CN104458798A - In-situ test method for high-pressure low-temperature heat conductivity coefficients and heat transfer coefficients - Google Patents

Abstract

The invention discloses an in-situ test method for high-pressure low-temperature heat conductivity coefficients and heat transfer coefficients. The heat conductivity coefficients and the heat transfer coefficients of media are measured based on a point heat source thermistor method. The power of a thermistor is determined, and the heat conductivity coefficient and the heat transfer coefficient of a measured medium are obtained according to the resistance feedback and temperature attenuation data of the thermistor by utilizing a calculation model. The method comprises the following steps: correcting parameters of a thermistor measurement model; slowly extruding a to-be-measured medium by utilizing a piston on the lower part of a reaction kettle, and unifying the standard of to-be-detected samples; introducing reactive gas and controlling the pressure and temperature in a target range; and inputting the determined power value into the thermistor by virtue of a power input control system, acquiring the resistance value and temperature value of the thermistor by utilizing a data acquisition device, and finally, obtaining the heat conductivity coefficient and the heat transfer coefficient by utilizing the calculation model. According to the design of the invention, in-situ synthesis of different media under high pressure and at low temperature can be met, and in-situ measurement of the heat conductivity coefficients and heat transfer coefficients of multi-phase condition substances in different spaces and different time is realized.

Description

The home position testing method of a kind of high pressure low temperature coefficient of heat conductivity, heat transfer coefficient

Technical field

The present invention relates to a kind of home position testing method for high pressure low temperature coefficient of heat conductivity, heat transfer coefficient, belong to heat transfer testing technical field.

Background technology

A kind of relative measurement measuring different medium coefficient of heat conductivity, heat transfer coefficient based on thermistor heat point source measuring system.By the constant voltage dc source supply thermistor power of specifying, thermistor with measure thing sample and directly contact, utilize computation model to calculate coefficient of heat conductivity and the heat transfer coefficient of testing medium according to thermistor own temperature attenuation data.This technical method be applicable to measure under different condition, the inner coefficient of heat conductivity of different porous medium and heat transfer coefficient, by utilizing high pressure seal can insert in high pressure low temperature reactor by thermosensitive resistance measurement probe, the coefficient of heat conductivity of in site measurement multi phase state medium under high pressure low temperature condition and heat transfer coefficient.For the medium that there is multi phase state under cryogenic high pressure, by piston to measurement thing sample compacting standardization, the method of multiple spot original position real-time online measuring can obtain different spaces and not coefficient of heat conductivity in the same time, can calculate heat transfer coefficient for the multi phase state medium that there is flowing by heat transfer model simultaneously.Traditional heat-pole method and dull and stereotyped plane heat source method measure thing sample coefficient of heat conductivity, apply more in atmospheric conditions, but apply under cryogenic high pressure condition less, under especially there is the condition of multi phase state, poor in ease for use and simple operation degree.In addition, because traditional heat-pole method and dull and stereotyped plane heat source method thermal value are usually larger, under multi phase state material coexists, easily cause self physical property of multi phase state material and the change of state, thus cause larger measuring error, in the process of application, there is certain limitation, traditional heat-pole method and dull and stereotyped plane heat source method not yet realize the synchro measure of coefficient of heat conductivity and heat transfer coefficient simultaneously.Coefficient of heat conductivity under the current high pressure low temperature of measurement in position condition under multi phase state and heat transfer coefficient method of testing have not been reported.

Summary of the invention

In order to solve the problem in above high pressure low temperature multi phase state coefficient of heat conductivity and heat transfer coefficient measuring process, the present invention develops a kind of for measuring multi phase state material coefficient of heat conductivity and heat transfer coefficient method of testing under high pressure low temperature condition, multi phase state material coefficient of heat conductivity and heat transfer coefficient under the online in site measurement high pressure low temperature of its order on a kind of in-situ measurement device basis of high pressure low temperature coefficient of heat conductivity heat transfer coefficient.

