Compound type compact heat exchanger core

Abstract

The invention relates to a compound type compact heat exchanger core which comprises end plates, gas heat exchange units and liquid heat exchange units. The gas heat exchange units and the liquid heatexchange units are alternately stacked between the end plates. Flow channel of the liquid heat exchange units are larger than heat exchange channels of the gas heat exchange unit. The compound type compact heat exchanger core has the following beneficial effects that through the arrangement mode that the gas heat exchange units and the liquid heat exchange units are alternately stacked, the flowarea of the channels on one side is increased, so that the blockage problem is avoided when particle impurities exist in a working medium, and the service life of a heat exchanger is prolonged; and meanwhile, the flow resistance of fluid can be reduced, and the heat exchange effect is enhanced. Each gas heat exchange unit can be formed by stacking multiple layers of micro-channel etched plates sothat when a working medium with poor heat transfer performance flows through the channels of the gas heat exchange units, the heat exchange demand of the working medium can be met, heat can be fully transferred; and the size of the core of the heat exchanger can be reduced under the condition of the same heat exchange power, and the heat exchange efficiency is improved.

Description

technical field [0001] The invention belongs to the field of nuclear technology, and in particular relates to a composite compact heat exchanger core. Background technique [0002] Printed Circuit Heat Exchanger (PCHE) is a high-efficiency and compact heat exchange equipment, which has the advantages of large heat transfer area per unit volume, safe and reliable operation under high temperature and high pressure conditions, and is widely used in Nuclear power, petrochemical industry, electronics industry, refrigeration and air conditioning and other fields. [0003] The flow channel on the traditional PCHE heat exchange plate is formed by photochemical etching technology to form a millimeter-scale semicircular cross-section channel. The heat exchange plates on the cold side and the hot side are stacked alternately, and the core of the heat exchanger is formed by diffusion welding. The same or different kinds of cold and hot fluids flow in the semicircular channel and exchan...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects existing in the prior art, the object of the present invention is to provide a composite compact heat exchanger core, the technical solution has a strong heat exchange capacity, can be applied to the fluid medium with entrained particles, and avoids the need for fluid medium Problems with clogging in the flow of compact heat exchangers

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