CN107860154A - The extensive vertical ground heat exchanger subregion framework and its operation reserve of earth-source hot-pump system - Google Patents
The extensive vertical ground heat exchanger subregion framework and its operation reserve of earth-source hot-pump system Download PDFInfo
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- CN107860154A CN107860154A CN201711305759.0A CN201711305759A CN107860154A CN 107860154 A CN107860154 A CN 107860154A CN 201711305759 A CN201711305759 A CN 201711305759A CN 107860154 A CN107860154 A CN 107860154A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000005192 partition Methods 0.000 claims abstract description 36
- 230000008520 organization Effects 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims description 43
- 238000001816 cooling Methods 0.000 claims description 27
- 238000013316 zoning Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000000704 physical effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000638 solvent extraction Methods 0.000 description 17
- 238000012544 monitoring process Methods 0.000 description 15
- 238000005553 drilling Methods 0.000 description 12
- 239000003532 endogenous pyrogen Substances 0.000 description 11
- 108010052620 leukocyte endogenous mediator Proteins 0.000 description 11
- 238000011160 research Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000007704 transition Effects 0.000 description 6
- 208000034657 Convalescence Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
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- 238000010835 comparative analysis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013486 operation strategy Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000005439 thermosphere Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Other Air-Conditioning Systems (AREA)
Abstract
The present invention relates to the extensive vertical ground heat exchanger subregion framework and its operation reserve of a kind of earth-source hot-pump system, some groups of vertical underground pipe partition set-up structures are inside and outside partitioned organization, vertical underground pipe is connected with water knockout drum and water collector respectively by pipeline, water knockout drum and water collector are connected with earth source heat pump unit, motor-operated control valve and temperature transmitter and calorimeter are installed on the branch pipe that water knockout drum and water collector are connected with vertical underground pipe, the control terminal of temperature transmitter and calorimeter and motor-operated control valve is connected, and motor-operated control valve is connected with master controller.Operation reserve takes exterior lateral area preferentially to run, then gradually operation is opened in ecto-entad region district by district successively；The operation reserve closed district by district using region from inside to outside when out of service.Beneficial effect：The present invention is by preferentially running the pipe laying close to outside, and close outside pipe laying run time is longer, can distribute effectively the cold and hot amount in pipe laying region, ensure the thermal balance in vertical underground pipe region.
Description
Technical field
The invention belongs to the extensive vertically imbedded pipe heat-exchanging of earth-source hot-pump system, more particularly to a kind of earth-source hot-pump system
Device subregion framework and its operation reserve.
Background technology
Earth-source hot-pump system has green and efficient two major features, is widely used in China.But in Di Yuan
The cold and hot amount accumulation of soil and hot unbalance are especially prominent during the use of heat pump, have had a strong impact on system operation energy
Effect, the soil moisture often rise 1 DEG C, cause energy consumption to increase 3%-4% when taking identical cold.Substantial amounts of exploitation and long-term use are even
Influence underground ecological environment.It is to ensure that ground source heat pump technology runs urgent need solution long-term effectively to seek rationally effective solution
Certainly the problem of.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned technology, and provide a kind of the extensive vertical of earth-source hot-pump system
Ground heat exchanger subregion framework and its operation reserve, it can be alleviated by extensive vertical underground pipe subregion and its operation reserve
The problem of cold and hot amount accumulation of vertical underground pipe region and the earth-source hot-pump system efficiency thereby resulted in reduce.
The present invention to achieve the above object, using following technical scheme：A kind of earth-source hot-pump system it is extensive vertically
Buried tube heat exchanger subregion framework, including some groups of vertical underground pipes, it is characterized in that：Some groups of vertical underground pipes are set in subregion
Structure is put, the partition set-up structure is followed successively by the interior of the first subregion, the second subregion, the 3rd subregion and the 4th subregion from inside to outside
China and foreign countries' partitioned organization, the vertical underground pipe of partition set-up structure are connected with water knockout drum and water collector respectively by pipeline, described point
Hydrophone and water collector are connected by house steward with earth source heat pump unit, on the branch pipe that water knockout drum and water collector are connected with vertical underground pipe
Motor-operated control valve and temperature transmitter and calorimeter are installed, temperature transmitter and the control terminal of calorimeter and motor-operated control valve connect
Connect, motor-operated control valve connects and composes the zonal control loop of vertical underground pipe with master controller.
The partition set-up structure is block partitioned organization, and cartesian coordinate system is regarded in whole pipe laying region as, and origin is to bury
Pipe regional center, the first subregion of vertical underground pipe are located at fourth quadrant, and the second subregion is located at the second quadrant, and the 3rd subregion is located at
First quartile, the 4th subregion are located at third quadrant.
The partition set-up structure is space partition structure, vertical underground pipe at zoning, by topmost near
The vertical underground pipe of three rows of pipe laying areas outside is divided into the first subregion, and bottom is vertical near three rows of pipe laying areas outside
Underground pipe is divided into the second subregion, the vertical underground pipe of the row of penetralia two is divided into the 4th subregion, by remaining two row vertically
Pipe laying is divided into the 3rd subregion.
The vertical underground pipe quantity of each subregion of partition set-up structure accounts for the ratio of whole vertical underground pipe quantity with being somebody's turn to do
The rate of load condensate that subregion is undertaken is identical；
The vertical underground pipe number calculation formula of each subregion of partition set-up structure is：
N=a*N
In formula：N-vertical underground pipe a total of tubes
The rate of load condensate that a-subregion pipe laying is undertaken.
