Integrated system and method for phase change heat storage and heat scheduling of prefabricated integrated pipeline corridor

Abstract

The present invention provides an integrated system and method for phase-change heat storage and heat scheduling of an assembled integrated pipe gallery, comprising: an interface pipe gallery, which is internally provided with a load-side inlet pipe, a load-side outlet pipe, a phase-change box outlet pipe, and a phase-change box inlet pipe; a heat exchange pipe gallery, which is arranged on one side of the interface pipe gallery; a heat exchange unit is arranged inside the heat exchange pipe gallery; the heat exchange unit includes a power assembly, a diverter, a phase converter, an upper longitudinal heat exchange pipe, and a lower longitudinal heat exchange pipe; and an energy storage pipe gallery, which is arranged on the side of the heat exchange pipe gallery away from the interface pipe gallery. By pre-setting the heat exchange pipeline and the phase-change box in the components of the assembled integrated pipe gallery, a pipe gallery module that can be flexibly arranged, such as the interface pipe gallery, the heat exchange pipe gallery, and the energy storage pipe gallery, is formed. The module can flexibly adjust the layout position of the interface pipe gallery according to the position of the load building above, thereby minimizing the distance from the load building to the heat exchange pipe leading out of the pipe gallery, reducing the heat loss of the heat energy transmission path, and improving the overall utilization efficiency.

Description

Technical Field

[0001] The present invention relates to the field of underground engineering technology, and specifically to an integrated system and method for phase-change heat storage and heat scheduling in an assembled integrated pipe gallery. Background Art

[0002] Existing underground integrated pipe corridors are mostly responsible for the centralized laying of pipelines such as electricity, communications, and water supply and drainage. Against the backdrop of growing demand for the construction of smart energy systems, there is still a lack of integrated solutions that can integrate thermal energy collection, storage, and scheduling. In particular, it is difficult to effectively deal with related problems in high load fluctuations and complex geological environments. Traditional geothermal pipe corridors are mostly fixed in layout and cannot adapt to changes in the load area of ​​the upper building, differences in the heat source area and the seepage area, which lead to low heat transfer efficiency, large temperature fluctuations, unstable operation, etc., especially in underground environments with inconsistent horizontal and vertical thermal disturbances. Therefore, there is a need for an integrated phase change heat storage and heat scheduling system suitable for prefabricated integrated pipe corridors to solve the above problems. Summary of the Invention

[0003] In response to the above-mentioned technical deficiencies, the purpose of the present invention is to provide an integrated system and method for phase change heat storage and heat scheduling of an assembled integrated pipeline corridor, thereby minimizing the distance from the load building to the heat exchange pipes leading out of the pipeline corridor, reducing heat loss in the heat energy transmission path, and improving overall utilization efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An integrated system of phase-change heat storage and heat dispatching for an assembled integrated pipe gallery, comprising:

[0006] The interface pipe gallery is provided with an interface boss on the top, and is internally provided with a load side inlet pipe, a load side outlet pipe, a phase change box outlet pipe, and a phase change box inlet pipe; one end of the load side inlet pipe and the load side outlet pipe are connected to the interface boss;

[0007] The heat exchange corridor is arranged on one side of the interface corridor; a heat exchange unit is arranged inside the heat exchange corridor; the heat exchange unit includes a power assembly, a diverter, a phase converter, an upper longitudinal heat exchange tube, and a lower longitudinal heat exchange tube; the upper longitudinal heat exchange tube is fixed to the upper side of the interior of the heat exchange corridor, and the lower longitudinal heat exchange tube is fixed to the lower side of the interior of the heat exchange corridor; the power assembly, the diverter, the lower longitudinal heat exchange tube, the phase converter, and the upper longitudinal heat exchange tube are connected in sequence to form a loop; the phase converter box outlet pipe and the phase converter box inlet pipe are arranged to pass through the heat exchange corridor;

[0008] The energy storage pipe gallery is arranged on the side of the heat exchange pipe gallery away from the interface pipe gallery; a phase change box is arranged inside the energy storage pipe gallery; the phase change box outlet pipe, the phase change box inlet pipe, the phase converter and the phase change box are connected.

[0009] Preferably, the interface pipe gallery, heat exchange pipe gallery and energy storage pipe gallery are all provided with phase change pipe groove support plates for fixing the phase change box outlet pipe and the phase change box inlet pipe; the interface pipe gallery, heat exchange pipe gallery and energy storage pipe gallery are all provided with installation grooves; the upper part of the installation groove is provided with an installation groove support plate; the power assembly is arranged in the installation groove of the heat exchange pipe gallery.

[0010] Preferably, a guide plate is provided on the mounting groove support plate of the heat exchange pipe gallery; a guide slope is provided in the mounting groove on one side of the guide plate, and a diffusion cavity is provided on the other side; the power assembly is placed below the guide plate.

[0011] Preferably, the power assembly includes a fixed plate and a piston pump and a hydraulic oil tank installed on the fixed plate; the piston pump is provided with a front cavity outlet, a front cavity inlet, a rear cavity outlet, and a rear cavity inlet; a flow thermometer is installed on the front cavity outlet and the rear cavity outlet; the hydraulic oil tank is connected to the piston pump through a hydraulic oil pipe to provide driving power for the piston pump; the front cavity inlet is connected to the front cavity inlet pipe; the front cavity outlet is connected to the front cavity outlet pipe; the rear cavity inlet is connected to the rear cavity inlet pipe; the rear cavity outlet is connected to the rear cavity outlet pipe; solenoid valves are installed on the front cavity inlet pipe and the rear cavity inlet pipe; and the ends of the front cavity outlet pipe and the rear cavity outlet pipe are connected to one-way valves.

