Energy tunnel heat storage and pavement snow melting and deicing system and operation method thereof

Abstract

The invention discloses an energy tunnel heat storage and road surface snow melting and deicing system and an operation method thereof, and relates to the technical field of road surface deicing systems.The energy tunnel heat storage and road surface snow melting and deicing system comprises a heat storage buried pipe loop and a snow melting and deicing buried pipe loop, the heat storage buried pipe loop is used for being buried in a heat storage area stratum, and the heat storage area stratum is located below and / or on the two sides of a tunnel closed frame bottom plate; the snow melting and deicing buried pipe loop is used for being buried under the road surface of a deicing area and used for conducting heat exchange with the road surface of the deicing area. The heat storage buried pipe loop and the snow melting and deicing buried pipe loop are coupled to realize heat exchange; during deicing, the heat storage buried pipe loop is used for absorbing heat of a stratum in a heat storage area and transferring the heat to the snow melting and deicing buried pipe loop; during heat storage, the snow melting and deicing buried pipe loop is used for absorbing heat of the road surface of the deicing area and transferring the heat into the heat storage buried pipe loop, and the heat storage buried pipe loop is used for transferring the heat into the stratum of the heat storage area to be stored. The snow melting and deicing effects can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road deicing systems, in particular to an energy tunnel heat storage and road snow melting and deicing system and a running method thereof. BACKGROUND

[0002] Traditional road snow melting and deicing technology mainly relies on methods such as spreading snow melting agent, mechanical snow removal or electric heating, which has problems such as environmental pollution, large energy consumption and low efficiency. In recent years, road snow melting systems based on geothermal exchange have gradually developed, but the snow melting and deicing effect is not good in actual application. Therefore, there is an urgent need for a new scheme to solve the above problems. SUMMARY

[0003] The present application provides an energy tunnel heat storage and road snow melting and deicing system and a running method thereof to solve the problems of the prior art and improve the snow melting and deicing effect.

[0004] To achieve the above-mentioned purpose, the present application provides the following scheme:

[0005] The present application provides an energy tunnel heat storage and road snow melting and deicing system, comprising:

[0006] The heat storage buried pipe circuit is used for being buried in the heat storage area stratum and exchanging heat with the heat storage area stratum; the heat storage area stratum is located below and / or on both sides of the tunnel closed frame;

[0007] The snow melting and deicing buried pipe circuit is used for being buried under the deicing area road surface and exchanging heat with the deicing area road surface; the heat storage buried pipe circuit and the snow melting and deicing buried pipe circuit are coupled to realize heat exchange;

[0008] During deicing, the heat storage buried pipe circuit is used for absorbing heat of the heat storage area stratum and transferring the heat to the snow melting and deicing buried pipe circuit, and the snow melting and deicing buried pipe circuit is used for transferring heat to the deicing area road surface to melt ice and / or snow;

[0009] During heat storage, when the deicing area road surface is not covered with snow or ice and the road surface temperature is greater than a set temperature threshold, the snow melting and deicing buried pipe circuit is used for absorbing heat of the deicing area road surface and transferring the heat to the heat storage buried pipe circuit, and the heat storage buried pipe circuit is used for transferring heat to the heat storage area stratum for storage.

[0010] Preferably, at least part of the heat storage buried pipe circuit is arranged in the foundation structure below the tunnel closed frame and / or the protection structure on both sides of the tunnel closed frame, the foundation structure is one or more of anti-pulling piles and pressure bearing piles, and the protection structure is one or more of anchor rods, underground continuous walls and support piles.

[0011] Preferably, the heat storage buried pipe circuit comprises a plurality of first pipe groups, a first total water inlet pipe and a first total water return pipe, the first pipe group is a reciprocating and zigzag pipe, one end of the first pipe group is a first water inlet, and the other end is a first water return, each first water inlet is in communication with the first total water inlet pipe, and each first water return is in communication with the first total water return pipe, and each first pipe group forms a heat storage circuit with the first total water inlet pipe and the first total water return pipe, and the length of each heat storage circuit is consistent.

[0012] The snow melting and deicing buried pipe circuit comprises a plurality of second pipe groups, a second total water inlet pipe and a second total water return pipe, the second pipe group is a reciprocating and zigzag pipe, one end of the second pipe group is a second water inlet, and the other end is a second water return, each second water inlet is in communication with the second total water inlet pipe, and each second water return is in communication with the second total water return pipe, and each second pipe group forms a deicing circuit with the second total water inlet pipe and the second total water return pipe, and the length of each deicing circuit is consistent.

[0013] Preferably, during deicing, the heat storage buried pipe circuit and the snow melting and deicing buried pipe circuit are coupled through the ground source heat pump unit; during heat storage, the heat storage buried pipe circuit and the snow melting and deicing buried pipe circuit can be coupled through the ground source heat pump unit or directly connected to achieve coupling; a reflective insulation layer is laid on the heat storage buried pipe circuit.

[0014] Preferably, it further comprises an energy storage water tank, the inlet and outlet of the snow melting and deicing buried pipe circuit are in communication with the energy storage water tank to form a circuit, and the energy storage water tank is coupled with the heat storage buried pipe circuit through the ground source heat pump unit; when the deicing area road surface is in a snow-covered or iced state, the ground source heat pump unit works intermittently.

