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Passive residual heat removal heat exchanger testing device

A passive waste heat and test device technology, applied in cooling devices, nuclear power generation, climate sustainability, etc., can solve problems such as the inability to carry out horizontal section heat transfer test research, the accuracy and reliability of heat transfer test data, etc. Achieve the effect of shortening test preparation time, avoiding stress deformation, and reducing water consumption

Active Publication Date: 2015-09-30
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the test device established by Westinghouse, the heat transfer tube only includes the vertical section, and the heat transfer test of the horizontal section cannot be carried out on this device.
At the same time, the heat transfer tube of the test device is made of 304 stainless steel tube, while the material of the heat transfer tube in AP1000 is Inconel 690. The thermal conductivity difference between the two materials is about 34%, which will affect the heat transfer test data. affect the accuracy and reliability of

Method used

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  • Passive residual heat removal heat exchanger testing device
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  • Passive residual heat removal heat exchanger testing device

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Such as figure 1 As shown, the passive waste heat removal heat exchanger test device includes heat transfer test section 1, voltage stabilizer 2, shielded pump 3, heater 4, circulation pump 5, heat exchanger 6, high-level water tank 7, low-level water tank 8, lift Pump 9, replenishment pump 10 and spray pump 11. Among them, the test section 1, the voltage stabilizer 2, the shielded pump 3, and the heater 4 constitute the main circuit system of the test device.

[0032] When the fluid flows through the heater 4 in the main circuit, the temperature rises and the density drops, so it flows upwards into the heat transfer test section 1 . In the heat transfer test section 1, the main circuit fluid is cooled and its density increases, so it flows downward, flows out of the test section, and returns to the heater 4 through the main circuit pipe. Th...

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Abstract

The invention relates to a passive residual heat removal heat exchanger testing device which comprises a heat transfer testing section, a voltage stabilizer, a shield pump, a heater, a circulation pump, a heat exchanger, a high-level water tank, a low-level water tank, a lifting pump, a water supplying pump and a spraying pump, wherein the heat transfer testing section, the voltage stabilizer, the shield pump, and the heater form a main loop system of the testing device; the heat transfer testing section comprises 3 C-shaped heat transfer pipes and a cooling water tank; the voltage stabilizer is connected with an outlet pipeline of the heat transfer testing section and an inlet pipeline of the shield pump; the shield pump is connected with the outlet pipeline of the heat transfer testing section; the flowing amount of a main loop is adjusted by adjusting a valve and a bypass valve in front of the shield pump; the heater is arranged between the shield pump and the heat transfer testing section. According to the device, the forms, sizes and materials of the heat transfer pipes are designed reasonably, so that the stress deformation problem can be reasonably avoided, the water use amount can also be greatly reduced, the heat transfer process can be simulated relatively accurately, and relatively accurate heat transfer data can be obtained.

Description

technical field [0001] The invention specifically relates to a test device for a passive waste heat discharge heat exchanger. Background technique [0002] Passive waste heat removal heat exchanger (PRHR HX) is an emergency core cooling system in AP1000 of the third-generation pressurized water reactor nuclear power plant, which plays an important role in alleviating heat sink loss accidents. The passive waste heat removal heat exchanger is mainly composed of heat transfer tubes and refueling water tanks in the containment. The fluid in the hot section of the reactor coolant system flows into the heat transfer tubes and is cooled by the water in the refueling water tank, thereby removing the decay heat of the core. Due to the density difference between the coolants of different temperatures, a natural circulation is formed in the heat exchanger. [0003] The two-phase flow heat transfer phenomenon of the passive waste heat removal heat exchanger in the natural circulation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18G21C17/00
CPCG21C15/18G21C17/00G21C17/02Y02E30/30
Inventor 陈玉宙段明慧吕玉凤李伟卿毕可明王炜王含
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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