high and low turbine pressures on reheat cycle

CheyPR

CheyPR

@cheypr-t9BMyH • Oct 21, 2024
Hi, I'm trying to figure out why in the reheat cycle on a power plant turbine the water steam is a low pressure vapor after the reheat stage?

is it because of a change in the steam composition? why they are not both high pressure stages if the temperature of the steam is the same in both cases before entering the turbine?
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  • Ramani Aswath

    Ramani Aswath

    @ramani-VR4O43 • Sep 14, 2011

    CheyPR
    Hi, I'm trying to figure out why in the reheat cycle on a power plant turbine the water steam is a low pressure vapor after the reheat stage?
    is it because of a change in the steam composition? why they are not both high pressure stages if the temperature of the steam is the same in both cases before entering the turbine?
    If the steam is in equilibrium with liquid water at the same remperature, then the pressure is fixed. However, if the steam is not in equilibrium with liquid water, it is just a pure gas. This can exist at any combination of temperature and pressure like any other gas (e.g. air)
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