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Energy Conservation Applications
Published in Mary K. Theodore, Louis Theodore, Introduction to Environmental Management, 2021
Mary K. Theodore, Louis Theodore
Some key suggestions regarding lighting include: If one prefers incandescent bulbs, try to use “energy saver” bulbs. These bulbs use halogen gases that allow the filament to burn brighter while consuming less electricity. According to the U.S. Department of Energy, the most popular light bulbs available are halogen incandescents, compact fluorescent lamps, and light-emitting diodes (LEDs). Although they can initially cost more than traditional incandescent bulbs, during their lifetime they save money because they use less energy.Lighting controls or “timers” can help save energy dollars.Consider using task lighting (lighting directed at a specific area) instead of overhead or general lighting, which may light unused area of the room.
Future of Ferroelectric Devices
Published in Kenji Uchino, Ferroelectric Devices, 2018
Let us consider Toshiba light bulbs. Toshiba is one of the largest light bulb suppliers in Japan, where some of my former graduate students are working. Light bulbs typically have an average lifetime of around 2000 h. Their quality control curve has a standard deviation of ±10% (1800 ~ 2200). If some of the production lots happen to be of a little better quality lifetime of 2400 h, what will happen? A company executive might say bankruptcy of the division. For this kind of mature industrial field, total sales amount is almost saturated, and this 10% longer lifetime translates directly to a 10% decrease in annual income. Therefore, “too high quality” must be eliminated for mass-consumer products. The researcher needs to understand that just seeking high quality is not the only goal of manufacturing company. Of course, Toshiba has the technological capability to extend bulbs’ lifetime. Toshiba does sell 2400 h lifetime bulbs. However, the price is exactly 10% higher than the usual 2000 h bulbs.
Vehicular And Marine Lighting
Published in Randall Noon, Introduction to Forensic Engineering, 2020
One of tungsten’s attributes, with respect to light filaments, is that it has the highest melting point of all the metals - 6,170 degrees Fahrenheit. It is electrically conductive and can be drawn into a fine wire. This combination of characteristics makes it an excellent material for incandescent light filaments. In an incandescent light bulb, electric current passes through the filament and causes it to heat up enough to emit visible light. Unlike most metals, tungsten has melting point higher than the temperatures at which incandescence occurs, which varies between 4,000 and 5,500 degrees Fahrenheit.
What is wrong with energy efficiency?
Published in Building Research & Information, 2018
Establishing energy efficiency as a meaningful topic requires a series of quite deliberate ‘purifying’ moves in which boundaries are constructed as a precondition for the construction of facts. As Latour puts it, ‘we know the nature of facts because we have developed them under circumstances of our complete control’ (Latour, 1993, p. 18). Sure enough, discourses of efficiency define their own terms: they specify what is to be included and what is left out. Filtering out ‘extraneous’ matters, which might range from the history of the service in question (e.g. the history of comfort) through to the possibility that such a service might be defined and experienced in multiple ways, is an essential precondition for the systematic analysis of relative efficiency. Calculations of efficiency are ‘pure’ and, in Latour’s terms, ‘modern’ in the sense that their parameters are known. A more energy-efficient light bulb is thus one that delivers more lumens per watt than its rival. A more energy-efficient house is one that needs less energy to maintain the same temperature than the one next door.