[0012] Preferably, the phase changer includes a heat exchange channel, a heat insulation plate, an energy storage channel, and a phase change unit; a plurality of phase change units are configured; the heat exchange channel is fixed at the upper end of the heat insulation plate, and the energy storage channel is fixed at the lower end of the heat insulation plate; a connecting hole connecting the heat exchange channel and the energy storage channel is provided on the heat insulation plate; a mounting hole adapted to the phase change unit is provided on the heat exchange channel, and the lower end of the phase change unit is inserted into the energy storage channel from the outside of the heat exchange channel through the mounting hole and the connecting hole; the two ends of the heat exchange channel are respectively connected to the phase change box outlet pipe and the phase change box inlet pipe; the two ends of the energy storage channel are respectively connected to the upper longitudinal heat exchange tube and the lower longitudinal heat exchange tube.

[0013] Preferably, the phase change unit includes a phase change cylinder, a sealing top cover and a tightening wrench; the phase change cylinder is inserted into the insulation plate between the heat exchange channel and the energy storage channel; the tightening wrench is installed on the sealing top cover; the sealing top cover is buckled on the phase change cylinder and fixed by the tightening wrench.

[0014] Preferably, there are two piston pumps, including a first piston pump and a second piston pump; the diverters and phase converters are each configured with two corresponding to the two piston pumps, and are correspondingly arranged on the sides of the first piston pump and the second piston pump, including a first diverter, a second diverter, a first phase converter and a second phase converter; the front cavity outlet pipe and the rear cavity inlet pipe of the first piston pump and the second piston pump are connected to the first diverter through a first cross-corridor pipe, and the front cavity inlet pipe and the rear cavity outlet pipe are connected to the second diverter through a second cross-corridor pipe.

[0015] Preferably, the upper longitudinal heat exchange tubes and the lower longitudinal heat exchange tubes are both provided with pipe elbows; the heat exchange tube gallery is provided with pipe embedding grooves connected to the upper longitudinal heat exchange tubes, the lower longitudinal heat exchange tubes and the pipe elbows, and the pipe embedding grooves are connected with grouting holes.

[0016] Preferably, the interface pipe gallery, heat exchange pipe gallery, and energy storage pipe gallery are all provided with a top plate, a left plate, a bottom plate, a right plate, and a partition wall; the top plate, the left plate, the bottom plate, and the right plate are connected in sequence to form a ring; the upper end of the partition wall is fixedly connected to the top plate, and the lower end is fixedly connected to the bottom plate; there are two partition walls, which are arranged parallel to each other and spaced apart; the installation groove is arranged on the bottom plate and is located between the two partition walls; the phase change box outlet pipe, the phase change box inlet pipe, and the phase converter are located on the side of the partition wall away from the installation groove.

[0017] A method for phase-change heat storage and scheduling of an assembled integrated pipe gallery, comprising the following steps:

[0018] Step S1: Setting the solidification temperature range of the phase change unit according to the phase change hysteresis test results of the phase change material in the phase change unit T P,mi and melting temperature range T P,ma The solidification temperature at the current moment is calculated by the following formula T mi and melting temperature T ma ;

[0019] Step S2: According to the solidification temperature T mi and melting temperature T ma Calculate the attenuation parameters of the phase change unit at the next running time D P (t+1) ;

[0020] Step S3: The temperature of the flow in and out of the phase converter at the current operating time measured by the flow thermometer T D,i and T D,o , the temperature of the working medium flowing into and out of the phase converter T B,i and T B,o , the temperature of the load side inflow and outflow of the phase converter T L,i and T L,o Calculate the heat transfer power of the phase change box separately Q D , buried pipe heat exchange power Q B and load side heat exchange powerQ L ;

[0021] Step S4: The heat exchange power of the phase change box at the current operating time is Q D , the heat exchange rate of the phase change unit in the first phase converter and the second phase converter dU P,1 (t) / dt and dU P,2 (t) / dt , Phase transformer bypass parameters γ(t) Calculate the phase transformer bypass parameters for the next operating moment γ(t+1) ;

[0022] Step S5: Calculate the heat exchange rate of the phase change unit in the first phase converter and the second phase converter at the next operating moment according to the energy conservation equation. dU P,1 (t+1) / dt and dU P,2 (t+1) / dt ;

[0023] Step S6: According to the heat exchange rate of the phase change unit dU P,1 (t+1) / dt and dU P,2 (t+1) / dt , attenuation parameters D P,1 (t +1) and D P,2 (t+1) , determine the state of the piston pump at the next operating moment;

[0024] Step S7: perform loop iterations at different running times according to the above calculation process.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention is an integrated system for phase-change heat storage and heat scheduling suitable for prefabricated integrated pipe corridors and its scheduling strategy. By pre-setting heat exchange pipelines and phase change boxes in the components of the prefabricated integrated pipe corridor, a flexible pipe corridor module is formed, including an interface pipe corridor, a heat exchange pipe corridor, and an energy storage pipe corridor. The module can flexibly adjust the layout position of the interface pipe corridor according to the position of the load building above, thereby minimizing the distance from the load building to the heat exchange pipe leading out of the pipe corridor, reducing heat loss in the heat energy transmission path, and improving overall utilization efficiency. At the same time, the energy storage pipe corridor is flexible in layout and can avoid areas with severe groundwater seepage, further enhancing heat storage stability and system thermal efficiency.

