CN109141952A - A kind of U-shaped well formula performance testing device of heat exchanger of mid-deep strata and method - Google Patents
A kind of U-shaped well formula performance testing device of heat exchanger of mid-deep strata and method Download PDFInfo
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- CN109141952A CN109141952A CN201811039747.2A CN201811039747A CN109141952A CN 109141952 A CN109141952 A CN 109141952A CN 201811039747 A CN201811039747 A CN 201811039747A CN 109141952 A CN109141952 A CN 109141952A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/002—Thermal testing
Abstract
A kind of U-shaped well formula performance testing device of heat exchanger of mid-deep strata of the present invention and method, the device include distributed metal armouring optical cable temperature measuring equipment, optical fiber temperature-measurement data collector, water pump, y-type filter, calorimeter, buffer tank, chemicals dosing plant and two water chiller-heater units etc.；When test, it further include the U-shaped well formula heat exchange jackets of two mid-deep stratas, the U-shaped well formula heat exchange jackets of first mid-deep strata are the straight well section on the left side, the U-shaped well formula heat exchange jackets of second mid-deep strata are that the straight well section on the right adds the horizontal segment of bottom, mid-deep strata U-shaped well formula heat exchange jackets in both sides are in closed connected state, are closed on the outside of junction with cementing concrete；The present invention is for the U-shaped well formula heat exchanger performance test of mid-deep strata, by designing under different operating conditions, different flow rates, different take heat and different runing time at different inlet water temperatures, accurate evaluation is made to the above-mentioned U-shaped well formula heat exchanger performance of mid-deep strata in the shortest possible time, to provide reference to Regional Distribution.
Description
Technical field
The invention belongs to the U-shaped well formula heat exchanger performance the field of test technology of mid-deep strata more particularly to a kind of U-shaped wells of mid-deep strata
Formula performance testing device of heat exchanger and method.
Background technique
There are many influence factor of mid-deep strata U-shaped well formula heat exchanger performance test, as the flow rate of recirculated water in pipe laying, pipe laying into
Saliva temperature, pipe laying take heat etc..In order to obtain more valuable information as far as possible in the shortest possible time, it is necessary to right
The experiment carries out science and careful design from period planning and parameter change.
Summary of the invention
The purpose of the present invention is to provide a kind of U-shaped well formula heat exchanger performance test methods of mid-deep strata, more than being directed to
The mid-deep strata U-shaped well formula heat exchanger performance test, by designing under different operating conditions, different flow rates, different inlet water temperatures,
Different takes heat and different runing time, exchanges heat in the shortest possible time to the above-mentioned U-shaped well formula of mid-deep strata
Device performance makes accurate evaluation, to provide reference to Regional Distribution.
The present invention adopts the following technical scheme that realize:
A kind of U-shaped well formula performance testing device of heat exchanger of mid-deep strata, including distributed metal armouring optical cable temperature measuring equipment, light
Fine temperature measurement data collector, water pump, y-type filter, calorimeter, buffer tank, chemicals dosing plant, the first water chiller-heater unit and second
Water chiller-heater unit；Wherein,
It further include the U-shaped well formula heat exchange jackets of the first mid-deep strata and the U-shaped well formula heat exchanger set of the second mid-deep strata when test
Pipe, the U-shaped well formula heat exchange jackets of the first mid-deep strata are the straight well section on the left side, and the U-shaped well formula heat exchange jackets of the second mid-deep strata are the right side
The straight well section on side adds the horizontal segment of bottom, and mid-deep strata U-shaped well formula heat exchange jackets in both sides are in closed connected state, outside junction
It is closed with cementing concrete side；
Sleeve outer wall, light are fixed by protector for optical fiber and strapping and be close to distributed metal armouring optical cable temperature measuring equipment
Cable above ground portion connects optical fiber temperature-measurement data collector, records every meter of one data of record per minute；The U-shaped well formula of second mid-deep strata
The outlet of heat exchange jackets is connect with the import of the U-shaped well formula heat exchange jackets of the first mid-deep strata, the U-shaped well formula heat exchange of the first mid-deep strata
The outlet of device casing and the entrance of y-type filter connect, and the outlet of y-type filter and the entrance of calorimeter connect, calorimeter
Outlet is connect with the entrance of the entrance of the first water chiller-heater unit and the second water chiller-heater unit respectively, the outlet of the first water chiller-heater unit
It being connect with the entrance of buffer tank with the outlet of the second water chiller-heater unit, the outlet of buffer tank and the entrance of water pump connect,
The entrance of the outlet of chemicals dosing plant and water pump connects simultaneously, outlet and the U-shaped well formula heat exchange jackets of the second mid-deep strata of water pump
Entrance connection；Y-type filter is used for impurity screening, and calorimeter metering and record thermal data, buffer tank are used for open system
Test, for chemicals dosing plant for adding drug, the first water chiller-heater unit adjusts water temperature for adjusting water temperature, in the first water chiller-heater unit
After do not reach requirement or the case where the first water chiller-heater unit failure starts the second water chiller-heater unit.
A further improvement of the present invention lies in that the horizontal segment of the U-shaped well formula heat exchange jackets of the second mid-deep strata bottom on the right
Length is greater than 500m.
A further improvement of the present invention lies in that further including high water tank, the outlet of high water tank and the outlet of buffer tank
Connection, for supplementing the loss of device water circulation.