The operation reserve of the vertical ground heat exchanger subregion framework, it is determined that the knot that vertical underground pipe regional compartmentalization is set
After the hot physical property of structure boundary condition and soil, it is preferential to open the exterior lateral area for taking run time longer compared with other regions during operation
Operation, then gradually ecto-entad region is run district by district successively；The operation closed district by district using region from inside to outside when out of service
Strategy, make full use of limited border to transmit heat, comprise the following steps that：Run first when cooling or heat supply season just start
One subregion, as load increases, increase successively runs the second subregion, the 3rd subregion and the 4th subregion；When load is reduced, the 4th
Subregion is out of service first, and then the 3rd subregion out of service, the second subregion, the first subregion are finally out of service successively.
Beneficial effect：Compared with prior art, the present invention is by preferentially running the pipe laying close to outside, and close outside
Pipe laying run time is longer, can distribute effectively the cold and hot amount in pipe laying region, ensures the heat in vertical underground pipe region
Balance.The temperature conditions for each loop tested according to temperature transmitter, summer exceed highest setting when the temperature of certain loop
During temperature (heat supply season is less than lowest set temperature), the electric control valve of the subregion loop is closed by master controller, that is, is extended
The convalescence of this region pipe laying, when less than lowest set temperature (heat supply season is higher than highest setting temperature), opened by master controller
The electric control valve of the subregion loop is opened, such cycle criterion control makes whole vertical underground pipe regional temperature inhomogeneities drop
It is low.The hot stack of vertical underground pipe region can effectively be alleviated, improve thermal balance and stability, ensure that earth-source hot-pump system is steady
Determine Effec-tive Function.With the change of load and ground temperature, the vertical underground pipe operation area of adjust automatically, cold and hot amount is set to be easier to expand
Dissipate, make each region intermittent duty, be advantageous to the recovery of ground temperature, so as to alleviate or eliminate the cold and hot packing phenomenon of pipe laying regional soil,
Maintain the heat endurance of soil so that earth-source hot-pump system Effec-tive Function.
Brief description of the drawings
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the signaling diagram of the present invention；
Fig. 3 is the inside and outside partitioned organization figure of vertical underground pipe of the present invention；
Fig. 4 is the vertical underground pipe bulk partitioned organization figure of the present invention；
Fig. 5 is the vertical underground pipe space partition structure chart of the present invention；
Fig. 6 is that the not subregion of the present invention and inside and outside partitioning strategies perpendicularly buried pipe region Nei Ge monitoring points set schematic diagram；
The block partitioning strategies perpendicularly buried pipe region Nei Ge monitoring points that Fig. 7 is the present invention set schematic diagram；
The interval strategy perpendicularly buried pipe region Nei Ge monitoring points that Fig. 8 is the present invention set schematic diagram.
In figure, the vertical underground pipes of 1-, 2- water collectors, 3- water knockout drums, 4- water circulating pumps, 5- earth source heat pump units, 6- is electronic
Control valve, 7- temperature transmitters, 8- calorimeters, 9- master controllers；
The subregions of A- first, the subregions of B- second, the subregions of C- the 3rd, the subregions of D- the 4th.
Embodiment
Describe the embodiment of the present invention in detail with reference to specific embodiment.
Refer to accompanying drawing, a kind of extensive vertically ground heat exchanger subregion framework, including some groups of earth-source hot-pump system
Vertical underground pipe, it is characterized in that：Some groups of vertical underground pipes are in partition set-up structure, and the partition set-up structure is by introversion
The outer inside and outside partitioned organization for being followed successively by the first subregion, the second subregion, the 3rd subregion and the 4th subregion, partition set-up structure hang down
Straight underground pipe is connected with water knockout drum and water collector respectively by pipeline, and the water knockout drum and water collector pass through house steward and earth source heat pump
Unit connects, be provided with the branch pipe that water knockout drum and water collector are connected with vertical underground pipe motor-operated control valve and temperature transmitter and
The control terminal of calorimeter, temperature transmitter and calorimeter and motor-operated control valve connects, and motor-operated control valve is connected structure with master controller
Into the zonal control loop of vertical underground pipe.The temperature conditions for each loop tested according to temperature transmitter, summer work as certain ring
When the temperature on road exceedes highest setting temperature (heat supply season is less than lowest set temperature), the subregion loop is closed by master controller
Electric control valve, that is, extend the convalescence of this region pipe laying, when (heat supply season is higher than highest setting temperature less than lowest set temperature
Degree) when, the electric control valve of the subregion loop, such cycle criterion control are opened by master controller.On each subregion loop
Electric control valve switched by main controller controls, reality temperature when being gathered by temperature transmitter, calorimeter collection heat flow number
According to master controller judges the handling situations of each subregion loop according to the temperature of collection, and whole control is automatically complete by master controller
Into.
The partition set-up structure is block partitioned organization, and cartesian coordinate system is regarded in whole pipe laying region as, and origin is to bury
Pipe regional center, the first subregion of vertical underground pipe are located at fourth quadrant, and the second subregion is located at the second quadrant, and the 3rd subregion is located at
First quartile, the 4th subregion are located at third quadrant.
The partition set-up structure is space partition structure, vertical underground pipe at zoning, by topmost near
The vertical underground pipe of three rows of pipe laying areas outside is divided into the first subregion, and bottom is vertical near three rows of pipe laying areas outside
Underground pipe is divided into the second subregion, the vertical underground pipe of the row of penetralia two is divided into the 4th subregion, by remaining two row vertically
Pipe laying is divided into the 3rd subregion.
