asteroza + atmospheric   38

Team JMCC WING -Water Abundance XPRIZE Competition | Indiegogo
Some sort of low eight high torque wind turbine using fabric blades (and fabric duct), seems to use a pole/wire tensegrity structure
tensegrity  structure  high  torque  wind  turbine  power  generator  fabric  blade  atmospheric  water  fog  collector 
october 2018 by asteroza
Conceptual Design of an Air-Breathing Electric Thruster
Seems beehive-style inlets for air scooping at low orbital altitudes are in.
PROFAC  low  altitude  orbital  atmospheric  gas  scoop  ramscoop  inlet  design  aerodynamics  space  research 
april 2018 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
Directed energy atmospheric lens could revolutionise future battlefields | BAE S...
Using the edge of the atmosphere as a surface interface, which can be manipulated with pulse lasers to be physically shaped into lens shapes to fiddle with optics. So can be used as a focuser for lasers and ground observation telescopes, and as a diffuser for self protection/obfuscation of space assets.
BAe  laser  atmospheric  lens  pulse  kerr  effect  optics  research  technology  space  telescope  observation  surveillance  defense  military  Delicious 
january 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
Mars Molniya Orbit Atmospheric Resource Mining | NASA
Interesting cyclic PROFAC for Mars. Using Molniya orbits is certainly different, but the main part looks to be a deep diver atmospheric scoop that spends more time out of atmosphere to cool/liquify propellant. Is this simply aerocapture by another name?
NIAC  NASA  mars  atmosphere  atmospheric  scoop  diver  ramdiver  ISRU  propellant  collection  PROFAC  ramscoop  aerocapture  molniya  orbit  Delicious 
april 2016 by asteroza
Updated parametric study of orbital fuel depot atmospheric gas collector designs, notably PROFAC. Some of the study decisions I take issue with, but the results are useful. Generally, unless serious tricks are involved, particularly power density, air scoopers aren't happening. Good match for beamed power applications, and there might be room for tethered scoop trawler designs that get more of the power system mass in lower drag higher orbits.
PROFAC  orbital  propellant  fuel  air  nitrogen  oxygen  collection  collector  scooper  scoop  space  technology  research  atmosphere  atmospheric  ramscoop  ramdiver  depot  orbit  Delicious 
january 2015 by asteroza
Passive radiative cooling below ambient air temperature under direct sunlight : Nature : Nature Publishing Group
Interesting mixed material which re-emits heat at atmospheric IR transparency windows, effectively becoming a passive cooler. So an external radiator on earth covered with this paint can get pretty cool.
photonic  radiative  cooling  solar  radiator  mirror  selective  thermal  emitter  materials  science  research  technology  passive  hafnium  silicon  dioxide  tuned  cooler  nanoparticle  layer  IR  infrared  transparency  window  atmospheric  green  paint  surface  treatment  Delicious 
december 2014 by asteroza
Eternal Flight as the Solution for 'X'
Use centrifugally stiffened (fabric?) rotors as a means of achieving very low weight wings. The extreme case being a kind of floppy tip driven helicopter, using solar fabric wings and electric props?
CSR  centrifugally  stiffened  rotor  wing  NASA  NIAC  atmospheric  satellite  stratellite  Delicious 
june 2014 by asteroza
Space Transport and Engineering Methods: - Wikibooks, open books for an open world
(danielravennest) Dani Eder's big space tech book/wiki. See his seed factory von neumann self replicator research too.
propulsion  information  technology  transportation  wiki  space  infrastructure  reference  engineering  spaceship  PROFAC  atmospheric  air  mining  ramscoop  scoop  ramdiver  Delicious 
january 2013 by asteroza
Atmospheric Vortex Engine
A heat engine of sorts, using a captive tornado rather than a solid walled chimney. Apparently getting some light VC funding now, but this guy has been running on fumes for years. I wonder what caused the sudden investment now?
energy.  green  generator  power  tornado  captured  captive  engine  vortex  atmospheric  AVE  Delicious 
december 2012 by asteroza
NBD | Home
Building essentially solid state fog/dew/atmospheric humidity water harvesters using special surface coatings mimicking desert beetles. Now you too can be a Star Wars moisture farmer!
