Chepak O. P., Kostenko V.K., Zavyalova O.L., Tavrel M.I. Determination parameters of geothermal heat-exchangers for biological treatment facilities

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Geo-Technical Mechanics, 2018, Issue 141

Geoteh. meh. 2018, 141, 61-69

https://doi.org/10.15407/geotm2018.141.061

DETERMINATION PARAMETERS OF GEOTHERMAL HEAT-EXCHANGERS  FOR BIOLOGICAL TREATMENT FACILITIES

¹Chepak O. P., ¹Kostenko V.K., ¹Zavyalova O.L., ¹Tavrel M.I.

¹Donetsk National Technical University MES of Ukraine

UDC 536.242:620.92:622.271

Language: English

Annotation.

To develop methods for calculating thermo-dynamic parameters for geothermal heat-exchangers in the biological treatment facilities and other systems operating on subsoil energy basing on established laws of heat exchange between the rock mass and aquatic environment in the borehole geothermal heat exchangers. Complex approach consisting of analysis of literature sources on issues of heat-and-mass transfer for the heat situation control in treatment facilities; theoretical researches of heat transfer from the rock mass to heat carriers in the borehole geothermal heat exchangers; calculation and analytical method for determining key parameters of technology for intensive restoration of biological diversity of areas disturbed by mining operations with simultaneous purification of quarry waters. The methods are developed for theoretical determination of technical parameters for geothermal heat exchangers used in biological sewage treatment. Laws of heat exchange between the rock mass and aquatic environment are established for the cases when geothermal heat exchangers are used in biological treatment facilities, which have allowed determining key parameters for the heat exchanger including the number of boreholes and their depths for keeping 10⁰C temperature in winter time. Understanding of mechanism of heat exchange between the rock mass and aquatic environment in geothermal heat exchangers was further developed. The methods for determining quantitative parameters for geothermal heat exchangers used in treatment facilities were improved. The method is proposed for increase heat output by more than 5 times and shortening the borehole length by 1.7 times thanks to the heat-transferring layer between the walls of casing pipes and the rock mass. The all-year round control of the required water temperature in biological treatment facilities will provide comfortable conditions for vital functions of hydrobionts and, therefore, dependence of sewage treatment on climatic factors will be decreased.

Keywords:

 geothermal energy, borehole heat-exchanger, heat transfer, heat conduction coefficient, clay and graphite mix.

References

1. Kostenko V., Zavyalova E. L. and Chepak O. P. (2014), “The restoration of biodiversity in mined-out spaces quarries”, Proc. of the international forum-competition of young scientists “Problems of subsoil use”, Saint-Petersburg, pp. 131-133.

2. Stol'berg F. V. (2011), "Low-cost technologies for the ecological restoration of small rivers of Ukraine», Naukovo-tekhnichnyy zbirnyk "Komunalne hospodarstvo mist", vol. 99, pp.253–266.

3. Kostenko V. K., Zavyalova O. L., Box I. V., Spinules O. S., Chepak O. P. and Filatov, I. Yu. Donetsk  National Technical University (2014), Sposіb vidobuvannya geotermalnogo tepla [Method of geothermal heat extraction] State Register of Patents of Ukraine, Kiev, UA, Pat. № 91730

About the author

ChepakOlgaPetrivna, Doctoral Student in the Department of Nature and Environmental Activity, Donetsk National Technical University MES of Ukraine, Pokrovsk, Donetsk Region, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kostenko Viktor Klimentovuch, Doctor of Technical Sciences (D. Sc.), Professor, Head of the Department of Nature and Environmental Activity, Donetsk National Technical University MES of Ukraine, Pokrovsk, Donetsk Region, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Zavyalova Olena Leonidivna, Candidate of Technical .Sciences (Ph. D.), Associate Professor, Associate Professor in the Department of Nature and Environmental Activity, Donetsk National Technical University MES of Ukraine, Pokrovsk, Donetsk Region, Ukraine,   This email address is being protected from spambots. You need JavaScript enabled to view it.

Tavrel Marina Igorevna,Doctoral Student in the Department of Nature and Environmental Activity, Donetsk National Technical University MES of Ukraine, Pokrovsk, Donetsk Region, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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