The vertical underground pipe quantity of each subregion of partition set-up structure accounts for the ratio of whole vertical underground pipe quantity with being somebody's turn to do
The rate of load condensate that subregion is undertaken is identical；
The vertical underground pipe number calculation formula of each subregion of partition set-up structure is：
N=a*N
In formula：N-vertical underground pipe a total of tubes
The rate of load condensate that a-subregion pipe laying is undertaken.
It is 100 for this specific embodiment N, the inside and outside subregion of partitioned organization first is undertaken to the 4th each subregion of subregion
Rate of load condensate is respectively 36%, 28%, 20%, 16%, and corresponding first subregion to the underground pipe quantity of the 4th subregion is respectively 36
Mouthful, 28 mouthfuls, 20 mouthfuls, 16 mouthfuls；The rate of load condensate that the block subregion of partitioned organization first is undertaken to the 4th each subregion of subregion is respectively
25%th, 25%, 25%, 25%, the underground pipe quantity of corresponding first subregion to the 4th subregion is respectively 25 mouthfuls, 25 mouthfuls, 25 mouthfuls,
25 mouthfuls；The rate of load condensate that the subregion of space partition structure first is undertaken to the 4th each subregion of subregion is respectively 30%, 30%,
20%th, 20%, the underground pipe quantity of corresponding first subregion to the 4th subregion is respectively 30 mouthfuls, 30 mouthfuls, 20 mouthfuls, 20 mouthfuls.
The operation reserve of the vertical ground heat exchanger subregion framework, it is determined that the knot that vertical underground pipe regional compartmentalization is set
After the hot physical property of structure boundary condition and soil, it is preferential to open the exterior lateral area for taking run time longer compared with other regions during operation
Operation, then gradually ecto-entad region is run district by district successively；The operation closed district by district using region from inside to outside when out of service
Strategy, make full use of limited border to transmit heat, comprise the following steps that：Run first when cooling or heat supply season just start
One subregion, as load increases, increase successively runs the second subregion, the 3rd subregion and the 4th subregion；When load is reduced, the 4th
Subregion is out of service first, and then the 3rd subregion out of service, the second subregion, the first subregion are finally out of service successively.
Embodiment 1
1st, inside and outside partitioned organization
This example determines different subregions vertically imbedded pipe heat-exchanging according to the number of days that different load rate accounts in a cooling season
The length of device run time.When cooling season just starts, required load is often smaller, and load is in 36% section, only runs
One subregion buried tube heat exchanger；With the extension of time, load needed for building also gradually increases, load is in 64% section, this
When need to increase vertical underground pipe operation quantity, open the vertical underground pipe of the second subregion, the vertical underground pipe of the first subregion continues to transport
OK；When load rises to 84% section, the vertical underground pipe of increase the 3rd subregion of operation, the second subregion and the vertical underground pipe of the first subregion
Heat exchanger continues to run with；When load reaches Design cooling load needed for building, i.e., rate of load condensate reaches 100%, and the 4th subregion is vertical
Ground heat exchanger is opened, and now the heat exchanger in whole pipe laying region is all in running status.When building load reduces, loading zone
Between from 100% gradually drop to 36%, each subregion leaving water temperature reduces successively, and vertical ground heat exchanger reversely reduces fortune successively
OK, it is out of service in transition season earth-source hot-pump system, vertical underground pipe soil region ground temperature Restoration stage.
As shown in Figure 3 one is in 100 mouthfuls of vertical underground pipes (deep 120 meters) of symmetric arrays, according to proposed by the present invention
Method sets the first 36 mouthfuls of subregion pipe laying quantity, the second 28 mouthfuls of subregion, the 3rd 20 mouthfuls of subregion, the 4th 16 mouthfuls of subregion.
This example includes vertical underground pipe 1, water collector 2, water knockout drum 3, water circulating pump 4, earth source heat pump unit 5, electronic control
Valve 6, temperature transmitter 7 and calorimeter 8 and master controller 9 processed.Wherein whole vertical underground pipe region is divided into the first subregion A, the
Tetra- two subregion B, the 3rd subregion C and the 4th subregion D regions, the pipe laying quantity in each region are held according to the subregion pipe laying
What the rate of load condensate of load determined.Pipe laying on the outside of whole region is divided into the 4th subregion by vertical underground pipe 1 at zoning, will
The inside pipe laying adjacent with vertical the first subregion of underground pipe A is divided into the second subregion B, the inside pipe laying adjacent with the second subregion B
Divide the 3rd subregion C into, the remaining all pipe layings in inner side of vertical underground pipe 1 are divided into the 4th subregion D.Four regions it is vertical buried
Pipe is connected with water collector 2 respectively by pipeline, and water collector is connected by house steward with earth source heat pump unit 5, water knockout drum and water collector
Motor-operated control valve 6 and temperature transmitter 7 and calorimeter 8 are installed, each temperature becomes on the branch pipe being connected with vertical underground pipe
Device and the control terminal of calorimeter signal and motor-operated control valve is sent to be connected with master controller 9, according to temperature transmitter and calorimeter
Signal intensity send instruction to motor-operated control valve from master controller and realize the zonal control of vertical underground pipe.
Its control mode is：
The first subregion is run first when cooling (heat supply) season just starts, with load increase and the rise of leaving water temperature
(reduction of heat supply season), successively increase run the second subregion, the 3rd subregion and the 4th subregion；Dropped when load is reduced with leaving water temperature
Low (rise of heat supply season), the 4th subregion is out of service first, then the 3rd subregion out of service, the second subregion successively, first point
Area is finally out of service.
