CN119222655B

CN119222655B - An underground station energy wall water ring heat pump air conditioning system and its operation method

Info

Publication number: CN119222655B
Application number: CN202411458727.4A
Authority: CN
Inventors: 黄琳; 邓保顺; 隋学敏; 马江燕; 何磊; 张渊博; 江晶晶; 安梦莹; 王海洋
Original assignee: China Railway First Survey and Design Institute Group Ltd
Current assignee: China Railway First Survey and Design Institute Group Ltd
Priority date: 2024-10-18
Filing date: 2024-10-18
Publication date: 2025-10-24
Anticipated expiration: 2044-10-18
Also published as: CN119222655A

Abstract

The present invention relates to an underground station energy wall water-loop heat pump air conditioning system and its operating method. The system comprises a water-to-air heat pump unit, an assembled energy wall system, and a thermal storage container. The heat pump unit is located in equipment rooms requiring cooling or heating, the station concourse, and the platform level. The assembled energy wall system is located in the cavity between the structural wall and the free-standing wall of the underground station. The thermal storage container is located in the equipment rooms on both sides of the concourse level. The heat pump unit, assembled energy wall system, and thermal storage container are all connected to a water loop. The present invention combines the assembled energy wall with a water-loop heat pump air conditioning system, utilizing geothermal energy as an external energy source for the water-loop heat pump air conditioning system, replacing the auxiliary cold and heat source equipment in the water loop of a traditional water-loop heat pump. This reduces the equipment footprint and significantly reduces energy consumption.

Description

Underground station energy wall water ring heat pump air conditioning system and operation method thereof

Technical Field

The invention relates to the technical field of building energy conservation, in particular to an underground station energy wall water ring heat pump air conditioning system and an operation method thereof.

Background

Underground buildings such as underground stations are usually provided with part of equipment rooms in an inner area, the heat dissipation capacity of the equipment is large, and a large amount of waste heat is needed for cooling in winter. Meanwhile, the houses in the surrounding area are influenced by outdoor weather parameters and need to supply heat. When the cooling and heating requirements are met in the area, the water loop heat pump system can transfer heat from waste heat in the building, and a good energy-saving effect can be achieved.

Because the residual heat in the inner area is not large, a heating or cooling device is required to be additionally arranged when the traditional water loop heat pump air conditioning system is adopted. However, the underground space resources are tense, the excavation amount is large, and how to develop heating and heat removal equipment with small occupied area and low energy consumption by combining the structural characteristics of the underground building is a key problem for solving the application of the water ring heat pump air conditioning system of the underground station. The existing energy wall comprises an energy underground diaphragm wall and an energy row pile wall, and the buried pipe form of the energy underground diaphragm wall and the energy row pile wall is limited by a reinforcement cage in the diaphragm wall or the structural pile. Therefore, there is a need to propose new measures to overcome the above drawbacks.

Disclosure of Invention

The invention aims to provide an underground station energy wall water ring heat pump air conditioning system and an operation method thereof, so as to solve the problem of application of the underground building application water ring heat pump air conditioning system such as an underground station.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

An underground station energy wall water ring heat pump air conditioning system comprises a heat pump unit, an assembled energy wall system and a heat storage container, wherein the heat pump unit is a water-air heat pump unit;

The heat pump unit is positioned in a room for equipment, a station hall layer and a platform layer which need cooling or heating, the assembled energy wall system is positioned in a cavity between a structural wall and a wall separating wall of an underground station, and the heat storage container is positioned in the room for equipment at two sides of the station hall layer;

the heat pump unit, the assembled energy wall system and the heat storage container are all connected to a water loop.

Further, the air conditioning system further comprises a water treatment device and a water supplementing tank, which are sequentially connected and connected to a water loop between the assembled energy wall system and the heat pump unit.

Further, the air conditioning system further comprises a constant pressure device which is connected to a water loop between the assembled energy wall system and the heat pump unit.

Further, the assembled energy wall system comprises an assembled energy wall, wherein the assembled energy wall is positioned between a structural wall and a wall separating wall of an underground station, is close to the soil side and is closely attached to the structural wall;

An air layer is reserved between the assembled energy wall and the wall separating wall, and the top of the air layer is provided with a vent and leads to the ground.

