CN102288317A - Underground temperature field monitoring method for ground source heat pump system - Google Patents
Underground temperature field monitoring method for ground source heat pump system Download PDFInfo
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- CN102288317A CN102288317A CN201110123213XA CN201110123213A CN102288317A CN 102288317 A CN102288317 A CN 102288317A CN 201110123213X A CN201110123213X A CN 201110123213XA CN 201110123213 A CN201110123213 A CN 201110123213A CN 102288317 A CN102288317 A CN 102288317A
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Abstract
The invention relates to the technical field of ground source heat pumps, in particular to a method for monitoring an underground temperature field in a ground source heat pump system. The method comprises the following steps: injecting liquid coupling agent into the protective pipe with the lower end closed, and embedding the protective pipe into a monitoring well dug in advance in a one-to-one correspondence manner; arranging a conversion module at each monitoring wellhead, and connecting a plurality of conversion modules with the input end of a data acquisition module through a CAN bus; a waterproof bus connected with a plurality of single-wire digital temperature sensors in parallel is arranged in each protective tube, and the upper end part of the waterproof bus is connected with the conversion module; the single-wire digital temperature sensor collects temperature information and sends the temperature information to the data collection module through a waterproof bus. The advantages are that: the bus type arrangement has high cost performance, reduces the construction cost of the monitoring system and is convenient to construct; the double-layer waterproof process has good waterproof effect, and realizes that the digital sensor can operate for a long time under the waterproof and pressure-resistant process with the pressure resistance of more than 3 MPa.
Description
Technical field
The present invention relates to a kind of ground source heat pump technology field, particularly a kind of underground temperature field monitoring method that is used for earth-source hot-pump system.
Background technology
What present existing underground temperature field monitoring was mainly adopted is platinum resistance temperature sensor temp measuring system, fiber-optical grating temperature sensor temp measuring system.
Platinum resistance temperature sensor temp measuring system principle: the resistance of resistance changes along with temperature variation, such as, with the linear ratio resistance done of platinum filament, copper wire preferably.Industrial heat resistance generally adopts Pt100, Pt10, Pt1000, when being flow through platinum sensor, electric current produces pressure drop thereon, temperature difference, the resistance value difference of platinum sensor, then pressure drop difference, should amplify by faint pressure drop signal by amplifier again, i.e. the voltage signal of output expectation, this signal can be directly connected to the AD conversion chip.When remote (for example greater than 100m) measures transmission, the temperature survey accuracy, systematic measurement error is bigger, influenced by ambient temperature, analog sensor all is that the form with electric signal exists in the course of the work, also often there is electric field in monitoring of environmental, uncertain factors such as magnetic field, these factors can produce bigger interference to electric signal, thereby influence the measuring accuracy of sensor reality and the stability of system, buried platinum resistance temperature sensor grows with time simultaneously, measured temperature can produce certain drift, need calibrate every year, so there is significant limitation the use aspect.Traditional platinum resistor temperature measuring generally adopts single line to connect a platinum sensor, and the sensor package diameter is bigger when adopting transmitter to connect, and the waterproof technology that needs is simultaneously had relatively high expectations.
Optical fiber temperature-measurement principle: the mechanism of optical fiber temperature-measurement is according to the temperature effect of back to raman scattering spectrum.Raman diffused light is made up of the light of anti-Stokes (anti-Stokes) light and two kinds of different wave lengths of Stokes (Stokes) light.The former is responsive especially to temperature, and the latter and temperature relation are very little.For eliminating influences such as light source fluctuation and fibre-optical bending, improve the thermometric accuracy, adopt the ratio of anti-Stokes light and Stokes light intensity to come the demodulation temperature signal, based on the signal Processing of DSP and realize finishing amplification, sampling and processing, and demodulate temperature to diode (APD) photodetector output signal based on the signal processing unit of dsp system.The optical fiber grating temperature-measuring system cost is higher, and mounting process and networking requirement are higher, installs and characteristics such as optical fiber is fragile during later maintenance in wiring.
Traditional temperature monitoring system mainly adopts on-site data gathering, regularly carries out copying data and parameter setting to the scene, then waits until as if situations such as mistake occur and has lost a lot of data when finding.