The master controller can be in borrow system master controller, vertical underground pipe is divided into multiple subregion loops,
Each subregion loop be connected in parallel to connection earth source heat pump computer room point, on water collector, the water knockout drum and water collector of each subregion are with hanging down
Motor-operated control valve and temperature transmitter and calorimeter are installed on the branch pipe of straight underground pipe connection.The temperature and heat flow information of collection
Send to master controller.When cooling or heat supply season just start, master controller first opens the electricity on the first subregion loop
Dynamic control valve, the motor-operated control valve closed on other three subregion loops, with the increase of load, open be located at second point successively
Motor-operated control valve on area's loop, the motor-operated control valve on the 3rd subregion loop are electronic on the 4th subregion loop
Control valve, it is now cooling or load maximum period in heat supply season when all motor-operated control valves are all opened；With subtracting for load
It is few, the motor-operated control valve on the 4th subregion loop is progressively closed off, the motor-operated control valve on the 3rd subregion loop, is located at
Motor-operated control valve on second subregion loop, the motor-operated control valve on the first subregion loop, when all valves are all closed,
Now cooling or heat supply season terminate, such cycle criterion control.The temperature for each loop tested simultaneously according to temperature transmitter
Situation, summer when the temperature of certain loop exceedes highest setting temperature (heat supply season is less than lowest set temperature), by master controller
The electric control valve of the subregion loop is closed, that is, extends the convalescence of this region pipe laying, when less than lowest set temperature (heat supply
Season is higher than highest setting temperature) when, the electric control valve of the subregion loop, such cycle criterion control are opened by master controller
System.It so control, can not only ensure the thermal balance and stability in vertical underground pipe region, source pump can also be made stable
Effec-tive Function.
Electric control valve on each subregion loop is switched by main controller controls, real temperature when being gathered by temperature transmitter
Degree, calorimeter collection heat flow data, master controller judge the working condition of each subregion loop according to the temperature of collection, entirely
Control is automatically performed by master controller, and without manual intervention, manipulation is convenient, while improves the safety of vertical underground pipe system
Property.
Embodiment 2
Block partitioned organization
The present embodiment determines that the vertical underground pipe of different subregions changes according to the number of days that different load rate accounts in a cooling season
The length of hot device run time.When cooling season just starts, required load is often smaller, and load is in 25% section, only runs
First subregion buried tube heat exchanger；With the extension of time, load needed for building also gradually increases, load is in 50% section,
Now need to increase vertical underground pipe operation quantity, open the vertical underground pipe of the second subregion, the vertical underground pipe of the first subregion continues
Operation；When load rises to 75% section, the vertical underground pipe of increase the 3rd subregion of operation, the second subregion and the first subregion are vertically buried
Heat exchange of heat pipe continues to run with；When load reaches Design cooling load needed for building, i.e., rate of load condensate reaches 100%, and the 4th subregion hangs down
Straight ground heat exchanger is opened, and now the heat exchanger in whole pipe laying region is all in running status.When building load reduces, load
Section gradually drops to 25% from 100%, and each subregion leaving water temperature reduces successively, and vertical ground heat exchanger reversely reduces fortune successively
OK, it is out of service in transition season earth-source hot-pump system, vertical underground pipe soil region ground temperature Restoration stage.
As shown in Figure 4 one is in 100 mouthfuls of vertical underground pipes (deep 120 meters) of symmetric arrays, according to proposed by the present invention
Method sets the first 25 mouthfuls of subregion pipe laying quantity, the second 25 mouthfuls of subregion, the 3rd 25 mouthfuls of subregion, the 4th 25 mouthfuls of subregion.
This example includes vertical underground pipe 1, water collector 2, water knockout drum 3, water circulating pump 4, earth source heat pump unit 5, electronic control
Valve 6, temperature transmitter 7 and calorimeter 8 and master controller 9 processed.Wherein whole vertical underground pipe region is divided into the first subregion A, the
Tetra- two subregion B, the 3rd subregion C and the 4th subregion D regions, the pipe laying quantity in each region are held according to the subregion pipe laying
What the rate of load condensate of load determined.Vertical underground pipe regards whole pipe laying region as cartesian coordinate system, origin is at zoning
Pipe laying regional center, then the first subregion be located at fourth quadrant, the second subregion is located at the second quadrant, the 3rd subregion positioned at first as
Limit, the 4th subregion are located at third quadrant.The vertical underground pipe in four regions is connected with water collector 2 respectively by pipeline, water collector
It is connected by house steward with earth source heat pump unit 5, divides, motor-operated control valve 6 is installed on the branch pipe that water collector is connected with vertical underground pipe
With temperature transmitter 7 and calorimeter 8, each temperature transmitter and the control terminal of calorimeter signal and motor-operated control valve with
Master controller 9 connects, and is sent and instructed from master controller to motor-operated control valve according to the signal intensity of temperature transmitter and calorimeter
Realize the zonal control of vertical underground pipe.
Its control mode is：
The first subregion is run first when cooling (heat supply) season just starts, with load increase and the rise of leaving water temperature
(reduction of heat supply season), successively increase run the second subregion, the 3rd subregion and the 4th subregion；Dropped when load is reduced with leaving water temperature
Low (rise of heat supply season), the 4th subregion is out of service first, then the 3rd subregion out of service, the second subregion successively, first point
Area is finally out of service.
