THE working of exercises forms a very important part of the course work of an engineering student. Many of the exercises required for the purpose of elucidating the subject of heat and heat engines ...

A nanometre-scale engine without any moving parts can convert heat into electricity with an efficiency close to the limit dictated by thermodynamics. Heat engines harness the flow of heat from a hot ...

Scientists are working on a heat engine that consists of just a single ion. Such a nano-heat engine could be far more efficient than, for example, a car engine or a coal-fired power plant. Scientists ...