texture  pattern  micropattern  dehumidifier  agriculture  camping  hardware  gear  survival  coating  surface  nanotechnology  technology  research  science  materials  harvestor  water  dew  humidity  atmospheric  textured  nanotextured  hydrophillic  hydrophobic  biomimicry  Delicious 
november 2012 by asteroza
Direct Air Capture of CO2 with Chemicals
$600/ton for CO2 capture, according to this tech review. I'm willing to believe this is a more negative assessment of the bottom range of the cost range, compared to the newest techniques. In theory this only gets cheaper as the atmospheric PPM get higher too, unfortunately.
capture  research  assessment  economic  doxide  carbon  CO2  atmospheric  atmosphere  air  direct  Delicious 
october 2012 by asteroza
NASA - A Plasma Aerocapture and Entry System for Manned Missions and Planetary Deep Space Orbiters
Nice research into near massless plasma shell reentry heat shields. No mention of how the RMF is made though, though there was talk of needing a superconducting loop in the past.
NASA  plasma  magnetoshell  magnetic  aerocapture  atmospheric  braking  decelerator  reentry  entry  shield  heatshield  heat  insulation  technology  research  space  propulsion  rotating  field  RMF  Delicious 
september 2012 by asteroza
Electrochemical Acceleration of Chemical Weathering as an Energetically Feasible Approach to Mitigating Anthropogenic Climate Change - Environmental Science & Technology (ACS Publications)
Interesting argument to throw sodium hydroxide derived from sea salt back into the sea to make it more basic, to counteract ocean acidification while sucking in more atmospheric CO2. Deal with the hydrochloric acid byproduct by mixing it with rocks, and dump that into the sea as well. Might in theory be cheaper than trying to do air carbon capture.
ocean  acidification  geoengineering  CO2  carbon  dioxide  sequestration  concept  research  climate  changecatpure  storage  atmospheric  Delicious 
december 2011 by asteroza
IEEE_AerospaceConference_PHARO_2010.pdf (application/pdf Object)
PHARO paper showing a diffuser collector inlet, much like more conventional ramjets, is better for hypersonic reasons.
PROFAC  PHARO  ramdiver  ramscoop  air  airscoop  scoop  atmospheric  propellant  fuel  collector  ISRU  space  transportation  infrastructure  research  Delicious 
november 2011 by asteroza
Harvesting_Gases_in_LEO_to_Propel_Spacecraft.pdf (application/pdf Object)
Wow, Sterge Demetriades really got shafted for his work on PROFAC. I wonder what those other 3 ARS/AIAA papers look like? FOIA request to declassify them perhaps? Lots of other interesting tidbits in this PDF. Using the LOXLEO collector materials concept as a capture liner on a more conventional PROFAC cone nozzle input for the MHD ramjet might be the trick to doing this right.
PROFAC  PHARO  ramdiver  ramscoop  air  airscoop  scoop  atmospheric  propellant  fuel  collector  ISRU  space  technology  transportation  infrastructure  research  Delicious 
november 2011 by asteroza
Harvesting LOX in LEO.pdf (application/pdf Object)
Patented by Paul Klinkman? Claims of a patent application with 34 claims, but nothing showing up in google patents though. Electrodynamic tether boosted collector, 50Km tether needs 60N thrust mounted trailing up only, 325km collector altitude, 30m mouth. Focused on oxygen collection though (altitude where oxygen is about 85% dominant).
LOXLEO  PROFAC  PHARO  ramscoop  ramdiver  air  airscoop  scoop  atmospheric  propellant  fuel  collector  ISRU  space  transportation  infrastructure  technology  research  LOX  LEO  Delicious 
november 2011 by asteroza
Scooping atmospheric air (PROFAC revisited)
Hrm, PHARO variant resembling a ramscoop connected to a solar array kite joined together via an electrodynamic tether, to possibly eliminate the MHD ramjet for propulsion and increase solar array size? It would also keep the large solar array out of the high drag regime. You could even go for an inflatable solar array. Though vehicle dynamics gets ugly, and now you are dragging around two and half objects through crowded airspace.
PROFAC  PHARO  atmospheric  air  propellant  collector  fuel  electrodynamic  tether  propulsion  space  transportation  infrastructure  technology  ramdiver  airscoop  scoop  ramscoop  ISRU  Delicious 
november 2011 by asteroza

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