength Bands
So this might be useful for solar concentrator absorbers and space radiators (up to 750C in air maybe, up to 2800C in a vacuum), but maybe not so good for other applications.
carbon  nanotube  black  broadband  absorber  surface  coating  materials  science  research  technology  nanotechnology  optics  Delicious 
november 2011 by asteroza
A Super-Absorbent Solar Material - Technology Review
Interesting work since it isn't polarization dependent, unlike that loss medium research which seemed to need some phase canceling effects to work right.
thin  film  plasmonic  broadband  absorber  optical  resonance  materials  science  optics  research  technology  nanostructure  wedge  pattern  nanotechnology  Delicious 
november 2011 by asteroza
Coherent Perfect Absorbers
Interesting research on creating the opposite of a laser, a sort of antilaser. A loss medium basically disrupts a laser, which had been amplified in a gain medium. Demo is near IR. Hoping for slightly more broadband sources. Could be used for laser heat absorbers as a thermal laser receiver in remote power beaming applications...
CPA  coherent  perfect  absorber  loss  medium  antilaser  light  receiver  heat  IR  laser  silicon  semiconductor  optics  materials  science  research  technology  Delicious 
november 2011 by asteroza
Home of Poseidon - Floating Power Plant -Sustainable Energy Power Plants - Poseidon's Organ
Oddball hybrid floating power generator, using a turret mooring system to connect a trimaran-like structure mounting wind turbines and point absorber wave power generators.
hybrid  offshore  floating  platform  wind  wave  turbine  power  generator  green  energy  marine  ocean  structure  mixed  renewable  point  absorber  Delicious 
april 2010 by asteroza

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