Two kinds of traditional system costs are comparatively expensive, what adopt is the arrangement of non-bus type, simultaneously can't carry out networking, temperature measurement accuracy can't guarantee after long-distance transmissions, in employing aspect the construction technology sensor being carried out in sensor colligation pipe backfill under the steel pipe outside buries underground, construction is comparatively complicated, and survival rate is lower, and the later stage can't be carried out the precision calibration and be safeguarded; Traditional temp measuring system has just been considered the monitoring of underground temperature field, has only for source heat pump system operation entirely the monitoring of underground temperature field, the buried side out temperature of earth-source hot-pump system and flow are monitored and can be done comprehensive research and evaluation to total system.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part; a kind of underground temperature field monitoring method that is used for earth-source hot-pump system is provided; this method is by being provided with the protection tube that wherein is marked with couplant; and in protection tube, lay bus 1-wire digital temperature sensor that connect, that have the waterproof encapsulated layer; remedied the construction complexity that exists in the prior art; the temperature sensor survival rate is low, the problem that the later stage can't be carried out the precision calibration and be safeguarded.
The object of the invention realizes being finished by following technical scheme:
A kind of underground temperature field monitoring method that is used for earth-source hot-pump system, this method passes through to measure the temperature of some monitor wells to realize the monitoring of underground temperature field, it is characterized in that having following steps: liquid couplant will be injected in the protection tube of lower end closed, and corresponding one by one being embedded in dug in advance in the monitor well of establishing; At each described monitoring well head modular converter is set, and some modular converters are joined by CAN bus and data acquisition module input end; In each described protection tube, lay the waterproof bus that is parallel with some 1-wire digital temperature sensors, and described waterproof bus upper end is connected with described modular converter; Described 1-wire digital temperature sensor collecting temperature information also is sent to described data acquisition module by the waterproof bus.
Described liquid couplant is a water.
Described protection tube is steel pipe or PE pipe.
This method also has following steps: after described data acquisition module is handled described 1-wire digital temperature sensor Information Monitoring, be sent to data reception module in the server by the wireless transmission assembly.
Communication between described wireless transmission assembly and the data reception module connects based on GPRS or CDMA.
Described data acquisition module is coupled with the import and export house steward's who is located at described earth-source hot-pump system flowmeter and temperature sensor.
The partial lateral sealed packet that described 1-wire digital temperature sensor and the payment to a porter that is connected with described bus thereof, described bus and described payment to a porter are joined is wrapped with first encapsulated layer, described first encapsulated layer outside is provided with second encapsulated layer that joins with its sealing, and described bus is passed through described second encapsulated layer from the extended two ends of described first encapsulated layer and stretched out.
Described 1-wire digital temperature sensor is located at the proximal edge portion in described first encapsulated layer.
The heat exchange hole of described earth-source hot-pump system becomes grid, at least one monitor well in described some monitor wells is arranged in the center in one group of adjacent heat exchange hole, described heat exchange hole, and at least one monitor well in described some monitor wells is positioned at the edge of described heat exchange bore region.
Advantage of the present invention is: bus type is arranged the cost performance height, has reduced the monitoring system construction cost, and construction is convenient; Double-deck waterproof technology waterproof effect is better, has realized that digital sensor can move more than the withstand voltage 3MPa of reaching under waterproof resistance to compression technology for a long time; Modular converter has been adopted in each hole, and networking is simple and easy, and novel monitor well has realized that the later stage can carry out the Installation and Debugging of temp measuring system, and it is simple and convenient to construct, and makes the sensor survival rate reach 100%; The sensor later stage can safeguard and calibrate; Use the GPRS technology to realize that remote monitoring has reduced the management maintenance cost in later stage, carries out false alarm with data simultaneously.
Description of drawings
Accompanying drawing 1 is the one-piece construction synoptic diagram of present embodiment;
Accompanying drawing 2 is the electric elements syndeton synoptic diagram of present embodiment;
But accompanying drawing 3 is a maintenance type monitor well structural representation in the present embodiment;
Accompanying drawing 4 is an arrangement of temperature sensor synoptic diagram in the present embodiment;
Accompanying drawing 5 is monitor well and an earth source heat pump heat exchange hole relative position synoptic diagram in the present embodiment.
Embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Shown in Fig. 1-5, mark 1-13 is not among the figure: connect lead 1, lead-in wire 2, temperature sensor 3, first encapsulated layer 4, second encapsulated layer 5, data acquisition module 6, server 7, protection tube 8, backfill 9, couplant 10, modular converter 11, monitor well 12, heat exchange hole 13.
The present invention mainly addresses the problem according to the problem of traditional system and the existence of construction maintenance aspect:
(1) but research and development bus type networking digital ground temperature Application of Monitoring System to the underground temperature field monitoring, make monitoring holes realize that the back lays maintenance type monitoring holes structure but construction technology and hole structure improved.