A further improvement of the present invention lies in that outlet and the y-type filter of the first mid-deep strata U-shaped well formula heat exchange jackets
First pressure sensor, the first temperature sensor, first flow sensor, the tenth gold medal are disposed on the pipeline of entrance connection
Belong to hard seal butterfly valve and first row air valve；
Third temperature sensor and third stream are provided on the pipeline of the entrance connection of the outlet and calorimeter of y-type filter
Quantity sensor；
Third pressure sensor, are provided on the pipeline that the outlet of calorimeter is connect with the entrance of the first water chiller-heater unit
Six metal hard-sealing butterfly valves, the 7th temperature sensor and third flexible joint；
Third pressure sensor, are provided on the pipeline that the outlet of calorimeter is connect with the entrance of the second water chiller-heater unit
Eight metal hard-sealing butterfly valves, the 9th temperature sensor and the 7th flexible joint；
The 5th flexible joint, the are provided on the pipeline of the entrance of the outlet of first water chiller-heater unit and buffer tank connection
Eight temperature sensors, the 7th metal hard-sealing butterfly valve, the 5th pressure sensor and the 4th metal hard-sealing butterfly valve；
The 9th flexible joint, the are provided on the pipeline of the entrance of the outlet of second water chiller-heater unit and buffer tank connection
Ten temperature sensors, the 9th metal hard-sealing butterfly valve, the 5th pressure sensor and the 4th metal hard-sealing butterfly valve；
The 5th temperature sensor and the 6th temperature sensor, and outlet and the entrance of buffer tank are provided on buffer tank
It is connected by pipeline, fifth metal hard seal butterfly valve is provided on the pipeline；
Third metal hard-sealing butterfly valve, the 4th pressure are provided on the pipeline of the entrance connection of the outlet and water pump of buffer tank
Force snesor, the 4th temperature sensor, the second metal hard-sealing butterfly valve and the second flexible joint；
Chemicals dosing plant includes dosing tank, is provided with the second band method on the pipeline of the entrance connection of the outlet and water pump of dosing tank
Blue valve, metering pump and first band flange valve；
It is soft that first is provided on the pipeline that the outlet of water pump is connect with the entrance of the U-shaped well formula heat exchange jackets of the second mid-deep strata
Property connector, check-valves, the first metal hard-sealing butterfly valve, second row air valve, the 11st metal hard-sealing butterfly valve, second pressure sensing
Device, second temperature sensor and second flow sensor；
First water chiller-heater unit forms circulation loop, the second water chiller/heater by the 4th flexible joint and the 6th flexible joint
Group forms circulation loop by the 8th flexible joint and the tenth flexible joint.
A kind of U-shaped well formula heat exchanger performance test method of mid-deep strata, this method are based on a kind of above-mentioned U-shaped well formula of mid-deep strata and change
Hot device performance testing device, comprising the following steps:
1) before test starts, it is ensured that fifth metal hard seal butterfly valve is in close state, the third gold at buffer tank both ends
Belong to hard seal butterfly valve and the 4th metal hard-sealing butterfly valve is in the open state, opens the first water chiller-heater unit, water temperature is allowed to be maintained at
12 DEG C, water pump is opened according to the requirement of experimental design, arrival end flow is adjusted to 24m first3/ h, runing time 72h, it is extensive
Multiple time 360h；Arrival end flow is adjusted to 50m3/ h, runing time 72h, recovery time 360h；According to live operating condition
Adjust a suitable flow, runing time 72h, recovery time 360h；Arrival end flow is adjusted to 37m3/ h, runing time
72h, recovery time 360h；The heat exchange property of the U-shaped well formula heat exchanger of mid-deep strata is tested by the variation of flow and recovery process；
2) the third metal hard-sealing butterfly valve and the 4th metal hard-sealing butterfly valve at buffer tank both ends still open holding extremely
Open type mode stabilizes to 37m by opening water pump control inlet flow rate3/ h opens the first water chiller-heater unit and controls inlet temperature
Variation, is adjusted to 7 DEG C, runing time 72h, recovery time 360h for inlet temperature first；Inlet temperature is adjusted to 17 DEG C, fortune
Row time 72h, recovery time 360h；The U-shaped well formula heat exchanger of mid-deep strata is tested by the variation of inlet temperature and recovery process
Heat exchange property；
3) third metal hard-sealing butterfly valve and the 4th the metal hard-sealing butterfly valve closing at buffer tank both ends, fifth metal are hard
Sealed butterfly valve open state is adjusted to enclosed mode, opens water pump, and control inlet flow rate stabilizes to 37m3It is cold and hot to open first by/h
Water dispenser group will take heat to adjust to 0.45MW, runing time 72h, recovery time 360h；Heat will be taken to adjust to 0.65MW, fortune
Row time 72h, recovery time 360h；One is adjusted according to field condition suitably takes heat, runing time 72h, recovery time
360h；Heat will be taken to adjust to 0.55MW, runing time 120h, recovery time 360h；By taking the variation of heat and restoring
The heat exchange property of the journey test U-shaped well formula heat exchanger of mid-deep strata.
The present invention has following beneficial technical effect:
The U-shaped well formula performance testing device of heat exchanger of a kind of mid-deep strata provided by the invention passes through using experiment in situ
The working condition for controlling each component in test device can really and accurately reflect the U-shaped well heat exchange of mid-deep strata under various complex working conditions
The exchange capability of heat of device；In system period out of service, can long term monitoring formation temperature, it is attached to grasp the U-shaped well heat exchanger of mid-deep strata
The distribution of near-earth thermal field and recovery rule.
The U-shaped well formula heat exchanger performance test method of a kind of mid-deep strata provided by the invention, using orthogonal design, as far as possible
A variety of variable working condition tests are completed in few time, and the heat exchange of the U-shaped well heat exchanger of mid-deep strata is sufficiently reflected by open type contrived experiment
Ability reacts the exchange capability of heat of the U-shaped well heat exchanger of mid-deep strata under the service condition of user end by enclosed contrived experiment.
Detailed description of the invention
Fig. 1 is the U-shaped well formula heat exchanger performance test schematic of mid-deep strata provided in of the embodiment of the present invention.In attached drawing
Facial canal diameter is DN200.