[0027] (2) The present invention is an integrated phase change heat storage and heat scheduling system and its scheduling strategy applicable to prefabricated integrated pipe corridors. By introducing a double-cylinder piston pump and a parallel reversing circuit, the working medium can flow in both directions within the pipe corridor, solving the problem of heat exchange degradation caused by uneven lateral thermal disturbance. At the same time, by arranging distributed phase converters and phase change boxes inside the pipe corridor, waste heat collection from high geothermal areas and heat energy transmission to low geothermal areas can be achieved, thereby alleviating the problem of uneven longitudinal thermal disturbance. With the heat storage and release buffering capacity of the phase change unit, the temperature fluctuation at the load end can be balanced, and the stability of the system operation can be improved.

[0028] (3) The present invention is an integrated phase-change heat storage and heat scheduling system and its scheduling strategy for prefabricated integrated pipe corridors. By constructing a scheduling strategy system that couples single-pipe corridor regulation with system-wide coordination, it achieves coordinated regulation of horizontal and vertical thermal energy utilization in the spatial dimension and supports energy storage and delayed release in the temporal dimension, effectively alleviating the problem of uneven heating and cooling between regions. Through automated control, the system has adaptive adjustment capabilities, which can reduce human intervention and improve overall operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of the integrated system of phase-change heat storage and heat scheduling for the prefabricated integrated pipe gallery of the present invention;

[0030] Figure 2 Schematic diagram of the structure of the interface pipe gallery in the present invention;

[0031] Figure 3 Schematic diagram of the structure of the heat exchange corridor in the present invention;

[0032] Figure 4 Schematic diagram of the bottom plate structure of the heat exchange corridor in the present invention;

[0033] Figure 5 Schematic diagram of the structure of the piston pump in the present invention;

[0034] Figure 6 Schematic diagram of the heat exchange corridor in the present invention;

[0035] Figure 7 Schematic diagram of the structure of the phase converter in the present invention;

[0036] Figure 8 It is a structural schematic diagram of the energy storage corridor in the present invention.

[0037] in:

[0038] 1. Interface pipe gallery; 2. Heat exchange pipe gallery; 3. Energy storage pipe gallery; 4. Top plate; 5. Left side plate; 6. Bottom plate; 7. Right side plate; 8. Partition wall; 9. Load side inlet pipe; 10. Load side outlet pipe; 11. Interface boss; 12. Mounting slot support plate; 13. Mounting slot; 14. Phase change pipe slot support plate; 15. Phase change box outlet pipe; 16. Phase change box inlet pipe; 17. Embedded pipe slot; 18. Grouting hole; 19. Guide slope; 20. Guide plate; 21. Diffusion chamber; 22. First piston pump; 23. Second piston pump; 24. Flow thermometer; 25. One-way valve; 26. Hydraulic oil tank; 27. Hydraulic oil pipe; 28. Fixing plate; 29. ​​Front chamber outlet; 30. Front chamber inlet; 31. Front chamber outlet pipe; 32. Front chamber inlet pipe ; 33. Solenoid valve; 34. Rear cavity outlet; 35. Rear cavity inlet; 36. Rear cavity inlet pipe; 37. Rear cavity outlet pipe; 38. First cross-corridor pipe; 39. Second cross-corridor pipe; 40. First diverter; 41. Second diverter; 421. Upper longitudinal heat exchange tube, 422. Lower longitudinal heat exchange tube; 43. Pipe elbow; 44. Second phase converter inlet pipe; 45. Second phase converter; 46. Phase converter unit; 47. Second phase converter outlet pipe; 48. First phase converter inlet pipe; 49. First phase converter; 50. First phase converter outlet pipe; 51. Heat exchange channel; 52. Heat insulation board; 53. Energy storage channel; 54. Tightening wrench; 55. Sealing top cover; 56. Phase converter cylinder; 57. First phase converter box; 58. Second phase converter box. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] like Figures 1 to 3 、 Figure 6 As shown, an integrated system of phase-change heat storage and heat dispatching for an assembled integrated pipe gallery includes:

[0041] The interface pipe gallery 1 is provided with an interface boss 11 on the top, and is provided with a load-side inlet pipe 9, a load-side outlet pipe 10, a phase change box outlet pipe 15, and a phase change box inlet pipe 16 inside. One end of the load-side inlet pipe 9 and the load-side outlet pipe 10 is connected to the interface boss 11 and introduced into the building HVAC system.

[0042] The heat exchange gallery 2 is arranged on one side of the interface gallery 1; a heat exchange unit is arranged inside the heat exchange gallery 2; the heat exchange unit includes a power assembly, a diverter, a phase converter, an upper longitudinal heat exchange tube 421, and a lower longitudinal heat exchange tube 422; the upper longitudinal heat exchange tube 421 is fixed to the upper side of the interior of the heat exchange gallery 2, and the lower longitudinal heat exchange tube 422 is fixed to the lower side of the interior of the heat exchange gallery 2; the power assembly, the diverter, the lower longitudinal heat exchange tube 422, the phase converter, and the upper longitudinal heat exchange tube 421 are connected in sequence to form a loop; the phase change box outlet pipe 15 and the phase change box inlet pipe 16 are arranged to pass through the heat exchange gallery 2;

[0043] The energy storage pipe gallery 3 is arranged on the side of the heat exchange pipe gallery 2 away from the interface pipe gallery 1; a phase change box is arranged inside the energy storage pipe gallery 3; the phase change box outlet pipe 15, the phase change box inlet pipe 16, and the phase converter are connected to the phase change box.