[0015] Preferably, it further comprises a photovoltaic system, an air source heat pump unit and an electric heater, the electric heater is arranged inside the energy storage water tank, the electric heater is electrically connected with the photovoltaic system, and the electric heater is also used for connecting to a municipal power supply system; the air source heat pump unit is coupled with the energy storage water tank to heat the medium in the energy storage water tank.

[0016] Preferably, a plurality of first temperature sensors are arranged at different positions in the heat storage area stratum; a plurality of second temperature sensors are arranged at different positions below the deicing area road surface.

[0017] Preferably, it further comprises a deicing area road surface structure, the deicing area road surface is formed on the upper surface of the deicing area road surface structure, and the deicing area road surface structure comprises, from top to bottom, an asphalt mastic mixture layer, a medium-grained asphalt modified concrete layer, a coarse-grained asphalt concrete layer, a first concrete layer and a cement stabilized graded gravel layer; the snow melting and deicing buried pipe circuit is embedded in the first concrete layer.

[0018] Further comprising a heat storage loop support layer, which is arranged in the heat storage area stratum, and comprises a second concrete layer on the upper layer and a fine sand layer on the lower layer, and the heat storage buried pipe loop is embedded in the second concrete layer.

[0019] Preferably, further comprising a plate heat exchanger, which is used to couple the snow-melting and de-icing buried pipe loop and the energy storage water tank; the plate heat exchanger and the snow-melting and de-icing buried pipe loop are communicated through an intermediate pipeline above the ground and form a loop, and a vacuum degassing machine is arranged on the intermediate pipeline;

[0020] The de-icing area pavement is a spiral pavement.

[0021] The application further provides a running method of the energy tunnel heat storage and pavement snow-melting and de-icing system, comprising:

[0022] The heat storage method comprises:

[0023] The first heat storage method is to directly communicate and couple the snow-melting and de-icing buried pipe loop and the heat storage buried pipe loop, and control the circulation of the heat transfer medium in the circulation loop formed by the snow-melting and de-icing buried pipe loop and the heat storage buried pipe loop to transfer external heat to the heat storage area stratum;

[0024] The second heat storage method is to couple the snow-melting and de-icing buried pipe loop and the heat storage buried pipe loop through a ground source heat pump unit;

[0025] The control system determines to adopt the first heat storage method or the second heat storage method by monitoring the temperature change of the heat storage area stratum;

[0026] During heat storage, the photovoltaic system always supplies power to the electric heater to convert heat;

[0027] The ice-melting method comprises:

[0028] The first ice-melting method is to couple the snow-melting and de-icing buried pipe loop and the heat storage buried pipe loop through a ground source heat pump unit; and the photovoltaic system supplies power to the electric heater to electrically heat the heat transfer medium in the energy storage water tank;

[0029] The second ice-melting method is to couple the snow-melting and de-icing buried pipe loop and the heat storage buried pipe loop through a ground source heat pump unit; the photovoltaic system supplies power to the electric heater to electrically heat the heat transfer medium in the energy storage water tank; and an air source heat pump unit is coupled with the energy storage water tank to heat the heat transfer medium in the energy storage water tank;

[0030] The third grade ice melting method: the snow melting and deicing buried pipe circuit and the heat storage buried pipe circuit are coupled through the ground source heat pump unit; the municipal power supply system supplies power to the electric heater to realize electric heating of the heat transfer medium in the energy storage water tank; the air source heat pump unit and the energy storage water tank are coupled to heat the heat transfer medium in the energy storage water tank;

[0031] The control system determines to adopt the first grade ice melting method, the second grade ice melting method or the third grade ice melting method by monitoring the temperature change of the deicing area road surface;

[0032] The control system calculates the road surface temperature through the temperature sensor monitoring value buried under the deicing area road surface; the calculation formula is as follows:

[0033]

[0034] Wherein: t is the heat conduction time (s), x is the distance of the road plane normal direction from the buried pipe plane (m), T0 is the initial temperature of the road (℃), T(x, t) is the temperature at the distance x from the buried pipe plane after experiencing the time t (℃), q is the constant heat flux density applied on the road buried pipe plane (W / m 2 ), k is the thermal conductivity (W / m·K), alpha is the thermal diffusivity (m 2 / s), and erfc is the complementary error function.

[0035] The present application has the following technical effects relative to the prior art:

[0036] The present application sets the heat storage buried pipe circuit in the stratum below and / or on both sides of the tunnel closed frame bottom plate, the tunnel closed frame hinders the geothermal heat in the lower stratum from transferring to the outside, reduces the heat loss, and further makes the heat storage buried pipe circuit absorb more geothermal energy to transfer to the deicing area road surface for melting in the deicing stage, and further improves the snow melting and deicing effect.

