Chernega Leena Andreevna, student of Korolyov college of Space Engineering and Technology (State Educational Institution of Higher Education of Moscow Region «University of technology»)
The engine is based on material with shape memory (nitinol). Chemically nitinol is NiTi, the main elements of the alloy are nickel and titanium in a percentage of 55 % nickel, 45 % titanium. Due to the properties of nitinol it is possible to build an engine with the following features: a belt drive consisting of nitinol links pulleys of different diameters, that is, the gear ratio differs from 1. Further, these pulleys through the transmission of synchronization, which can be achived by a chain or toothed belt, are connected to each other so that their ratio by this tight circuit is one to one. If we start to supply heat, then we start weakening one branch of nitinol ribbon, and the other branch of nitinol tape will stretch during heat removal. This results in torque and the whole system moves – this is the principle of engine operation.
KEYWORDS: heat engine, nitinol, shape memory effect, space technology, Carnot cycle.
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