dampgjennomgangsfart

Dampgjennomgangsfart is a term used to describe the rate at which steam passes through a component or system. It is a key parameter in the design and operation of steam-related equipment such as boilers, steam lines, turbines and condensers. The term is commonly expressed as either mass flow rate (kilograms per second, kg/s) or volumetric flow rate (cubic meters per second, m3/s). When converting volumetric to mass flow, the steam density at the operating pressure and temperature must be taken into account.

In practice, dampgjennomgangsfart is determined through direct measurement with flow meters or inferred from energy balances and process conditions. Common measurement methods include orifice plates, venturi tubes, turbine flow meters and Coriolis meters. For steam that is not single-phase, the dryness fraction (steam quality) also affects the effective throughflow, since the presence of liquid water changes density and enthalpy.

Factors that influence dampgjennomgangsfart include pressure and temperature, phase state (saturated steam versus superheated steam), pipe diameter, resistance losses, and any throttling or expansion devices in the flow path. Changes in the system—such as valve positions, turbine load, or condenser pressure—alter the flow rate to maintain balance with energy input and extraction.

Applications for dampgjennomgangsfart span power generation, process heating, and chemical plants, where accurate control of steam flow is essential for efficiency and safety. Proper sizing and monitoring of steam flow help optimize heat transfer, minimize energy losses, and prevent equipment damage due to excessive or insufficient throughput.