Low temperature phase equilibrium tester

1) Product Introduction

VLE1000Low temperature phase equilibrium testerBased on the liquid phase single cycle analysis method, it is a professional equipment designed specifically for the determination of gas-liquid equilibrium parameters. Its core is to achieve system equilibrium by forcing two-phase flow through a liquid-phase circulation pump, especially suitable for low boiling point working fluids(Like mixed refrigerants)The research on phase equilibrium can provide key technical support for the development of new working fluids, thermal cycle design, and separation process optimization.

In terms of core performance,VLE100Having the technical capability of measuring range and high measurement accuracy. Temperature measurement range coverage-30-60 °CThe pressure measurement range is up to0.05~4MPaAmong them, the temperature measurement accuracy is better than±0.02℃The temperature control fluctuation is stable at±0.02°CThe accuracy of the pressure sensor reaches0.04%FSAt the same time, the equipment adopts a specially designed measurement system, which can ensure the high uniformity and stability of the temperature field of the mixed sample in the equilibrium kettle, as well as the long-term stability of the mixed system during the testing process, effectively ensuring the accuracy and repeatability of the measurement results.

VLE1000Low temperature phase equilibrium testerIt has an efficient circulation system and a fully automated testing mechanism, with core advantages reflected in experimental efficiency and operational convenience. The experimental system adopts a liquid-phase circulation pump, which can significantly accelerate the achievement of gas-liquid equilibrium in multicomponent mixed systems without disrupting the system balance and maintaining the internal temperature field;The built-in fixed cycle sampling module supports high-precision fixed cycle sampling analysis with multiple injections, short experimental time, stable measurement results, and can be analyzed by connecting to a chromatograph, greatly reducing operational difficulty and further improving the reliability and repeatability of experimental results.

VLE1000Support testing under wide temperature range and high pressure conditions, able to meet diverse experimental needs, and can customize more demanding working conditions according to user requirements, suitable for phase equilibrium research of pure, binary, and ternary systems, and obtain equilibrium statesT，P，X，YFour core parameters can be measured simultaneously, including vapor pressure. With the support of supporting software modules, gas-liquid equilibrium phase diagrams of binary systems can also be generated, providing data visualization support for deep analysis.

2) Main Features

l Accurate temperature control:Temperature fluctuation less than±0.05°C；

l Accurate temperature measurement:High temperature measurement accuracy± 0.02 ℃；

l Accurate pressure measurement:Utilizing high-precision pressure sensors, the measurement uncertainty of the pressure sensor is less than0.04% FS；

l degree of automationHigh:It can achieve automatic temperature control, automatic temperature measurement, automatic pressure measurement, and data processing;

l Short balance time:Built in liquid-phase circulation pump, the system can quickly balance;

l Automatic sampling:It can achieve high-precision quantitative sampling multiple times with one injection.

3) Technical parameters

l Testing principle:Single liquid phase cyclic analysis method；

l pressure range：0.1~4 MPa(Optional with other ranges)；

l Temperature range:-30~60℃；

l Temperature measurement accuracy:superior to±0.01℃；

l Pressure measurement accuracy：0.4 % FS；

l measured value：Temperature at equilibrium stateT, pressurepLiquid phase mole fractionx*Gas phase mole fractiony*four parameters；

l Scope of application：Low boiling point pure substance, binary and ternary systems；

l data transmission：USB

4) Typical Applications

l cryogen:asR32+R1234zeBinary system orR32+R161+R1234zeStudy on the distribution of gas and liquid components in ternary systems under different temperature conditions;

l Chemical synthesis:Measurement of gas-liquid equilibrium data of the toluene propylene binary system as a synthetic raw material at different temperatures and pressures;

l Pharmaceutical Chemistry：acetonitrile-Measurement and study of gas-liquid equilibrium data of ethyl acetate under isobaric conditions.