The master controller can be in borrow system master controller, vertical underground pipe is divided into multiple subregion loops,
Each subregion loop is connected in parallel on the water knockout drum and water collector of connection earth source heat pump computer room, the water knockout drum and water collector of each subregion
Motor-operated control valve and temperature transmitter and calorimeter are installed on the branch pipe being connected with vertical underground pipe.The temperature and heat flow of collection
Information is sent to master controller.When cooling or heat supply season just start, master controller is first opened on the first subregion loop
Motor-operated control valve, the motor-operated control valve closed on other three subregion loops, with the increase of load, open successively positioned at the
Motor-operated control valve on two subregion loops, the motor-operated control valve on the 3rd subregion loop, on the 4th subregion loop
Motor-operated control valve, it is now cooling or load maximum period in heat supply season when all motor-operated control valves are all opened；With load
Reduction, progressively close off the motor-operated control valve on the 4th subregion loop, the motor-operated control valve on the 3rd subregion loop,
Motor-operated control valve on the second subregion loop, the motor-operated control valve on the first subregion loop, when all valves all close
When closing, now terminate in cooling or heat supply season, such cycle criterion control.The each loop tested simultaneously according to temperature transmitter
Temperature conditions, summer when the temperature of certain loop exceedes highest setting temperature (heat supply season is less than lowest set temperature), by master control
Device processed closes the electric control valve of the subregion loop, that is, extends the convalescence of this region pipe laying, when less than lowest set temperature
When (heat supply season is higher than highest setting temperature), the electric control valve of the subregion loop is opened by master controller, so circulation is sentenced
Disconnected control.So control, can not only ensure the thermal balance and stability in vertical underground pipe region, can also make source pump
Stable and high effective operation.
Electric control valve on each subregion loop is switched by main controller controls, real temperature when being gathered by temperature transmitter
Degree, calorimeter collection heat flow data, master controller judge the working condition of each subregion loop according to the temperature of collection, entirely
Control is automatically performed by master controller, and without manual intervention, manipulation is convenient, while improves the safety of vertical underground pipe system
Property.
Embodiment 3
Space partition structure
This example determines different subregions vertically imbedded pipe heat-exchanging according to the number of days that different load rate accounts in a cooling season
The length of device run time.When cooling season just starts, required load is often smaller, and load is in 30% section, only runs
One subregion buried tube heat exchanger；With the extension of time, load needed for building also gradually increases, load is in 60% section, this
When need to increase vertical underground pipe operation quantity, open the vertical underground pipe of the second subregion, the vertical underground pipe of the first subregion continues to transport
OK；When load rises to 80% section, the vertical underground pipe of increase the 3rd subregion of operation, the second subregion and the vertical underground pipe of the first subregion
Heat exchanger continues to run with；When load reaches Design cooling load needed for building, i.e., rate of load condensate reaches 100%, and the 4th subregion is vertical
Ground heat exchanger is opened, and now the heat exchanger in whole pipe laying region is all in running status.When building load reduces, loading zone
Between from 100% gradually drop to 30%, each subregion leaving water temperature reduces successively, and vertical ground heat exchanger reversely reduces fortune successively
OK, it is out of service in transition season earth-source hot-pump system, vertical underground pipe soil region ground temperature Restoration stage.
As shown in Figure 5 one is in 100 mouthfuls of vertical underground pipes (deep 120 meters) of symmetric arrays, according to proposed by the present invention
Method sets the first 30 mouthfuls of subregion pipe laying quantity, the second 30 mouthfuls of subregion, the 3rd 20 mouthfuls of subregion, the 4th 20 mouthfuls of subregion.
This example includes vertical underground pipe 1, water collector 2, water knockout drum 3, water circulating pump 4, earth source heat pump unit 5, electronic control
Valve 6, temperature transmitter 7 and calorimeter 8 and master controller 9 processed.Wherein whole vertical underground pipe region is divided into the first subregion A, the
Tetra- two subregion B, the 3rd subregion C and the 4th subregion D regions, the pipe laying quantity in each region are held according to the subregion pipe laying
What the rate of load condensate of load determined.Vertical underground pipe exchanges heat three rows of the topmost near pipe laying areas outside at zoning
Device is divided into the first subregion, three row heat exchangers of the bottom near pipe laying areas outside is divided into the second subregion, by penetralia
Two row's heat exchangers are divided into the 4th subregion, and remaining two rows heat exchanger is divided into the 3rd subregion.
The vertical underground pipe in four regions is connected with water collector 2 respectively by pipeline, and water collector passes through house steward and ground source heat
Pump assembly 5 is connected, and divides, motor-operated control valve 6 and temperature transmitter 7 and heat are installed on the branch pipe that water collector is connected with vertical underground pipe
Scale 8, each temperature transmitter and the control terminal of calorimeter signal and motor-operated control valve are connected with master controller 9, root
Instruction is sent from master controller to motor-operated control valve realize vertical underground pipe according to the signal intensity of temperature transmitter and calorimeter
Zonal control.
Its control mode is：
The first subregion is run first when cooling (heat supply) season just starts, with load increase and the rise of leaving water temperature
(reduction of heat supply season), successively increase run the second subregion, the 3rd subregion and the 4th subregion；Dropped when load is reduced with leaving water temperature
Low (rise of heat supply season), the 4th subregion is out of service first, then the 3rd subregion out of service, the second subregion successively, first point
Area is finally out of service.
