CN109991275A - A kind of test macro and application method for Fracture System heat exchange efficiency - Google Patents
A kind of test macro and application method for Fracture System heat exchange efficiency Download PDFInfo
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Abstract
A kind of test macro and method for Fracture System heat exchange efficiency provided by the invention, including water tank, surge chamber, water injecting pump, heat exchange kettle, suction pump and waste liquid cylinder, wherein, cold water is filled in water tank, the entrance of the water outlet connection surge chamber of water tank, by the entrance of water injecting pump connection heat exchange kettle, the outlet of heat exchange kettle passes through the entrance of suction pump connection waste liquid cylinder, offers exhaust valve on heat exchange kettle for the outlet of surge chamber；It is placed with several rock rock samples in heat exchange kettle, forms different slit systems；Heating device is provided on surge chamber and rock rock sample；Overcome the shortcomings that can not easily testing different Fracture System heat exchange efficiencies in laboratory conditions at present, laboratory techniques can be utilized, make the Fracture System model of various heat exchange area, manufacturing process is simple, easy to operate, can heat exchanging process of analogue simulation under the conditions of certain fracture spacing and reaction time.
Description
Technical field
The present invention relates to geothermal exploitation technical field, in particular to a kind of test macro for Fracture System heat exchange efficiency
And application method.
Background technique
Geothermal energy resources are the clean reproducible energies that a kind of reserves are big, high-efficient, stability is good, for energy-saving and emission-reduction, are controlled
Reason haze etc. is of great significance.Hot dry rock as a kind of novel terrestrial energy, refer mainly to be free of or contain only a small amount of fluid,
Temperature is higher than 180 DEG C, its thermal energy available rock mass under current techniques economic condition.The hot dry rock total resources of the depths 3-10km
Amount about 2.5 × 1025J is equivalent to 856,000,000,000,000 tons of mark coals, it is seen that its resource potential is very huge.But since dry-hot-rock geothermal provides
The more preservations in source are in anhydrous, fine and close magmatic rock, need to usually developing natural fracture/Fracture System or after fracture acidizing is transformed
Just there is extraction value, therefore, hot dry rock is usually otherwise known as enhanced geothermal system, i.e. enhanced geothermal
System, abbreviation EGS.
However, effect is stitched in the production of pressure break and acidification since Reproducible ability underground developmental state is difficult to directly observe
Fracture System complicated and changeable and different also corresponds to different slit connectivity, fracture spacing and heat exchange area, therefore can be into
One step influences heat exchange and the production efficiency of final geothermal energy resources.For the major parameter of Fracture System, geology is mainly used at present
It makes an on-the-spot survey, rock core is observed or the modes such as micro-seismic monitoring are obtained.It is that it is sufficiently not sharp but for such fracture parameters
To realize the final purpose for evaluating different Fracture System heat exchanger effectiveness.It is newest in the world to propose using thermo-responsive tracer
Carry out the idea of quantification characterization to heat exchange area and heat exchanger effectiveness, but its concept feasible and parametric reliability wait into
One step research.Simulation evaluation, but numerical simulation can also be carried out to the heat exchange efficiency of different Fracture Systems using numerical simulation means
Parameter is affected by human factors larger, and numerical result also needs practical local heat transfer to be verified, therefore the means are only capable of
To auxiliary reference, it is still necessary to the modes of surveying further to be confirmed.
Currently, forming suitable laboratory system, not yet to carry out effective mould to the heat exchange efficiency under different Fracture Systems
Fit test.Although a small number of scholars have proposed the primary prospect of simulation system, numerical simulation means are often only limitted to, not shape
At real experiment equipment, there is also certain gaps with expection in terms of confidence level.Therefore, it is necessary to be formed a kind of convenient to use
The experimental system of different Fracture System heat exchange efficiencies is tested, to meet the practical need to geothermal exploitation, especially hot dry rock exploitation
It wants.
Summary of the invention
The purpose of the present invention is to provide a kind of test macros and application method for Fracture System heat exchange efficiency, solve
Simulation and test can not be effectively performed in existing Fracture System heat exchanger effectiveness, lead to the reality for not being able to satisfy hot dry rock exploitation
Border needs.