Further, the assembled energy wall comprises a buried pipe layer, a soaking plate is arranged on the soil side of the buried pipe layer, a heat insulation plate is arranged on the air side of the buried pipe layer, and aluminum foil is attached to the outer side of the heat insulation plate.

In another aspect, a method for operating an underground station energy wall water ring heat pump air conditioning system is provided, the method being implemented when the heat supply of the peripheral area is smaller than the residual heat of the inner area, and comprising:

opening a valve on a pipeline of the heat storage container, and starting the heat storage container to operate;

closing a valve on a pipeline of the assembled energy wall system, and stopping the operation of the assembled energy wall system;

the waste heat of the inner region enters a water loop through a heat pump unit, and after heat is supplied to the peripheral region, the residual heat is stored in a heat storage container;

When the residual heat in the inner area is insufficient to supply heat to the peripheral area, the heat storage container releases the stored heat into the water loop, so that the temperature of the water loop is increased to supply heat to the peripheral area.

In another aspect, a method for operating an underground station energy wall water ring heat pump air conditioning system is provided, the method being implemented when the heat supply quantity of the peripheral zone is equal to the residual heat quantity of the inner zone, and comprising:

Closing a valve on a pipeline of the heat storage container, and stopping the heat storage container;

the water loop is smooth, and the waste heat in the inner area enters the water loop through the heat pump unit to supply heat for the peripheral area.

In another aspect, a method for operating an underground station energy wall water ring heat pump air conditioning system is provided, the method being implemented when the heat supply quantity of the peripheral area is greater than the residual quantity of the inner area, and comprising:

the waste heat quantity of the inner area enters a water loop through a heat pump unit, and after heat is supplied to the peripheral area, the temperature of the water loop is reduced;

Opening a valve on a pipeline of the assembled energy wall system, and starting the operation of the assembled energy wall system;

the assembled energy wall system exchanges heat with surrounding soil, absorbs heat in the soil to raise the temperature of a water loop, and supplies heat to a surrounding area.

In another aspect, a method for operating an underground station energy wall water ring heat pump air conditioning system is provided, the method being implemented when there is no waste heat in an inner zone, and when both the inner zone and a peripheral zone need to supply heat, comprising:

the heat pump units are all in a heating working condition, and the temperature of a water loop is reduced;

In another aspect, a method for operating an underground station energy wall water loop heat pump air conditioning system is provided, the method being implemented when cooling is required in both an inner zone and a peripheral zone, comprising:

the heat pump units are in a refrigerating working condition, and the temperature of a water loop is increased;

The assembled energy wall system exchanges heat with surrounding soil, and discharges heat into the surrounding soil to reduce the temperature of a water loop and cool a surrounding area.

Compared with the prior art, the invention has the following beneficial effects:

The invention provides an underground station energy wall water ring heat pump air conditioning system and an operation method thereof, wherein an assembled energy wall system is adopted as a geothermal energy development member. The underground heat exchange component does not occupy land resources additionally, has little influence on the mechanical properties of the wall body, is not limited in the arrangement form of the buried pipes, can shorten the construction period, reduce the loss and the resource waste of building materials, reduce the environmental pollution, and is convenient to install and use. In addition, the invention designs the water ring heat pump air conditioning system of the energy wall of the underground station on the basis of the assembled energy wall, the geothermal energy is used as the external energy of the water ring heat pump air conditioning system, and the assembled energy wall is adopted to replace a boiler and a cooling tower in the traditional water ring heat pump air conditioning system, so that a good energy saving effect can be achieved, renewable energy sources are fully utilized, environmental friendliness is realized, and the realization of a double-carbon target in the field of underground construction is promoted.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a system configuration diagram of the present invention.

Fig. 2 is a schematic diagram of the operation of the fabricated energy wall system of the present invention. In the figure, a is a summer mode, and B is a winter mode.

Fig. 3 is a schematic view of the installation of the fabricated energy wall system of the present invention.

Fig. 4 is a block diagram of an assembled energy wall of the present invention.

