DOI: https://doi.org/10.20535/2521-1943.2018.2.129004

Study of Overhung Pump Performance Considering Thermal Stress

Olha Orel, Viacheslav Khvorost, Anna Fursina, Aleksei Kozlov

Abstract


The object of the study is a centrifugal horizontal single-stage overhung pump that is a part of the steam generator emergency cooldown system and designed to return the steam condensate of the secondary system of NPP to the steam generator during emergency condition. Aimed to justify the pump performance we performed research and evaluated strength of stressed pump under mechanical loads and temperature field by means of 3D model. The change in the running clearance between rotor and stator parts was studied as a time function under unsteady temperature field. The operability of the pump was proved with respect to its strength and allowable running clearances of gap seals as well as it was shown that deformation of pump parts under thermal stress greatly depends on temperature field distribution. It was found that it is necessary to consider heat-transfer process under temperature field stress in order to design high-efficient reliable equipment.


Keywords


single-stage overhung pump; pump performance; running clearance; convective heat-transfer; heat conduction; heat-transfer coefficient; temperature field; displacement field; stresses; temperature deformations;

References


Davidenko, A.K., Rudenko, A.A., Khvorost, V.F. and Gavrylo, I.S. (2013), “Issledovanie rabotosposobnosti mnogostupenchatogo pitatel'nogo nasosa pri vozdeistvii teplovogo udara” [Study of Performance of Multi-Stage Feed-Water Pump Being Under Heat Shock], Visnyk of Sumy State University. Technical Sciences Series, no 4, pp. 17-27.

Elin, A.V., Khvorost, V.F. and Shevchuk, S.N. (2015), “Issledovanie rabotosposobnosti odnostupenchatykh pitatel'nykh nasosov pri vozdeistvii teplovogo udara” [Study of Single-Stage Feed-Water Pumps Being Under Heat Shock], Kompressornoe i energeticheskoe mashinostroenie, vol. 39, no 1, pp. 10-16.

Singer, M. and Johne, T. (2013), “Design of Pump Casings: Guidelines for a Systematic Evaluation of Centrifugal Pump Pressure Boundary Failure Modes and their Mechanisms” Proceedings of the Twenty-Ninth International Pump Users Symposium, Houston, Texas, USA, October 1-3.

Bhawar, P. and Patwardhan, M. (2014), “Design and Analysis of Boiler Feed Pump Casing Working at High Temperature by using Ansys”, International Journal of Science and Research (IJSR), vol. 3, no. 6, June, pp. 2392-2395.

Gavrylo, I.S., Elin, A.V. and Khvorost, V.F. (2014), “Issledovanie effektivnosti okhlazhdeniya kamery tortsovogo uplotneniya termobar'erom v pitatel'nom nasose” [Study of Cooling Efficiency of Mechanical Seal Chamber by Thermal Barrier in a Feed Water Pump], Problemy teorii i praktiki tsentrobezhnykh mashin: monografiya [Problems of Theory and Practice of Centrifugal Machines: Monograph] in Tverdokhleb, I.B., Zagorul'ko, A.V. and Gudkov, S.N. (ed.), Pechatnyi dom «Papirus» Ltd., Sumy, Ukraine, pp. 235-244.

PNAE G-7-002-86 (1989), Normy rascheta na prochnost' oborudovaniya i truboprovodov atomnykh energeticheskikh ustanovok [Strength Calculation Code for Equipment and Pipelines of Nuclear Power Generating Facilities], Gosatomenergonadzor SSSR, Energoatomizdat, Moscow, Russia.

Isachenko, V.P., Osipova, V.P. and Sukomel A.S. (1981), Teploperedacha [Heat Transfer Process], Energoizdat, Moscow, Russia.

Mikheev, M.A. and Mikheeva, I.M. (1977), Osnovy teploperedachi [Heat Transfer Principles], Energiya, Moscow, Russia.

Kulinchenko, V.R. (1990), Spravochnik po teploobmennym raschetam [Handbook of heat-exchange calculations], Tekhnika, Kyiv, Ukraine.

ANSYS 14.5, license agreement 673888.


GOST Style Citations


  1. Давиденко, А.К. Исследование работоспособности многоступенчатого питательного насоса при воздействии теплового удара [Текст] / А.К. Давиденко, А.А. Руденко, В.Ф. Хворост, И.С. Гаврыло // Вісник Сумського державного університету. Серія технічні науки. – 2013. – №4. – С. 17-27.
  2. Елин, А.В. Исследование работоспособности одноступенчатых питательных насосов при воздействии теплового удара [Текст] / А.В. Елин, В.Ф. Хворост, С.Н. Шевчук // Компрессорное и энергетическое машиностроение. – 2015. –  Том 39, №1. – С. 10-16.
  3. Singer, M. Design of Pump Casings: Guidelines for a Systematic Evaluation of Centrifugal Pump Pressure Boundary Failure Modes and their Mechanisms [Text] / Michael Singer, Torsten Johne // Proceedings of the Twenty-Ninth International Pump Users Symposium October 1-3, Houston, Texas. – 2013.
  4. Bhawar, P. Design and Analysis of Boiler Feed Pump Casing Working at High Temperature by using Ansys [Text] / Pravin D. Bhawar, M. B. Patwardhan // International Journal of Science and Research (IJSR). – June 2014. – Vol. 3 no 6.
  5. Гаврыло, И.С. Исследование эффективности охлаждения камеры торцового уплотнения термобарьером в питательном насосе [Текст] / И.С. Гаврыло, А.В. Елин, В.Ф. Хворост // Проблемы теории и практики центробежных машин: монография / Под. ред.: И.Б. Твердохлеба, А.В. Загорулько, С.Н. Гудкова. – Сумы: ООО «Печатный дом «Папирус», ‑ 2014. – С. 235-244.
  6. ПНАЭ Г-7-002-86. Нормы расчета на прочность оборудования и трубопроводов атомных энергетических установок [Текст] / Госатомэнергонадзор СССР. – М.: Энергоатомиздат, 1989. – 525 с.
  7. Исаченко, В.П. Теплопередача [Текст] / В.П. Исаченко, В.П. Осипова. – М.: Энергоиздат, 1981. – 417 с.
  8. Михеев, М.А., Основы теплопередачи [Текст] / М.А. Михеев, И.М. Михеева – М.: Энергия, 1977. – 44 с.
  9. Кулинченко, В.Р. Справочник по теплообменным расчетам [Текст] / В.Р. Кулинченко – К.: Техника, 1990. – 165 с.
  10. ANSYS 14.5, лицензионное соглашение 673888.