Thin-Film Steam Generators of Binary Geothermal Power Plants

Cover Page


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription or Fee Access

Abstract

BACKGROUND: The cost of electricity generated by a geothermal power plant is twice as low as that of energy sources. However, at present, geothermal power plants mainly use submersible-type apparatus, and the most promising thin-film steam generators have not been sufficiently investigated.

AIM: The purpose of this work is to show the advantages of a thin–film steam generator in comparison with an immersion type heat exchanger.

MATERIALS AND METHODS: The basis for this publication is the experimental research of the author and the analysis of data cited in the literature on heat exchange during the boiling of a film irrigating a bundle of finned pipes.

CONCLUSIONS: The use of thin-film steam generators will significantly reduce the amount of expensive refrigerant in a geothermal power plant circuit. With a cocurrent flow of steam and liquid, the ingress of large drops onto the surface of a superheater tubes is excluded. The use of finned tubes in a bundle with optimal finning parameters ensures a uniform irrigation. The artificial centers of vaporization of the finned tube repeatedly intensify the heat transfer during film boiling, which ultimately leads to a reduction in the weight and dimensions of the superheater.

Full Text

Restricted Access

About the authors

Ivan I. Gogonin

Kutateladze Institute of Thermophysics of SB RAS

Author for correspondence.
Email: gogonin@itp.nsc.ru
ORCID iD: 0000-0001-8914-5860

Dr. Sci. (Tech), Prof., Principal Researcher

Russian Federation, Novosibirsk

References

  1. Butuzov VA, Tomarov GV. Geothermal energy of Kamchatka. Teploenergetika. 2020;11:50–63. doi: 10.1134/S0040363620110041 (in Russ).
  2. Moskvicheva VN, Petin YuM. Results of experimental work at the Paratunskaya freon power plant. In: The Use of Freons in Power Plants. Novosibirsk: IT SO AN SSSR; 1973. P:3–12. (In Russ).
  3. Kutepov AM, Sterman LS, Styushin NG. Hydrodynamics and Heat Transfer during Vaporization. Moscow: Vysshaya shkola; 1986. (in Russ).
  4. Kutateladze SS, Sorokin YuL. On the hydrodynamic stability of some gas-liquid systems. In: Problems of heat transfer and hydraulics of two-phase media. Moscow, Leningrad: GEI; 1961. P. 315–344. (In Russ).
  5. Maltsev LI, Balakleevsky YuI. Flat liquid jets. Teplofizika i aeromekhannika. 2000;3:217–224. (In Russ).
  6. Roques J-F, Thomee JR. Falling Films on Arrays of Horizontal Tubes with R134a, Part I: Boiling Heat Transfer Results for Four Types of Tubes. Heat Transfer Engin. 2007;28(5):398–414. doi: 10.1080/01457630601163736
  7. Fujita J, Tsatsui M. Experimental and analytical study of evaporation heat transfor in falling films on horizontal tubes. In: Proc. of 10th Int. Heat Transter Conf. Vol. 6. Brighton UK. 1994. P:175–180. doi: 10.1615/IHTC10.5470
  8. Gogonin II, Kabov OA. Influence of liquid capillary retention on heat transfer during condensation on finned tubes. Izvestiya SO AN SSSR, ser. tekh. nauk. 1983;2(8)3-8. (In Russ).
  9. Bressler RJ, Wyatt PW. Surface wetting through Capillary Grooves. ASME J. Heat and Mass and Transfer. 1970;92(1):126–132. doi: 10.1115/1.3449605
  10. Akesjö A, Gourdon M, Vamling L, et al. Experimental and numerical study of heat transfer in a large-scale vertical falling film pilot unit. Int. J. Heat and Mass Transfer. 2018;125:53–65. doi: 10.1016/j.ijheatmasstransfer.2018.04.052
  11. Isachenko VP, Osipova VA, Sukomel AS. Heat Transfer. Moscow: Energoizdat; 1980. (In Russ).
  12. Gogonin II. Heat Transfer at Nucleate Boiling. Novosibirsk: Nauka SB RAS; 2018. (In Russ).
  13. Wen T, Lu Li, He W, Min Y Fundamentals and applications of CFD technology on analyzing falling film heat and mass exchangers: A comprehensive review. Appl. Energy. 2020;211:114473. doi: 10.1016/j.apenergy.2019.114473
  14. Gogonin II. Experimental Studies of the influence of hydrodynamics on heat transter at evaporation and boiling of film irrigating a bundle of horizontal finned tubes. J. Phys.: Conf. Ser. 2020;1565(1):012049. doi: 10.1088/1742-6596/1565/1/012049
  15. Kuznetsov DV, Pavlenko AN, Chernyavskiy AN, Radyuk AA. Study of the effect of three-dimensional capillary-porous coatings with various microstructural parameters on heat transfer and critical heat flux at pool boiling of nitrogen. J. Phys.: Conf. Ser. 2020;1677:012089. doi: 10.1088/1742-6596/1677/1/012089
  16. Kuznetsov DV, Pavlenko AN, Radyuk AA, et al. Features of heat transfer during pool boiling of nitrogen on surfaces with capillary-porous coatings of various thicknesses. J. Engin. Thermophysics. 2020;29(3):375–387. doi: 10.1134/S1810232820030017
  17. Kuznetsov DV, Pavlenko AN, Volodin OA. Effect of structuring by deformational cutting on heat transfer and dynamics of transient cooling processes with liquid film flowing onto a copper plate. J. Engin. Thermophysics. 2020;29(4):531–541. doi: 10.1134/S1810232820040013
  18. Moiseev MI, Fedoseev A, Shugaev MV, Surtaev AS. Hybrid thermal lattice boltzmann model for boiling heat transfer on surfaces with different wettability. Interfacial Phenomena and Heat Transfer. 2020;8(1):81–91. doi: 10.1615/InterfacPhenomHeatTransfer.2020033929
  19. Gogonin II. The effect of artificial vaporization centers on heat exchange during boiling of the film irrigating a bundle of horizontal finned pipes. Thermophys. Aeromech. 2021;28(5):697–702. doi: 10.1134/S0869864321050103

Supplementary files

Supplementary Files
Action
1. Fig. 1. Drops of liquid on the turbine blades of the first freon power plant (photo by Yu.M. Petin).

Download (203KB)
2. Fig. 2a. Film flow on a bundle of smooth horizontal pipes (photo by Maltsev).

Download (374KB)
3. Fig. 2b. Uniform irrigation of the tube bundle and capillary fluid retention between the fins. ā=0,75; Re1=1000. Liquid flooding of the intercostal cavity in the lower part of the finned cylinder.

Download (122KB)
4. Fig. 3. q – ∆t dependence on the evaporation and boiling of the film. R-21; Re1=1000; ТS=40°C; 1 - smooth pipe; 2 – ribbed pipe, RZ=3–5 µm; 3 – ribbed pipe RZ = 20–30 µm.

Download (54KB)
5. Fig. 4. q – ∆t dependence R-21; ТS=40°C: 1 – smooth pipe Re=600; 2 – Re=1500; 3 – ribbed pipe RZ=20–30 µm , Re=600; 4 – Re=1500.

Download (50KB)
6. Fig. 5. Schematic diagram of a steam generator with a cocurrent steam and film flow. 1 - liquid distributor; 2 - package of pipes; 3 - superheater; 4 - steam outlet.

Download (75KB)

Copyright (c) 2023 Eco-Vector

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies