By Marthe Mathilde. Electrical Wiring. Publised at Tuesday, August 15th 2017, 16:58:02 PM. Electricity distribution is the penultimate stage in the delivery (before retail) of electricityto end users. It is generally considered to include medium-voltage "less than 50 kV"power lines, electrical substations and pole mounted transformers, low voltage"less than 1000 V" distribution wiring and sometimes electricity meters.
By Faustine Arnaud. Engine Wiring. Published at Saturday, January 27th 2018, 02:32:03 AM. Even the most efficient and robust engine technologies will never make it to market without the vehicle system meeting emissions regulations. But this is not the first instance where significant emissions control advances were needed to transition a combustion technology to market. Advances in catalyst technologies more than 40 years ago were critical to meeting emerging emissions regulations; the effectiveness of catalysts for conventional spark-ignition engines has since improved by a factor of 100 while achieving a substantial reduction in expensive platinum group metals. Meeting the new challenges is a very active area of research at ORNL and other U.S. Department of Energy national laboratories, as well as in industry.
By Marthe Mathilde. Electrical Wiring. Published at Thursday, January 25th 2018, 01:51:19 AM. Some old homes were designed to run off less power than the modern home. Most states have a 100 amp minimum requirement. Homes running under that service could consider an upgrade to bring them to between 100 and 200 amps, which could run upwards of $2,000. Homeowners should evaluate their power demands first. “A homeowner can have an electrician test the system with an amp meter while all the big loads are on,” says Holt. “If the draw is over 75-80 percent of the service size, you might consider an upgrade. Otherwise you should be fine.”
By Morgane Seraphine. Electrical Wiring. Published at Thursday, January 25th 2018, 00:24:07 AM. Separate the circuit wires at the existing splice and loosen the cables as needed to make room for the new junction box. Mount the box to the framing (or other support structure) with screws driven through factory-made holes in the back or side of the box, as applicable.
By Faustine Arnaud. Electrical Wiring. Published at Wednesday, January 24th 2018, 23:59:26 PM. One of the main trends in the further industrialization of electrical installation work is the use of large-scale electrical engineering facilities, for example, the rooms of electric-drive control stations and of urban transformer substations. Such facilities are delivered by industry with the electrical equipment completely installed and adjusted. In this case, electrical installation work is reduced to the installation of such facilities and the connection of the facilities to external power networks.
By Olivier Danielle. Engine Wiring. Published at Wednesday, January 24th 2018, 23:40:06 PM. In the 16th century, inventors created a form of internal combustion engine using gunpowder as the fuel to power the movement of the pistons. Actually, it wasn’t the gunpowder that moved them. The way this early internal combustion engine worked was you’d stuff a piston all the way to the top of a cylinder and then ignite gunpowder beneath the piston. A vacuum would form after the explosion and suck the piston down the cylinder. Because this engine relied on the changes in air pressure to move the piston, they called it the atmospheric engine. It wasn’t very efficient. By the 17th century, steam engines were showing a lot of promise, so the internal combustion engine was abandoned.
By Faustine Arnaud. Engine Wiring. Published at Wednesday, January 24th 2018, 23:29:09 PM. Automakers can improve fuel economy by selecting optimal coolant-circuit architectures, heat exchangers, and flow-control devices. The goal of this work was to warm up the drivetrain oils rapidly and run at a slightly higher temperature without additional hydraulic power. Kevin Laboe, who leads the Powertrain Thermal Management Team at Chrysler's Advanced Powertrain Group, Detroit, MI, and who led the simulation and testing teams, says the challenge was to distribute the heat in the most effective way.
By Olivier Danielle. Engine Wiring. Published at Wednesday, January 24th 2018, 20:33:18 PM. From my position at Oak Ridge National Laboratory, I have been able to see the intersection of knowledge discovery, advanced engine and vehicle technology development, and the use of one-of-a-kind computing resources. Although the public tends to think of automobile and engine research as a purely private-sector concern, my colleagues and I at ORNL are helping to realize the full efficiency potential of internal combustion engines.
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