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of test macro for Fracture System heat exchange efficiency provided by the invention, including water tank, surge chamber, water filling
Pump, heat exchange kettle, suction pump and waste liquid cylinder, wherein cold water is filled in water tank, the water outlet connection surge chamber of water tank enters
Mouthful, the outlet of surge chamber is by the entrance of water injecting pump connection heat exchange kettle, and the outlet of heat exchange kettle is by suction pump connection waste liquid cylinder
Entrance offers exhaust valve on heat exchange kettle；
It is placed with several rock rock samples in heat exchange kettle, forms different slit systems；
Heating device is provided on surge chamber and rock rock sample.
Preferably, the heating device being arranged in surge chamber includes primary heater.
Preferably, the heating device being arranged on rock rock sample includes secondary heater.
Preferably, the first thermo detector is provided in surge chamber.
Preferably, the second thermo detector is provided in heat exchange kettle.
Preferably, third thermo detector is provided on rock rock sample.
A kind of application method of the test macro for Fracture System heat exchange efficiency is used for crack system based on described one kind
The test macro of system heat exchange efficiency, comprising the following steps:
Step 1, according to simulated object, the experiment parameter of heat exchange models is set, the experiment parameter includes the note of heat exchange kettle
Enter water initial temperature Tw0, rock sample initial temperature Tr0, rock sample lithology, reaction time t and two adjacent rocks
Spacing l between samplei, wherein the thickness h of rock sample and heat exchange kettle are contour；
Step 2, the experiment parameter set according to step 1 chooses rock sample, and according between the rock sample of setting
The rock sample of selection is placed in heat exchange kettle by spacing；
Step 3, the cold water in water tank is injected into surge chamber and is heated to preset injection water initial temperature Tw0；
Step 4, by rock sample heating until preset temperature Tr0, exhaust valve is opened, water injecting pump is opened, it is fast into heat exchange kettle
Speed fills warmed-up water, closes exhaust valve；
Step 5, after reaction time t, the temperature of hot water in the temperature and heat exchange kettle of rock sample is measured, respectively obtains and changes
Hot water final temperature T in hot kettlewiWith the final temperature T of rock sampleri；
Step 6, the hot water final temperature T in heat exchange kettle obtained according to step 5wiWith the final temperature T of rock sampleri
Calculate the fracture spacing, heat exchange area and heat exchange efficiency of i-th of Fracture System.
Preferably, in step 6, it is calculate by the following formula the fracture spacing D of i-th of Fracture Systemi:
It is calculate by the following formula the heat exchange area S of i-th of Fracture Systemi:
Si=4ni·li·h
In formula, niFor the quantity of rock rock sample in i-th of Fracture System；
It is calculate by the following formula the heat exchange efficiency ε of i-th of Fracture Systemi:
In formula, QiFor practical heat exchange amount；QimaxIt can heat exchange amount for theoretical maximum；
Qi=cw·mw·(Twi-Tw0)
=cw·ρw·Vw·(Twi-Tw0)
=cw·ρw·(Vtotal-Vr)·(Twi-Tw0)
In formula, cwRepresent the specific heat capacity of water, ρwRepresent the density of water, VtotalRepresent the total volume of heat exchange kettle, VrRepresent rock
The total volume of rock sample；
In formula, crRepresent the specific heat capacity of rock rock sample, ρrRepresent the density of rock rock sample.
Preferably, the temperature of the water injected in water tank is less than or equal to the injection water initial temperature T of heat exchange kettlew0；Rock rock
The initial temperature of sample is less than or equal to the initial temperature T of rock sampler0。
Compared with prior art, the beneficial effects of the present invention are:
A kind of test macro and method for Fracture System heat exchange efficiency provided by the invention, utilizes different rock-likes
Product are combined, and form different slit systems, by water tank, surge chamber, water injecting pump, heat exchange kettle, suction pump and waste liquid cylinder group
At Fracture System experimental model, the Fracture System experimental model can effectively simulation in certain fracture spacing and reaction time item
Heat exchanging process under part simultaneously as the reaction time is also one of the controlled variable in experimentation, therefore can also tested
The influence of the time exchange thermal efficiency is considered in analysis.The Fracture System experimental model because with the crack system in the TOUGH groupware
System numerical model similarity with higher, therefore can also be used for the reliability of verifying TOUGH groupware calculated result.This hair
It is bright to utilize relatively easy simulation means, the heat exchange efficiency of different Fracture Systems can be quickly and easily tested, is changed in geothermal reservoir
Making has preferable dissemination with the development phase.