(2) solve the waterproof problem of digital deep water sensor under big pressure.
(3) monitoring system is realizing the bus type laying, and a cable can connect a plurality of temperature probes, reduces the monitoring cost.
(4) use modular converter that the temperature probe of each monitor well is coupled together, realize networking, reduce cost simultaneously.
(5) after construction finishes, carry out the monitoring system Installation and Debugging, make things convenient for monitoring system and earth source heat pump engineering construction, guarantee to bury sensor survival rate 100% underground, the sensor of underground laying of later stage can be safeguarded and calibrate.
(6) use the monitor server main frame that the image data remote monitoring is carried out at the scene.
(7) not only will monitor underground temperature field, also source out temperature and flow are monitored over the ground.
In conjunction with the foregoing invention thinking, below be elaborated for structure in the present embodiment and corresponding construction method:
Shown in Fig. 1-3; monitor well 12 treat boring finish after with after the protection tube water filling at the bottom of the hole; treat to carry out the Installation and Debugging of ground temperature monitoring system after on-the-spot earth-source hot-pump system engineering construction finishes; adopt double-deck waterproof technology to encapsulate temperature sensor 3; use bus to connect waterproof encapsulation temperature sensor 3; require temperature sensor 3 is arranged in the monitoring holes according to each stratum temperature monitoring; modular converter 11 is arranged in each aperture; connect each aperture modular converter 11 by the CAN bussing technique; bus is directly gathered main frame in SLET1000-3 field monitoring system for field and is linked to each other; import and export layout flowmeter and temperature sensor on the house steward at earth-source hot-pump system; the SLET1000-3 system is responsible for field temperature and flow data collector; data send to the server or the data acquisition center of Surveillance center by GPRS after handling, thereby realize the in real time concentrated on-line monitoring of field data.In SLES2009 on-line monitoring system software, alarming value is set, when signal interruption and other reasons cause data normally to be sent to data center, adopts and manually carry out data transmission, data are delivered to control data corporation to the scene; Carry out the data initial analysis at control data corporation, sum up rule, analyze reason, check, analyze reason and in time temperature measuring equipment is carried out self check, timely place under repair and replacing if instrument and equipment breaks down if the data that note abnormalities are carried out whole monitoring system.
The ground temperature monitoring system is made up of SLES2009 on-line monitoring system software that is installed in Surveillance center and the on-the-spot temp measuring system of SLET1000-3 that is distributed in everywhere.Field monitoring center and the communication that is dispersed in SLET1000-3 system everywhere are based on that GPRS network carries out.
Referring to Fig. 5, Fig. 5 is monitor well 12 and earth source heat pump heat exchange hole 13 relative position synoptic diagram.13 one-tenth grid in heat exchange hole in the earth-source hot-pump system wherein, among Fig. 5 in the monitor well 12 quantity be 3, wherein a monitor well 12 is positioned at center (the i.e. one group of grid cell in one group of adjacent heat exchange hole 13 herein in one group of adjacent heat exchange hole 13, form by 4 adjacent in length and breadth heat exchange wells, wherein there are and have only two adjacent heat exchange holes 13 in one group of adjacent heat exchange hole 13 on co-ordination), and there are two monitor wells 13 to be positioned at the edge of described heat exchange bore region, and arrange along trend away from the heat exchange bore region.
Referring to Fig. 4, temperature sensor mainly comprises bus 1, the lead 2 that is connected with described bus 1, the temperature-sensing element 3 of being located at lead 2 ends in the present embodiment.What wherein temperature-sensing element 3 adopted is 1-wire digital temperature sensor (claiming a line device again), and concrete model is DS18B20, and this sensor temperature measurement accuracy and resolution are higher, and the resolution that can realize programming is 0.1625 ℃.And 1-wire digital temperature sensor has the multiple spot networking function, and promptly a plurality of DS18B20 can be connected in parallel on the bus 1, can realize multi-point temperature measurement.Bus 1 has three lines, respectively the pin of corresponding DS18B20: GND (voltage ground), DQ(forms data bus), the VDD(supply voltage).2 each pins that are connected to temperature-sensing element 3 respectively from bus 1 go between.