Description of symbols: 1, the U-shaped well formula heat exchange jackets of the first mid-deep strata, the U-shaped well formula heat exchanger of the 2, second mid-deep strata
Casing；3, distributed metal armouring optical cable temperature measuring equipment；4, optical fiber temperature-measurement data collector；
5, first pressure sensor, 8, second pressure sensor, 23, third pressure sensor, the 25, the 4th pressure sensing
Device, the 28, the 5th pressure sensor；
6, the first temperature sensor, 9, second temperature sensor, 20, third temperature sensor, the 24, the 4th temperature sensing
Device, the 30, the 5th temperature sensor, the 31, the 6th temperature sensor, the 37, the 7th temperature sensor, the 45, the 8th temperature sensor,
46, the 9th temperature sensor, the 54, the tenth temperature sensor；
7, first flow sensor, 10, second flow sensor, 21, third flow sensor；
11, the first metal hard-sealing butterfly valve, the 16, second metal hard-sealing butterfly valve, 26, third metal hard-sealing butterfly valve, 29,
4th metal hard-sealing butterfly valve, 32, fifth metal hard seal butterfly valve, the 41, the 6th metal hard-sealing butterfly valve, the 42, the 7th metallic hard
Sealed butterfly valve, the 47, the 8th metal hard-sealing butterfly valve, the 51, the 9th metal hard-sealing butterfly valve, the 55, the tenth metal hard-sealing butterfly valve,
56, the 11st metal hard-sealing butterfly valve；
12, check-valves；
13, the first flexible joint, the 15, second flexible joint, 38, third flexible joint, the 40, the 4th flexible joint, 43,
Five flexible joints, the 44, the 6th flexible joint, the 48, the 7th flexible joint, the 50, the 8th flexible joint, the 52, the 9th flexible joint,
53, the tenth flexible joint；
14, water pump；
17, first row air valve, 57, second row air valve；
18, high water tank；19, y-type filter；22, calorimeter；27, buffer tank；
33, first band flange valve, the 35, second band flange valve；
34, metering pump；
36, chemicals dosing plant；
39, the first water chiller-heater unit, the 49, second water chiller-heater unit.
The constant pipe laying import and export simulation water temperature for taking U-shaped buried Guan Yi Heating Season when heat 0.65MW of Fig. 2 is illustrated
Figure.
Pipe laying exit water temperature and front and back temperature fluctuation in last 12 hours change with time schematic diagram when Fig. 3 experiment operation.
Specific embodiment
The present invention is made further instructions with reference to the accompanying drawings and examples.
As shown in Figure 1, the U-shaped well formula performance testing device of heat exchanger of a kind of mid-deep strata provided by the invention, including distribution
Metal armouring optical cable temperature measuring equipment 3, optical fiber temperature-measurement data collector 4, water pump 14, high water tank 18, y-type filter 19, heat
Table 22, buffer tank 27, chemicals dosing plant 36, the first water chiller-heater unit 39 and the second water chiller-heater unit 49.
It further include the U-shaped well formula heat exchange jackets 1 of the first mid-deep strata and the U-shaped well formula heat exchanger set of the second mid-deep strata when test
Pipe 2, the U-shaped well formula heat exchange jackets 1 of the first mid-deep strata are the straight well section on the left side, and the U-shaped well formula heat exchange jackets 2 of the second mid-deep strata are
The straight well section on the right adds the horizontal segment of bottom, and mid-deep strata U-shaped well formula heat exchange jackets in both sides are in closed connected state, junction
It is closed with cementing concrete in outside.
Sleeve outer wall is fixed by protector for optical fiber and strapping and be close to distributed metal armouring optical cable temperature measuring equipment 3,
Optical cable above ground portion connects optical fiber temperature-measurement data collector 4, records every meter of one data of record per minute；Second mid-deep strata is U-shaped
The outlet of well formula heat exchange jackets 2 is connect with the import of the U-shaped well formula heat exchange jackets 1 of the first mid-deep strata, the U-shaped well of the first mid-deep strata
The outlet of formula heat exchange jackets 1 is connect with the entrance of y-type filter 19, the outlet of y-type filter 19 and the entrance of calorimeter 22
Connection, the outlet of calorimeter 22 are connect with the entrance of the entrance of the first water chiller-heater unit 39 and the second water chiller-heater unit 49 respectively,
The outlet of first water chiller-heater unit 39 and the outlet of the second water chiller-heater unit 49 are connect with the entrance of buffer tank 27, buffered water
The outlet of case 27 is connect with the entrance of water pump 14, while the outlet of chemicals dosing plant 36 is connect with the entrance of water pump 14, water pump 14
Outlet is connect with the entrance of the U-shaped well formula heat exchange jackets 2 of the second mid-deep strata；High water tank 18 is used to supplement device water circulation
Loss, y-type filter 19 are used for impurity screening, and the metering of calorimeter 22 and record thermal data, buffer tank 27 are used for open type system
Unified test examination, chemicals dosing plant 36 is for adding drug, and the first water chiller-heater unit 39 is for adjusting water temperature, in the first water chiller-heater unit 39
It is not reached requirement after adjusting water temperature or the case where the first 39 failure of water chiller-heater unit starts the second water chiller-heater unit 49.
In addition, the pipeline that the outlet of the U-shaped well formula heat exchange jackets 1 of the first mid-deep strata is connect with the entrance of y-type filter 19
On be disposed with first pressure sensor 5, the first temperature sensor 6, first flow sensor 7, the tenth metal hard-sealing butterfly
Valve 55 and first row air valve 17；Third temperature is provided on the pipeline that the outlet of y-type filter 19 is connect with the entrance of calorimeter 22
Spend sensor 20 and third flow sensor 21；The pipeline that the outlet of calorimeter 22 is connect with the entrance of the first water chiller-heater unit 39
On be provided with third pressure sensor 23, the 6th metal hard-sealing butterfly valve 41, the 7th temperature sensor 37 and third flexible joint
38；Be provided on the pipeline that the outlet of calorimeter 22 is connect with the entrance of the second water chiller-heater unit 49 third pressure sensor 23,
8th metal hard-sealing butterfly valve 47, the 9th temperature sensor 46 and the 7th flexible joint 48；The outlet of first water chiller-heater unit 39
The 5th flexible joint 43, the 8th temperature sensor 45, the 7th metal are provided on the pipeline connecting with the entrance of buffer tank 27
Hard seal butterfly valve 42, the 5th pressure sensor 28 and the 4th metal hard-sealing butterfly valve 29；The outlet of second water chiller-heater unit 49 with
The 9th flexible joint 52, the tenth temperature sensor 54, the 9th metallic hard are provided on the pipeline of the entrance connection of buffer tank 27
Sealed butterfly valve 51, the 5th pressure sensor 28 and the 4th metal hard-sealing butterfly valve 29；The 5th temperature is provided on buffer tank 27
Sensor 30 and the 6th temperature sensor 31, and the outlet of buffer tank 27 is connect with entrance by pipeline, is arranged on the pipeline
There is fifth metal hard seal butterfly valve 32；Third gold is provided on the pipeline that the outlet of buffer tank 27 is connect with the entrance of water pump 14
It is soft to belong to hard seal butterfly valve 26, the 4th pressure sensor 25, the 4th temperature sensor 24, the second metal hard-sealing butterfly valve 16 and second
Property connector 15；Chemicals dosing plant 36 includes dosing tank, and the is provided on the pipeline that the outlet of dosing tank is connect with the entrance of water pump 14
Two band flange valves 35, metering pump 34 and first band flange valve 33；The outlet of water pump 14 and the U-shaped well formula of the second mid-deep strata exchange heat
Device casing 2 entrance connection pipeline on be provided with the first flexible joint 13, check-valves 12, the first metal hard-sealing butterfly valve 11,
Second row air valve 57, the 11st metal hard-sealing butterfly valve 56, second pressure sensor 8, second temperature sensor 9 and second flow
Sensor 10；First water chiller-heater unit 39 forms circulation loop by the 4th flexible joint 40 and the 6th flexible joint 44, and second
Water chiller-heater unit 49 forms circulation loop by the 8th flexible joint 50 and the tenth flexible joint 53.