The present invention overcomes can not easily test lacking for different Fracture System heat exchange efficiencies in laboratory conditions at present
Point can utilize laboratory techniques, make the Fracture System model of various heat exchange area, manufacturing process is simple, easy to operate, can imitate
Heat exchanging process of true simulation under the conditions of certain fracture spacing and reaction time.
Detailed description of the invention
Fig. 1 is test system structure schematic diagram of the present invention；
Fig. 2 is test method flow diagram of the present invention；
Fig. 3 is different Fracture System schematic diagrames of the invention, wherein Fig. 3 a is 1*1 fracture network model of analogous outcrop；Fig. 3 b is 2*2
Fracture network model of analogous outcrop；Fig. 3 c is 4*4 fracture network model of analogous outcrop；Fig. 3 d is 8*8 fracture network model of analogous outcrop；
Wherein, 1, water tank 2, the first conduit 3, the first valve 4, the second conduit 5, surge chamber 6, primary heater
7, the first thermo detector 8, the first thermo detector 9, the second valve 10, the 4th conduit 11, water injecting pump 12, the 5th conduit 13, body
Product flowmeter 14, right angle conduit 15, heat exchange kettle 16, the second thermo detector 17, rock rock sample 18, secondary heater 19, the
Three thermo detectors 20, the 5th conduit 21, suction pump 22, the 6th conduit 23, third valve 24, drainpipe 25, waste liquid cylinder
26, timer.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in more detail.
The present invention on the basis of heat exchange models, clearly tests analog parameter, and according to the size and need of heat exchange kettle first
The Fracture System of simulation prepares corresponding rock sample.Secondly, assembling laboratory apparatus, closes all valves, to water tank and change
The rock sample for being respectively put into cold water in hot kettle and preparing, and cold water and rock sample are heated to preset temperature respectively, when being kept for one section
Between.Again, water injecting pump is opened, the water after preheating is filled rapidly into heat exchange kettle, water and rock sample is come into full contact with one section of heat exchange
After time t, the successively corresponding final hot water temperature of recording different types Fracture System and final rock sample temperature, and calculate separately each
Fracture spacing, heat exchange area and the heat exchange efficiency of Fracture System.Finally carry out experiment post-processing, all accessories in closing system,
Each laboratory apparatus of disassembling system, detergent line and equipment.
As shown in Figure 1, a kind of system for testing Fracture System heat exchange efficiency provided by the invention, the storage including being equipped with cold water
Water pot 1, water tank 1 are connected by the first conduit 2, the first valve 3 and the second conduit 4 with surge chamber 5, and surge chamber 5 passes through third
Conduit 8, the second valve 9 and the 4th conduit 10 connect with water injecting pump 11, and water injecting pump 11 passes through the 5th conduit 12 and volume flowmeter
13 are connected, and volume flowmeter 13 is connected by right angle conduit 14 with 15 water inlet of heat exchange kettle, and 15 water outlet of heat exchange kettle passes through the 5th
Conduit 20 connects with suction pump 21, and suction pump 21 is passed through waste liquid cylinder 25 by the 6th conduit 22, third valve 23 and drainpipe 24.
System is equipped with timer 26 for heat transfer process timing use.
Primary heater 6 and the first thermo detector 7 are provided in surge chamber 5.
The second thermo detector 16 is provided in heat exchange kettle 15, meanwhile, several arrays arrangement is placed in heat exchange kettle 15
Rock rock sample 17 is provided with secondary heater 18 and third thermo detector 19 on each rock rock sample 17.
The temperature of the cold water filled in the water tank 1 should be slightly below water temperature when injection heat exchange kettle 15, and moisture storage capacity is answered
Not less than 3000ml.
Moisture storage capacity in the surge chamber 5 should be not less than 3000ml.
The range of first thermo detector 7, the second thermo detector 16 and third thermo detector 19 should be 0-100 DEG C, measurement essence
Degree is 0.1 DEG C, and the temperature measuring point of thermo detector should be respectively protruding into inside surge chamber 5, heat exchange kettle 15 and rock rock sample 17, and thermo detector shows
Number can clearly be read outside outdoor and kettle.