[0044] The interface pipe gallery 1, the heat exchange pipe gallery 2 and the energy storage pipe gallery 3 are longitudinally assembled into a whole. The upper longitudinal heat exchange pipes 421 and the lower longitudinal heat exchange pipes 422 are pre-buried in the heat exchange pipe gallery 2.

[0045] like Figure 2 、 Figure 3 、 Figure 8 As shown, in this embodiment, the interface pipe gallery 1, the heat exchange pipe gallery 2 and the energy storage pipe gallery 3 are all provided with a phase change pipe groove support plate 14 for fixing the phase change box outlet pipe 15 and the phase change box inlet pipe 16; the interface pipe gallery 1, the heat exchange pipe gallery 2 and the energy storage pipe gallery 3 are all provided with a mounting groove 13; the upper part of the mounting groove 13 is provided with a mounting groove support plate 12, which is buckled on the mounting groove 13 to protect the internal components of the mounting groove 13; the power component is arranged in the mounting groove 13 of the heat exchange pipe gallery 2.

[0046] like Figure 5 As shown, in this embodiment, the power assembly includes a fixed plate 28 and a piston pump and a hydraulic oil tank 26 installed on the fixed plate 28; the piston pump is provided with a front cavity outlet 29, a front cavity inlet 30, a rear cavity outlet 34, and a rear cavity inlet 35; a flow thermometer 24 is installed on the front cavity outlet 29 and the rear cavity outlet 34; the flow and temperature of the first piston pump 22 and the second piston pump 23 are monitored by the flow thermometer 24; the hydraulic oil tank 26 is connected to the piston pump through a hydraulic oil pipe 27 to provide driving power for the piston pump; the front cavity inlet 30 is connected to the front cavity inlet pipe 32; the front cavity outlet 29 is connected to the front cavity outlet pipe 31; the rear cavity inlet 35 is connected to the rear cavity inlet pipe 36; the rear cavity outlet 34 is connected to the rear cavity outlet pipe 37; the front cavity inlet pipe 32 and the rear cavity inlet pipe 36 are both installed with solenoid valves 33; the ends of the front cavity outlet pipe 31 and the rear cavity outlet pipe 37 are both connected to one-way valves 25. The solenoid valve 33 and the one-way valve 25 control the reversing and non-return functions of the two piston pumps respectively.

[0047] like Figure 6 、 Figure 7As shown, in this embodiment, the phase changer includes a heat exchange channel 51, a heat insulation plate 52, an energy storage channel 53, and a phase change unit 46; a plurality of phase change units 46 are configured; the heat exchange channel 51 is fixed to the upper end of the heat insulation plate 52, and the energy storage channel 53 is fixed to the lower end of the heat insulation plate 52; the heat insulation plate 52 is provided with a connecting hole connecting the heat exchange channel 51 and the energy storage channel 53; the heat exchange channel 51 is provided with a mounting hole adapted to the phase change unit 46, and the lower end of the phase change unit 46 is inserted into the energy storage channel 53 from the outside of the heat exchange channel 51 through the mounting hole and the connecting hole; the two ends of the heat exchange channel 51 are respectively connected to the phase change box outlet pipe 15 and the phase change box inlet pipe 16; the two ends of the energy storage channel 53 are respectively connected to the upper longitudinal heat exchange tube 421 and the lower longitudinal heat exchange tube 422.

[0048] like Figure 7 As shown, in this embodiment, the phase change unit 46 includes a phase change cylinder 56, a sealing top cover 55, and a tightening wrench 54. The phase change cylinder 56 is inserted into the heat insulation plate 52 between the heat exchange channel 51 and the energy storage channel 53. The tightening wrench 54 is mounted on the sealing top cover 55. The sealing top cover 55 snaps onto the phase change cylinder 56 and is secured by the tightening wrench 54. One end of the phase change cylinder 56 is inserted into the heat exchange channel 51 to exchange heat with the working medium, and the other end is inserted into the energy storage channel 53 to exchange heat with the second phase change tank 58. The working medium is water.

[0049] like Figure 6 As shown, in this embodiment, two piston pumps are configured, including a first piston pump 22 and a second piston pump 23, which are installed in parallel on the fixed plate 28; two diverters and phase converters are configured for each of the two piston pumps, which are correspondingly arranged on the sides of the first piston pump 22 and the second piston pump 23, including a first diverter 40, a second diverter 41, a first phase converter 49 and a second phase converter 45; the front cavity outlet pipe 31 and the rear cavity inlet pipe 36 of the first piston pump 22 and the second piston pump 23 are connected to the first diverter 40 through the first cross-corridor pipe 38, and the front cavity inlet pipe 32 and the rear cavity outlet pipe 37 are connected to the second diverter 41 through the second cross-corridor pipe 39, forming a heat exchange tube loop that can switch direction.