The U-shaped well formula heat exchanger performance test method of a kind of mid-deep strata provided by the invention, comprising the following steps:
1) before test starts, it is ensured that fifth metal hard seal butterfly valve 32 is in close state, and the of 27 both ends of buffer tank
Three metal hard-sealing butterfly valves 26 and the 4th metal hard-sealing butterfly valve 29 are in the open state, open the first water chiller-heater unit 39, allow
Water temperature is maintained at 12 DEG C, opens water pump 14 according to the requirement of experimental design and arrival end flow is adjusted to 24m first3/ h, fortune
Row time 72h, recovery time 360h；Arrival end flow is adjusted to 50m3/ h, runing time 72h, recovery time 360h；According to
Live operating condition adjusts a suitable flow, runing time 72h, recovery time 360h；Arrival end flow is adjusted to
37m3/ h, runing time 72h, recovery time 360h；The U-shaped well formula heat exchange of mid-deep strata is tested by the variation of flow and recovery process
The heat exchange property of device；
2) the third metal hard-sealing butterfly valve 26 and the 4th metal hard-sealing butterfly valve 29 at 27 both ends of buffer tank are still opened
It keeps to open type mode, stabilizes to 37m by opening the control inlet flow rate of water pump 143/ h opens the control of the first water chiller-heater unit 39
Inlet temperature variation processed, is adjusted to 7 DEG C, runing time 72h, recovery time 360h for inlet temperature first；By inlet temperature tune
Whole is 17 DEG C, runing time 72h, recovery time 360h；The U-shaped well of mid-deep strata is tested by the variation of inlet temperature and recovery process
The heat exchange property of formula heat exchanger；
3) third metal hard-sealing butterfly valve 26 and the 4th metal hard-sealing butterfly valve 29 closing at 27 both ends of buffer tank, the 5th
32 open state of metal hard-sealing butterfly valve is adjusted to enclosed mode, opens water pump 14, and control inlet flow rate stabilizes to 37m3/ h, is opened
The first water chiller-heater unit 39 is opened, heat will be taken to adjust to 0.45MW, runing time 72h, recovery time 360h；Heat will be taken to adjust
To 0.65MW, runing time 72h, recovery time 360h；One is adjusted according to field condition suitably takes heat, runing time
72h, recovery time 360h；Heat will be taken to adjust to 0.55MW, runing time 120h, recovery time 360h；By taking heat
The heat exchange property of variation and the recovery process test U-shaped well formula heat exchanger of mid-deep strata.
Embodiment
The U-shaped well formula heat-exchange system underground part of mid-deep strata is made of straight well and horizontal well two parts, and two mouthfuls of wells are in well
Lower sealing connection.Recirculated water in system flows downwardly into pipe laying from well head by horizontal well, in downward, horizontal segment and flows up
During absorb the heat of periphery ground, temperature gradually rises, and has the casing of certain depth to use at straight well (wet well)
Thermal insulation casing, the water being heated finally flow out the heat-exchange system (heat pump unit) that pipe laying enters ground by straight well section upwards,
(evaporator) releases heat in heat exchanger, and temperature is again introduced into pipe laying after reducing, and so recycles.
The monitoring instrument device distribution: (1) temperature sensor is arranged: being respectively set two in the import and export of each pipe laying
It is a；It is arranged two in buffer tank cabinet；It is arranged one on each loop of buffer tank outlet；In the first water chiller-heater unit and
Each setting one of the inlet and outlet of second water chiller-heater unit.(2) arrangement of pressure sensor: distinguish in the import and export of each pipe laying
Setting one；One is respectively arranged in the two sides of pump；One is respectively arranged in heat pump unit import and export.(3) cloth of flow sensor
It sets: being respectively arranged one in each pipe laying import and export；(considering whether have leak in pipe laying part), in the import of heat pump unit
Setting one.(4) distributed metal armouring optical cable temperature measuring equipment: using binding, clamp fixed form；Each vertical shaft arranges two
Optical cable.
The U-shaped well formula heat exchanger performance test method of a kind of mid-deep strata provided by the invention, comprising the following steps:
(1) experimental design: 1. it is arranged to two kinds of systems of open type and enclosed；2. determining experiment condition；3. determining imbedded pipe heat-exchanging
Operation reaches stable and well temperature recovery time；4. with orthogonal experimental design method by different temperatures, flow, take heat and depth to be divided into
3 groups of experiments.
(2) heat exchange measuring system buffer tank valve opening is adjusted to open type mode, is controlled by water chiller-heater unit permanent
Determine inlet temperature, controls entrance variable flow with water pump, each flow is run according to the runing time of design, according to the extensive of design
The multiple time waits, and the data recording of whole process is successively tested to the heat exchange situation of different inlet flow rates after complete.