[0037] Further, the reflection heat preservation layer is laid to further hinder the geothermal heat in the lower stratum from transferring to the outside, and reduce the heat loss. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0039] Figure 1 The structural diagram of the energy tunnel heat storage and road surface snow melting and deicing system provided by the embodiments of the present application;

[0040] Figure 2 is a cross-sectional view of the deicing area pavement structure;

[0041] Figure 3 is a cross-sectional view of the heat storage circuit support layer;

[0042] Figure 4 is a layout diagram of the circulating pump, ground source heat pump unit, water replenishment and pressure setting unit, filter, vacuum degassing machine, energy storage tank, plate heat exchanger, photovoltaic system, and air source heat pump unit;

[0043] Figure 5 is a layout diagram of the foundation structure and lateral protection structure under the tunnel closed frame;

[0044] Figure 6 is a layout diagram of the foundation structure and lateral protection structure under the tunnel closed frame; Figure 5 is an enlarged view of the structure at A in the middle;

[0045] Figure 7 is a structural diagram of the first heat exchange pipe laid on the underground continuous wall;

[0046] Figure 8 is a structural diagram of the first heat exchange pipe laid on the three piles (foundation piles or support piles) in series;

[0047] Figure 9 is a structural diagram of the first heat exchange pipe laid on a single foundation pile (uplift pile or pressure pile);

[0048] Figure 10 is a structural diagram of the first heat exchange pipe laid on another type of foundation pile (uplift pile or pressure pile);

[0049] Figure 11 is a structural diagram of the first heat exchange pipe laid on a single support pile;

[0050] Figure 12 is a top view of the first heat exchange pipe laid on a single foundation pile (uplift pile or pressure pile);

[0051] Figure 13 is a top view of the first heat exchange pipe laid on a single support pile;

[0052] Figure 14 is a cross-sectional view of the steel casing, heat exchange pipe insulation layer, and first heat exchange pipe;

[0053] In the figure: 1-heat storage buried pipe circuit; 11-first heat exchange pipe; 12-steel sleeve; 13-heat exchange pipe insulation layer; 14-foam adhesive layer; 2-melting snow and deicing buried pipe circuit; 3-energy storage water tank; 31-electric heater; 32-battery; 33-photovoltaic system; 34-air source heat pump unit; 4-geothermal heat pump unit; 5-circulating pump; 61-asphalt mastic mixture layer; 62-medium-grained asphalt modified concrete layer; 63-coarse-grained asphalt concrete layer; 64-first concrete layer; 65-cement stabilized graded gravel layer; 71-second concrete layer; 72-underlying fine sand layer; 81-vacuum degassing machine; 82-filter; 83-water replenishment constant pressure unit; 84-antifreeze liquid tank; 85-plate heat exchanger; 86-water replenishment pipe; 9-foundation pile; 91-stirrup; 92-heat exchange pipe fixing rib; 93-conical head; 94-anchor rod; 95-supporting pile; 96-underground continuous wall; 97-main rib; 100-tunnel closed frame; 101-melting snow and deicing buried pipe circuit end; 102-heat storage buried pipe circuit end; 103-municipal power supply system end; 110-temperature sensor; 111-temperature sensor signal transmission line; 112-strain temperature sensor signal transmission line; 113-strain temperature sensor. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0055] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0056] The embodiments of the present application will be described below with reference to Figures 1 to 14 .

[0057] Embodiment one

[0058] The present application provides an energy tunnel heat storage and pavement snow melting and deicing system, comprising: as Figure 1As shown, the heat storage buried pipe circuit 1 and the snow-melting buried pipe circuit 2 are both used to circulate the heat transfer medium and exchange heat with the stratum or the road surface, the heat storage buried pipe circuit 1 is used to be buried in the heat storage area stratum and exchange heat with the heat storage area stratum, the heat storage area stratum is located below and / or on both sides of the tunnel closed frame 100, the snow-melting buried pipe circuit 2 is used to be buried under the deicing area road surface and exchange heat with the deicing area road surface, and the heat storage buried pipe circuit 1 and the snow-melting buried pipe circuit 2 are coupled to exchange heat.

[0059] During deicing, the heat storage buried pipe circuit 1 is used to absorb heat from the heat storage area stratum and transfer the heat to the snow-melting buried pipe circuit 2, and the snow-melting buried pipe circuit 2 is used to transfer the heat to the deicing area road surface to melt ice and / or snow. The working process is usually carried out in winter. However, when the road surface is iced or snow-covered due to extreme temperature drop in early spring or late autumn, the above deicing working process can also be run. It can be understood that the above "ice" includes snow and frost.

[0060] During heat storage, when the deicing area road surface is not snow-covered or iced and the road surface temperature is greater than the set temperature threshold, the snow-melting buried pipe circuit 2 is used to absorb heat from the deicing area road surface and transfer the heat to the heat storage buried pipe circuit 1, and the heat storage buried pipe circuit 1 is used to transfer the heat to the heat storage area stratum for storage. The working process is usually carried out in summer. However, it is not limited to summer. It can be understood that the heat storage process can also be started when the road surface temperature is higher than the set temperature threshold in winter. Of course, the heat storage can be carried out in autumn and spring according to actual conditions.

[0061] The heat storage buried pipe circuit 1 is arranged in the stratum below and / or on both sides of the tunnel closed frame 100 in the present application, the tunnel closed frame 100 hinders the heat transfer of the geothermal energy in the stratum below from the ground surface to the outside, reduces the heat loss, and thus the heat storage buried pipe circuit 1 can absorb more geothermal energy to transfer to the deicing area road surface for melting in the deicing stage, thereby improving the snow-melting and deicing effect.

[0062] It should be noted that components for driving the flow of the heat transfer medium, such as inflow pumps and circulating pumps, need to be arranged in the embodiments of the present application.

[0063] In addition, the heat storage buried pipe circuit 1 is constructed in the stratum below and / or on both sides of the tunnel before the tunnel is established in the specific implementation of the present application.

