An Adaptive Diverter Pipe for Central Heat Exchangers

Abstract

The invention discloses an adaptive shunting pipeline for a centralized heat exchanger. The adaptive shunting pipeline comprises an outer pipe and an inner pipe; the outer pipe comprises a transitionpipe and a first pipe body connected with the transition tube; the inner pipe comprises a movable pipe, wherein at least part of the movable pipe is accommodated in the transition pipe; the movable pipe is connected with a second pipe body and can slide on the second pipe body; and meanwhile, according to configuration of the shape of an inner cavity of the transition pipe, when the movable pipe moves in the direction away from an inlet of the transition pipe under the effect of a water flow input into the transition pipe, the sectional area of a channel opening between the transition pipe andthe inner pipe is increased with increasing of the distance from the inlet of the transition pipe to the movable pipe. The water flow rate of a channel (an outer channel) between the transition pipeand the inner pipe is quickly increased with increasing of the input total water flow rate, and the water flow rate in a channel (an inner channel) in the inner pipe is slowly increased with increasing of the input total water flow rate.

Description

technical field [0001] The invention relates to the field of pipelines, in particular to an adaptive flow distribution pipeline for a centralized heat exchanger. Background technique [0002] The condenser is the key equipment of the ship's power system. There are multiple cooling systems on the ship. Different cooling systems may correspond to different fluid media, and the final cold source of these cooling systems is sea water. Centralized cooling design for these systems The obtained concentrated heat exchanger can effectively reduce the number and volume of the condenser, and improve its application value. [0003] In the centralized heat exchanger, the fluid media of different cooling systems need to pass through different heat exchange areas, and the required cooling loads are different under different working conditions, and their changing trends are also different. Therefore, seawater needs to be transported from upstream to There are multiple heat exchange areas i...

AI Technical Summary

Problems solved by technology

[0004] However, the seawater side inlet of the existing heat exchanger adopts a traditional connection method, and the inlet area of ​​the inner heat exchange area and the outer heat exchange area is fixed, resulting in a fixed seawater flow ratio between the inner heat exchange area and the outer heat exchange area.

Under low speed conditions, the heat transfer loads of the inner heat exchange area and the outer heat exchange area are similar, and the demand for seawater flow is also similar. Therefore, the heat exchange area of ​​the inner heat exchange area and the outer heat exchange area must also be similar, which will lead The area of ​​the heat exchange area is larger, which further leads to an increase in the volume and weight of the heat exchanger; at the same time, under high speed conditions, the total seawater flow rate increases, which will bring about a synchronous increase in the seawater flow rate in the inner heat exchange area, far exceeding If the actual required cooling load of the inner heat exchange area is exceeded, it will lead to overcooling of the cooling system and bring adverse effects to the equipment

[0005] Therefore, the traditional connection method of the existing centralized heat exchanger at the seawater inlet will not be able to meet the different demands for seawater flow in the inner heat exchange area and the outer heat exchange area under operating conditions such as low speed and high speed. Centralized heat exchangers cannot realize that the seawater flow ratio in the inner heat exchange area / outer heat exchange area decreases with the increase of the total flow

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