(3) heat exchange measuring system buffer tank valve still opens holding to open type mode, is controlled by entrance water pump permanent
Determine inlet flow rate, with water chiller-heater unit control inlet temperature variation, each temperature is run according to the runing time of design, according to setting
The recovery time of meter waits, and the data recording of whole process is successively tested to the heat exchange situation of different inlet temperatures after complete.
(4) closing of heat exchange measuring system buffer tank valve is adjusted to enclosed mode, is controlled by entrance water pump constant
Inlet flow rate takes thermal change with water chiller-heater unit control, each takes heat to run according to the runing time of design, according to design
Recovery time wait, by the data recording of whole process, successively test difference takes the heat exchange situations of heat after complete.
Specifically, the present invention the following steps are included:
1) experimental design
101) open circulation of the constant inlet water temperature under different flow
To reduce total experiment number, three kinds of flow rate operating conditions are set altogether.Flow rate determines first according to related standard criterion
Limitation determines minimum and maximum flow, and the principle followed is pipe laying maximum flow of water rate limitation, optimal specific frictional head loss range and defeated
Send the limitation of energy consumption ratio.Pipe laying water velocity and optimal specific frictional head loss are considered by heating system.According to " national civil building engineering
Designing technique measure " (2009) Heating,Ventilating and Air Conditioning power and " civil buildings heating ventilator and In Air Conditioning Design specification " GB
50736-2012 considers that the maximum flow rate of general occasion is 2m/s first.Table 1 is flow rate and specific frictional resistance under different in flow rate.U
The pipe laying size of moldeed depth pipe laying are as follows: water inlet pipe and outlet pipe are 139.7 × 7.72mm of Φ.
Table 1U type well recirculated water flow rate is with the specific frictional resistance of pipe laying
Referring to " State Technical Method for Civil Building Project " (2009) Heating,Ventilating and Air Conditioning power, hot water trunk line length
When greater than 1000m, the average specific frictional head loss of backbone be can choose in 30~120Pa/m.In conjunction with the calculated result of table 2-2, controlling
When pipe laying recirculated water flow rate processed for guarantee pipe laying specific frictional resistance maximum be no more than 120Pa/m, then circulation flow-rate maximum no more than
13.95kg/s(50.21m3/h)；Guarantee that pipe laying specific frictional resistance minimum is no less than 30Pa/m to determine that circulation flow-rate minimum is unsuitable small
In 6.67kg/s (24m3/h)。
In conclusion final experiment flow rate determines are as follows: maximum experiment flow rate 50m3/ h (13.95kg/s, flow velocity 1.15m/
S), minimum experiment flow rate is 24m3/ h (6.67kg/s, flow velocity 0.55m/s), intermediate flow rate are 37m3/ h (10.27kg/s, flow velocity
0.85m/s).Inlet water temperature is constant 12 DEG C.
It in an experiment, can be according to the bearing capacity of the performance and pipeline of water pump, equipment, by analytic demonstration by flow rate into one
Step improves, and increases an experiment condition.
102) form circulation of the constant current rate under different inflow temperatures
After open system quantity of circulating water has been determined, determine that pipe laying enters saliva by changing different constant inlet water temperatures
Influence of the temperature to U-shaped buried pipe heat-exchange system heat exchange property.
According to the pipe laying being likely to occur in pipe laying supply and return water temperature and system operation common in Practical Project into
Mouth water temperature condition, devises three kinds of inlet water temperatures, respectively 7 DEG C, 12 DEG C and 17 DEG C here.Flow rate selects 37m3/h
(10.27kg/s, flow velocity 0.85m/s).
103) constant current rate it is different it is constant take heat under closed cycle
The purpose of the experiment is to observe buried pipe heat-exchange system under conventional constant flow rate being arranged and different take heat
When, the variation characteristic of pipe laying supply and return water temperature.Wherein pipe laying flow rate selects 37m3/ h (10.27kg/s, flow velocity 0.85m/s).
It is calculated according to relevant simulation, U-shaped buried pipe heat-exchange system is guaranteeing a Heating Season inlet water temperature not less than 4 DEG C
Under conditions of maximum imbedded pipe heat-exchanging amount be 0.65MW, the pipe laying rate of flow of water of the calculating operating condition is 48m3/ h is (close to maximum flow rate
50m3/h).Fig. 2 is that the constant pipe laying import and export for taking U-shaped buried Guan Yi Heating Season when heat 0.65MW simulates water temperature.
From Figure 2 it can be seen that pipe laying is in flow rate 48m3When/h, guarantee that the inlet water temperature at the end of a Heating Season is not less than 4 DEG C
Under the conditions of pipe laying maximum constant heat exchange load be 0.65MW.Therefore the heat that takes of constant heat exchange load condition design is respectively
0.65MW,0.55MW,0.45MW.Flow rate selects 37m3/h。
In an experiment, according to the performance of heat pump unit, heat can will be taken further to increase, and will increase an experiment condition.
104) different experiments duration determines constant flow rate and takes closed cycle under heat
To " constant current rate it is different it is constant take heat under closed cycle ", select intermediate flow rate 37m3/ h, centre take heat
0.55MW runs to 120h, observes the variation of the water-in and water-out temperature of 72h to 120h.
Experiment condition is set above.In an experiment can be as needed, under conditions of technical feasibility, pipe network system safety
Carry out adjustment appropriate and supplement.
105) duration that pipe laying outlet temperature tends towards stability under constant inlet temperature
When system brings into operation, water temperature changes very greatly from high to low, and temperature reduction variation tends to be steady after a period of time.It presses
According to the ground thermal response requirement of experiment of soil source heat pump, the judgement that temperature tends towards stability is that in 12 hours, pipe laying goes out water temperature
Degree front and back difference is not more than 1 DEG C.Buried pipe heat exchange property is tested, the stability concept of shallow buried tube is used for reference, it is possible thereby to determine
Reach runing time required for stablizing, this time is as runing time most basic required for each operating condition.This section exists
Set (0.65MW) under the premise of maximum heat exchange load to buried pipe, respectively simulation calculate experiment carry out 48h, 60h, 72h,
Pipe laying exit water temperature when 84h, 96h, 108h tends towards stability, and (operating condition is selected as D3A3C2 to situation: taking heat 0.65MW, flow rate
48m3The setting of other relevant parameters of/h is referring to above U-shaped buried pipe numerical value computation modeling part).Table 2-8 gives each
Temperature fluctuation under operation duration in 12h.Wherein the calculating of exit water temperature fluctuation (DEG C/h) situation is referring to formula (1).