[0064] In some embodiments, the at least partial heat storage buried pipe circuit 1 is arranged in the foundation structure below the tunnel closed frame 100 and / or the protective structure on both sides, the foundation structure is a foundation pile 9, the foundation pile 9 is one or more of a bearing pile and an anti-pulling pile; the protective structure is one or more of an anchor rod 94, an underground continuous wall 96 and a support pile 95. It can be understood that the embodiment shows that the heat storage buried pipe circuit 1 can be directly arranged in the stratum or indirectly arranged in the stratum through the protective structure.

[0065] It should be noted that the support pile 95 and the anchor rod 94 are a combination and exist at the same time, and the underground continuous wall 96 exists alone. When the combination of the support pile 95 and the anchor rod 94 is selected for support, the underground continuous wall 96 does not need to be made, and when the underground continuous wall 96 is selected for support, the support pile 95 and the anchor rod 94 do not need to be made.

[0066] The embodiment is beneficial to obtain geothermal energy of deeper stratum, and further improve the snow melting effect. Specifically, considering that the ground temperature below 10-15 m is basically constant, the heat storage buried pipe circuit 1 is usually buried in the stratum below 10-15 m, so as to ensure the stability of extracting the ground temperature. For example, considering that the foundation pile 9 is usually buried below 10 m, and many foundation piles 9 are buried more than 15 m, which provides the possibility of obtaining geothermal energy of deeper stratum. Therefore, the embodiment fully utilizes the feature of large embedding depth of the foundation pile 9 to embed the heat storage buried pipe circuit 1 in the foundation pile 9, so as to obtain more stable geothermal energy, and finally achieve the purpose of improving the ice and snow melting effect.

[0067] In addition, the heat storage buried pipe circuit 1 can be arranged on the anchor rod 94, the underground continuous wall 96 and the support pile 95.

[0068] In some examples, the first heat exchange pipe 11 constituting the heat storage buried pipe circuit 1 is arranged on the reinforcement cage of the foundation pile 9, a heat exchange pipe fixing rib 92 with a diameter of 12 mm is arranged, the heat exchange pipe fixing rib 92 is installed along the vertical direction of the foundation pile and has the same length as the pile, so as to fix the first heat exchange pipe 11 and ensure the safety of the pile structure. In addition, the bottom of the first heat exchange pipe 11 is provided with a tapered head 93. The tapered head 93 is arranged to protect the heat exchange pipe when the hole is first formed and then the concrete is poured and the reinforcement cage is inserted.

[0069] In some examples, the heat exchange pipe fixing rib 92 for fixing the first heat exchange pipe 11 is installed on the foundation pile 9 through the stirrup 91.

[0070] The first heat exchange pipe 11 on each foundation pile 9 can be individually arranged as a pipe group (as shown in FIG. 6) and arranged in parallel with the pipe group on other foundation piles 9, or the first heat exchange pipes 11 on multiple foundation piles 9 can be connected in series to form a pipe group (as shown in FIG. 7). Figures 9-10 Figure 8 The first heat exchange pipe 11 on each foundation pile 9 can be individually arranged as a pipe group (as shown in FIG. 6) and arranged in parallel with the pipe group on other foundation piles 9, or the first heat exchange pipes 11 on multiple foundation piles 9 can be connected in series to form a pipe group (as shown in FIG. 7).​

[0071] In some examples, since the support pile 95 only functions in the tunnel construction stage, in order to reduce costs, the first heat exchange pipe 11 on the support pile 95 is directly bundled on the main reinforcement 97, and no additional fixing reinforcement is required, but the foundation pile 9 must be additionally provided with the heat exchange pipe fixing reinforcement 92 to ensure that the structural strength of the foundation pile 9 is not affected by the first heat exchange pipe 11.

[0072] In some examples, a strain temperature sensor 113 is arranged on the foundation pile 9, and the data detected by the strain temperature sensor 113 is transmitted to a control system, the control system calculates the internal force of the pile structure to monitor the influence of the arrangement of the heat exchange pipe and the temperature cycle on the foundation pile 9, and when the internal force exceeds a safety threshold, corresponding remedial measures need to be taken to avoid damage to the pile structure and affect the safety of the tunnel structure.

[0073] And only temperature sensors 110 are arranged on the support pile 95, the underground continuous wall 96, and the anchor rod 94.

[0074] In some examples, the heat storage buried pipe circuit 1 includes a plurality of first pipe groups, a first total water inlet pipe, and a first total water return pipe. The first pipe groups are reciprocating and zigzag arranged pipes. One end of each first pipe group is a first water inlet, and the other end is a first water return. Each first water inlet is in communication with the first total water inlet pipe, and each first water return is in communication with the first total water return pipe. Each first pipe group and the first total water inlet pipe and the first total water return pipe form a heat storage circuit. The length of each heat storage circuit is consistent.

[0075] The snow melting and ice removing buried pipe circuit 2 includes a plurality of second pipe groups, a second total water inlet pipe, and a second total water return pipe. The second pipe groups are reciprocating and zigzag arranged pipes. One end of each second pipe group is a second water inlet, and the other end is a second water return. Each second water inlet is in communication with the second total water inlet pipe, and each second water return is in communication with the second total water return pipe. Each second pipe group and the second total water inlet pipe and the second total water return pipe form an ice removing circuit. The length of each ice removing circuit is consistent.

[0076] This embodiment achieves the purpose of equal length of each heat storage circuit and the purpose of equal length of each ice removing circuit, thereby ensuring that the pipe pressure and heat transfer medium flow rate in all heat storage circuits are equal and that the pipe pressure and heat transfer medium flow rate in all ice removing circuits are equal, thereby improving the heat storage effect and the ice removing effect.