FIG. 5 is a schematic diagram of the system when the heat supplied by the peripheral zone is less than the heat remaining in the inner zone.

FIG. 6 is a schematic diagram of the system when the heat supplied from the peripheral region is equal to the heat remaining in the inner region.

FIG. 7 is a schematic diagram of the system when the heat supplied from the peripheral region is greater than the heat supplied from the inner region.

FIG. 8 is a schematic diagram of the system when both the inner zone and the peripheral zone are providing heat.

FIG. 9 is a schematic diagram of the system when both the inner zone and the peripheral zone are cooled.

The marks in the figure are as follows:

the system comprises a 1-heat pump unit, a 2-assembled energy wall system, a 3-water loop circulating water pump, a 4-heat storage container, a 5-water treatment device, a 6-makeup water tank, a 7-makeup water pump, an 8-constant pressure device and a 9-water loop;

21-soil side, 22-structure wall, 23-assembled energy wall, 24-air layer, 25-wall-separating wall and 26-station side;

231-soaking plate, 232-buried pipe layer, 233-heat-insulating plate and 234-aluminum foil.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "disposed," and the like are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

It should also be noted that although the order of steps is referred to in the method description, in some cases it may be performed in a different order than here, and should not be construed as limiting the order of steps.

In the specific embodiment, the inner area refers to an equipment room without a peripheral protection structure in an underground building such as a subway station and the like, which is provided with waste heat for cooling in winter, and the peripheral area refers to an area such as a hall layer, a platform layer and the like which are adjacent to surrounding soil and are provided with cooling requirements in summer and heating requirements in winter.

Prefabricated building is a direction of development for future buildings. Most of the construction work of the fabricated building is performed in factories, and thus, the construction period of the fabricated building is shorter than that of the conventional cast-in-place building. Meanwhile, the environment pollution and the low carbon emission can be realized, and the development requirement of the green building can be met. The invention provides an underground station energy wall water ring heat pump air conditioning system based on the idea of an assembled building, which achieves the aim of supplying cold or heat for a subway station by exchanging heat with surrounding soil through heat exchange pipes laid on the surface of a structural wall.

As shown in fig. 1, the system comprises a heat pump unit 1, an assembled energy wall system 2, a heat storage container 4 and other auxiliary equipment, including pipelines, valves, water pumps and the like.

The heat pump unit 1 is positioned on a room, a station hall layer and a station platform layer for equipment needing cooling or heating, is a water-air heat pump unit and has a refrigerating mode and a heating mode. The heat exchange medium of the heat exchanger connected with the water loop 9 is water-refrigerant, and the heat exchange medium of the indoor side heat exchanger is refrigerant-air. The heat pump unit 1 is installed in the inner zone and the peripheral zone, and a corresponding number of heat pumps are deployed in each zone according to the actual cooling and heating demands.

The assembled energy wall system 2 is positioned in a cavity between the structural wall 22 and the wall-separating wall 25 of the underground station and comprises an assembled energy wall 23, wherein the assembled energy wall 23 is positioned between the structural wall 22 and the wall-separating wall 25 of the underground station and is close to the soil side 21 and is clung to the structural wall 22. An air layer 24 is reserved between the assembled energy wall 23 and the wall-separating wall 25, and a ventilation opening is arranged at the top of the air layer 24 and is used for exhausting air and leading to the ground. An air inlet is provided at the lower part of the air layer 24, and is installed at the lower part of the wall-separated wall to supply air for upper exhaust. The assembled energy wall 23 comprises a buried pipe layer 232, a soaking plate 231 is arranged on the soil side of the buried pipe layer 232, a heat insulation plate 233 is arranged on the air side of the buried pipe layer 232, and an aluminum foil 234 is attached to the outer side of the heat insulation plate 233.