F=Ti-1-Ti (1)
Wherein, F (Fluctuation) indicates the pipe laying temperature fluctuation at each moment, DEG C/h；Ti-1Indicate that moment i-1 is corresponding
Pipe laying exit water temperature, DEG C；TiIndicate the corresponding pipe laying exit water temperature of moment i, DEG C.Because only needing to calculate each operation duration here
Temperature fluctuation in lower 12h, therefore the calculation method of moment i is that total operation duration n subtracts 0~11h, specific calculated result is shown in Table
2。
Temperature fluctuation situation under each operation duration of table 2 in 12h
As can be seen from Table 2, pipe laying total run time is shorter, and the undulating value of last 12 hours front and backs of exit water temperature is corresponding
Bigger, with the lengthening of total run time, last 12 hours Pitching values of exit water temperature are just gradually reduced.It can by table 2
When seeing a length of 48h and 60h when running, the fluctuation of last 12 hours exit water temperatures is respectively 1.5652 DEG C and 1.2142
DEG C, it is all larger than 1 DEG C, hence it is evident that do not meet corresponding regulation[10]；When length increases to 72h when running, going out before and after last 12 hours
Mouth water temperature fluctuation is 0.991 DEG C, that is, is just met for the requirement of specification, reaches stable state；With continuing growing for operation duration
(84h, 96h, 108h), front and back exit water temperature fluctuation in last 12 hours continue to reduce.
By Fig. 3 it can be seen that, pipe laying exit water temperature at experiment initial stage since the influence of mid-deep strata high-temperature water increases rapidly, it
Passage out temperature at any time gradually decreases afterwards, can be seen that from the case where lines slope and temperature fluctuation as the time should
Reduction eases up.
106) recovery time of the soil moisture
In order to determine the reasonable intermittent time of buried well experiment, for the reasonable runing time of pipe laying, as 72h, 84h,
These four operating conditions of 96h, 108h, (heat-exchange system is out of service in convalescence, buries for the calculating of the whole audience of progress convalescence respectively
Pipe rate of flow of water is zero), the temperature field at each moment, including drilling wall surface temperature to be obtained, further according to the temperature computation of first field the wall of a borehole
The recovery rate at drilling wall temperature each moment is obtained, the calculation method for the wall surface temperature resuming rate that drills is referring to formula (2).
Table 3 calculates under different operation durations, and inlet well buried depth is respectively the drilling wall surface temperature of 50m, 1000m, 2000m
Recovery rate with recovery time situation of change.
3 butt shaft of table drills wall surface temperature resuming rate R (%) in different depth
As can be seen from Table 3, the wall surface temperature that drills when system is out of service starts to restore and gradually to initial temperature
It is close.Table 3 clearly reflects the recovery situation that experiment carries out ground when different durations (drilling wall surface) temperature, when experiment duration
When for shorter 72h, restore 20 days (480h) afterwards shallow (50m), in (1000m), the corresponding recovery rate point of deep (2000m) layer ground
Not are as follows: 78.75%, 94.99% and 98.40%, when experiment when a length of longer 108h, it is shallow after restoring 20 days, in, deep layer rock
The corresponding recovery rate of soil is respectively 73.53%, 93.68% and 96.66%, it is seen that after experimental period lengthening, ground temperature exists
Recovery rate reduces in identical recovery time, should reduce experiment to the greatest extent while guaranteeing that experiment exit water temperature is stablized
Duration spends the time in the accuracy and experiment for carrying out just taking into account experiment when multiple groups experiment in this way.
From the point of view of the borehole temperature recovery rate of different depth, the recovery rate of shallow layer drilling wall surface temperature under four kinds of operation durations
It is all low.In view of the more shallow corresponding ground temperature of the wall of a borehole depth is lower, the influence to imbedded pipe heat-exchanging is also smaller, therefore uses here
The ground recovery rate of deep layer (2000m) come evaluation experimental rest during ground recovery situation, when recovery rate reach 95% and with
It is considered that being able to restore substantially and subsequent experiment can be carried out when upper.It can be seen that, reached when a length of 72h when experiment by table 3
Time required for restoring substantially to ground temperature is 288h (12 days), and it is substantially extensive when a length of 84h to reach ground temperature when experiment
Time required for multiple is 312h (13 days), reaches ground temperature when experiment when a length of 96h and restores the required time substantially and is
360h (15 days), reaching the time required for ground temperature is restored substantially when experiment when a length of 108h is 360h (16 days).More than
It is the stable operation duration analyzed using numerical computation method and the prediction for restoring duration.It is recommended that in an experiment, in conjunction with burying
Pipe import and export water temperature and the real-time monitoring value of tube wall temperature carry out adjustment appropriate.
107) experiment condition designs
Table 4 and 5 is U-shaped buried well open system test combinations design conditions, and table 6 is U-shaped buried well closed system experiment
Combination Design operating condition.Listed operation duration and restore duration in table and only make reference, in actual operation visual pipe laying into and out of
Mouth temperature and the real-time monitoring value of vertical tube wall temperature are adjusted it.In report analysis determined experiment condition (be shown in Table 4~
6), in an experiment can be as needed, adjustment appropriate and benefit are carried out under conditions of technical feasibility, pipe network system ensure safety
It fills.Consider within long-pressing 15 days when recovery, 10 experiment conditions are estimated to need total duration for 4368h (182 days).