[0077] In some examples, a reflective insulation layer is laid on the heat storage buried pipe circuit 1 or the heat storage area stratum.

[0078] This embodiment improves the insulation effect of the heat storage area stratum, thereby improving the ice removing effect.

[0079] In some embodiments, during deicing, the heat storage borehole loop 1 and the snow-melting and deicing borehole loop 2 are coupled through the ground source heat pump unit 4; during heat storage, the heat storage borehole loop 1 and the snow-melting and deicing borehole loop 2 are directly connected to be coupled, and can also be coupled through the ground source heat pump unit 4.

[0080] In this embodiment, during deicing, the heat transfer medium in the heat storage borehole loop 1 and the snow-melting and deicing borehole loop 2 respectively circulates in two independent loops, thereby avoiding mutual solubility of the two loop mediums and affecting the properties, and also facilitating independent control of the flow of the heat transfer medium in each loop according to the actual temperature of the deicing area pavement and the heat storage area stratum, thereby realizing efficient heat exchange of both sides of the loop.

[0081] In some embodiments, the embodiment of the present application further comprises an energy storage water tank 3, the inlet and outlet of the snow-melting and deicing borehole loop 2 and the energy storage water tank 3 are connected to form a loop, and the energy storage water tank 3 is coupled with the heat storage borehole loop 1 through the ground source heat pump unit 4; when the deicing area pavement is in a snow-covered or ice-covered state, the ground source heat pump unit 4 works intermittently.

[0082] This embodiment realizes intermittent operation of the ground source heat pump unit 4, ensuring higher energy efficiency ratio, but the heat transfer medium in the snow-melting and deicing borehole loop 2 is always in heat exchange with the energy storage water tank, thereby realizing the effect of significant energy saving. In order to facilitate understanding, the following is explained. Since the geothermal heat of the heat storage area stratum continuously decreases, it takes a certain time for the geothermal heat of other area stratum to be transferred to the heat storage area stratum. If the ground source heat pump unit 4 continuously works, when the temperature of the heat storage area stratum decreases to a certain extent, the temperature difference between the heat transfer medium in the heat storage borehole loop 1 and the heat storage area stratum becomes small, and the heat exchange efficiency becomes low, which reduces the heat exchange efficiency. Moreover, since the ground source heat pump unit 4 continuously works, it increases energy consumption. If the scheme in this embodiment is adopted, the ground source heat pump unit 4 works intermittently, which gives the heat storage area stratum a certain time to recover the temperature, thereby keeping the temperature difference between the heat transfer medium in the heat storage borehole loop 1 and the heat storage area stratum large, and thereby ensuring the heat exchange effect. Moreover, due to the existence of the energy storage water tank 3, the heat transfer medium in the snow-melting and deicing borehole loop 2 is always in heat exchange with the energy storage water tank, thereby realizing the purpose of energy saving without reducing the deicing effect.

[0083] In view of the fact that the energy required for ice and snow melting in extreme weather exceeds the energy that the system designed in the above-mentioned embodiments can provide, the above-mentioned embodiments cannot meet the requirement of fully melting the ice and snow on the pavement. Based on this, in some embodiments, a photovoltaic system 33, an air source heat pump unit 34 and an electric heater 31 are further included. The electric heater 31 is arranged inside the energy storage water tank, the electric heater 31 and the photovoltaic system 33 are electrically connected, and the electric heater 31 is further used for connecting to the municipal power supply system; the air source heat pump unit 34 is coupled with the energy storage water tank to heat the medium in the energy storage water tank.

[0084] The embodiment can realize electric heating and / or air energy heating of the heat transfer medium in the energy storage water tank to compensate for the defect that the road surface snow cannot be fully melted due to insufficient geothermal energy, and on the other hand, the embodiment is also to improve the deicing effect.

[0085] In some embodiments, a plurality of first temperature sensors are arranged at different positions in the heat storage area stratum, and a plurality of second temperature sensors are arranged at different positions under the deicing area road surface.

[0086] The embodiment detects the heat in the deicing area road surface and the heat storage area stratum by arranging temperature sensors, thereby providing some data information for the automatic operation of the system, for example, when the second temperature sensor detects that the road surface temperature is lower than the set threshold value and manual checking or through image sensors or there is ice and snow on the road surface, the system is automatically started to work for deicing. In addition, the flow of the heat transfer medium in the circuit can also be automatically regulated according to the temperature information provided by the temperature sensor.

[0087] In some embodiments, the embodiment of the present application further includes a deicing area road surface structure, and the deicing area road surface is formed on the upper surface of the deicing area road surface structure. The deicing area road surface structure includes, from top to bottom, an asphalt mastic mixture layer 61, a medium-grained asphalt modified concrete layer 62, a coarse-grained asphalt concrete layer 63, a first concrete layer 64, and a cement stabilized graded gravel layer 65. The snow melting and deicing buried pipe circuit 2 is embedded in the first concrete layer.

[0088] The embodiment of the present application further includes a heat storage circuit support layer, which is arranged in the heat storage area stratum. The heat storage circuit support layer includes a second concrete layer 71 at the upper layer and a fine sand layer 72 at the lower layer. The heat storage buried pipe circuit 1 is embedded in the second concrete layer 71.

