CONVERSION OF LIQUID TO STEAM. HOW AND WHY?

Georg K. Lavrenchenko; Alexey G. Slinko; Artem S. Boychuk; Serhii V. Kozlovskyi; Vitalii M. Halkin

doi:10.15421/jchemtech.v31i3.285771

Authors

Georg K. Lavrenchenko Institute of Low Temperature Energy Technologies, Ukraine https://orcid.org/0000-0002-8239-7587
Alexey G. Slinko Odessa National Maritime University, Ukraine https://orcid.org/0000-0002-5310-4335
Artem S. Boychuk Odessa National Maritime University, Ukraine https://orcid.org/0000-0003-2783-7129
Serhii V. Kozlovskyi Odessa National Maritime University, Ukraine https://orcid.org/0000-0002-3176-835X
Vitalii M. Halkin Odessa National Maritime University, Ukraine https://orcid.org/0000-0002-7640-5106

DOI:

https://doi.org/10.15421/jchemtech.v31i3.285771

Keywords:

Isobaric and isochoric thermodynamic processes of steam overheating, Steam turbine plant, Power, Thermal efficiency

Abstract

To convert liquid into vapor, static and hydrodynamic methods are used. When using the hydrodynamic method, the transformation of liquid into vapor is realized for a small amount of liquid. This makes it possible to apply the isochoric process of superheating saturated steam. A small amount of liquid is compressed and heated isobarically to saturation temperature. Further, it is supplied in sprayed form to a vertically located surface, the temperature of which, in relation to the supplied liquid, is higher. In this case, the liquid instantly turns into saturated vapor. A surface continuously heated by a hot heat source is placed in a closed volume. It is equipped with valves that regulate the moment and quantity of liquid injected, as well as the final pressure and superheat temperature of the steam. The performance and efficiency of the proposed hydrodynamic method for steam generation with an isochoric process of its overheating has been tested using the example of a thermodynamic cycle of a steam turbine plant with an intermediate overheating of steam with a power of 20000 kW. The initial data on the parameters of the steam entering the turbine blades: pressure 10 MPa, temperature 510 °С, temperature of the intermediate overheating of the steam 500 °С, condensation pressure 0.005 MPa. Comparative calculations have shown that the proposed cycle in terms of the main technical and economic indicators significantly exceeds the classical cycle of steam turbine plants widely used in practice. In addition to numerical indicators that positively characterize the proposed cycle, its design and operational indicators also testify in its favor. So, it lacks a large, massive and structurally complex steam boiler; a more thermodynamically efficient isochoric steam superheating process is used.

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CONVERSION OF LIQUID TO STEAM. HOW AND WHY?

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