For realizing the water-tight of temperature sensor, temperature sensor also has the described lead-in wire 2 of one deck sealed envelope, temperature-sensing element 3 and connects lead 1 and first encapsulated layer 4 of lead-in wire 2 parts that join, described first encapsulation 4 outsides are provided with second encapsulated layer 5 that joins with its sealing, and described connection lead 1 passes through described second encapsulated layer 5 from described first encapsulated layer 4 extended two ends and stretches out.Wherein, first encapsulated layer 4, second encapsulated layer, 5 materials all adopt epoxy resin, and first encapsulated layer 4 is with the junction waterproof between bus 1, payment to a porter 2 and the temperature-sensing element 3; Second encapsulated layer 5 is to be used for bus 1 waterproof outer,, two-layer encapsulation guarantees the waterproof of sensor and transmission line.
Though below describe in detail with reference to the design and the embodiment of accompanying drawing to the object of the invention, but those of ordinary skills can recognize, under the precondition that does not break away from the claim limited range, still can make various improvement and conversion to the present invention, as: the Material Selection of mentioning among the embodiment for first encapsulated layer 4, second encapsulated layer 5, also can adopt other good heat conductivity and have the material of low conductivity, as the heat-conducting resin material, the heat conductive silica gel material, special heat-conductive coating, stupaliths etc. are not being given unnecessary details at this.
Claims (9)
1. underground temperature field monitoring method that is used for earth-source hot-pump system, this method passes through to measure the temperature of some monitor wells to realize the monitoring of underground temperature field, it is characterized in that having following steps: liquid couplant will be injected in the protection tube of lower end closed, and corresponding one by one being embedded in dug in advance in the monitor well of establishing; At each described monitoring well head modular converter is set, and some modular converters are joined by CAN bus and data acquisition module input end; In each described protection tube, lay the waterproof bus that is parallel with some 1-wire digital temperature sensors, and described waterproof bus upper end is connected with described modular converter; Described 1-wire digital temperature sensor collecting temperature information also is sent to described data acquisition module by the waterproof bus.
2. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 1, it is characterized in that: described liquid couplant is a water.
3. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 1 is characterized in that: described protection tube is steel pipe or PE pipe.
4. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 1, it is characterized in that this method also has following steps: after described data acquisition module is handled described 1-wire digital temperature sensor Information Monitoring, be sent to data reception module in the server by the wireless transmission assembly.
5. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 4 is characterized in that: the communication between described wireless transmission assembly and the data reception module connects based on GPRS or CDMA.
6. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 1, it is characterized in that: described data acquisition module is coupled with the import and export house steward's who is located at described earth-source hot-pump system flowmeter and temperature sensor.
7. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 1, it is characterized in that: the partial lateral sealed packet that described 1-wire digital temperature sensor and the payment to a porter that is connected with described bus thereof, described bus and described payment to a porter are joined is wrapped with first encapsulated layer, described first encapsulated layer outside is provided with second encapsulated layer that joins with its sealing, and described bus is passed through described second encapsulated layer from the extended two ends of described first encapsulated layer and stretched out.
8. a kind of underground temperature field monitoring method that is used for earth-source hot-pump system according to claim 7 is characterized in that: described 1-wire digital temperature sensor is located at the proximal edge portion in described first encapsulated layer.
9. a kind of underground temperature field monitoring system that is used for earth-source hot-pump system according to claim 1, it is characterized in that: the heat exchange hole of described earth-source hot-pump system becomes grid, at least one monitor well in described some monitor wells is arranged in the center in one group of adjacent heat exchange hole, described heat exchange hole, and at least one monitor well in described some monitor wells is positioned at the edge of described heat exchange bore region.
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| CN201110123213XA CN102288317A (en) | 2011-05-13 | 2011-05-13 | Underground temperature field monitoring method for ground source heat pump system |
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| CN201110123213XA CN102288317A (en) | 2011-05-13 | 2011-05-13 | Underground temperature field monitoring method for ground source heat pump system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103867189A (en) * | 2014-02-26 | 2014-06-18 | 长江勘测规划设计研究有限责任公司 | Distributed type well-temperature measuring device and measuring method |
| CN116698204A (en) * | 2023-05-04 | 2023-09-05 | 中国科学院武汉岩土力学研究所 | High-precision surrounding rock temperature monitoring system and monitoring method suitable for low-temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867189A (en) * | 2014-02-26 | 2014-06-18 | 长江勘测规划设计研究有限责任公司 | Distributed type well-temperature measuring device and measuring method |
| CN116698204A (en) * | 2023-05-04 | 2023-09-05 | 中国科学院武汉岩土力学研究所 | High-precision surrounding rock temperature monitoring system and monitoring method suitable for low-temperature environment |
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