[0089] The embodiment provides a way to protect the heat storage buried pipe circuit 1 and the snow melting and deicing buried pipe circuit 2.

[0090] In some embodiments, the embodiment of the present application further includes a plate heat exchanger 85, which is used to couple the snow melting and deicing buried pipe circuit 2 and the energy storage water tank 3. The plate heat exchanger 85 and the snow melting and deicing buried pipe circuit 2 are connected through an intermediate pipe above the ground and form a circuit. A vacuum degassing machine 81 is arranged on the intermediate pipe.

[0091] The embodiment realizes the purpose of coupling heat but not medium between the snow-melting and deicing buried pipe loop 2 and the energy storage water tank 3 through the plate heat exchanger 85, which makes it possible to use different heat transfer mediums in the snow-melting and deicing buried pipe loop 2 and the energy storage water tank 3 respectively. For example, in some examples, antifreeze is added to the heat transfer medium in the snow-melting and deicing buried pipe loop 2 or the antifreeze is directly used as the heat transfer medium to avoid the defect that the heat transfer medium freezes due to excessively low external temperature, while the energy storage water tank 3 is usually arranged in an indoor environment such as a machine room, and the indoor environment temperature is high, so the heat transfer medium in the energy storage water tank 3 can use water.

[0092] In some embodiments, the plate heat exchanger 85, the ground source heat pump unit 4 and the like are arranged in the machine room to facilitate centralized maintenance, which can be specifically seen from Figure 4 In addition, the filter 82, the water supplement constant pressure unit 83, the antifreeze tank 84 and the water supplement pipe 86 are further arranged, the water supplement pipe 86 is connected to a water source, the water supplement pipe 86 and one of the water supplement constant pressure units 83 are used to supplement water to the heat storage buried pipe loop 1 and the energy storage water tank 3 to keep the pressure in the heat storage buried pipe loop 1 and the energy storage water tank 3 constant, and the water is the heat transfer medium in the heat storage buried pipe loop 1 and the energy storage water tank 3, and the antifreeze tank 84 and the other water supplement constant pressure unit 83 are used to supplement antifreeze to the snow-melting and deicing buried pipe loop 2 to keep the pressure in the snow-melting and deicing buried pipe loop 2 constant.

[0093] In some embodiments, the heat exchange pipes used in the heat storage buried pipe loop 1 and the snow-melting and deicing buried pipe loop 2 are all PE pipes with an outer diameter, and the outer diameter is preferably 32 mm and the wall thickness is 3 mm, and the bearing pressure is 1.6 MPa. The spacing between each reciprocating and zigzag heat exchange pipe is about 0.5 m to 1 m (which can be appropriately adjusted).

[0094] Embodiment two

[0095] The embodiment of the present application provides an operation method of the energy tunnel heat storage and road surface snow-melting and deicing system in embodiment one, which comprises the following steps:

[0096] The heat storage method comprises the following steps:

[0097] The first heat storage method comprises the following steps: directly connecting and coupling the snow-melting and deicing buried pipe loop 2 and the heat storage buried pipe loop 1, and controlling the heat transfer medium to circulate in the circulation loop formed by the snow-melting and deicing buried pipe loop 2 and the heat storage buried pipe loop 1 to make the external heat transfer to the heat storage area stratum.

[0098] The second heat storage method comprises the following steps: coupling the snow-melting and deicing buried pipe loop 2 and the heat storage buried pipe loop 1 through the ground source heat pump unit 4.

[0099] The control system determines whether to adopt the primary heat storage method or the secondary heat storage method by monitoring the temperature changes of the stratum in the heat storage area. It can be understood that since the heat storage efficiency of the secondary heat storage method is necessarily higher than that of the primary heat storage method, the primary heat storage method is first used for heat storage. When it is monitored that the geothermal temperature in the stratum in the heat storage area rises slowly or does not rise at all, the secondary heat storage method is switched.

[0100] During heat storage, the photovoltaic system 33 always supplies power to the electric heater 31 for heat conversion.

[0101] Ice melting method:

[0102] The first-level ice melting method is as follows: the snow melting and ice removal buried pipe loop 2 and the heat storage buried pipe loop 1 are coupled through the ground source heat pump unit 4; the photovoltaic system 33 supplies power to the electric heater 31 to electrically heat the heat transfer medium in the energy storage tank 3; wherein, the electric energy generated by the photovoltaic system 33 needs to be first transmitted to the battery 32 for storage, and when the electric heater 31 needs electricity, the battery 32 directly provides current to the electric heater 31.

[0103] Secondary ice melting method: the snow melting and ice removal buried pipe loop 2 and the heat storage buried pipe loop 1 are coupled through the ground source heat pump unit 4; the photovoltaic system 33 supplies power to the electric heater 31 to electrically heat the heat transfer medium in the energy storage water tank 3; the air source heat pump unit 34 and the energy storage water tank 3 are coupled to heat the heat transfer medium in the energy storage water tank 3.

[0104] Three-stage ice melting method: the snow melting and ice removal buried pipe loop 2 and the heat storage buried pipe loop 1 are coupled through the ground source heat pump unit 4; the municipal power supply system supplies power to the electric heater 31 to electrically heat the heat transfer medium in the energy storage water tank 3; the air source heat pump unit 34 and the energy storage water tank 3 are coupled to heat the heat transfer medium in the energy storage water tank 3.

