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CN-121973923-A - Ship circulating cooling system

CN121973923ACN 121973923 ACN121973923 ACN 121973923ACN-121973923-A

Abstract

The invention provides a ship circulating cooling system which comprises a steam generator, a condensation heat exchanger and a water level regulating pipe, wherein the condensation heat exchanger is provided with a hot side cavity and a cold side cavity, the hot side cavity is communicated with the steam generator, the water level regulating pipe is communicated with the bottom of the hot side cavity, a movable sealing piston is arranged in the water level regulating pipe, the interior of the water level regulating pipe is divided into an upper air chamber and a lower liquid chamber by the sealing piston, the lower liquid chamber is communicated with the hot side cavity, and the ship circulating cooling system drives the sealing piston to move in the water level regulating pipe based on pressure change in the steam generator, so that the heat exchange area of the condensation heat exchanger is regulated by changing the liquid level in the hot side cavity, and the cooling capacity of the condensation heat exchanger is dynamically regulated. According to the ship circulating cooling system provided by the embodiment of the invention, the liquid level is reduced to increase the effective condensation area when the heat load is higher, and the liquid level is lifted to reduce the condensation area when the heat load is reduced, so that the adaptability of the ship circulating cooling system is improved.

Inventors

  • WANG GONGQING
  • SONG PING
  • HE TAO
  • DAI LU
  • LIU YONG
  • ZHAO ZHENXING
  • KE HANBING
  • LIU ZIPING
  • LIU YONGCHAO
  • ZHANG ZHI
  • MA CAN
  • Wu Muyun
  • CHEN LIE
  • Xu Guangzhan
  • YANG XIAOHU

Assignees

  • 中国船舶集团有限公司第七一九研究所

Dates

Publication Date
20260505
Application Date
20260115

Claims (10)

  1. 1. A circulating cooling system for a ship, comprising: A steam generator (1); a condensing heat exchanger (2) having a hot side chamber (21) and a cold side chamber (22), said hot side chamber (21) being in communication with said steam generator (1), The water level regulating pipe (3) is communicated with the bottom of the hot side cavity (21), a movable sealing piston (31) is arranged in the water level regulating pipe (3), the sealing piston (31) divides the interior of the water level regulating pipe (3) into an upper air chamber (32) and a lower liquid chamber (33), and the lower liquid chamber (33) is communicated with the hot side cavity (21); The ship circulating cooling system drives the sealing piston (31) to move in the water level adjusting pipe (3) based on pressure change in the steam generator (1), and adjusts the heat exchange area of the condensation heat exchanger (2) by changing the liquid level height in the hot side cavity (21), so that the cooling capacity of the condensation heat exchanger (2) is dynamically adjusted.
  2. 2. The ship circulation cooling system of claim 1, wherein the ship circulation cooling system comprises: and a gas pipe (4) which is communicated with the upper gas chamber (32) and is used for adjusting the gas quantity in the upper gas chamber (32).
  3. 3. The ship circulation cooling system of claim 1, wherein the ship circulation cooling system comprises: the condenser pipe (5) is communicated with the bottom of the steam generator (1) and the bottom of the hot side cavity (21), and the check valve (6) is arranged on the condenser pipe (5) so as to prevent fluid from flowing from the steam generator (1) to the hot side cavity (21).
  4. 4. The ship circulation cooling system of claim 1, wherein the ship circulation cooling system comprises: And a steam pipe (7) for communicating the top of the steam generator (1) with the top of the hot side cavity (21).
  5. 5. The ship circulation cooling system according to claim 1, characterized in that the bottom of the water level adjustment pipe (3) communicates with the bottom of the hot side chamber (21) through a connecting pipe (8).
  6. 6. A ship circulation cooling system according to claim 2, characterized in that the gas pipe (4) is provided with a gas valve for charging or discharging gas into or from the upper gas chamber (32).
  7. 7. A ship circulation cooling system according to claim 2, characterized in that the gas pipe (4) communicates with a gas reservoir.
  8. 8. The ship circulation cooling system according to claim 1, characterized in that a sealing ring is sleeved on the outer peripheral wall of the sealing piston (31), and the sealing ring is used for sealing a gap between the sealing piston (31) and the inner wall of the water level regulating pipe (3).
  9. 9. The ship circulation cooling system of claim 1, wherein the ship circulation cooling system comprises: and a safety valve is arranged on the steam generator (1) and/or the condensing heat exchanger (2).
  10. 10. The hydronic system of claim 6, wherein the air valve is a solenoid valve.

