Dual Cool Jets Enable Better Avionics Computing

I would like to share a “cool” technology being developed at GE by a team that includes GE Aviation SystemsGE Intelligent Platforms, and GE Global Research.  It is called the Dual Cool Jet (DCJ).

It consists of two peizo-electric elements, separated by an elastomer.  A sinusoidal voltage is delivered to the peizo-electric elements.  The elastomer forms an orifice that allows a fluid to enter and exit the device as the motion of the piezo-electric elements expands and contracts the volume between them.  The result is a strong jet of fluid exiting the orifice – creating vortices that entrain additional fluid downstream of the device.  The jet of fluid is used to help remove heat from electronic systems, such as Avionics boxes.  The result is better Avionics computing.

Exploded View of the GE Jet Pack with two Dual Cool Jets (DCJs)

The jets were originally developed at GE Global Research as way to control the flow around various aerodynamic structures, thus improving the aero performance.  The physics and form factor of the fluidic device appeared to be advantageous to thermal management of electronics.  Initial testing confirmed the hypothesis.  Since that time, DCJs have been shown to improve the performance of LED lighting, laptop computers, and other consumer electronics.

Another area of impact is in aerospace, where the capability of Avionics computing is limited by the ability to remove heat from the electrical devices.  The highest thermal resistance for most Avionics systems is convection of heat from the outside of the chassis to the ambient environment.  With DCJs, the convection thermal resistance can be reduced by a factor of 3 or more.  There are three potential benefits:

– More computing capability – can operate more processors or increase processor speed
– Better device reliability – by operating at a lower device temperature
– Use in harsher environments – can operate in a higher ambient temperature

The designer can use the increased thermal capability to concentrate on one of these benefits, or spread it out to two or three – depending on the application requirements.

The GE team has designed ruggedized packaging and a ruggedized electronic driver for Avionics applications.  In the coming year the team will complete reliability demonstration testing and execute the integration of DCJ’s into some GE Avionics products.

GE is commercializing DCJ technology by licensing it to qualified manufacturers in the thermal management industry. For more information on licensing DCJ or utilizing it in your next generation products, contact GE Idea Works.

Check out this video by Engineering TV to learn more about how this technology can be used in avionics.

1 Comment

  1. Gisella

    Help in summarizing this?The hrtosiy of the development of electrochemical cells is crucial to the scientific study and industrial applications of electricity, for prior to the rise of electrical grids around the end of the 19th century, they were the main source of electricity. Successive improvements in battery technology permitted the rise of major electrical advances, from early scientific study to the rise of telegraphs and portable electronics.In 1749, Benjamin Franklin first used the term battery to described a set of linked capacitors he used for his experiments with electricity. These capacitors were panels of glass coated with metal on each surface.[1] These capacitors were charged with a static generator and discharged by touching metal to their electrode. Linking them together in a battery gave a stronger discharge.However, Alessandro Volta, a friend and fellow scientist, disagreed, believing this phenomenon was actually caused by two different metals being joined together by a moist intermediary. He experimentally verified this hypothesis, and published it in 1791. In 1800 Volta invented the first true battery which came to be known as the Voltaic Pile.Consumable dry cells are sold in a great rate ,they are used in different fields and they are available in a variety of sizes,emf values,….etc.consumable dry cells are not recycled,they are thrown without having a special treatment because batteries contain toxic elements inside it so they need a special factories by which we can safely get rid of them.these dry cells nowadays are an important factor that causes pollution,so the world started to search for sources that are less polluting and are not limited by supply.there are many alternative sources the humanity nowadays is using as solar energy,wind energy,hydroelectric energy,geothermal energy,ocean energy…..etc.Solar energy is one of the most important alternative energy sources,and relating this field to batteries solar energy helped in decreasing the use of the dry cells by inventing the solar batteries .