Low-temp. two-phase flow gas liquid homogeneous distribution board fin type phase change heat-exchanger

Abstract

The low-temp. two-phase fluid gas-liquid uniformly-distributing plate fin type phase change heat-exchanger is characterized by that its upper portion is equipped with high-temp. gas-phase fluid fin-inducer and low-temp. wet steam fin-inducer, its middle portion is equipped with high-temp. wet steam collecting fin-inducer and collecting lead-out pipe and its lower portion is equipped with low-temp. gas phase fluid uniform distributor and liquid-phase fluid uniform distributor. Its central main body portion is equipped with several layers of plate fin type evaporatino heat-exchange elements andcondensing or cooling heat-exchange elements which are alternatively connected. Firstly, said heat-exchanger can utilize the above-mentioned structure to implement high-effective phase change heat exchange of gas liquid two-phase fluids, and its heat-exchange efficiency is high.

Description

1. Technical field: [0001] The invention relates to a low-temperature two-phase flow gas-liquid evenly distributed plate-fin type phase change heat exchanger, which belongs to the subject field of engineering thermophysics and energy utilization. 2. Background technology: [0002] Plate-fin heat exchangers have been used in the fields of cryogenic technology, air separation and chemical process since the 1950s. They have the advantages of compact structure and high heat transfer coefficient. Because the plate-fin heat exchanger has a large heat transfer area per unit volume, and there are many layers of neatly arranged channels in the core, therefore, each fluid that needs to be exchanged for heat must first pass through a narrow inlet. Enter the numerous channels of each layer in the heat exchanger. Therefore, an effective distribution mechanism must be provided between the inlet of the fluid and each layer of channels in the heat exchanger, so that the fluid can be evenly...

AI Technical Summary

Problems solved by technology

[0006] However, the above techniques still have significant disadvantages

Its main defect is that when the gas-liquid two-phase fluids meet at the inlet head of the heat exchanger, the formed diffuse mist gas-liquid two-phase fluid enters the guide fins, due to its Due to the sharp change of the flow direction, the liquid phase fluid with higher density will be separated from the gas phase fluid again, thus causing the problem of uneven distribution of the gas-liquid two-phase fluid in the channels of each layer.

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