[0105] The control system determines whether to use the first-level ice melting method, the second-level ice melting method or the third-level ice melting method by monitoring the temperature changes of the road surface in the deicing area.

[0106] The control system calculates the road surface temperature through the monitoring value of the temperature sensor buried under the road surface in the deicing area; the calculation formula is as follows:

[0107]

[0108] Where: t is the heat conduction time (s), x is the distance from the road plane to the buried pipe plane in the normal direction (m), T0 is the initial road temperature (℃), T(x,t) is the temperature at a distance x from the buried pipe plane after time t (℃), q is the constant heat flux applied to the buried pipe plane (W / m 2 ), k is the thermal conductivity (W / m·K), α is the thermal diffusivity m2 / s, erfc is the complementary error function.

[0109] It is understandable that the higher the level of the above-mentioned ice melting method, the better the ice melting effect, but the more energy it consumes. Therefore, in the initial stage, the first-level ice melting method is preferred. When it is monitored that the ice melting effect is poor or extreme weather is encountered, the second-level ice melting method and the third-level ice melting method can be selected.

[0110] This embodiment has all the advantages of the first embodiment, which will not be described in detail here.

[0111] Specifically, for ease of understanding, corresponding Figure 1 Explain the above implementation method:

[0112] During seasons with higher road surface temperatures, a heat storage process is required, transferring the heat from the ground to the ground to generate geothermal heat. The first step is to close valves V1, V2, and V5, open valves V3 and V4, disconnect switch K1, and close switch K2. Heat from the road surface and heat converted by the solar photovoltaic system are stored underground in separate time periods. Temperature sensors monitor the ground temperature. If the ground temperature cannot return to its initial value, valves V1, V2, and V4 can be opened, valves V3 and V5 can be closed, and the ground-source heat pump unit can be started to store heat from the road surface underground. During this process, switch K1 can still be disconnected and switch K2 closed to store heat converted by the solar photovoltaic system underground. When there is sufficient solar energy, the photovoltaic system can continue the heat storage process.

[0113] During winter snowfall, de-icing is required. The first step is to close valves V3 and V5, open valves V1, V2, and V4, open switch K1, and close switch K2. The control system activates the ground-source heat pump and solar photovoltaic system to melt snow and de-ice the road surface. In extreme snowfall, if the heat exchange power of the primary circuit of the energy tunnel is insufficient, V5 is opened to control the air-source heat pump to transfer heat to the energy storage tank to meet the road snow melting and de-icing load. If this still cannot meet the snow melting and de-icing load, close switch K1 and open switch K2. Connecting the mains power supply allows the heater to operate and replenish some of the heat energy in the energy storage tank to ensure efficient road snow melting and de-icing.

[0114] In some instances, the road surface snow melting and de-icing temperature should be maintained at 3-5°C.

[0115] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An energy tunnel heat storage and road snow melting and de-icing system, characterized by: include: A heat storage buried pipe loop is used to be buried in the ground of the heat storage area and to exchange heat with the ground of the heat storage area; the ground of the heat storage area is located below and / or on both sides of the tunnel closing frame; The snow melting and deicing buried pipe circuit is used to be buried under the road surface in the deicing area and to exchange heat with the road surface in the deicing area; the heat storage buried pipe circuit and the snow melting and deicing buried pipe circuit are coupled to achieve heat exchange; During deicing, the heat storage buried pipe loop is used to absorb heat from the ground in the heat storage area and transfer the heat to the snow melting and deicing buried pipe loop, and the snow melting and deicing buried pipe loop is used to transfer the heat to the road surface in the deicing area to melt ice and / or snow; During heat storage, when the road surface in the deicing area is not covered with snow or ice and the road surface temperature is greater than the set temperature threshold, the snow melting and deicing buried pipe circuit is used to absorb the heat of the road surface in the deicing area and transfer the heat to the heat storage buried pipe circuit, and the heat storage buried pipe circuit is used to transfer the heat to the stratum in the heat storage area for storage.

2. The energy tunnel heat storage and road snow melting and de-icing system according to claim 1 is characterized by: At least part of the heat storage buried pipe loop is arranged in the foundation structure below the tunnel closed frame and / or the protective structure on both sides. The foundation structure is one or more of pull-out piles and pressure-bearing piles, and the protective structure is one or more of anchor rods, underground continuous walls and support piles.

3. The energy tunnel heat storage and road snow melting and de-icing system according to claim 1 is characterized by: The heat storage buried pipe loop includes a plurality of first pipe groups, a first main water inlet pipe, and a first main water return pipe. The first pipe group is a pipe arranged in a reciprocating zigzag pattern. One end of the first pipe group is a first water inlet, and the other end is a first water return. Each of the first water inlets is connected to the first main water inlet pipe, and each of the first water return pipes is connected to the first main water return pipe. Each of the first pipe groups, the first main water inlet pipe, and the first main water return pipe respectively form a heat storage loop. The length of each of the heat storage loops is the same. The buried pipe circuit for melting snow and removing ice includes multiple second pipe groups, a second main water inlet pipe and a second main return pipe. The second pipe group is a pipe arranged in a reciprocating and zigzag manner. One end of the second pipe group is a second water inlet, and the other end is a second water return pipe. Each second water inlet is connected to the second main water inlet pipe, and each second water return pipe is connected to the second main return pipe. Each second pipe group forms a deicing circuit with the second main water inlet pipe and the second main return pipe respectively, and the length of each deicing circuit is the same.