5 inner cold water of surge chamber can be heated to 50 DEG C from room temperature in 1h by the primary heater 6.
Rock rock sample 17 can be heated to 100 DEG C from room temperature in 1h by the secondary heater 18.
The water injecting pump 11 and suction pump 21 can provide the water filling within the scope of 0-1MPa/draw water power, and degree of regulation is
0.01MPa。
The flow rate test range of the volume flowmeter 13 is 0-3000ml/min, maximum pressure resistance 1MPa, highest heatproof
50℃。
Chamber size is advisable in the heat exchange kettle 15 with 25cm × 25cm × 5cm, and wherein the section 50cm × 50cm is top surface,
15 outer rim of heat exchange kettle can add heat-insulating material to guarantee that heat transfer process is closing adiabatic process in kettle.
The exhaust valve that can be opened/close is arranged in 15 top surface side of heat exchange kettle, to guarantee smoothly pumping/fluid injection body into kettle.
17 size of rock rock sample is determining according to simulation fracture system spacing is needed, but its minimum dimension is not preferably less than
2cm × 2cm × 5cm, rock rock sample 17 are uniformly placed in heat exchange kettle 15 in column shape.
The drainpipe 24 should protrude into 25 bottom of waste liquid cylinder, prevent waste liquid from splashing out pollution.
The waste liquid of 3000ml can be at least contained in the waste liquid cylinder 25.
The timer 26 should have record duration function, and the maximum duration recorded is 72h, and minimum time precision is
0.1s.All valves, conduit and equipment described in system should ensure that leakproofness and good adiabatic function, in 1MPa pressure, 100 DEG C
Significantly deformation and leakage does not occur under the conditions of temperature.
Referring to Fig.1, the operating procedure of Fracture System heat exchange efficiency analysis of test system of the invention are as follows:
Step 1, according to simulated object, heat exchange models is constructed, determine experiment parameter.
Specifying experiment parameter is the prerequisite for carrying out experiment simulation.Firstly, according to the heat exchange scene that need to be simulated, setting is changed
The injection water initial temperature T of hot kettlew0, rock mass initial temperature Tr0, rock mass lithology, reaction time t and two adjacent rock samples
Between spacing, thickness h and the height of heat exchange kettle 15 for setting rock sample be consistent.
Step 2, according to Fracture System heat exchange kettle 15 size and need to simulated, rock sample is prepared.
According to the Fracture System spacing l set in step 11, the complete rock sample of corresponding lithology is selected, is prepared having a size of l1×
l1The rock sample of × h.It can increase in a square grade in view of rock sample number involved in subsequent Fracture System, can only prepare 1 piece at this time
Rock sample.
Step 3, whether each component of detection system is intact, assembles laboratory apparatus, all valves is closed, to water tank 1
Middle injection cold water is uniformly put into the rock rock sample 17 prepared into heat exchange kettle 15.
Each laboratory apparatus is assembled in order after determining that each component is intact according to experimental system schematic diagram.Water tank
Cold water can be filled in 1 in advance, cold water temperature should inject coolant-temperature gage T not higher than modelw0.Meanwhile being in by the rock rock sample 17 made
Column shape is put into heat exchange kettle 15, should be uniformly and appropriate at a distance from rock sample is intermarginal in kettle, and 17 bottom surface of rock rock sample and top surface are answered
It is equipped with heater 18 and thermo detector 19, the effect end of heater 18 and thermo detector 19 should be placed in inside rock rock sample 17, and
Its control terminal and display end should be placed in 15 outside of heat exchange kettle.The initial temperature of rock rock sample 17 should be not higher than model rock temperature
Tr0.All pumps, volume flowmeter, valve should all be adjusted to closed state in system, and waste liquid cylinder 25 can retain a small amount of raffinate to prevent useless
Liquid splashes out.
Step 4, cold water is injected into surge chamber 5 and is heated to preset temperature Tw0Afterwards, a period of time is kept.