The technical solution used in the present invention is:

An in-situ testing device for high pressure low temperature coefficient of heat conductivity, heat transfer coefficient, comprises thermosensitive resistance measurement probe, high pressure low temperature reactor, power supply input control system and data acquisition system (DAS) etc.; Thermosensitive resistance measurement probe is thermistor, high pressure seal and circuit control panel from bottom to top.The lower end that thermistor is popped one's head at thermosensitive resistance measurement, thermosensitive resistance measurement probe center section is high pressure seal, and the cavity on thermosensitive resistance measurement probe top is connected with circuit control panel; Thermistor directly inserts in high pressure low temperature reactor, and middle high pressure seal is connected with high pressure low temperature reactor, and the top of thermosensitive resistance measurement probe is outside at high pressure low temperature reactor.

The connection wire of thermistor adopts insullac coating, prevents circuit from producing short circuit with containing after the medium contact of liquid.The connection wire of the thermistor after process first through stainless steel tubule, then passes high pressure seal.The stainless steel tubule of epoxy resin perfusion connects wire for wrapping up protection, thermistor is fixed on the port of stainless steel tubule simultaneously.High pressure seal inside adopts the connection wire of pressure-resistant plastic extruding thermistor, for carrying out high pressure sealing to connection wire; Stainless steel tubule and high pressure seal utilize adhering with epoxy resin to fix, in order to avoid in hyperbaric environment, stainless-steel tube is inside and outside produces huge pressure reduction, want stainless steel tubule evenly punches process, aperture 1mm, pitch-row 15mm, for eliminating pipeline inside and outside differential pressure, under all elements inserted in autoclave are all in pressure balanced environment like this, work that can be more stable.

Wherein thermosensitive resistance measurement probe adopts rapid-acting coupling to be connected with high pressure low temperature reactor, is convenient to installation and removal.Circuit control panel mainly contains power transformation resistance and circuit protecting element, power transformation resistance is used for current value in regulating circuit, and circuit protecting element is used for preventing momentary current in circuit excessive, protection thermistor and whole circuit.The top circuit delivery outlet of thermosensitive resistance measurement probe is connected with outside direct current of voltage regulation source control system and data acquisition system (DAS), and constant voltage dc source, and can curent change in control circuit for powering to thermistor.The parameter such as current value in the resistance value of data acquisition system thermistor and circuit.

High pressure low temperature reactor has two Room, is connected between two Room by piston, measures the upper room that high pressure low temperature reactor directly put into by thing sample.Promoting piston by constant pressure pump in the water filling of high pressure low temperature reactor lower end, for suppressing the measurement thing sample of upper indoor, utilizing constant pressure to carry out standardization compacting to measurement thing sample.High pressure low temperature reactor top is reserved with temperature sensor interface, pressure sensor interface, thermosensitive resistance measurement probe interface and air intake-exhaust interface; Above-mentioned interface all adopts rapid-acting coupling interface, and position all can exchange.Displacement transducer is positioned at high pressure low temperature reactor lower cover center, can detect piston movement displacement and determine the volume of high pressure low temperature reactor two Room.Wherein gas and liquid can utilize constant flow pump, gas-holder inputs in high pressure low temperature reactor, in addition gases at high pressure also can under the control of counterbalance valve, discharge from exhausr port with the pressure of setting, the gas-liquid of arranging into discharge can by its flow velocity of flowmeter survey and integrated flow.Temperature sensor, pressure transducer and thermosensitive resistance measurement probe is synchronously measured online, and exports unified for data, utilizes computation model to carry out coefficient of heat conductivity and the Local Heat Transfer Coefficient of computation and measurement thing sample.

On above-mentioned stainless steel tubule, the aperture of evenly punching is 1mm, and pitch-row is 15mm.