The structural wall 22 is a conventional reinforced concrete structure having a thickness of 700-1000mm, in accordance with building related requirements. The wall-separating wall is also called a damp-proof wall, and is an additional wall arranged on the inner side of the outer wall of the structure. The main purpose is to eliminate and reduce the influence of the outer wall leakage water on the use and the appearance of the inner space. The wall separating wall is formed by dry hanging materials such as multipurpose enamel steel plates, porcelain aluminum plates, stones and the like in public areas. The cement product plates such as the multipurpose fiber cement plate, the calcium silicate plate and the like in the equipment management area are hung dry and serve as the wall separating wall. The wall separating wall adopts cement fiber board with the thickness of 50-100mm. The cement fiber board has higher strength, low surface water absorption and good sound insulation effect. The inner surface of the cavity side of the wall is sprayed with a low-emissivity coating or is laid with a low-emissivity smooth aluminum tin film, and the surface of the coating is subjected to smoothing treatment so as to reduce the radiation heat exchange quantity between the inner surface of the cavity side of the wall and other surfaces and the convection heat exchange quantity between the radiation heat exchange quantity and air in the cavity, thereby reducing the heat transfer quantity of the energy wall heat exchange tube entering a station through the cavity between the assembled energy wall and the wall.

The air layer 24 corresponds to a waterproof layer of the energy wall system and a second layer of heat insulation material, and has a thickness of 100-250mm, and functions to prevent groundwater from penetrating into the station and reduce the heat transfer amount of the energy wall to the station side. When the energy wall system is arranged in a public area of a station, the thickness of the cavity is 200-250mm. When the energy wall system is arranged in the equipment and the management room of the station, the thickness of the cavity is 100-150mm.

An internal pipeline is arranged in the buried pipe layer 232 of the assembled energy wall 23, and exchanges heat with surrounding soil to extract heat/cold in the soil, and the heat/cold is discharged into a water loop of a water loop heat pump, so that the water temperature in the water loop is increased/reduced, and each heat pump unit distributed in each inner area and each heat pump unit distributed in each outer area exchange heat with the water loop to extract the heat/cold, thereby achieving the purpose of supplying cold or heat for subway stations, and the internal pipeline can adopt two forms of large-pipe-diameter heat exchange pipes or capillary pipes:

example 1:

When the internal pipeline is a large-pipe-diameter heat exchange pipe, the assembled energy wall 23 comprises a soaking plate 231 and a heat insulation plate 233, a buried pipe layer 232 is arranged between the soaking plate 231 and the heat insulation plate 233, and the large-pipe-diameter heat exchange pipe is arranged in the buried pipe layer 232. The buried pipe layer 232 is a cement fiber plate, the surface is provided with a pipe groove, the large-diameter heat exchange tube is embedded in the tube groove.

In this embodiment, the soaking plate 231 is provided to increase uniformity of heat transfer, and has a thickness of 2mm. The soaking plate 231 makes the heat spread to the surrounding soil more evenly, so that the heat exchange capacity of the heat exchange tube is stronger. Copper plate, aluminum alloy and stainless steel can be used as the vapor chamber material. Copper has good ductility and stronger heat conduction capacity, so the copper plate is preferably used as the vapor chamber, and the heat conduction performance is good.

Example 2:

When the internal pipeline is a capillary network grid, the assembled energy wall 23 comprises a heat insulation plate 233, one side of the heat insulation plate 233 is provided with a buried pipe layer 232, and the capillary network grid is arranged on the surface of the other side of the buried pipe layer 232. The buried pipe layer 232 is a cement fiberboard, and the capillary grid is bonded to the surface of the buried pipe layer 232.

In this embodiment, the capillary spacing is small (5 mm-40 mm), the heat exchange area is large, and the heat exchange is uniform, so that the vapor chamber 231 is not arranged, and the buried pipe layer 232 is directly attached to the inner side (indoor space side) of the structural wall 22.