Valve 3 is opened, cold water in water tank 1 is injected into surge chamber 5.After liquid measure is enough in room 5 to be buffered, valve 3 is closed,
Start heater 6, and observes the registration variation of thermo detector 7 at any time.Reach model injection coolant-temperature gage T to 7 registration of thermo detectorw0Afterwards,
Close heater 6.If still occurring heating up a little after closing heater, Open valve 3 and can be injected into surge chamber 5 a small amount of
Cold water mix balance.Final plant closure valve 3.
Step 5, rock rock sample 17 is heated to preset temperature Tr0, and kept for a period of time.
Start heater 18 and heat rock rock sample 17, and observes the registration variation of thermo detector 19 at any time.Show to thermo detector 19
Number reaches model rock temperature Tr0Afterwards, heater 18 is closed.
Step 6, exhaust valve is opened, water injecting pump 11 is opened, fills warmed-up water rapidly into heat exchange kettle 15, closes exhaust
Valve.
After injection coolant-temperature gage and 17 temperature of rock rock sample respectively reach preset temperature in room 5 to be buffered, valve 9 is opened, is beaten
15 exhaust valve of heat exchange kettle is opened, starts water injecting pump 11 and volume flowmeter 13, and inject enough temperature into heat exchange kettle 15 rapidly and be
Tw0Water.After water just fills the gap of heat exchange kettle 15, water injecting pump 11 and volume flowmeter 13 are closed, closes valve 9 and row
Air valve, and start timer 26 simultaneously, observe the registration variation of thermo detector 16 and thermo detector 19.Water fills the mark of heat exchange kettle 15
Can quantification be characterized as 13 registration of volume flowmeter and reach:
(25×25×5-n1×l1×l1×h)ml
In formula, n1Represent rock sample number.
Step 7, when reaching t in the reaction time, the correspondence registration of thermo detector 16 and thermo detector 19 is recorded, while opening and drawing water
Pump 21 takes out the residual liquid in heat exchange kettle 15 to the greatest extent.
When reaching t in the reaction time, thermo detector 16 and 19 registration of thermo detector, respectively T are recordedw1And Tr1, open heat exchange kettle
16 exhaust valves open valve 23, start suction pump 21, all liq in heat exchange kettle 15 are taken away rapidly, to which there is no residual liquids
When being discharged from drainpipe 24, suction pump 21 is closed.Waste liquid should shift immediately in waste liquid cylinder 25, guarantee the waste liquid cylinder in experiment next time
25 can continue to use.
Step 8, step 2 is repeated to step 7, and distribution measuring records the hot water temperature under different Fracture Systems, after reaction time t
Degree and rock sample temperature.
After draining in heat exchange kettle 15 hot water and opening wide and cool a period of time, rock rock sample 17, and needle are successively taken out with tweezers
Fracture spacing is liThe Fracture System of (i=2,3,4 ...), manufactured size is l respectivelyi×liThe same lithology rock sample of × h,
Step 2 is repeated in step 7, being obtained respectively in injection coolant-temperature gage is Tw0, rock temperature Tr0, the reaction time be the conditions such as t
Under hot water final temperature TwiWith rock mass final temperature Tri, and record item by item.
Step 9, according to the test result of step 8, fracture spacing, heat exchange area and the heat exchange effect of different Fracture Systems are calculated
Rate, and recorded.
According to the test result of step 8, fracture spacing D corresponding to i-th of Fracture System is calculated separatelyiAre as follows:
Heat exchange area SiAre as follows:
Si=4ni·liH,
In formula, niRepresent the quantity (such as Fig. 3) of rock sample in i-th of Fracture System.Due to that need to ensure between different Fracture Systems
Result there is comparability, therefore should ensure that injection water total volume and rock sample total volume it is always consistent, then as inferior
Formula answers permanent establishment:
In formula, VrRepresent rock sample total volume.Therefore, heat exchange area SiIt can further indicate that are as follows:
That is fracture interval 1iIt is smaller, heat exchange area SiIt is bigger.
