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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]
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 temperature of the cooling air may range from well below freezing to 50 °C. Further, while engines in long-haul boat or rail service may operate at a steady load, road vehicles often see widely varying and quickly varying load. Thus, the cooling system is designed to vary cooling so the engine is neither too hot nor too cold.
Can be driven directly using mechanical energy (water, car or truck motor) or with electrical energy. Efficient up to 60% of Carnot's theoretical limit (as evaluated in ASHRAE testing conditions: evaporation temperature of −23.3 °C, condensing temperature of 54.4 °C, and ambient temperature of 32 °C) [citation needed] based on some of the ...
Applications of the Stirling engine range from mechanical propulsion to heating and cooling to electrical generation systems. A Stirling engine is a heat engine operating by cyclic compression and expansion of air or other gas, the " working fluid ", at different temperature levels such that there is a net conversion of heat to mechanical work .
A typical automotive cooling system comprises: a series of galleries cast into the engine block and cylinder head, surrounding the combustion chambers with circulating liquid to carry away heat; a radiator, consisting of many small tubes equipped with a honeycomb of fins to dissipate heat rapidly, that receives and cools hot liquid from the engine;
Cooling is required to remove excessive heat—high temperature can cause engine failure, usually from wear (due to high-temperature-induced failure of lubrication), cracking or warping. Two most common forms of engine cooling are air-cooled and water-cooled. Most modern automotive engines are both water and air-cooled, as the water/liquid ...
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]
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