The U-shaped buried well open system test combinations design of table 4: 1 (constant inlet water temperature difference flow rate) of experiment
The U-shaped buried well open system test combinations design of table 5: 2 (constant flow rate difference inlet water temperatures) of experiment
The U-shaped buried well closed system test combinations design of table 6: 3 (constant flow rate difference takes heat) of experiment
2) buffer tank valve 26,29 in heat exchange measuring system schematic diagram is opened, is adjusted to open type mode, by cold and hot
Water unit allocation inlet temperature stablize at 12 DEG C, guarantees that the temperature of buffer tank is constant (needing external thermal insulation), with water pump 14 control into
Arrival end flow is adjusted to 24m first according to the requirement of experimental design by mouth end flow3/ h, runing time 72h, recovery time
360h；Arrival end flow is adjusted to 50m3/ h, runing time 72h, recovery time 360h；According to live operating condition adjustment one
A suitable flow, runing time 72h, recovery time 360h；Arrival end flow is adjusted to 37m3/ h, runing time 72h, it is extensive
Multiple time 360h；The pressure of above-mentioned test process, temperature, flow and thermal data whole process is taken to enroll.
3) buffer tank valve 26,29 still opens holding to open type mode, by entering in heat exchange measuring system schematic diagram
14 control inlet flow rate of saliva pump stabilizes to 37m3/ h controls heat pump unit with water chiller-heater unit control inlet temperature variation
Leaving water temperature guarantees that the temperature of buffer tank is constant (needing external thermal insulation), inlet temperature is adjusted to 7 DEG C first, runing time
72h, recovery time 360h；Inlet temperature is adjusted to 17 DEG C, runing time 72h, recovery time 360h；Above-mentioned test process
Pressure, temperature, flow and take thermal data whole process enroll.
4) closing of buffer tank valve 26,29 in heat exchange measuring system schematic diagram is adjusted to enclosed mode, passes through entrance
Water pump 14 controls inlet flow rate and stabilizes to 37m3/ h, with water chiller-heater unit control take thermal change, will take heat adjust to
0.45MW, runing time 72h, recovery time 360h；Heat will be taken to adjust to 0.65MW, runing time 72h, recovery time
360h；One is adjusted according to field condition suitably takes heat, runing time 72h, recovery time 360h；To take heat adjust to
0.55MW, runing time 120h, recovery time 360h；The pressure of above-mentioned test process, temperature, flow and take thermal data whole
Admission.
Opposite opened of the present invention and enclosed mode are all tested, and what open type mode had reacted heat-exchanger rig itself takes heat
Amount, enclosed mode reacted analog subscriber is constant take heat mode under operating condition, the present invention by change flow, temperature
It spends, take heat and change operation duration, obtain under different operating conditions different factors to the U-shaped well formula heat exchanger heat-exchange performance of mid-deep strata
The affecting laws of energy, propose the test of multi-state, the multifactor affecting laws to the U-shaped well formula heat exchanger heat exchange property of mid-deep strata
Method.
Claims (5)
1. a kind of U-shaped well formula performance testing device of heat exchanger of mid-deep strata, which is characterized in that surveyed including distributed metal armouring optical cable
Warm equipment (3), optical fiber temperature-measurement data collector (4), water pump (14), y-type filter (19), calorimeter (22), buffer tank
(27), chemicals dosing plant (36), the first water chiller-heater unit (39) and the second water chiller-heater unit (49)；Wherein,
It further include the U-shaped well formula heat exchange jackets (1) of the first mid-deep strata and the U-shaped well formula heat exchange jackets of the second mid-deep strata when test
(2), the U-shaped well formula heat exchange jackets (1) of the first mid-deep strata are the straight well section on the left side, the U-shaped well formula heat exchange jackets of the second mid-deep strata
(2) the straight well section for the right adds the horizontal segment of bottom, and mid-deep strata U-shaped well formula heat exchange jackets in both sides are in closed connected state,
It is closed on the outside of junction with cementing concrete；
Sleeve outer wall, light are fixed by protector for optical fiber and strapping and be close to distributed metal armouring optical cable temperature measuring equipment (3)
Cable above ground portion connects optical fiber temperature-measurement data collector (4), records every meter of one data of record per minute；Second mid-deep strata is U-shaped
The outlet of well formula heat exchange jackets (2) is connect with the import of the U-shaped well formula heat exchange jackets (1) of the first mid-deep strata, the first mid-deep strata U
The outlet of type well formula heat exchange jackets (1) is connect with the entrance of y-type filter (19), the outlet of y-type filter (19) and heat
The entrance of table (22) connects, the outlet of calorimeter (22) respectively with the entrance and the second water chiller/heater of the first water chiller-heater unit (39)
The entrance of group (49) connects, and the outlet of the first water chiller-heater unit (39) and the outlet of the second water chiller-heater unit (49) are and buffered water
The entrance of case (27) connects, and the outlet of buffer tank (27) is connect with the entrance of water pump (14), at the same chemicals dosing plant (36) out
Mouth is connect with the entrance of water pump (14), and the outlet of water pump (14) and the entrance of the U-shaped well formula heat exchange jackets (2) of the second mid-deep strata connect
It connects；Y-type filter (19) is used for impurity screening, calorimeter (22) metering and record thermal data, and buffer tank (27) is for opening
Formula system testing, for chemicals dosing plant (36) for adding drug, the first water chiller-heater unit (39) is cold and hot first for adjusting water temperature
Water dispenser group (39) does not reach requirement after adjusting water temperature or the case where the first water chiller-heater unit (39) failure starts the second hot and cold water
Unit (49).
2. the U-shaped well formula performance testing device of heat exchanger of a kind of mid-deep strata according to claim 1, which is characterized in that second
The U-shaped well formula heat exchange jackets (2) of mid-deep strata on the right bottom horizontal section length be greater than 500m.
3. the U-shaped well formula performance testing device of heat exchanger of a kind of mid-deep strata according to claim 1, which is characterized in that also wrap
It includes high water tank (18), the outlet of high water tank (18) is connect with the outlet of buffer tank (27), is followed for supplementing the device water
The loss of ring.
