habe gerade einen interessanten Artikel gelesen (PM 04/2005 S.29).
Auf folgendem Link des MIT (Massachusetts Institute of Technology)
---> H I E R <---
geht es um folgendes:
Das MIT hat eine WINZIGE Gasturbine aus Silizium gebaut. Diese Turbine ist so groß wie eine 20ct Münze und erzeugt bis zu 50 W.
Verbrannt werden winzigste Mengen an Diesel. Die Turbine hat eine Drehzahl von 1,2 Millionen Umdrehungen. Gedacht ist dieses Aggregat für Handys, Kameras und allen Stromverbrauchern. Als Konkurenz zur Brennstoffzelle.
Bietet bei gleicher Größe, die 10-fache Leistung der Brennstoffzelle.
Wie bei einem Flugzeug oder Gasturbinen-Kraftwerk wird ein Treibstoff-Luft-Gemisch verdichtet und verbrannt. Das heiße Abgas treibt eine Turbine an und erzeugt Strom.
Einsatzzweck zunächst: Militärisch!
In spätestens 3 Jahren soll es kommerziell auf den Markt kommen.
Abwartenden Gruß
Jens
Hier der Originaltext des MIT:
Microengine Materials, Structures and Packaging
Includes tasks of materials characterization and constitutive modeling and the overall thermal and structural design of the microengine and associated devices. Packaging includes the design and fabrication of the interfaces of these micro-devices with the macro-world, including fuel supplies, air intakes and electrical contacts.
Professor S. Mark Spearing
Micro Bearing Rig Rotordynamics
A fundamental enabling technology needed for all the high-power-density micro devices is the ability to spin silicon rotating elements, supporting the turbomachinery and electrical components, at peripheral speeds of several hundred meters per second, over two orders of magnitude faster than silicon rotors have previously achieved. This research focuses on experimental studies on the rotordynamic and hydrostatic journal gas bearings and thrust bearings of the micro devices.
Prof. Zoltan Spakovszky, Prof. Alan H. Epstein, Prof. John Brisson, Dr. Fredric Ehrich, Dr. James Paduano
MicroEngines (MEMS Gas Turbines, Generators, & Rocket Engines)
A multidisciplinary effort, in cooperation with the MIT Micro Technology Laboratory, is underway to develop gas turbine and rocket engines a few millimeters in diameter spinning at 2-5 __106 rpm. The devices would be capable of producing 10-50 watts of power or 10-30 grams of thrust. Applications include battery replacement and micro-airplane propulsion. A subset of this effort is a program to build micro electric motor driven compressors of similar size. Also, a bipropellant, turbopump equipped, centimeter sized micro rocket engine, producing 3-5 lb. of thrust, is under development. There efforts encompasses all aspects of gas turbine and rocket propulsion engineering, including the fluid mechanics of turbomachinery, mechanical design, structures and materials, combustion, bearings, electric generators, materials, and microfabrication.
Prof. Alan H. Epstein
MEMS in Turbomachinery
An analytical and experimental program which is evaluating the use of large arrays of high frequency response micro-fabricated flow valves arranged on the tip casing of a compressor to alter the tip flowfield in an advantageous manner.
Dr. Choon Tan