Adopt above-mentioned in-situ testing device to carry out home position testing method, comprise the steps:

The first step, corrects thermosensitive resistance measurement model parameter

Utilize standard substance according to the characteristic of testing medium respectively to β, α, t, the k in formula (1)-(5) _bcorrect with d, after correction, carry out survey calculation;

$R=28044.795\exp \left[\mathrm{\β}(\frac{1}{T}-\frac{1}{273.15})\right]---\left(1\right)$

$\frac{1}{k_m}=4\mathrm{\πa}\frac{\mathrm{\ΔT}}{P}-\frac{0.2}{k_b}---\left(2\right)$

${\mathrm{Nu}}_d={\{\frac{\mathrm{\π}{k}_{f}d(1/2+t/d)R_s\{\mathrm{\β}/1n[\left(\frac{V}{V_s}\right)\left(\frac{R_s}{\mathrm{\α}}\right)]-T_f\}}{\left({\mathrm{VV}}_s\right)}-\frac{1}{6}\left(\frac{t}{d}\right)\left(\frac{k_f}{k}\right)\}}^{-1}---\left(3\right)$

${\mathrm{Bi}}_t={\mathrm{Nu}}_d\left(\frac{t}{d}\right)\left(\frac{k_f}{k}\right)---\left(4\right)$

$h=\frac{\left({\mathrm{VV}}_s\right)}{\mathrm{\πd}(\frac{d}{2}+t)R_s\{\mathrm{\β}/1n[\left(\frac{V}{V_s}\right)\left(\frac{R_s}{\mathrm{\α}}\right)]-T_f\}}(1+\frac{{\mathrm{Bi}}_t}{6})---\left(5\right)$

In formula (1)-(5), R: thermistor resistance, Ω; β: thermistor temp coefficient; T: thermistor own temperature, K; K _m: testing medium coefficient of heat conductivity, W/m K; A: thermistor radius, m; Δ T: temperature increment on thermal resistor, K; P: thermistor heating power, W; K _b: thermistor probe coefficient of heat conductivity, W/m K; Nu _d: average nusselt number, hd/kf; K _f: the coefficient of heat conductivity of testing medium, W/m K; D: thermistor heat transfer model diameter, m; T: thermistor heat transfer model thickness, m; R _s: measuring resistance resistance, Ω; V: thermistor voltage pressure drop, V; V _s: measuring resistance voltage drop, V; α: thermistor meter constant, Ω; K: thermistor probe self coefficient of heat conductivity, W/m K; Bi _t: biot number; H: mean heat transfer coefficient, W/m ²k;

Second step, fills and measures thing sample production standard test sample book

Open high pressure low temperature reactor upper cover, insert solid to be measured and liquid, after covering bonnet, insert temperature, pressure, thermosensitive resistance measurement probe; The diverse location of multiple thermosensitive resistance measurement probe intercalation reaction still; Open all terminal valves, utilize constant pressure pump slowly to promote piston moves, extruding measures thing sample to set pressure, and stablizes a period of time; Vacuumize rear injection gases at high pressure; Utilize vacuum pump to extract residual gas in high pressure low temperature reactor out, then adopt gas injection infusion to enter gases at high pressure to set pressure; Thermosensitive resistance measurement probe is connected with DC power system, temperature sensor, pressure transducer wiring is connected with data acquisition module simultaneously and be connected computing machine;

3rd step, heat conducting coefficient measuring and heat transfer coefficient

Start after thing sample to be measured reaches set condition to measure, first open constant voltage dc source, by the power of power transformation resistance control inputs thermistor on circuit board, the data acquisition system not magnitude of voltage of thermistor and the current value of circuit in the same time simultaneously; The temperature of association reaction still, pressure parameter, utilize temperature damping's data of thermistor, bring coefficient of heat conductivity, heat transfer coefficient calculating model formation (1)-(5) respectively into, calculate not in the same time with coefficient of heat conductivity and the heat transfer coefficient of different spaces;

4th step, Data Integration analysis

The measurement of coefficient of heat conductivity and heat transfer coefficient can measure the whole phase-state change process of thing sample by Real-Time Monitoring, in conjunction with the temperature in high pressure low temperature reactor, pressure, gas-liquid flow and flow velocity, coefficient of heat conductivity and heat transfer coefficient data, finally draw the Heat Transfer Data of multi phase state material different spaces, different time.