Heat exchange efficiency εiAre as follows:
In formula, QiRepresent practical heat exchange amount, QmaxRepresentation theory maximum can heat exchange amount.QiTable can be changed by actual water temperature
Show, it may be assumed that
Qi=cw·mw·(Twi-Tw0)
=cw·ρw·Vw·(Twi-Tw0)
=cw·ρw·(Vtotal-Vr)·(Twi-Tw0),
In formula, cwRepresent the specific heat capacity of water, ρwRepresent the density of water, VtotalRepresent the total volume of heat exchange kettle 15, VrRepresent rock
The total volume of stone rock sample 17.And the thermally conductive amount Q of theoretical maximumimaxIt should then indicate are as follows:
QimaX=cw·ρw·(Vtotal-Vr)(Tiw-eq-Tw0),
In formula, Tiw-eqWhen for theoretical final thermal balance, the common final temperature of water and rock sample, then should have in thermal response kettle 15
Relational expression:
Tiw-eq=Tir-eq,
In formula, Tiw-eqRepresent temperature of the hot water in thermal balance, Tir-eqRepresent temperature of the rock sample in thermal balance.According to
Law of conservation of energy, the heat that water absorbs are answered equal with the heat that rock sample discharges, it may be assumed that
cw·ρw·(Vtotal-Vr)·(Tiw-eq-Tw0)=cr·ρr·Vr·(Tr0-Tir-eq),
In formula, crRepresent the specific heat capacity of rock sample, ρrThe density of rock sample is represented, is solved after simultaneous:
Therefore, QimaxAnd εiIt can be addressed further under respectively are as follows:
Finally, recording all experiment parameters item by item, reference record can refer to following table:
Step 10, experiment post-processes, all water injecting pumps, suction pump and volume flowmeter in closing system, and disassembling system is each
Laboratory apparatus, detergent line and equipment.
After all observation and analysis finish and system stops stablizing, closing water injecting pump 11 and suction pump 21, closing valve 3,
Valve 9 and valve 23, successively each instrument and equipment of disassembling system, utilizes detergent or each instrument pipeline of clear water cleaning system and heat exchange
Raffinate in waste liquid cylinder 25 is poured into dedicated container and carries out subsequent processing by kettle 15, and 1 inner cold water of water tank can be put into special liquid storage container
In case subsequent experimental is carried out.
The present invention overcomes can not easily test lacking for different Fracture System heat exchange efficiencies in laboratory conditions at present
Point can utilize laboratory techniques, make the Fracture System model of various heat exchange area, manufacturing process is simple, easy to operate, can imitate
Heat exchanging process of true simulation under the conditions of certain fracture spacing and reaction time.Simultaneously as the reaction time is also to test
One of controlled variable in journey, therefore the influence of the time exchange thermal efficiency can also be considered in test analysis.The Fracture System is real
Test model because with the Fracture System numerical model similarity with higher in the TOUGH groupware, therefore can also be used for verifying
The reliability of TOUGH groupware calculated result.The present invention utilizes relatively easy simulation means, can quickly and easily test
The heat exchange efficiency of different Fracture Systems has preferable dissemination in geothermal reservoir transformation and development phase.
The above, only specific embodiments of the present invention cannot limit the practical range of invention with it, so it is equivalent
The displacement of component, or according to equivalent variations made by the scope of the present invention and modification, should all still fall within the scope that the present invention covers.
Claims (9)
1. a kind of test macro for Fracture System heat exchange efficiency, which is characterized in that including water tank (1), surge chamber (5),
Water injecting pump (11), heat exchange kettle (15), suction pump (21) and waste liquid cylinder (25), wherein cold water, water storage are filled in water tank (1)
The entrance of water outlet connection surge chamber (5) of tank (1), the outlet of surge chamber (5) is by water injecting pump (11) connection heat exchange kettle (15)
Entrance, the entrance of the outlet of heat exchange kettle (15) by suction pump (21) connection waste liquid cylinder (25), heat exchange kettle offers on (15)
Exhaust valve；
Several rock rock samples are placed in heat exchange kettle (15), form different slit systems；
Heating device is provided on surge chamber (5) and rock rock sample.
2. a kind of test macro for Fracture System heat exchange efficiency according to claim 1, which is characterized in that surge chamber
(5) heating device being arranged in includes primary heater (6).
3. a kind of test macro for Fracture System heat exchange efficiency according to claim 1, which is characterized in that rock rock
The heating device being arranged on sample includes secondary heater (18).
4. a kind of test macro for Fracture System heat exchange efficiency according to claim 1, which is characterized in that surge chamber
(5) the first thermo detector (7) are provided in.
