Capacity-expandable inner fin temperature difference energy converter based on solid-liquid phase change medium

Abstract

The invention discloses a capacity-expandable inner fin temperature difference energy converter based on a solid-liquid phase change medium. The capacity-expandable inner fin temperature difference energy converter comprises a head sealing cover, a tail sealing cover, an expansion rib ring, pressure-bearing pipes, a hose, a pipe plug cap, a threaded sealing cap, a locking nut, a sealing ring, an integrated inner fin assembly, the solid-liquid phase change medium and hydraulic oil. The mode that the expansion rib ring is connected with the multiple pressure-bearing pipes along the axis is adopted, the filling capacity of the solid-liquid phase change medium of a heat exchanger can be expanded, the capacity can be flexibly adjusted according to energy supply and energy consumption requirements, and meanwhile the machining difficulty and cost of the pressure-bearing pipes are reduced; and according to the heat exchanger, the integrated inner fin assembly is additionally arranged, the distance between the inner-layer solid-liquid phase change medium and a boundary temperature field is shortened, the heat transfer heat resistance of the inner-layer solid-liquid phase change medium is reduced, and the heat exchange rate of the heat exchanger is increased.

Description

technical field [0001] The invention belongs to the technical field of ocean temperature difference energy capture and conversion, and specifically relates to a capacity-expandable inner-fin temperature difference energy converter based on a solid-liquid phase change medium. Background technique [0002] The ocean temperature difference refers to the thermal energy that exists between the temperature difference between the warm surface water and the cold deep water in the ocean. It has the advantages of large reserves, small day and night fluctuations, not affected by tides and waves, and only slightly fluctuates with seasonal fluctuations. In recent years, with the development of solid-liquid phase change material technology, ocean thermoelectric heat exchangers based on solid-liquid phase change media have come out. Compared with the traditional marine thermoelectric heat exchanger using gas-liquid phase change medium, the solid-liquid phase change thermoelectric heat exch...

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Problems solved by technology

[0003] However, ocean temperature difference energy is a low-grade energy with low energy density and small seawater temperature gradient.

At present, the heat transfer rate of the ocean temperature difference energy heat exchanger based on the solid-liquid phase change medium is low under the condition of weak sea temperature difference, and the heat transfer process appears hysteresis, which makes it difficult to complete the heat transfer process and the platform movement process synchronously, which interferes with the Execution of Preset Tasks for Underwater Mobile Platforms

[0004] In addition, the ocean temperature difference energy heat exchanger based on solid-liquid phase change medium adopts a single metal tube forming scheme. With the increase of the length-to-diameter ratio of the heat exchanger, the manufacturing difficulty, process and cost of the single metal tube forming scheme A significant increase

At present, the capacity of the phase change medium filled in the heat exchanger is fixed and cannot be flexibly adjusted according to the energy demand of the underwater mobile platform

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