Editing Stirling engine (section)

=== Heat exchangers ===
Designing Stirling engine heat exchangers is a balance between high heat transfer with low [[viscosity|viscous]] [[Darcy–Weisbach equation|pumping losses]], and low dead space (unswept internal volume). Engines that operate at high powers and pressures require that heat exchangers on the hot side be made of alloys that retain considerable strength at high temperatures and that don't corrode or [[creep (deformation)|creep]].{{citation needed|date=July 2020}}

In small, low power engines the heat exchangers may simply consist of the walls of the respective hot and cold chambers, but where larger powers are required a greater surface area is needed to transfer sufficient heat. Typical implementations are internal and external fins or multiple small bore tubes for the hot side, and a cooler using a liquid (like water) for the cool side.{{citation needed|date=July 2020}}