Abstract
Since a solid-state heat engine using a shape memory alloy (SMA) works at the temperature difference of several ten degrees, the development of the SMA-heat engine to use the low-temperature thermal energy below 373 K is greatly expected from a view-point of global warming prevention. The working principle of the SMA-heat engine is discussed based on the recovery stress of the SMA. The working principle and traveling speed of a solar-powered car using a simple pulley SMA-heat engine are investigated.