The invention has the beneficial effects as follows: the in site measurement being applicable to multi phase state high pressure low temperature coefficient of heat conductivity, heat transfer coefficient, simultaneously can Real-Time Monitoring different spaces, coefficient of heat conductivity and heat transfer coefficient change in different time.In measuring process, the thermal value of thermistor is less, can effectively avoid heat dissipation capacity on the impact of measurement thing sample phase-state change.High pressure low temperature reactor inner carrier, can unified measurement standard to measurement thing pattern sample standardization compacting, improves the reference value of data.In addition, thermistor probe part easily changes, and is convenient to Long-Time Service.

Accompanying drawing explanation

Fig. 1 is the in-situ test probe structural representation of in-situ testing device of the present invention.

Fig. 2 is in-situ testing device system construction drawing of the present invention.

Fig. 3 is in-situ testing device reactor of the present invention probe layout.

Fig. 4 is the reactor sectional view of in-situ testing device of the present invention.

Fig. 5 is methane hydrate coefficient of heat conductivity and hygrogram in porous medium.

Fig. 6 is methane hydrate decomposable process heat transfer coefficient and temperature variation in porous medium.

In figure: 1 thermistor; 2 epoxy resin; 3 punching stainless-steel tubes; 4 O-ring seals; 5 rapid-acting couplings; 6 pressure-resistant plastics; 7 high pressure sealing heads; 8 circuit control panels; 9 circuit delivery outlets; 10 bolts; 11 temperature, pressure, thermosensitive resistance measurement probe general-purpose interface; Cap rock on 12; 13 O RunddichtringOs; 14 water filling ports; 15 displacement transducers; 16 O-ring seals; 17 times cap rocks; 18 pistons.

Embodiment

Below in conjunction with accompanying drawing and technical scheme, further illustrate the specific embodiment of the present invention.

Fig. 1-4 illustrates a kind of high pressure low temperature coefficient of heat conductivity, heat transfer coefficient in-situ testing device.This device is important to be made up of two parts.Part I is thermosensitive resistance measurement probe, as shown in Figure 1, first the wire of thermistor is cleaned up, utilize insullac to insulate, repeatedly carry out three times, after test insulativity is good, the wire of thermistor is passed punching fine steel tube, and use epoxy resin filling fine steel tube, wrap up thermal resistor wire simultaneously, stablize thermistor, then thermal resistor wire is passed high pressure seal, punching fine steel tube inserted high pressure seal leading portion simultaneously and fix with epoxy gluing.Finally the circuit board of wire with thermosensitive resistance measurement probe tip is connected, and fastening inspection is carried out to various piece.Thermosensitive resistance measurement probe is connected with high pressure low temperature reactor in rapid-acting coupling mode, is convenient to plug and replacing, and constant voltage dc source is connected with the circuit board of thermistor, for electric current needed for supply circuit.

Part II is high pressure low temperature reactor, piston is equipped with in the middle of reactor, constant pressure pump is utilized to inject ethylene glycol to room under reactor, thing sample is measured by piston compacting, be convenient to unified measurement standard, in addition reactor top is equipped with temperature sensor and pressure transducer, can obtain the three-dimensional Temperature Distribution of determinand sample in reactor.Reactor top is air intake opening and gas outlet respectively, for injection and the discharge of gas, liquid.High pressure low temperature reactor is placed in constant temperature oven, utilizes constant temperature oven to control reactor temperature.The vacuum pump be equipped with is used for the air in abstraction reaction still.Whole measuring system as shown in Figure 2.Wherein on reactor arrange that probe positions as shown in Figure 3, all probe positions are standard fast interface, and different measuring sondes, air inlet/outlet can transpositions.The sectional view of reactor as shown in Figure 4.