Description

Ship circulating cooling system Technical Field The invention relates to the technical field of ship cooling systems, in particular to a ship circulating cooling system. Background When the ship power system encounters an accident condition, a large amount of waste heat which is difficult to immediately dissipate is generated, and the heat is continuously led out by means of a steam-condensate passive cooling system so as to ensure the safety of a reactor or a power device. In the related art, the steam-condensate passive cooling system has a problem in that its overall cooling capacity is highly dependent on the initial water charge of the system. To ensure that the steam generator does not "dry pan" during long operation or certain conditions, the system is typically designed with a high initial water charge. This results in that in the initial stage of accident, when the heat source power reaches the peak value, the effective condensing section length of the condensing heat exchanger is relatively short due to the high initial liquid level of the system, the actual cooling capacity is often insufficient to cope with the instantaneous high heat load, and the abnormal rise of the pressure in the system is easily caused, which poses a threat to the safety of the system. Conversely, if the initial water loading is too low, the initial cooling capacity can be increased, but the risk of "dry pot" occurs. Disclosure of Invention The invention provides a ship circulating cooling system, which is used for solving the defects that the cooling capacity is limited by the initial water content and cannot be dynamically adjusted along with the change of the heat source power in the prior art and realizing the automatic adjustment of the heat exchange area of a condensing heat exchanger. The invention provides a ship circulating cooling system, which comprises: A steam generator; a condensing heat exchanger having a hot side chamber and a cold side chamber, the hot side chamber being in communication with the steam generator, The water level regulating pipe is communicated with the bottom of the hot side cavity, a movable sealing piston is arranged in the water level regulating pipe, the sealing piston divides the interior of the water level regulating pipe into an upper air chamber and a lower liquid chamber, and the lower liquid chamber is communicated with the hot side cavity; The ship circulating cooling system drives the sealing piston to move in the water level adjusting pipe based on pressure change in the steam generator, and adjusts the heat exchange area of the condensing heat exchanger by changing the liquid level height in the hot side cavity, so that the cooling capacity of the condensing heat exchanger is dynamically adjusted. In some embodiments, the vessel cooling system comprises: and the air pipe is communicated with the upper air chamber and is used for adjusting the air quantity in the upper air chamber. In some embodiments, the vessel cooling system comprises: And the condensate pipe is communicated with the bottom of the steam generator and the bottom of the hot side cavity, and a check valve is arranged on the condensate pipe so as to prevent fluid from flowing from the steam generator to the hot side cavity. In some embodiments, the vessel cooling system comprises: and the steam pipe is communicated with the top of the steam generator and the top of the hot side cavity. In some embodiments, the bottom of the water level adjustment pipe communicates with the bottom of the hot side chamber through a connection pipe. In some embodiments, a gas valve is provided on the gas pipe for filling or discharging gas into or from the upper gas chamber. In some embodiments, the air tube communicates with an air reservoir. In some embodiments, a sealing ring is sleeved on the peripheral wall of the sealing piston, and the sealing ring is used for sealing a gap between the sealing piston and the inner wall of the water level regulating pipe. In some embodiments, the vessel cooling system comprises: and the safety valve is arranged on the steam generator and/or the condensing heat exchanger. In some embodiments, the gas valve is a solenoid valve. According to the ship circulating cooling system provided by the embodiment of the invention, the water level adjusting pipe communicated with the bottom of the hot side cavity is arranged, and the movable sealing piston is arranged in the water level adjusting pipe to form the upper air chamber and the lower liquid chamber, so that the liquid level of the hot side cavity can be automatically adjusted along with the pressure change of the steam generator, the dynamic adjustment of the heat exchange area of the condensing heat exchanger is realized, the liquid level is reduced to increase the effective condensation area when the heat load is higher in the initial stage of an accident, the liquid level is lifted to reduce the condensation area when the heat load is reduce