[0050] like Figure 6 As shown, in this embodiment, pipe elbows 43 are provided on the upper longitudinal heat exchange tubes 421 and the lower longitudinal heat exchange tubes 422, so that the upper longitudinal heat exchange tubes 421 and the lower longitudinal heat exchange tubes 422 are in a coil structure, thereby increasing the heat exchange time; the heat exchange tube gallery 2 is provided with pipe embedding grooves 17 connected to the upper longitudinal heat exchange tubes 421, the lower longitudinal heat exchange tubes 422, and the pipe elbows 43, and the pipe embedding grooves 17 are connected to grouting holes 18, and the upper longitudinal heat exchange tubes 421, the lower longitudinal heat exchange tubes 422, and the pipe elbows 43 are sealed and fixed by grouting.

[0051] In this embodiment, the interface pipe gallery 1, the heat exchange pipe gallery 2, and the energy storage pipe gallery 3 are all provided with a top plate 4, a left side plate 5, a bottom plate 6, a right side plate 7, and a partition wall 8; the top plate 4, the left side plate 5, the bottom plate 6, and the right side plate 7 are connected in sequence to form a ring; the upper end of the partition wall 8 is fixedly connected to the top plate 4, and the lower end is fixedly connected to the bottom plate 6; there are two partition walls 8, which are arranged parallel to each other and spaced apart; the installation groove 13 is arranged on the bottom plate 6 and is located between the two partition walls 8; the phase change box outlet pipe 15, the phase change box inlet pipe 16, and the phase converter are located on the side of the partition wall 8 away from the installation groove 13.

[0052] In this embodiment, the phase change box is a common phase change water tank with a built-in heat exchanger and a small water pump. It is a common phase change heat storage unit. The phase change box is connected to the energy storage flow channel in the phase changer through the phase change box inlet pipe and the phase change box outlet pipe on both sides, and exchanges heat with the phase change unit; the small water pump is a double-cylinder piston pump; there are two phase change boxes, including a first phase change box 57 and a second phase change box 58 with the same structure; the first phase change box 57 and the second phase change box 58 are installed in the installation groove 13, and are connected to the first phase changer 49 and the second phase changer 45 in the heat exchange corridor 2 through the phase change box outlet pipe 15 and the phase change box inlet pipe 16. The first piston pump 22 and the second piston pump 23 are connected to the first diverter 40 and the second diverter 41 through the first cross-corridor pipe 38 and the second cross-corridor pipe 39. The first diverter 40 is connected to the lower longitudinal heat exchange pipe 422 in the bottom plate 6 through the heat exchange pipe. The lower longitudinal heat exchange pipe 422 in the bottom plate 6 is connected to the second phase converter 45 through the second phase converter inlet pipe 44. The second phase converter 45 is connected to the upper longitudinal heat exchange pipe 421 in the top plate 4 through the second phase converter outlet pipe 47. The upper longitudinal heat exchange pipe 421 in the top plate 4 is connected to the first phase converter 49 through the first phase converter inlet pipe 48. The first phase converter 49 is connected to the second diverter 41 through the first phase converter outlet pipe 50.

[0053] like Figure 4As shown, in this embodiment, a guide plate 20 is provided on the mounting groove support plate 12 of the heat exchange pipe gallery 2; a guide slope 19 is provided in the mounting groove 13 on one side of the guide plate 20, and a diffusion chamber 21 is provided on the other side; the power assembly is placed below the guide plate 20; heat is generated during system operation, and the mounting groove 13 is a relatively closed space. The heat generated during system operation and some of the heat when the hot fluid flows through the water pump will be dissipated into the air in the mounting groove 13. Long-term operation can easily cause the air temperature in the mounting groove 13 to rise, which not only affects the overall operating efficiency of the system, but may also affect the normal operation of the dual-cylinder piston pump and accelerate the aging and failure of components. To solve the above problems, a guide slope 19, a guide plate 20, and a diffusion chamber 21 are provided in the mounting groove 13 to provide heat dissipation protection through the convection air that usually exists inside the pipe gallery. When the convection air in the tunnel passes through the guide slope 19, it is introduced into the installation slot 13. Under the action of the guide plate 20, a downward pressure airflow is formed at the rear end. After sufficient heat exchange with the first piston pump 22 and the second piston pump 23, the convection air flows out of the guide plate 20, enters the diffusion chamber 21, and is discharged into the tunnel interior. During this process, the diffusion chamber 21 forms a low-pressure area connected to the interior of the tunnel. Under the action of the guide slope 19 and the guide plate 20, a continuous air flow path is established, achieving continuous and effective cooling of the dual-cylinder piston pump and the interior space of the installation slot 13, ensuring the long-term efficient and stable operation of the system and extending the service life of the pump body and related components.

[0054] In this embodiment, the diverter is an existing manifold with a pipe interface at one end and multiple pipe interfaces at the other end. Only one end of the pipe interface in each diverter is connected to the upper longitudinal heat exchange tube or the lower longitudinal heat exchange tube through an extension pipe; one end of the multiple pipe interfaces in each diverter must be connected to the water outlet corresponding to one cavity in the piston pump and the water inlet corresponding to another cavity through a cross-corridor pipe to achieve a reversing function.