Embodiment

In porous medium, methane hydrate decomposes is the process that multi phase state coexists under high pressure low temperature condition, be attended by phase-state change process simultaneously, conventional classic method is difficult to its different phase coefficient of heat conductivity, and decomposable process heat transfer coefficient is measured, and is below test implementation process of the present invention:

First, open reactor upper cover, choose methane hydrate and carry out in-situ preparation in porous medium:

1. (particle diameter is 0.4mm, and factor of porosity is 0.36, and density is 2.58g/cm to choose 6Kg glass sand ³) in placing response still, by 1Kg deionized water and glass sand Homogeneous phase mixing.Close reactor, inserts temperature sensor, thermistor probe, pressure transducer, and connect pipeline.

2. open reactor top terminal valve, utilize constant flow pump slowly in reactor piston, to inject ethylene glycol solution (low temperature resistant), slow extruded sample, to constant pressure 2MPa.

3. vacuumize, then utilize gas pump to inject quantitative methane gas (127 standard liter), wherein in reactor, pressure is about 7MPa, closes all valves afterwards.

4. utilize air bath to freeze, allowing reactor generating methane hydrate under constant temperature 3 DEG C of conditions, avoiding the generation of ice.

5. whether hydrate generates to utilize temperature-pressure curve to judge, after hydrate generates, stablizes 24 hours.According to the factor of porosity of known porous medium, each volume components, consumes the molal quantity of methane, calculates and generates methane hydrate quantity, and the saturation degree of methane hydrate (30%).

6. measure under equilibrium temperature (3 DEG C) condition, the coefficient of heat conductivity of methane hydrate.Before experiment, first measure at ambient temperature some standard substances, the results show, experimental error within 5%, and has good experimental repeatability, as shown in table 1.First constant voltage dc source is opened during experiment, control voltage is 15V, connect circuit, according to formula (1), the resistance of thermistor is transformed to temperature value, utilizes bulk temperature in thermistor own temperature and reactor to do difference, calculate Δ T, calculate P value according to current value in circuit and thermistor self-resistance value, calculate instantaneous coefficient of heat conductivity according to formula (2), wherein K _bbe empirical constant value with a, be respectively 0.0411007 and 0.001938666. to calculate thermal conductivity value be 0.739W/km, measuring process data as shown in Figure 5, after connecting circuit, measurement result is stable in 50 seconds, has good stable experiment and repeatability.

Table 1. standard substance thermal conductivity measurement and error analysis

7. calculate the heat transfer coefficient of methane hydrate decomposable process, the phase-state change that the decomposable process of methane hydrate relates to, multi phase state coexists, and there is flow process, measures effective heat transfer coefficient according to thermistor method.First open constant voltage dc source, control voltage is 15V, connects circuit, adopt counterbalance valve to control aerogenesis pressure (2MPa) simultaneously, reduce the pressure in reactor, impel decomposition of hydrate, decomposition of hydrate is water and methane gas, and methane gas is by flowmeter inflow gas holding tank.According to formula 1, the resistance of thermistor is transformed to temperature value, ensemble average temperature in thermistor own temperature and reactor is utilized to do difference, calculate Δ T, P value is calculated according to current value in circuit and thermistor self-resistance value, according to formula 3,4,5 calculate heat transfer coefficient in methane hydrate decomposable process.Wherein T _ffor Average bulk temperature in reactor, k _f, β, k, d, α, t are the experiment parameter of this operating condition of test, are respectively 0.578W/km, and 3336.3,0.002m, 0.0015m, 0.1323m, 0.004m, Vs are thermistor its voltage, and V is circuit total voltage, R _sfor thermistor transient resistance.The heat transfer coefficient asked is at 80-150W/m ²within the scope of K, as shown in Figure 6, in the reasonable scope, experiment simultaneously has good stability and repeatability to empirical tests experiment value for the heat transfer coefficient of measuring process and temperature.

