Сonditions for the appearance of hydraulic shock in solar installation systems

Authors

DOI:

https://doi.org/10.15276/opu.3.56.2018.05

Keywords:

hydraulic shock, solar installation systems, inertia of pumps, hydrodynamic instability

Abstract

Hydraulic shock (HS) in solar installation can significantly affect on their reliability. A method for determining the conditions and
consequences of hydraulic shock caused by aperiodic hydrodynamic instability due to inertia of pump head-flow is presented. Criteria of
conditions of Hydraulic shock when starting pumps in standard circuits of solar installations depending on the delay time of the head-flow
and time to reach a coolant steady state are found. A solution was found for the maximum pressure amplitude under hydraulic shock. Unlike
the well-known Jukowsky formula, it considers the design and technical characteristics of the hydraulic circuit of solar installations, the
inertia of head-flow characteristic of pump, and transition of kinetic energy of coolant stagnation to energy of pressure pulse of hydraulic
shock. Hydraulic shock is a consequence of aperiodic and oscillatory hydrodynamic instability in solar installations. Aperiodic
hydrodynamic instability may occur in transient conditions (for example, starting the pump). Oscillatory hydrodynamic instability may occur
in operating conditions. Hydrodynamic instability is caused by inertia of head-flow characteristic of pumps in both cases. Inertia of headflow characteristic of pumps is mean a time delay of the response of head-flow characteristic of pumps to change the flow hydrodynami parameters. We can use found results to eliminate causes and consequences of HS for operability and reliability of pump designs of solar installations.

Downloads

Download data is not yet available.

References

Skalozubov, V.I., Chulkin, O.A., & Pirkovskiy, D.S. (2018). Overview analysis of the conditions and effects of hydrodynamic impacts on equipment and piping systems important to the safety of nuclear power plants. Nuclear Power and the Environment. 1(11), 37–43.

Ghidaoui, M.S. (2001). Fundamental Theory of Water Hammer. Special Issue of the Urban Water I. 1(2), 71–83.

Skalozubov, V.I., Chulkin, O.A., & Pirkovsky, D.S. (2018). Water hammer due to thermalhydrodynamic instability. LAP Lambert Academic Publishing, 56.

Korolev, A.V., Ishchenko, A.P., & Ishchenko, O.P. (2017). The study of hydraulic shocks when filling the pressure compensation system in WWER. Proceedings of the higher educational institutions. Energy. 5, 459–469.

Guinot, V. Rieman (2002). Solvers for Water Hammer Simulations by Godunov Method. Numerical methods in engineering, 851–870. DOI: https://doi.org/10.1002/1097-0207(20001110)49:7<851::AIDNME978>3.0.CO;2-%23.

Ghidaoui, M.S., Zhau, M., McInnis, D.F., & Axworthy D.H. (2005). A Review of Water Hammer Theory and Practice. Applied Mechanics Reviewz, 58, 49–76.

Korolev, O.V., & Zhou Hui Yu. (2016). Dynamic Damper Pressure Fluctuation in the Pumping Systems. Proceeding of Odessa Polytechnic university, 1(48), 35–41.

Bezrukov, A.Yu., Lisenkov, E.A., & Seleznev, A.V. (2009). Analysis of the possibility of water hammer in the first loop of WWER reactors. OKB Gidropress OJSC: Proceedings of the International Scientific and Technical Conference on improving the safety of nuclear power plants. Podolsk.

Mazurenko, A.S., Skalozubov, V.I., Kozlov, I.L., Pirkovskiy, D.S., & Chulkin, O.A. (2017). Determining the conditions for the hydraulic impacts emergence at hydraulic systems. Problemele energeticii regionale. 2(34), 99–105. Retrieved from: http://journal.ie.asm.md/ru/contents/ electronni_jurnal-234-2017.

Downloads

Published

2018-12-07

How to Cite

[1]
Mohammad, A., Skalozubov, V., Chulkin, O. and Gabalaya, T. 2018. Сonditions for the appearance of hydraulic shock in solar installation systems. Proceedings of Odessa Polytechnic University. 3(56) (Dec. 2018), 48–53. DOI:https://doi.org/10.15276/opu.3.56.2018.05.