[0055] A method for phase-change heat storage and scheduling of an assembled integrated pipe gallery, comprising the following steps:

[0056] Step S1: Setting the solidification temperature range of the phase change unit 46 according to the phase change hysteresis test results of the phase change material in the phase change unit 46 T P,mi and melting temperature range T P,ma The solidification temperature at the current moment is calculated by the following formula T mi and melting temperature T ma :

[0057] ;

[0058] In the formula dU P (t) / dtis the heat exchange rate of the phase change unit 46 at the current operating moment, θ C is the set heat exchange rate threshold. Step S2, according to the solidification temperature T mi and melting temperature T ma Calculate the attenuation parameter of the phase change unit 46 at the next operating time D P (t+ 1) : ;

[0059] Where, x latent is the initial phase change hysteresis temperature difference measured in the experiment.

[0060] Step S3: The temperature of the flow in and out of the phase converter at the current operation time measured by the flow thermometer 24 T D,i and T D,o , the temperature of the working medium flowing into and out of the phase converter T B,i and T B,o , the temperature of the load side inflow and outflow of the phase converter T L,i and T L,o Calculate the heat transfer power of the phase change box separately Q D , buried pipe heat exchange power Q B and load side heat exchange power Q L : ; ; ;

[0061] Step S4: The heat exchange power of the phase change box at the current operating time is Q D , the heat exchange rate of the phase change unit 46 in the first phase converter 49 and the second phase converter 45 dU P,1 (t) / dt and dU P,2 (t) / dt , Phase transformer bypass parameters γ(t) Calculate the phase transformer bypass parameters for the next operating moment γ(t+1) :

[0062] ;

[0063] Step S5: Calculate the heat exchange rate of the phase change unit 46 in the first phase converter 49 and the second phase converter 45 at the next operating moment according to the energy conservation equation. dU P,1 (t+1) / dt and dU P,2 (t+1) / dt , the energy conservation equation of the first phase converter 49 is:

[0064] ;

[0065] The energy conservation equation of the second phase converter 45 is:

[0066] ;

[0067] Step S6: According to the heat exchange rate of the phase change unit 46 dU P,1 (t+1) / dt and dU P,2 (t+1) / dt , attenuation parameters D P,1 (t+1) and D P,2 (t+1) , determine the state of the piston pump at the next operating moment:

[0068] ;

[0069] When condition (a) is satisfied, the flow directions of the first piston pump 22 and the second piston pump 23 are switched.

[0070] When condition (b) is satisfied, the flow directions of the first piston pump 22 and the second piston pump 23 are switched to the direction of first passing through the first phase converter 49 .

[0071] When condition (c) is satisfied, the flow directions of the first piston pump 22 and the second piston pump 23 are switched to the direction of first passing through the second phase converter 45 .

[0072] When condition (d) is satisfied, the flow directions of the first piston pump 22 and the second piston pump 23 remain unchanged, and the start and stop states of the first phase change box 57 and the second phase change box 58 are switched.

[0073] When condition (e) is met, the first piston pump 22 and the second piston pump 23 are turned off, and the first phase change box 57 and the second phase change box 58 are kept started until any one of conditions (a), (b), (c), and (d) is met by recovering the ground temperature or replacing the phase change unit 46.

[0074] Step S7: perform loop iterations at different running times according to the above calculation process.

[0075] Depending on the geothermal resources at the location of heat exchange corridor 2, the energy conservation equation may vary:

[0076] In locations with sufficient geothermal resources, the energy conservation equations for the first phase converter 49 and the second phase converter 45 in the initial stage are:

[0077] ;

[0078] After running for a period of time, the phase converter is triggered to start, and the energy conservation equation of the first phase converter 49 and the second phase converter 45 is:

[0079] ;

[0080] At a location where geothermal resources are common, the energy conservation equations for the first phase converter 49 and the second phase converter 45 in the initial stage are:

[0081] ;

[0082] After running for a period of time, the geothermal resources are less. At this time, the first phase converter 49 begins to release heat into the loop during the circulation of the working medium. The energy conservation equation of the first phase converter 49 and the second phase converter 45 is:

[0083] ;

[0084] After a period of continuous operation, the piston pump is triggered to switch flow direction. At this time, the second phase converter 45 begins to release heat into the circuit during the circulation of the working medium. The energy conservation equation of the first phase converter 49 and the second phase converter 45 is:

[0085] ;

[0086] In locations with less geothermal resources, the energy conservation equations for the first phase converter 49 and the second phase converter 45 in the initial stage are:

[0087] ;

[0088] After running for a period of time, the phase converter is triggered to start, and the energy conservation equation of the first phase converter 49 and the second phase converter 45 is:

[0089] ;

[0090] ;

[0091] Working principle:

[0092] The assembled integrated pipeline corridor phase change heat storage and heat scheduling system includes pipelines in three parts: the interface pipeline corridor 1, the heat exchange pipeline corridor 2 and the energy storage pipeline corridor 3. The working medium in the corresponding pipelines of the interface pipeline corridor 1 and the heat exchange pipeline corridor 2 is connected through the heat exchange flow channel 51 in the first phase converter 49 and the second phase converter 45, and the working medium in the corresponding pipeline of the energy storage pipeline corridor 3 operates independently.

[0093] The working medium corresponding to the pipeline in the interface pipe gallery 1 flows into the first phase converter 49 and the second phase converter 45 respectively through the load-side outlet pipes 10 on both sides, exchanges heat with the phase change unit 46 in the heat exchange channel 51, and then flows back to the load-side building through the load-side inlet pipes 9 on both sides.

