A Test System for Heat Transfer and Flow Characteristics of Multiple Hydrocarbon Mixed Refrigerant Heat Exchangers

Abstract

The invention relates to a system for testing heat transfer and flow characteristics of a multi-hydrocarbon mixed refrigerant heat exchanger. The system comprises a mixed refrigerant proportion unit, a mixed refrigerant circulation loop, a hot water circulation loop and a cooling water circulation loop, and mainly comprises hydrocarbon material tanks, a mixed refrigerant vaporizer, a proportioning tank, a gas component analyzer, a compressor, a vacuum pump, a cold water tank, a hot water tank, cold water circulating pump, a hot water circulating pump, a cooling tower, a measuring meter and the like. Hydrocarbon materials are heated and vaporized by a proportion according to requirements of test conditions and then sent to the proportioning tank, analysis is performed on components of a mixed refrigerant at an outlet of the proportioning tank through the gas component analyzer, the dose of the initially filled hydrocarbon materials is corrected, and the test condition satisfying mixed refrigerant is pressurized through the compressor, then forms a mixed refrigerant of a test prototype and completes heat exchange with circulating cooling water from the cooling water tank. The testing system provided by the invention realizes accurate proportioning of the mixed refrigerant, and actual operating conditions of the mixed refrigerant heat exchanger are reproduced. Meanwhile, the testing system has a flow regulating function and can satisfy test conditions under different flow and pressure conditions.

Description

technical field [0001] The invention relates to a thermal performance test system of a heat exchanger, in particular to a test system for heat transfer and flow characteristics of a heat exchanger with multiple hydrocarbon mixed refrigerants. Background technique [0002] In recent years, with the rapid growth of energy demand, the shortage of coal and oil, and the resulting environmental pollution and ecological damage, controlling pollutant emissions, protecting the ecological environment, and achieving sustainable development have become an inevitable choice for countries all over the world. As a high-quality clean energy, natural gas has broad application prospects in energy, transportation and other fields, and has become the product of choice for optimizing the energy structure of countries all over the world. At present, the development of oil and gas fields in the South China Sea has become an important energy route in my country. Since the origin of natural gas is f...

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Problems solved by technology

[0004] As the key equipment in the natural gas liquefaction process, the mixed refrigerant heat exchanger is mainly used for cooling / condensing multi-stage compression medium (mixed refrigerant), which has the characteristics of large load and large impact on energy consumption. The process and mechanism of condensation and total condensation have not yet been clarified, and the reliability and high-efficiency heat exchange elements have not yet been localized. The research and development of this product is still blank in China, and because it involves sensitive energy security topics, Western developed countries have been conducting technical research on my country. Therefore, research work on key technologies such as heat transfer and flow characteristics, design, and manufacturing of mixed refrigerant heat exchangers needs to be carried out urgently

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