Prediction of recirculation flow rate for icing prevention in water intake supply systems of nuclear power plants

Halilovič, Miroslav (avtor), Urevc, Janez (avtor), Koc, Pino (avtor)

During winter conditions, water intake structures represent one of many critical parts of hydraulic structures. Frazil ice deposits, accumulates and adhere to trash racks that can, in severe circumstances, completely prevent the water from entering the intake structure. One of the possible ways to cope with frazil ice blockage is by using waste heat of the discharge water, where a portion of the pumped water is recirculated back via a feedback loop to the intake structure. The recirculated water, serving as a heat source, can then somewhat warm the intake water and indirectly the air in the intake structure. In this work, an equation is derived that predicts the temperature of pumped water as a function of the recirculated-to-pumped water ratio and a case study on treating a water intake structure in a nuclear power plant is presented. The example demonstrates that, with a proper ratio between the pumped and recirculated flow rate, the formation of frazil ice and atmospheric icing could both be prevented.

• Jezik: Angleški jezik
• Ključne besede: water intakes, hydraulic structures, cold weather conditions, frost prevention
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Leto izida: 2019
• Št. strani: Str. 63-70
• Številčenje: Vol. 161
• PID: 20.500.12556/RUL-160887-19ac2ea1-1907-3686-bdbe-b94ca491c611
• UDK: 621.22(045)
• ISSN pri članku: 0165-232X
• DOI: 10.1016/j.coldregions.2019.02.013
• COBISS.SI-ID: 16512283
• Datum objave v RUL: 05.09.2024

Gradivo je del revije

• Naslov: Cold regions science and technology
• Skrajšan naslov: Cold reg. sci. technol.
• Založnik: Elsevier
• ISSN: 0165-232X
• COBISS.SI-ID: 34862341

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: vodno zajetje, hidravlične konstrukcije, preprečevanje zmrzali

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0263
• Naslov: Mehanika v tehniki