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Renault Trucks: As a part of the All For Fuel Eco Initiative, Renault Trucks studies a Rankine system for long distance vehicles that could lead to 10% fuel savings. [7] The goal is to produce enough energy to feed the components and electronic auxiliaries with electricity and reduce the fuel consumption by reducing the load on the alternator. [8]
Proper thermal design does not require an upsized cooling system. The added weight of ATEGs causes the engine to work harder, resulting in lower gas mileage. Most automotive efficiency improvement studies of ATEGs, however, have resulted in a net positive efficiency gain even when considering the weight of the device. [22]
Cars and trucks using direct air cooling (without an intermediate liquid) were built over a long period from the very beginning and ending with a small and generally unrecognized technical change. Before World War II, water-cooled cars and trucks routinely overheated while climbing mountain roads, creating geysers of boiling cooling water. That ...
Consider two cooling systems that are otherwise similar, operating at an ambient air temperature of 20 °C. An all-liquid design might operate between 30 °C and 90 °C, offering 60 °C of temperature difference to carry away heat. An evaporative cooling system might operate between 80 °C and 110 °C.
A very well-designed and built steam locomotive used to get around 7-8% efficiency in its heyday. [21] The most efficient reciprocating steam engine design (per stage) was the uniflow engine, but by the time it appeared steam was being displaced by diesel engines, which were even more efficient and had the advantages of requiring less labor ...
The Nissan Sentra proves that affordable and efficient cars don't have to look dorky. It's powered by a 149-hp 2.0-liter inline-four and continuously variable automatic transmission (CVT).
Most modern internal combustion engines are cooled by a closed circuit carrying liquid coolant through channels in the engine block and cylinder head. A fluid in these channels absorbs heat and then flows to a heat exchanger or radiator where the coolant releases heat into the air (or raw water, in the case of marine engines).
Geothermal Heat Pumps: These systems utilize the constant temperature of the earth to boost efficiency and reduce the operational costs of heating and cooling systems. Geothermal solutions are ...
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