A Passive Safety System to Suppress Water Hammer Induced by Steam Condensation

Abstract

The invention provides a passive safety system for suppressing water hammer induced by steam condensation, which is used to suppress steam condensation water hammer by installing an orifice compartment at the nozzle position of a heat pipe section. The invention adopts the orifice compartment formed by splicing two types of orifice plates, so that the steam generated by the heat exchanger is condensed step by step in the orifice compartment, which fundamentally eliminates the occurrence of steam in the heat pipe section due to severe condensation under low flow rate Condensation induces water hammer. In addition, the orifice compartment prevents direct contact between steam and low-temperature seawater, reduces the condensation heat transfer coefficient, and effectively suppresses water hammer of steam on the seawater side. The invention has the advantages of simple structure, capable of suppressing water hammer caused by steam condensation on the pipeline and seawater side at the same time, and wide application range; at the same time, the invention is convenient and easy to improve, and is convenient for engineering application.

Description

technical field [0001] The invention relates to a passive safety system for suppressing water hammer induced by steam condensation, belonging to the fields of heat transfer and fluid mechanics. Background technique [0002] In the passive safety system of floating nuclear power plants, the ocean usually acts as the final heat sink for absorbing waste heat. Under two-phase conditions, the saturated steam generated by the heat exchanger will inevitably come into direct contact with supercooled seawater. Due to intense condensation, sea water will pour back into the heat pipe. When the steam is surrounded by seawater and forms a vapor plug, the vapor plug condenses rapidly and causes the liquid columns at both ends to collide violently, resulting in water hammer. The occurrence of water hammer will generate a large pressure pulse, and cause the pipeline to oscillate and even destroy the integrity of the system. Due to the condensation-induced water hammer phenomenon caused b...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a passive safety system that suppresses water hammer induced by steam condensation. The system innovatively proposes a design for eliminating water hammer induced by steam condensation, and solves the occurrence of existing systems under high gas content conditions. The problem of steam condensate hammer, broadening the application range of the system

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