4. the U-shaped well formula performance testing device of heat exchanger of a kind of mid-deep strata according to claim 1, which is characterized in that first
Is disposed on the pipeline that the outlet of the U-shaped well formula heat exchange jackets (1) of mid-deep strata is connect with the entrance of y-type filter (19)
One pressure sensor (5), the first temperature sensor (6), first flow sensor (7), the tenth metal hard-sealing butterfly valve (55) and
First row air valve (17)；
Third temperature sensor (20) are provided on the pipeline that the outlet of y-type filter (19) is connect with the entrance of calorimeter (22)
With third flow sensor (21)；
Third pressure sensing is provided on the pipeline that the outlet of calorimeter (22) is connect with the entrance of the first water chiller-heater unit (39)
Device (23), the 6th metal hard-sealing butterfly valve (41), the 7th temperature sensor (37) and third flexible joint (38)；
Third pressure sensing is provided on the pipeline that the outlet of calorimeter (22) is connect with the entrance of the second water chiller-heater unit (49)
Device (23), the 8th metal hard-sealing butterfly valve (47), the 9th temperature sensor (46) and the 7th flexible joint (48)；
The 5th flexibility is provided on the pipeline that the outlet of first water chiller-heater unit (39) is connect with the entrance of buffer tank (27) to connect
Head (43), the 8th temperature sensor (45), the 7th metal hard-sealing butterfly valve (42), the 5th pressure sensor (28) and the 4th metal
Hard seal butterfly valve (29)；
The 9th flexibility is provided on the pipeline that the outlet of second water chiller-heater unit (49) is connect with the entrance of buffer tank (27) to connect
Head (52), the tenth temperature sensor (54), the 9th metal hard-sealing butterfly valve (51), the 5th pressure sensor (28) and the 4th metal
Hard seal butterfly valve (29)；
The 5th temperature sensor (30) and the 6th temperature sensor (31), and buffer tank (27) are provided on buffer tank (27)
Outlet connect with entrance by pipeline, fifth metal hard seal butterfly valve (32) are provided on the pipeline；
Third metal hard-sealing butterfly valve is provided on the pipeline that the outlet of buffer tank (27) is connect with the entrance of water pump (14)
(26), the 4th pressure sensor (25), the 4th temperature sensor (24), the second metal hard-sealing butterfly valve (16) and the second flexibility connect
Head (15)；
Chemicals dosing plant (36) includes dosing tank, is provided with second on the pipeline that the outlet of dosing tank is connect with the entrance of water pump (14)
Band flange valve (35), metering pump (34) and first band flange valve (33)；
Is provided on the pipeline that the outlet of water pump (14) is connect with the entrance of the U-shaped well formula heat exchange jackets (2) of the second mid-deep strata
One flexible joint (13), check-valves (12), the first metal hard-sealing butterfly valve (11), second row air valve (57), the 11st metallic hard
Sealed butterfly valve (56), second pressure sensor (8), second temperature sensor (9) and second flow sensor (10)；
First water chiller-heater unit (39) by the 4th flexible joint (40) and the 6th flexible joint (44) formation circulation loop, second
Water chiller-heater unit (49) forms circulation loop by the 8th flexible joint (50) and the tenth flexible joint (53).
5. a kind of U-shaped well formula heat exchanger performance test method of mid-deep strata, which is characterized in that this method is based on described in claim 4
A kind of U-shaped well formula performance testing device of heat exchanger of mid-deep strata, comprising the following steps:
1) before test starts, it is ensured that fifth metal hard seal butterfly valve (32) is in close state, and the of buffer tank (27) both ends
Three metal hard-sealing butterfly valves (26) and the 4th metal hard-sealing butterfly valve (29) are in the open state, open the first water chiller-heater unit
(39), it allows water temperature to be maintained at 12 DEG C, opens water pump (14) and be first adjusted to arrival end flow according to the requirement of experimental design
24m3/ h, runing time 72h, recovery time 360h；Arrival end flow is adjusted to 50m3/ h, runing time 72h, recovery time
360h；A suitable flow, runing time 72h, recovery time 360h are adjusted according to live operating condition；By arrival end flow
It is adjusted to 37m3/ h, runing time 72h, recovery time 360h；The U-shaped well of mid-deep strata is tested by the variation of flow and recovery process
The heat exchange property of formula heat exchanger；
2) the third metal hard-sealing butterfly valve (26) and the 4th metal hard-sealing butterfly valve (29) at buffer tank (27) both ends are still opened
Holding is opened to open type mode, stabilizes to 37m by opening water pump (14) control inlet flow rate3/ h opens the first water chiller-heater unit
(39) control inlet temperature variation, is adjusted to 7 DEG C, runing time 72h, recovery time 360h for inlet temperature first；By entrance
Temperature is adjusted to 17 DEG C, runing time 72h, recovery time 360h；By deep in the variation of inlet temperature and recovery process test
The heat exchange property of the U-shaped well formula heat exchanger of layer；
3) the third metal hard-sealing butterfly valve (26) at buffer tank (27) both ends and the 4th metal hard-sealing butterfly valve (29) close, the
Five metal hard-sealing butterfly valves (32) open state is adjusted to enclosed mode, is opened water pump (14), and control inlet flow rate stabilizes to
37m3/ h opens the first water chiller-heater unit (39), heat will be taken to adjust to 0.45MW, runing time 72h, recovery time 360h；
Heat will be taken to adjust to 0.65MW, runing time 72h, recovery time 360h；One is adjusted according to field condition suitably takes heat
Amount, runing time 72h, recovery time 360h；Heat will be taken to adjust to 0.55MW, runing time 120h, recovery time 360h；It is logical
Cross the heat exchange property of the variation for taking heat and the recovery process test U-shaped well formula heat exchanger of mid-deep strata.
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Address after: No.75, Keji 2nd Road, hi tech Zone, Xi'an City, Shaanxi Province Patentee after: Shaanxi Yanchang Petroleum International Energy Chemical Co.,Ltd. Address before: No.75, Keji 2nd Road, hi tech Zone, Xi'an City, Shaanxi Province Patentee before: SHAANXI YANCHANG PETROLEUM INTERNATIONAL EXPLORATION DEVELOPMENT ENGINEERING CO.,LTD. |