The master controller can be in borrow system master controller, vertical underground pipe is divided into multiple subregion loops,
Each subregion loop be connected in parallel to connection earth source heat pump computer room point, on water collector, the water knockout drum and water collector of each subregion are with hanging down
Motor-operated control valve and temperature transmitter and calorimeter are installed on the branch pipe of straight underground pipe connection.The temperature and heat flow information of collection
Send to master controller.When cooling or heat supply season just start, master controller first opens the electricity on the first subregion loop
Dynamic control valve, the motor-operated control valve closed on other three subregion loops, with the increase of load, open be located at second point successively
Motor-operated control valve on area's loop, the motor-operated control valve on the 3rd subregion loop are electronic on the 4th subregion loop
Control valve, it is now cooling or load maximum period in heat supply season when all motor-operated control valves are all opened；With subtracting for load
It is few, the motor-operated control valve on the 4th subregion loop is progressively closed off, the motor-operated control valve on the 3rd subregion loop, is located at
Motor-operated control valve on second subregion loop, the motor-operated control valve on the first subregion loop, when all valves are all closed,
Now cooling or heat supply season terminate, such cycle criterion control.The temperature for each loop tested simultaneously according to temperature transmitter
Situation, summer when the temperature of certain loop exceedes highest setting temperature (heat supply season is less than lowest set temperature), by master controller
The electric control valve of the subregion loop is closed, that is, extends the convalescence of this region pipe laying, when less than lowest set temperature (heat supply
Season is higher than highest setting temperature) when, the electric control valve of the subregion loop, such cycle criterion control are opened by master controller
System.It so control, can not only ensure the thermal balance and stability in vertical underground pipe region, source pump can also be made stable
Effec-tive Function.
Electric control valve on each subregion loop is switched by main controller controls, real temperature when being gathered by temperature transmitter
Degree, calorimeter collection heat flow data, master controller judge the working condition of each subregion loop according to the temperature of collection, entirely
Control is automatically performed by master controller, and without manual intervention, manipulation is convenient, while improves the safety of vertical underground pipe system
Property.
The research of the present invention
The strategy that buried tube heat exchanger proposed by the present invention is run by inside and outside, block, space partition, is built using CFD software
10 × 10 gang of wells model has been found, in order to improve the accuracy of model, has vertically been drawn model according to soil layering characteristic
Divide 14 layers, and physical parameter is set respectively.It is determined that have chosen endogenous pyrogen model during heat transfer model, the model regards heat exchanger as
Equivalent endogenous pyrogen, heat exchanger internal flow situation is not considered, endogenous pyrogen item is added in energy hole equation.To soil
Interior heat transfer, system discharges heat, thermal source Xiang Weizheng to soil during refrigerating operaton operating mode；During heating operation operating mode system need from
Draw heat in soil, now thermal source item is negative.To earth-source hot-pump system in three kinds of subregions with being run under not subregion operation reserve
Carry out numerical simulation within 10 years, analyze influence of the different operation reserves to underground temperature field, finally drawn inside and outside subregion plan
Slightly preferred plan.
The result of research
Have studied under inside and outside partitioning strategies earth-source hot-pump system soil is different inhale heat release than being run 10 years under operating mode after
The distribution of Soil Temperature Field, the results showed that, when soil suction thermal discharge unbalance factor is larger, partitioning strategies effect is more preferable；Meanwhile
The problem of have studied under inside and outside partition running strategy the hot interference characteristic between drilling well, show that inside and outside partitioning strategies can significantly subtract
Hot interference effect between light gang of wells.
Establish endogenous pyrogen governing equation
The governing equation of endogenous pyrogen model obtains on the basis of the three big conservation equation such as conservation of energy, according to this model
Assumed condition carry out equation items on simplification or increase, it is as follows：
1) heat transfer equation in the outer soil of drilling
Heat transfer in soil outside drilling is common heat transfer type, it can be seen from Fourier's therorem, its heat conduction differential side
Cheng Wei：
Endogenous pyrogen is not present in soil outside in view of drilling, and the pipe laying depth of vertical ground heat exchanger compares its week
The distance on side is much smaller, therefore the longitudinal direction heat exchange of the negligible outer soil of drilling, therefore above formula is changed into：
In formula：ρ-soil density, kg/m3；
λ-soil thermal conductivity, W/ (mk)；
C-specific heat capacity, J/ (kgK)；
rb- boring radius, m.
2) heat transfer equation in drilling
Heat transfer in drilling can be derived from according to the Heat Conduction Differential Equations under cylindrical-coordinate system, and its equation is：
For the vertical underground pipe of cylindrical type, its conduction process can only consider the heat transfer along the axial direction of cylinder,
Therefore equation can be reduced to
Above formula progress differential can be obtained：
(r≤rb)
In formula：ρ-backfilling material density, kg/m3；
λ-backfilling material thermal conductivity factor, W/ (mk)；
C-backfilling material specific heat, J/ (kgK)；
qV- endogenous pyrogen item, W/m3。
3) endogenous pyrogen item
Endogenous pyrogen will be equivalent within drilling, its expression formula is
In formula：qL- unit well depth heat exchange amount, W/m；
L-drilling effective depth, m；
S-drilling cross-sectional area, m2。
Boundary condition and primary condition processing
According to model it is assumed that it is research object to choose 3D region model, nest of tubes is simulated on the vertical direction of zoning
Four side boundaries be arranged to boundary condition.
Before simulation buried tube heat exchanger operation, it is assumed that each layer Soil Temperature Field is uniform in whole zoning, and temperature is just
It is each layer soil initial temperature Τ c.
Because buried tube heat exchanger belongs to intermittent operation mode, during shutdown, although source item no longer works, diabatic process
Still carrying out, it is also more important how primary condition and boundary condition now are handled.When earth-source hot-pump system is out of service
When, the soil moisture is the temperature value kept at that moment of system-down, in the numerical computations then carried out, is equivalent to endogenous pyrogen
Buried tube heat exchanger no longer exchanged heat, the endogenous pyrogen item numerical value in governing equation can consider to be zero.Soil now
Temperature primary condition is then the temperature value at system that preceding moment out of service, and condition in addition no longer changes.