4. The energy tunnel heat storage and road snow melting and de-icing system according to claim 1 is characterized by: During de-icing, the heat storage buried pipe loop and the snow melting and de-icing buried pipe loop are coupled through a ground source heat pump unit; during heat storage, the heat storage buried pipe loop and the snow melting and de-icing buried pipe loop can be coupled through a ground source heat pump unit, or can be directly connected to achieve coupling; a reflective insulation layer is laid above the heat storage buried pipe loop.

5. The energy tunnel heat storage and road snow melting and de-icing system according to claim 4 is characterized by: It also includes an energy storage water tank. The inlet and outlet of the snow melting and de-icing buried pipe circuit are connected to the energy storage water tank to form a circuit. The energy storage water tank is coupled through the ground source heat pump unit and the heat storage buried pipe circuit. When the road surface in the de-icing area is covered with snow or ice, the ground source heat pump unit works intermittently.

6. The energy tunnel heat storage and road snow melting and de-icing system according to claim 5 is characterized by: It also includes a photovoltaic system, an air source heat pump unit and an electric heater. The electric heater is arranged inside the energy storage water tank, the electric heater is electrically connected to the photovoltaic system, and the electric heater is also used to access the municipal power supply system; the air source heat pump unit and the energy storage water tank are coupled to achieve heating of the medium in the energy storage water tank.

7. The energy tunnel heat storage and road snow melting and de-icing system according to claim 6 is characterized by: A plurality of first temperature sensors are arranged at different positions in the stratum of the heat storage area; and a plurality of second temperature sensors are arranged at different positions below the road surface of the deicing area.

8. The energy tunnel heat storage and road snow melting and de-icing system according to claim 5 is characterized by: The deicing area pavement structure is further included. The deicing area pavement is formed on the upper surface of the deicing area pavement structure. The deicing area pavement structure includes, from top to bottom, a mastic asphalt mixture layer, a medium-grained asphalt modified concrete layer, a coarse-grained asphalt concrete layer, a first concrete layer, and a cement-stabilized graded crushed stone layer. The snow-melting and deicing buried pipe loop is embedded in the first concrete layer. It also includes a heat storage circuit support layer, which is arranged in the heat storage area stratum. The heat storage circuit support layer includes an upper second concrete layer and a lower fine sand layer. The heat storage buried pipe loop is embedded in the second concrete layer.

9. The energy tunnel heat storage and road snow melting and de-icing system according to claim 5 is characterized by: It also includes a plate heat exchanger, which is used to couple the snow melting and deicing buried pipe loop and the energy storage water tank; the plate heat exchanger and the snow melting and deicing buried pipe loop are connected through an intermediate pipeline above the ground to form a loop, and a vacuum degasser is provided on the intermediate pipeline; The deicing area road surface is a ramp road surface.

10. An operating method of the energy tunnel heat storage and road snow melting and de-icing system according to any one of claims 6 to 7, characterized in that: include: Heat storage method: The primary heat storage method includes: directly connecting the snow melting and deicing buried pipe circuit and the heat storage buried pipe circuit to achieve coupling, and controlling the heat transfer medium to circulate in the circulation loop formed by the snow melting and deicing buried pipe circuit and the heat storage buried pipe circuit so that external heat is transferred to the stratum in the heat storage area; Secondary heat storage method: the snow melting and de-icing buried pipe loop and the heat storage buried pipe loop are coupled via a ground source heat pump unit; The control system determines whether to adopt the primary heat storage method or the secondary heat storage method by monitoring the temperature change of the stratum in the heat storage area; Wherein, during heat storage, the photovoltaic system always supplies power to the electric heater for heat conversion; Ice melting method: The primary ice melting method is as follows: the snow melting and ice removal buried pipe loop and the heat storage buried pipe loop are coupled via a ground source heat pump unit; the photovoltaic system supplies power to the electric heater to electrically heat the heat transfer medium in the energy storage water tank; A two-stage ice melting method is provided in which the snow melting and ice removal buried pipe loop and the heat storage buried pipe loop are coupled via a ground source heat pump unit; the photovoltaic system supplies power to an electric heater to electrically heat the heat transfer medium in the energy storage water tank; and an air source heat pump unit is coupled to the energy storage water tank to heat the heat transfer medium in the energy storage water tank. Three-stage ice melting method: the snow melting and ice removal buried pipe loop and the heat storage buried pipe loop are coupled via a ground source heat pump unit; the municipal power supply system supplies power to the electric heater to electrically heat the heat transfer medium in the energy storage water tank; the air source heat pump unit is coupled to the energy storage water tank to heat the heat transfer medium in the energy storage water tank; The control system determines whether to adopt the first-level ice melting method, the second-level ice melting method or the third-level ice melting method by monitoring the temperature change of the road surface in the deicing area; The control system calculates the road surface temperature through the monitoring value of the temperature sensor buried under the road surface in the deicing area; the calculation formula is as follows: Where: t is the heat conduction time (s), x is the distance from the road plane to the buried pipe plane in the normal direction (m), T0 is the initial road temperature (℃), T(x,t) is the temperature at a distance x from the buried pipe plane after time t (℃), q is the constant heat flux applied to the buried pipe plane (W / m 2 ), k is the thermal conductivity (W / m·K), α is the thermal diffusivity m 2 / s, erfc is the complementary error function.

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