${\mathrm{Nu}}_d={\{\frac{\mathrm{\π}{k}_{f}d(1/2+t/d)R_s\{\mathrm{\β}/1n[\left(\frac{V}{V_s}\right)\left(\frac{R_s}{\mathrm{\α}}\right)]-T_f\}}{\left({\mathrm{VV}}_s\right)}-\frac{1}{6}\left(\frac{t}{d}\right)\left(\frac{k_f}{k}\right)\}}^{-1}---\left(3\right)$

${\mathrm{Bi}}_t={\mathrm{Nu}}_d\left(\frac{t}{d}\right)\left(\frac{k_f}{k}\right)---\left(4\right)$

$h=\frac{\left({\mathrm{VV}}_s\right)}{\mathrm{\πd}(\frac{d}{2}+t)R_s\{\mathrm{\β}/1n[\left(\frac{V}{V_s}\right)\left(\frac{R_s}{\mathrm{\α}}\right)]-T_f\}}(1+\frac{{\mathrm{Bi}}_t}{6})---\left(5\right).$

Claims (2)

1. a home position testing method for high pressure low temperature coefficient of heat conductivity, heat transfer coefficient, is characterized in that,

The in-situ testing device of this high pressure low temperature coefficient of heat conductivity, heat transfer coefficient, comprises thermosensitive resistance measurement probe and high pressure low temperature reactor; Thermosensitive resistance measurement probe is thermistor, high pressure seal and circuit control panel from bottom to top; The lower end that thermistor is popped one's head at thermosensitive resistance measurement, thermosensitive resistance measurement probe center section is high pressure seal, and the cavity on thermosensitive resistance measurement probe top is connected with circuit control panel; Thermistor directly inserts in high pressure low temperature reactor, and middle high pressure seal is connected with high pressure low temperature reactor, and the top of thermosensitive resistance measurement probe is outside at high pressure low temperature reactor;

The connection wire of thermistor adopts insullac coating, connects wire first through stainless steel tubule, then through high pressure seal; The stainless steel tubule of epoxy resin perfusion connects wire for wrapping up protection, thermistor is fixed on the port of stainless steel tubule simultaneously; High pressure seal inside adopts the connection wire of pressure-resistant plastic extruding thermistor, for carrying out high pressure sealing to connection wire; Stainless steel tubule and high pressure seal utilize adhering with epoxy resin to fix, and stainless steel tubule evenly punches;

Wherein thermosensitive resistance measurement probe adopts rapid-acting coupling to be connected with high pressure low temperature reactor, circuit control panel there are power transformation resistance and circuit protecting element, power transformation resistance is used for current value in regulating circuit, and circuit protecting element is used for preventing momentary current in circuit excessive, protection thermistor and whole circuit; The top circuit delivery outlet of thermosensitive resistance measurement probe is connected with outside direct current of voltage regulation source control system and data acquisition system (DAS), and constant voltage dc source, and can curent change in control circuit for powering to thermistor; Current value in the resistance value of data acquisition system thermistor and circuit;

High pressure low temperature reactor has two Room, is connected between two Room by piston, measures the upper room that high pressure low temperature reactor directly put into by thing sample; Promoting piston by constant pressure pump in the water filling of high pressure low temperature reactor lower end, for suppressing the measurement thing sample of upper indoor, utilizing constant pressure to carry out standardization compacting to measurement thing sample; High pressure low temperature reactor top is reserved with temperature sensor interface, pressure sensor interface, thermosensitive resistance measurement probe interface and air intake-exhaust interface; Above-mentioned interface all adopts rapid-acting coupling interface, and position is all interchangeable; Displacement transducer is positioned at high pressure low temperature reactor lower cover center, can detect piston movement displacement and determine the volume of high pressure low temperature reactor two Room; Wherein gas and liquid utilize constant flow pump, gas-holder inputs in high pressure low temperature reactor, and gases at high pressure, under the control of counterbalance valve, are discharged from exhausr port with the pressure set, and arrange gas-liquid into discharge by its flow velocity of flowmeter survey and integrated flow; Temperature sensor, pressure transducer and thermosensitive resistance measurement probe is synchronously measured online, and exports unified for data, utilizes computation model to carry out coefficient of heat conductivity and the Local Heat Transfer Coefficient of computation and measurement thing sample;

