Device for measuring ebullition characteristic of refrigerant flowing across different arrayed tube bundles

Abstract

Present invention refers to device for testing refrigerant horizontal pipe bundles flow rimming property, belonging to refrigerating technology field. Said invention includes electromagnetism driving gear pump, check valve, mass flowmeter, control valve, electricity preheater, experiment, mixing chamber, condensing heat exchanger, fluid reservoirs, dry filter, viewing mirror, solution pump, refrigeration unit, auxiliary electric heater, and constant-temperature water tank. It adopts electromagnetism drive gear pump as refrigerant loop power supply and secondary refrigerant glycol water to make refrigerant condensation, through regulating refrigerant major loop bypath loop control valve opening to control refrigerant mass flow entering experiment section, regulating electricity preheater heating quantity to control refrigerant dryness entering experiment section, regulating constant-temperature water tank temperature to control refrigerant vaporization temperature. Said invention can accuracy measure refrigerant horizontal pipe bundles flow rimming property in broad parameter range with high precision, simple control, flexible operation, and low cost advantages.

Description

technical field [0001] The invention relates to a device in the technical field of refrigeration, in particular to a device for testing the boiling characteristics of a refrigerant crossing a tube bundle. Background technique [0002] The vapor-liquid two-phase flow boiling across the shell side of the shell-and-tube heat exchanger is one of the heat transfer methods widely used in refrigeration, air conditioning, petrochemical and other industrial fields. A detailed understanding of the flow boiling characteristics is the key to this type of heat exchanger. The basis of design and optimization is also of great significance for energy saving and saving raw materials. Generally, during the flow boiling process of the refrigerant traversing the tube bundle on the shell side of the heat exchanger, the refrigerant vapor-liquid two-phase flow pattern and physical parameters will change greatly, resulting in a relatively large change in the flow boiling mechanism and heat transfer...

AI Technical Summary

Problems solved by technology

The application number is CN200410017005.1, and the invention patent titled "the device for testing the boiling heat transfer characteristics of the refrigerant in the tube" uses an inverter compressor as the power source of the refrigerant circuit, and because a small amount of compressor lubricating oil is mixed into the refrigerant The circuit will have a great impact on the boiling characteristics of the refrigerant. In order to ensure the test accuracy, high-precision multi-stage oil separation equipment must be installed when the compressor is used as the power, which increases the complexity and cost of the test system.

In addition, the method of using the compressor as the power has relatively poor accuracy in controlling the evaporation temperature of the refrigerant, which affects the test accuracy of the heat transfer coefficient.

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