In the two embodiments, the buried pipe layer panel adopts cement fiber plates with the thickness of 50mm, when the large-pipe-diameter heat exchange pipe is adopted, the heat exchange pipe groove is prefabricated on the panel, the arrangement of the heat exchange pipe is convenient, and the pipe faces one side of the soaking plate. The branch pipe grooves are horizontally arranged in a serpentine shape, the main pipe is vertically arranged, holes for connecting the branch pipe with the water supply and return main pipe are reserved on the panel, the heat exchange coil pipe is made of high-temperature compression-resistant and corrosion-resistant cross-linked polyethylene pipe (Pe-Xa pipe for short), the outer diameter is 25mm, and the wall thickness is 2.3mm. The distance between the heat exchange tubes is preferably 0.3m, the inlet and the outlet of the heat exchange tubes are reserved with a certain length, the panel is extended out of the way, convenient later period the water collector is connected. The pipe orifice is plugged by the rubber plug in the wall body carrying process, foreign matters such as impurities are prevented from entering the pipeline, the pipeline is plugged, and the rubber plug is taken out after the installation is completed. When the capillary tube is used as the heat exchange tube, the capillary network grid material adopts tripropylene (polypropylene random, PP-R), the main tube diameter is 20 x 2mm, the branch tube diameter is 3.5-4.5mm, the wall thickness of the branch tube is 0.5-0.8mm, and the tube spacing is 20mm. The main pipeline is reserved with a horizontal pipe groove, the capillary network is tightly attached to the cement fiberboard, and the plastic row of the capillary network is tightly fastened and stuck on the surface of the cement fiberboard by using an adhesive.

In the above two embodiments, the heat insulation board 233 can effectively block heat exchange between the energy wall heat exchanger and the station side, so as to avoid heat carried in cooling water from being transferred into the station. The insulation board 233 was an extruded polystyrene foam insulation board (XPS) with a thickness of 80mm. XPS coefficient of heat conductivity is lower, has good thermal insulation performance, compressive resistance and shock resistance, and the water absorption is extremely low, and dampproofing, anticorrosion and prevention of seepage performance are splendid. Aluminum foils 234 are adhered to the surfaces of the heat preservation plates 233, the emissivity is close to 0, and the radiation heat exchange quantity between the assembled energy wall and other wall surfaces of the cavity can be reduced. The adoption of the smooth-surface aluminum tin film can reduce the convection heat exchange coefficient of the inner side surface of the heat preservation layer so as to reduce the convection heat exchange quantity.

The layers of the assembled energy wall are fixed by screws or round nails. During fixing, the position of the shooting nails should be noted to avoid the positions of pipelines laid in the panel or on the surface so as not to crack the water pipe.

The thickness of the whole assembled energy wall 23 is 130-135mm, the sizes are 2.4x1.2 m and 1.2x1.2 m, the assembled energy wall is directly fixed on the structural wall by using screws, meanwhile, the position of a pipeline paved in the wall surface is avoided, the bottom is tightly attached to the inner side of the structural wall, and the aluminum foil membrane paved on the heat insulation layer is exposed in the cavity.

The assembled energy wall 23 is a rectangular unit module, can be produced in factory standardization, can be designed into various types according to actual needs and according to the area and thickness, a large-area wall body is formed by splicing a plurality of unit modules in an array mode, and internal pipelines of the unit modules are connected in series. During construction, the unit modules are only needed to be spliced and connected with the pipelines, so that the construction can be fast carried out. The arrangement form of the buried pipes is not limited, meanwhile, the construction period can be shortened, the loss of building materials and the resource waste are reduced, the installation is convenient, the use is convenient, and the defects in the prior art can be overcome. Specifically, the internal pipeline of each unit module is connected to the main supply and return water pipeline by adopting a splicing pipe fitting.

The heat storage containers 4 are located in equipment rooms on both sides of the hall floor, specifically referred to as heat storage water tanks/tanks. The heat storage water tank/tank is made of stainless steel and is provided with a heat insulation material. The heat storage water tank/tank is used for temporarily storing redundant heat, and when the heat required to be transferred in the inner area and the heat required in the peripheral area are unbalanced in time, the heat is temporarily stored by arranging the heat storage water tank on the water loop, so that the heat is transferred in time.

The heat pump unit 1, the assembled energy wall system 2 and the heat storage container 4 are sequentially connected to the water loop 9. The valves 1 and 3 are arranged on the pipelines on two sides of the assembled energy wall system 2, and the valves 4 and 5 are arranged on the pipelines on two sides of the heat storage container 4. A valve 2 is arranged on the water loop which is connected with the assembled energy wall system 2 in parallel. The water loop 9 is also provided with a water loop circulating water pump 3 which is positioned between the assembled energy wall system 2 and the heat pump unit 1.