Analyzed more than, 4 sides of this research model zoning are defined as wall, can be set to isothermal side during calculating
Boundary's condition, its value are the initial temperature of each layer soil；Consider for simplifying for model, ignore the heat exchange of soil surface and air
Amount, top and bottom are also defined as wall, due to influenceing very little to result of calculation, therefore are arranged to adiabatic boundary condition；In drilling
Portion is then defined as thermal source item, and numerical value can be calculated according to the heat transfer equation in the outer soil of formula drilling, when its sign convention is absorbed heat
It is negative, for just during heat release..This research soil thermal property parameter uses project soil geo-thermal response test result.
This research determines that different subregions pipe laying changes according to a cooling or different load rate accounts in heat supply season number of days
The length of hot device run time, i.e., when cooling or heating season just start, required load is often smaller, only runs outskirt and buries
Heat exchange of heat pipe；With the extension of time, load needed for building also gradually increases, at this moment need to increase heat exchanger operation quantity,
Zhong-1 block heat exchanger is opened, outskirt heat exchanger continues to run with；When load continues increase, two area's buried tube heat exchangers in opening, in
One area and outskirt heat exchanger continue to run with；When load reaches Design cooling load needed for building, i.e. rate of load condensate reaches 100%, interior
Area's buried tube heat exchanger is opened, and now the heat exchanger in whole pipe laying region is all in running status.Then building load starts to drop again
Low, vertical ground heat exchanger reversely reduces operation successively, is in transition season earth-source hot-pump system and shuts down Restoration stage.
The present invention is based on certain city's earth source heat pump project data, is adopted for the method for operation of the vertical ground heat exchanger of the engineering
With the intermittent operation mode run half a day, half a day shuts down, i.e., in the daylong time, daytime runs 12 hours, shut down at night
12 hours, and system starts from winter operation, run time is 120 days, and transition season is shut down 60 days, and then system is in summer fortune
OK, run time is all 120 days, and transition season is shut down 60 days again, and the above is annual operating condition, runs 10 years, follows every year altogether
Ring is reciprocal.According to Practical Project thermal response experimental results, freeze season when, be 70W/m per linear meter(lin.m.) well depth heat exchange amount, heating season
When, it is 35W/m per linear meter(lin.m.) well depth heat exchange amount, i.e., pipe laying regional soil suction thermal discharge ratio is taken as 2:1, summer unit is arranged to soil
The heat put is in the ascendance.
1st, the numerical simulation of pipe laying difference operation reserve and analysis and research under 10 years operating modes of system operation
Soil moisture layer can substantially be divided into troposphere, thermostat layer and thermosphere, and the thermostat layer soil moisture is relatively stable, right
Cause that the analysis and research of change of temperature field are more convenient and error is smaller because external condition changes, according to ground temperature monitoring materials
Understand, the thermostat layer 40m probably located underground of the project pipe laying region at, initial temperature is 14.9 DEG C, and different temperatures is at any time at this
Between the trend such as following table that changes
The not temperature change under subregion operating condition of table 1
The temperature change of 2 operation reserve of the present invention of table
10 years operation analog results of vertical buried pipe ground-source heat pump system can be with bright under comprehensive sub-areas and not partitioning strategies
It is aobvious to draw a conclusion：In the annual suction thermal discharge imbalance of system soil, partitioning strategies is for not partitioning strategies to pipe laying
The alleviation of region heat build-up phenomenon has larger benefit.Contrasted for three kinds of different subregions strategies, in system operation 10 years
Afterwards, pipe laying regional soil mean temperature and minimum temperature variation tendency are consistent, and mean temperature is differed within 0.3 DEG C, lowest temperature
Degree difference is even more within 0.05 DEG C.Although this main cause is different subregions strategy heat exchanger method of operation difference, fortune
Row time and the heat taken to soil row are equal, and for same pipe laying region, the soil mean temperature under partitioning strategies is basic
It is identical, and because soil initial temperature is all 14.9 DEG C, even if summer heat exhaust is bigger, will not also makes whole zoning
The soil moisture of distal border has a larger increase, is also maintained at the original temperature of soil.But the change of pipe laying region maximum temperature
Three kinds of different subregions strategy difference of change are larger, and interior, domestic and abroad subregion maximum temperature is minimum, and goes out water temperature no more than system condensing side
Degree, and other two kinds of partitioning strategies maximum temperatures have been above 35 DEG C, part buried tube heat exchanger has lost heat exchange effect, wherein
Maximum temperature is up to 40.65 DEG C under block partitioning strategies operating mode, and hot stack is serious, and system energy efficiency is minimum.
2nd, partition running and between subregion operation reserve is not gone into the well heat interference research
When analyzing heat interference between each pipe well for not subregion operating condition, 5 monitoring points are chosen in pipe laying region, with being
System operation exports the temperature value of each monitoring point year by year.1#~5# monitoring points are respectively positioned on the midpoint of adjacent drill center line, such as
Shown in Fig. 6.Analyze inside and outside operation reserve go into the well between heat interference, the setting of its monitoring location and inside and outside partitioning strategies phase
Together.Because the heat exchange in the whole pipe laying region of block subregion is not symmetrical, therefore studying monitoring point when heat between well is disturbed needs
Set by different subregions, each monitoring point establishing method is consistent with above-mentioned strategy, as shown in Figure 7.As block partitioning strategies,
It is also to be set by different subregions every the monitoring point of subregion, because different subregions are arranged symmetrically along central axis, so monitoring point
General area is arranged in each subregion, as shown in Figure 8.