5. a kind of test macro for Fracture System heat exchange efficiency according to claim 1, which is characterized in that heat exchange kettle
(15) the second thermo detector (16) are provided in.
6. a kind of test macro for Fracture System heat exchange efficiency according to claim 1, which is characterized in that rock rock
Third thermo detector (19) are provided on sample (17).
7. a kind of application method of the test macro for Fracture System heat exchange efficiency, which is characterized in that based on claim 1 to
A kind of test macro for Fracture System heat exchange efficiency described in any one of 6, comprising the following steps:
Step 1, according to simulated object, the experiment parameter of heat exchange models is set, the experiment parameter includes the note of heat exchange kettle (15)
Enter water initial temperature Tw0, rock sample initial temperature Tr0, rock sample lithology, reaction time t and two adjacent rocks
Spacing l between samplei, wherein the thickness h of rock sample and heat exchange kettle (15) are contour；
Step 2, the experiment parameter set according to step 1 chooses rock sample, and according between the rock sample of setting
Away from the rock sample of selection is placed in heat exchange kettle (15)；
Step 3, the cold water in water tank (1) is injected into surge chamber (5) and is heated to preset injection water initial temperature Tw0；
Step 4, by rock sample (17) heating until preset temperature Tr0, exhaust valve is opened, is opened water injecting pump (11), to heat exchange kettle
(15) warmed-up water is filled in rapidly, closes exhaust valve；
Step 5, after reaction time t, the temperature of hot water in the temperature and heat exchange kettle (15) of rock sample is measured, respectively obtains and changes
Hot water final temperature T in hot kettle (15)wiWith the final temperature T of rock sampleri；
Step 6, the hot water final temperature T in heat exchange kettle (15) obtained according to step 5wiWith the final temperature T of rock sampleriMeter
Calculate the fracture spacing, heat exchange area and heat exchange efficiency of i-th of Fracture System.
8. a kind of application method of test macro for Fracture System heat exchange efficiency according to claim 7, feature
It is, in step 6, is calculate by the following formula the fracture spacing D of i-th of Fracture Systemi:
It is calculate by the following formula the heat exchange area S of i-th of Fracture Systemi:
Si=4ni·li·h
In formula, niFor the quantity of rock rock sample in i-th of Fracture System；
It is calculate by the following formula the heat exchange efficiency ε of i-th of Fracture Systemi:
In formula, QiFor practical heat exchange amount；QimaxIt can heat exchange amount for theoretical maximum；
Qi=cw·mw·(Twi-Tw0)
=cw·ρw·Vw·(Twi-Tw0)
=cw·ρw·(Vtotal-Vr)·(Twi-Tw0)
In formula, cwRepresent the specific heat capacity of water, ρwRepresent the density of water, VtotalRepresent the total volume of heat exchange kettle (15), VrRepresent rock
The total volume of rock sample (17)；
In formula, crRepresent the specific heat capacity of rock rock sample, ρrRepresent the density of rock rock sample.
9. a kind of application method of test macro for Fracture System heat exchange efficiency according to claim 7, feature
It is, the temperature of the water injected in water tank (1) is less than or equal to the injection water initial temperature T of heat exchange kettle (15)w0；Rock rock sample
(17) initial temperature is less than or equal to the initial temperature T of rock sampler0。
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| CN117489983A (en) * | 2023-12-29 | 2024-02-02 | 江苏常氢科技工程研究院有限公司 | Station hydrogen storage tank and hydrogen storage tank conveying device |
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| CN206756728U (en) * | 2017-04-28 | 2017-12-15 | 东北师范大学 | A kind of good conductor thermal conductivity factor experiment instrument |
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| JP2017194323A (en) * | 2016-04-19 | 2017-10-26 | 京都電子工業株式会社 | Heat transfer coefficient meter |
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| CN117489983A (en) * | 2023-12-29 | 2024-02-02 | 江苏常氢科技工程研究院有限公司 | Station hydrogen storage tank and hydrogen storage tank conveying device |
| CN117489983B (en) * | 2023-12-29 | 2024-04-02 | 江苏常氢科技工程研究院有限公司 | Station hydrogen storage tank and hydrogen storage tank conveying device |
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