[0094] The working medium corresponding to the pipeline in the heat exchange corridor 2 is pumped into the first cross-corridor pipe 38 through the first piston pump 22 and the second piston pump 23 and connected to the lower longitudinal heat exchange pipe 422 in the bottom plate 6 through the first diverter 40 and an extension pipe above. After the working medium completes heat exchange in the lower longitudinal heat exchange pipe 422, it flows into the heat exchange flow channel 51 in the second phase converter 45 through the second phase converter inlet pipe 44 to exchange heat with the working medium flowing in from the load side. After the heat exchange is completed, the working medium flows into the upper longitudinal heat exchange pipe 421 in the top plate 4 through the second phase converter outlet pipe 47. After the heat exchange is completed in the upper longitudinal heat exchange pipe 421, the working medium flows into the heat exchange flow channel 51 in the first phase converter 49 through the first phase converter inlet pipe 48 to exchange heat with the working medium flowing in from the load side. After the heat exchange is completed, the working medium is connected to the second diverter 41 through the first phase converter outlet pipe 50 and the extension pipe and flows back to the first piston pump 22 and the second piston pump 23 through the second cross-corridor pipe 39. During the operation of the first piston pump 22 and the second piston pump 23, it is necessary to change the flow direction of the piston pump according to the thermal scheduling method proposed in the patent of the present invention. When the flow direction is constant, the working medium only flows through the front chamber or the rear chamber of the piston pump.

[0095] The working medium corresponding to the pipeline in the energy storage pipe gallery 3 operates independently. The working medium flows from the first phase change box 57 and the second phase change box 58 through the phase change box outlet pipe 15 into the energy storage flow channel 53 in the first phase converter 49 and the second phase converter 45 respectively, and exchanges heat with the phase change unit 46. After the heat exchange is completed, the working medium flows back to the first phase change box 57 and the second phase change box 58 through the phase change box inlet pipe 16.

Claims

1. An integrated system of phase change heat storage and heat dispatching for assembled integrated pipe gallery, characterized in that: include: The interface pipe gallery (1) is provided with an interface boss (11) on the top, and is provided with a load side inlet pipe (9), a load side outlet pipe (10), a phase change box outlet pipe (15), and a phase change box inlet pipe (16) inside; one end of the load side inlet pipe (9) and the load side outlet pipe (10) are connected to the interface boss (11); The heat exchange pipe gallery (2) is arranged on one side of the interface pipe gallery (1); a heat exchange unit is arranged inside the heat exchange pipe gallery (2); the heat exchange unit includes a power component, a flow divider, a phase converter, an upper longitudinal heat exchange pipe (421), and a lower longitudinal heat exchange pipe (422); the upper longitudinal heat exchange pipe (421) is fixed on the upper side of the interior of the heat exchange pipe gallery (2), and the lower longitudinal heat exchange pipe (422) is fixed on the lower side of the interior of the heat exchange pipe gallery (2); the power component, the flow divider, the lower longitudinal heat exchange pipe (422), the phase converter, and the upper longitudinal heat exchange pipe (421) are connected in sequence to form a loop; the phase change box outlet pipe (15) and the phase change box inlet pipe (16) are arranged to pass through the heat exchange pipe gallery (2); The energy storage pipe gallery (3) is arranged on a side of the heat exchange pipe gallery (2) away from the interface pipe gallery (1); a phase change box is arranged inside the energy storage pipe gallery (3); the phase change box outlet pipe (15), the phase change box inlet pipe (16), and the phase converter are connected to the phase change box; The power assembly includes a fixed plate (28), a piston pump mounted on the fixed plate (28), and a hydraulic oil tank (26); the piston pump is provided with a front cavity outlet (29), a front cavity inlet (30), a rear cavity outlet (34), and a rear cavity inlet (35); a flow thermometer (24) is installed on both the front cavity outlet (29) and the rear cavity outlet (34); the hydraulic oil tank (26) is connected to the piston pump via a hydraulic oil pipe (27) to provide driving power for the piston pump; The front cavity inlet (30) is connected to a front cavity inlet pipe (32); the front cavity outlet (29) is connected to a front cavity outlet pipe (31); the rear cavity inlet (35) is connected to a rear cavity inlet pipe (36); the rear cavity outlet (34) is connected to a rear cavity outlet pipe (37); solenoid valves (33) are installed on the front cavity inlet pipe (32) and the rear cavity inlet pipe (36); and the ends of the front cavity outlet pipe (31) and the rear cavity outlet pipe (37) are connected to one-way valves (25); The phase converter comprises a heat exchange channel (51), a heat insulation plate (52), an energy storage channel (53), and a phase change unit (46); a plurality of phase change units (46) are configured; the heat exchange channel (51) is fixed to the upper end of the heat insulation plate (52), and the energy storage channel (53) is fixed to the lower end of the heat insulation plate (52); a connecting hole connecting the heat exchange channel (51) and the energy storage channel (53) is provided on the heat insulation plate (52); A mounting hole adapted for the phase change unit (46) is provided, and the lower end of the phase change unit (46) is inserted from the outside of the heat exchange channel (51) through the mounting hole and the connecting hole into the energy storage channel (53); the two ends of the heat exchange channel (51) are respectively connected to the phase change box outlet pipe (15) and the phase change box inlet pipe (16); the two ends of the energy storage channel (53) are respectively connected to the upper longitudinal heat exchange tube (421) and the lower longitudinal heat exchange tube (422); The phase change unit (46) comprises a phase change cylinder (56), a sealing top cover (55) and a tightening wrench (54); the phase change cylinder (56) is plugged into the heat insulation plate (52) between the heat exchange flow channel (51) and the energy storage flow channel (53); the tightening wrench (54) is installed on the sealing top cover (55); the sealing top cover (55) is buckled onto the phase change cylinder (56) and fixed by the tightening wrench (54); The piston pumps are provided with two, including a first piston pump (22) and a second piston pump (23); the flow dividers and phase converters are provided with two corresponding to the two piston pumps, and are correspondingly arranged on the sides of the first piston pump (22) and the second piston pump (23), including a first flow divider (40), a second flow divider (41), a first phase converter (49) and a second phase converter (45); the front cavity outlet pipe (31) and the rear cavity inlet pipe (36) of the first piston pump (22) and the second piston pump (23) are connected to the first flow divider (40) through a first cross-corridor pipe (38), and the front cavity inlet pipe (32) and the rear cavity outlet pipe (37) are connected to the second flow divider (41) through a second cross-corridor pipe (39).