The air conditioning system also comprises a water treatment device 5, a water replenishing tank 6 and a water replenishing pump 7, which are sequentially connected and connected to a pipeline between the assembled energy wall system 2 and the heat pump unit 1, wherein the access point is positioned in front of the water loop circulating water pump 3.

In addition, the air conditioning system also comprises a constant pressure device 8 which is connected to a pipeline between the assembled energy wall system 2 and the heat pump unit 1 and is positioned at the inlet of the circulating water pump 3. The constant pressure device 8 is specifically an expansion tank or an air pressure tank. When an expansion tank is used, the tank is positioned at the highest point of the system. An air pressure tank may be used when the expansion tank is inconvenient to use and install. The constant pressure device 8 stabilizes the system pressure within a certain range and prevents water emptying or water vaporization. When the pressure of the system is reduced due to water loss caused by pollution discharge, system drip and the like, the system needs to be supplemented with water. When the expansion tank is used for constant pressure, the system is directly supplemented with water through the expansion tank. When the pressure is fixed by adopting the pneumatic tank, the water is automatically pumped from the water supplementing tank 6 through the water supplementing pump 7 to supplement water for the system, so that the stability of the pressure of the system is ensured.

The system fully utilizes the cavity between the underground station structure wall and the wall separation wall, and the assembled energy wall system is arranged in the cavity to form the heat removal and heating equipment of the subway station water ring heat pump air conditioning system, so that the system can be used for newly building a subway station and can also be used for conveniently reconstructing the energy system of the existing underground station. The technology does not need additional drilling and punching, reduces the cost and can reasonably utilize underground space. The system takes geothermal energy as external energy of the water ring heat pump air conditioning system, adopts an energy wall system to replace a cooling tower or a boiler in the traditional water ring heat pump air conditioning system, can achieve good energy saving effect, fully utilizes renewable energy, realizes environmental protection, and promotes realization of a double-carbon target in the field of underground construction. In addition, the technology greatly reduces the construction difficulty of the traditional energy wall, avoids wet operation, is convenient to install, has short operation period, saves resources and has remarkable environmental protection benefit.

The core component of the system is an assembled energy wall system 2, and the operation principle of the system is shown in fig. 2. When the heat is supplied in winter, when the residual heat in the inner area is insufficient to supply the heat in the peripheral area or all areas need to supply the heat, the assembled energy wall system 2 starts to operate, and the assembled energy wall system 2 is equivalent to a heater, absorbs the heat from the soil to heat the water in the water loop.

The invention utilizes the space of the cavity between the assembled energy wall and the separated wall, and the upper part and the lower part of the space are respectively provided with a ventilation opening, and the chimney effect is utilized to form hot-pressing natural ventilation. In summer, the upper and lower ventilation openings are opened, the upper ventilation opening is an air outlet, and the lower ventilation opening is equivalent to an air supplementing opening. When the energy wall operates, air in the cavity is heated, hot air rises to form bottom-up airflow, the air heated by the energy wall in the cavity is discharged, the temperature in the cavity is naturally cooled and reduced, the influence on the in-station thermal environment is reduced, the upper vent and the lower vent are closed in winter, the airflow speed in the cavity is reduced, the air temperature is increased, and the heat preservation and heat insulation performance of the cavity is enhanced.

Specifically, the system has the following operation modes:

mode 1, in transition season, the heat supply requirement of the peripheral area is smaller than the waste heat of the inner area

The operation process is as follows:

when the residual heat in the inner zone is large and the heat supply required in the peripheral zone is small, the temperature of the water loop 9 increases over 35 ℃.

At this time, as shown in fig. 5:

the valves 4, 5 on the heat storage container 4 pipeline are opened, and the heat storage container 4 starts to operate.

And closing the valves 1 and 3 on the pipelines of the assembled energy wall system 2, and stopping the operation of the assembled energy wall system 2.