Study influence of the partitioning strategies heat interference pipe well under extensive gang of wells applicable cases.According to pipe laying region
The monitoring point temperature of setting analyzes the hot annoyance level between different pipe wells with the change of run time.
Table 3 changes with time for each monitoring point temperature under not subregion operating condition.
Each monitoring point temperature changes with time under 4 operation reserve of the present invention of table
Partition running and not subregion operation reserve hot interference simulation result between going into the well under comprehensive sub-areas and not partitioning strategies
Conclusion can be apparent from：Alleviation of the partitioning strategies to the hot interference phenomenon of pipe laying region heat for not partitioning strategies has
Larger benefit.It has studied three kinds of partition running strategies and between subregion operation reserve is not gone into the well the problem of heat interference, comparative analysis obtains
The situation of heat interference between pipe well can be significantly improved by going out inside and outside subregion, and the heat exchange efficiency of heat exchanger is higher, and system energy consumption is lower.
Heat interference concrete condition is as follows：
For not subregion operating condition, heat interference is mainly reflected between the pipe well of inner region and near zone；In use is interior
During outer partition running strategy, without heat interference between middle area and the 4th subregion.Region between Zhong Qu and middle area and the first subregion
Occurs weaker hot interference phenomenon between buried tube heat exchanger；When using block partition running strategy, the first subregion occurs sternly
Reheat interference, there is also interactional situation between the second subregion and the 3rd subregion, this be to whole system operation it is unfavorable,
There is not hot interference phenomenon in 4th subregion；When using space partition operation reserve, each partitioned area of space partition strategy
Heat interference all be present, be unfavorable for system operation.
It is above-mentioned with reference to embodiment to a kind of extensive vertical ground heat exchanger subregion framework of earth-source hot-pump system and
The detailed description that its operation reserve is carried out, is illustrative rather than limited, can be included according to limited scope some
Individual embodiment, therefore changing and modifications in the case where not departing from present general inventive concept, should belong within protection scope of the present invention.
Claims (5)
1. a kind of extensive vertical ground heat exchanger subregion framework of earth-source hot-pump system, including some groups of vertical underground pipes,
It is characterized in that：Some groups of vertical underground pipes are in partition set-up structure, and the partition set-up structure is followed successively by from inside to outside
One subregion, the second subregion, the inside and outside partitioned organization of the 3rd subregion and the 4th subregion, the vertical underground pipe of partition set-up structure lead to
Pipeline to be crossed to be connected with water knockout drum and water collector respectively, the water knockout drum and water collector are connected by house steward with earth source heat pump unit,
Motor-operated control valve and temperature transmitter and calorimeter are installed, temperature on the branch pipe that water knockout drum and water collector are connected with vertical underground pipe
Transmitter and the connection of the control terminal of calorimeter and motor-operated control valve are spent, motor-operated control valve connects and composes vertical buried with master controller
The zonal control loop of pipe.
2. the extensive vertical ground heat exchanger subregion framework of earth-source hot-pump system according to claim 1, its feature
It is：The partition set-up structure is block partitioned organization, and whole pipe laying region is in cartesian coordinate system, and origin is in pipe laying region
The heart, the first subregion of vertical underground pipe are located at fourth quadrant, and the second subregion is located at the second quadrant, the 3rd subregion positioned at first as
Limit, the 4th subregion are located at third quadrant.
3. the extensive vertical ground heat exchanger subregion framework of earth-source hot-pump system according to claim 1, its feature
It is：The partition set-up structure is space partition structure, and vertical underground pipe is at zoning, by topmost near pipe laying area
The vertical underground pipe of three rows of overseas side is divided into the first subregion, the vertical underground pipe of three rows by bottom near pipe laying areas outside
The second subregion is divided into, the vertical underground pipe of the row of penetralia two is divided into the 4th subregion, the vertical underground pipe of remaining two row is drawn
It is divided into the 3rd subregion.
4. the extensive vertical ground heat exchanger subregion framework of the earth-source hot-pump system according to claim 1 or 2 or 3,
It is characterized in that：The vertical underground pipe quantity of each subregion of partition set-up structure accounts for the ratio of whole vertical underground pipe quantity with being somebody's turn to do
The rate of load condensate that subregion is undertaken is identical；
The vertical underground pipe number calculation formula of each subregion of partition set-up structure is：
N=a*N
In formula：N-vertical underground pipe a total of tubes
The rate of load condensate that a-subregion pipe laying is undertaken.
5. a kind of operation reserve of ground heat exchanger subregion framework vertical according to claim 1, it is characterized in that：It is determined that hang down
After Boundary Conditions in Structures and the hot physical property of soil that straight underground pipe regional compartmentalization is set, run time is taken compared with it when opening operation
The longer exterior lateral area in his region is preferentially run, then gradually ecto-entad region is run district by district successively；When out of service use by
The interior operation reserve closed district by district to exterior domain, make full use of limited border to transmit heat, comprise the following steps that：In cooling or
The first subregion is run when heat supply season just starts first, as load increases, the second subregion of increase operation, the 3rd subregion and the successively
Four subregions；When load is reduced, the 4th subregion is out of service first, then the 3rd subregion out of service, the second subregion successively, and
One subregion is finally out of service.
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| CN110530536A (en) * | 2019-10-14 | 2019-12-03 | 机械工业勘察设计研究院有限公司 | The monitoring of ground source heat pump imbedded pipe area temperature field and analysis method |
| CN111636475A (en) * | 2020-05-06 | 2020-09-08 | 山东省煤田地质局第四勘探队 | Underground buried pipe structure of building foundation and drilling construction method thereof |
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