ånginträde

Ånginträde is a Swedish term that can be translated to "steam entry" or "steam admission." It is primarily used in the context of steam engines and steam turbines to describe the moment when steam is introduced into a cylinder or turbine casing to do work.

In a reciprocating steam engine, ånginträde refers to the point in the piston's stroke where the inlet valve opens, allowing high-pressure steam to enter the cylinder. This influx of steam pushes the piston, converting the thermal energy of the steam into mechanical energy. The timing of the ånginträde is crucial for the efficient operation of the engine and is controlled by the engine's valve gear.

In steam turbines, ånginträde signifies the point at which steam enters the first stage of the turbine. The steam impinges on the turbine blades, causing them to rotate. The design and positioning of the nozzles that direct the steam are critical for achieving optimal ånginträde and maximizing the turbine's power output.

The concept of ånginträde is fundamental to understanding the thermodynamic cycles and mechanical principles governing steam-powered machinery. It represents the initiation of the working fluid's expansion and energy transfer process. The efficiency and performance of steam engines and turbines are directly influenced by how effectively and at what point the ånginträde is managed.