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# Flash Steam Energy Loss

## When flash steam is generated and vented to the surroundings a considerable amount of energy is lost

If a condensate receiver in a steam distribution system is vented to the surroundings, flash steam will be generated and evacuate, and a considerable amount of energy will be lost.

The amount of flash steam generated depends on the initial and final pressure before and after condensate traps for heat exchangers. In the example - calculating generated flash steam - 0.11 kg flash steam is generated per kg condensate from a heat exchanger with 5 bar gauge pressure.

In other words 11% of the condensate is lost to the surroundings and must be replaced by new water feeded to the system.

Feeding more water requires morel heat energy and additional water treatment increasing the total operating cost for the system.

To improve system efficiency, and to reduce operating cost, it is common to limit the flash steam energy loss by using some kind of low pressure flash recovery system where the flash steam condensates in low temperature consumers - like feeding water heat exchangers, air heaters or similar.

## Related Topics

• ### Flash Steam

Generation of flash steam in steam and condensate systems. Thermodynamic fundamentals, heat loss, energy recovery and more.

## Related Documents

• ### Condensate Pipes - Flash Steam Generated

Calculate flash steam generation in condensate pipe lines.
• ### Flash Steam Energy Loss

When flash steam is generated and vented to the surroundings a considerable amount of energy is lost
• ### Flash Steam Energy Loss

When flash steam is generated and vented to the surroundings a considerable amount of energy is lost
• ### Flash Steam Generation - Fundamental Physics

Tutorial to the basic physics behind flash steam generation
• ### Flash Steam Generation - Imperial Units (psig)

When condensate passes steam traps - flash steam is generated.
• ### Flash Steam Generation - SI-units

When condensate leaves the steam traps - flash steam is generated. Amount of flash steam generated at different pressures - kN/m2.
• ### Properties of Saturated Steam - SI Units

Saturated Steam Table with steam properties as specific volume, density, specific enthalpy and specific entropy.
• ### Saturated Steam - Properties - Imperial Units

Steam table with sensible, latent and total heat, and specific volume at different gauge pressures and temperatures.
• ### Steam Flash Generation (bar)

The amount of flash steam generated depends on steam pressure and pressure in the condensate lines.

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## Citation

• The Engineering ToolBox (2004). Flash Steam Energy Loss. [online] Available at: https://www.engineeringtoolbox.com/flash-steam-energy-loss-d_676.html [Accessed Day Month Year].

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6.3.17

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