2. The integrated system of phase change heat storage and heat dispatching for assembled integrated pipe gallery according to claim 1, characterized in that: Phase change tube groove support plates (14) for fixing the phase change box outlet pipe (15) and the phase change box inlet pipe (16) are all provided in the interface tube gallery (1), the heat exchange tube gallery (2) and the energy storage tube gallery (3); mounting grooves (13) are all provided inside the interface tube gallery (1), the heat exchange tube gallery (2) and the energy storage tube gallery (3); mounting groove support plates (12) are provided on the upper part of the mounting grooves (13); and the power assembly is provided in the mounting groove (13) of the heat exchange tube gallery (2).

3. The integrated system of phase change heat storage and heat dispatching for prefabricated integrated pipe gallery according to claim 2 is characterized in that: A guide plate (20) is provided on the mounting groove support plate (12) of the heat exchange pipe gallery (2); a guide slope (19) is provided in the mounting groove (13) on one side of the guide plate (20), and a diffusion cavity (21) is provided on the other side; and the power assembly is placed below the guide plate (20).

4. The integrated system of phase change heat storage and heat dispatching for assembled integrated pipe gallery according to claim 1, characterized in that: The upper longitudinal heat exchange tube (421) and the lower longitudinal heat exchange tube (422) are both provided with a pipe elbow (43); the heat exchange tube gallery (2) is provided with a pipe embedding groove (17) connected to the upper longitudinal heat exchange tube (421), the lower longitudinal heat exchange tube (422), and the pipe elbow (43); and the pipe embedding groove (17) is connected to a grouting hole (18).

5. The integrated system of phase change heat storage and heat dispatching for prefabricated integrated pipe gallery according to claim 2 is characterized in that: The interface pipe gallery (1), heat exchange pipe gallery (2), and energy storage pipe gallery (3) are all provided with a top plate (4), a left side plate (5), a bottom plate (6), a right side plate (7), and a partition wall (8); the top plate (4), the left side plate (5), the bottom plate (6), and the right side plate (7) are connected in sequence to form a ring; the upper end of the partition wall (8) is fixedly connected to the top plate (4), and the lower end is fixedly connected to the bottom plate (6); there are two partition walls (8), which are arranged parallel to each other and spaced apart; the installation groove (13) is provided on the bottom plate (6) and is located between the two partition walls (8); the phase change box outlet pipe (15), the phase change box inlet pipe (16), and the phase converter are located on the side of the partition wall (8) away from the installation groove (13).

6. The scheduling method of the integrated system of phase change heat storage and heat scheduling for the assembled integrated pipe gallery according to claim 1, characterized in that: The following steps are involved: Step S1: Setting the solidification temperature range of the phase change unit according to the phase change hysteresis test results of the phase change material in the phase change unit T P,mi and melting temperature range T P,ma The solidification temperature at the current moment is calculated by the following formula T mi and melting temperature T ma ; Step S2: According to the solidification temperature T mi and melting temperature T ma Calculate the attenuation parameters of the phase change unit at the next running time D P (t+ 1) ; Step S3: The temperature of the flow in and out of the phase converter at the current operating time measured by the flow thermometer T D,i and T D,o , the temperature of the working medium flowing into and out of the phase converter T B,i and T B,o , the temperature of the load side inflow and outflow of the phase converter T L,i and T L,o Calculate the heat transfer power of the phase change box separately Q D , buried pipe heat exchange power Q B and load side heat exchange power Q L ; Step S4: The heat exchange power of the phase change box at the current operating time is Q D , the heat exchange rate of the phase change unit in the first phase converter (49) and the second phase converter (45) dU P,1 (t) / dt and dU P,2 (t) / dt , Phase transformer bypass parameters γ(t) Calculate the phase transformer bypass parameters for the next operating moment γ(t+1) ; Step S5: Calculate the heat exchange rate of the phase change unit (46) in the first phase converter (49) and the second phase converter (45) at the next operating moment according to the energy conservation equation. dU P,1 (t+1) / dt and dU P,2 (t+1) / dt ; Step S6: According to the heat exchange rate of the phase change unit (46) dU P,1 (t+1) / dt and dU P,2 (t+1) / dt , attenuation parameters D P,1 (t +1) and D P,2 (t+1) , determine the state of the piston pump at the next operating moment; Step S7: perform loop iterations at different running times according to the above calculation process.

Images