Adopt above-mentioned in-situ testing device to carry out in-situ test, step is as follows:

The first step, corrects thermosensitive resistance measurement model parameter

Utilize standard substance according to the characteristic of testing medium respectively to β, α, t, the k in formula (1)-(5) _bcorrect with d, after correction, carry out survey calculation;

$R=28044.795\exp \left[\mathrm{\β}(\frac{1}{T}-\frac{1}{273.15})\right]---\left(1\right)$

$\frac{1}{k_m}=4\mathrm{\πa}\frac{\mathrm{\ΔT}}{P}-\frac{0.2}{k_b}---\left(2\right)$

${\mathrm{Nu}}_d={\{\frac{\mathrm{\π}{k}_{f}d(1/2+t/d)R_s\{\mathrm{\β}/\ln [\left(\frac{V}{V_s}\right)\left(\frac{R_s}{\mathrm{\α}}\right)]-T_f\}}{\left({\mathrm{VV}}_s\right)}-\frac{1}{6}\left(\frac{t}{d}\right)\left(\frac{k_f}{k}\right)\}}^{-1}---\left(3\right)$

${\mathrm{Bi}}_t={\mathrm{Nu}}_d\left(\frac{t}{d}\right)\left(\frac{k_f}{k}\right)---\left(4\right)$

$h=\frac{\left({\mathrm{VV}}_s\right)}{\mathrm{\πd}(\frac{d}{2}+t)R_s\{\mathrm{\β}/\ln [\left(\frac{V}{V_s}\right)\left(\frac{R_s}{\mathrm{\α}}\right)]-T_f\}}(1+\frac{{\mathrm{Bi}}_t}{6})---\left(5\right)$

Second step, fills and measures thing sample production standard test sample book

Open high pressure low temperature reactor upper cover, insert solid to be measured and liquid, after covering bonnet, insert temperature, pressure, thermosensitive resistance measurement probe; The diverse location of multiple thermosensitive resistance measurement probe intercalation reaction still; Open all terminal valves, utilize constant pressure pump slowly to promote piston moves, extruding measures thing sample to set pressure, and stablizes a period of time; Vacuumize rear injection gases at high pressure; Utilize vacuum pump to extract residual gas in high pressure low temperature reactor out, then adopt gas injection infusion to enter gases at high pressure to set pressure; Thermosensitive resistance measurement probe is connected with DC power system, temperature sensor, pressure transducer wiring is connected with data acquisition module simultaneously and be connected computing machine;

3rd step, heat conducting coefficient measuring and heat transfer coefficient

Start after thing sample to be measured reaches set condition to measure, first open constant voltage dc source, by the power of power transformation resistance control inputs thermistor on circuit board, the data acquisition system not magnitude of voltage of thermistor and the current value of circuit in the same time simultaneously; The temperature of association reaction still, pressure parameter, utilize temperature damping's data of thermistor, bring coefficient of heat conductivity, heat transfer coefficient calculating model formation (1)-(5) respectively into, try to achieve not in the same time with coefficient of heat conductivity and the heat transfer coefficient of different spaces;

4th step, Data Integration analysis

The measurement of coefficient of heat conductivity and heat transfer coefficient can measure the whole phase-state change process of thing sample by Real-Time Monitoring, in conjunction with the temperature in high pressure low temperature reactor, pressure, gas-liquid flow and flow velocity, coefficient of heat conductivity and heat transfer coefficient data, finally draw the Heat Transfer Data of multi phase state material different spaces, different time.

2. home position testing method according to claim 1, is characterized in that, on stainless steel tubule, the aperture of evenly punching is 1mm, and pitch-row is 15mm.