The waste heat of the inner region enters a water loop 9 through a heat pump unit 1, and after heat is supplied to the peripheral region, the residual heat is stored in a heat storage container 4;

When the residual heat in the inner zone is insufficient to supply heat to the peripheral zone, i.e. the temperature in the water circuit 9 is lower than 15 ℃, the heat storage container 4 releases the stored heat into the water circuit 9, so that the temperature of the water circuit 9 is increased to supply heat to the peripheral zone.

Mode 2, in winter, the inner area has waste heat, and the heat supply required by the peripheral area is equal to the waste heat of the inner area

The operation process is as follows:

when the heat supply of the peripheral area is just satisfied by the waste heat of the inner area, the temperature of the water loop 9 is stabilized at 15-35 ℃ in the first winter.

At this time, as shown in fig. 6:

closing valves 4 and 5 on a pipeline of the heat storage container 4, and stopping the heat storage container 4;

closing valves 1 and 3 on a pipeline of the assembled energy wall system 2, and stopping the operation of the assembled energy wall system 2;

the valve 2 is opened, the water loop 9 is unblocked, and the waste heat in the inner area enters the water loop through the heat pump unit 1 to supply heat for the peripheral area.

Because the waste heat of the inner zone can just meet the heat supply of the peripheral zone, an auxiliary cooling tower or heating equipment is not needed for heat removal or heating

Mode 3, in winter, the inner area has waste heat, and the heat supply requirement of the peripheral area is larger than that of the inner area

When the heat supply required by the peripheral area is large in winter, the valves 4 and 5 on the pipeline of the heat storage container 4 are closed, and the heat storage container 4 does not run;

The waste heat of the inner zone enters the water loop through the heat pump unit to supply heat for the peripheral zone, but the waste heat of the inner zone is smaller than the heat supply quantity of the peripheral zone, so that the temperature in the water circulation loop is reduced, and the temperature is lower than 15 ℃ after a period of operation.

At this time, as shown in fig. 7:

Opening valves 1 and 3 on a pipeline of the assembled energy wall system 2, and starting the assembled energy wall system 2 to operate;

And the valve 2 is closed, the assembled energy wall system 2 exchanges heat with surrounding soil, and heat in the soil is absorbed and discharged into the water loop 9, so that the temperature of the water loop 9 is increased, the temperature is maintained above 15 ℃, and heat supply for a surrounding area is continued.

Mode 4, winter, no waste heat exists in the inner zone, and heat supply is needed in both the inner zone and the peripheral zone

The heat pump unit 1 is in a heating working condition, and the temperature of the water loop 9 is reduced to be lower than 15 ℃.

At this time, as shown in fig. 8:

closing valves 4 and 5 on the pipeline of the heat storage container 4, wherein the heat storage container 4 does not operate;

And the valve 2 is closed, the assembled energy wall system 2 exchanges heat with surrounding soil, and the heat in the soil is absorbed to enable the temperature of the water loop 9 to rise to be more than 15 ℃ so as to supply heat for the inner area and the surrounding area.

Mode 5 in summer, both the inner zone and the peripheral zone require cooling

The heat pump unit 1 is in a refrigerating working condition, all units discharge condensation heat into a water loop 9, the temperature of the water loop is increased, and the temperature is higher than 35 ℃.

At this time, as shown in fig. 9:

And closing the valve 2, and exchanging heat between the assembled energy wall system 2 and surrounding soil, and discharging heat carried by the water loop into the surrounding soil to reduce the temperature of the water loop, and maintaining the temperature below 35 ℃ to cool the inner area and the surrounding area.

In the operation of the system, when the flow of the circulating water system is smaller, a constant flow operation mode can be adopted, and when the flow of the system is larger, a variable flow operation mode is adopted. When the variable flow operation mode is adopted, a switch type electric valve which is in linkage control with the start and stop of the unit is arranged on a circulating water pipeline of the unit.

The invention has the following technical advantages:

(1) The assembled energy wall is used as an underground heat exchanger, is positioned in a cavity between the underground station structure wall and the wall-separating wall, is combined with the underground enclosure structure, does not occupy the underground space additionally, saves land resources, overcomes the defect of large occupied area of the traditional vertical drilling buried pipe heat exchanger, and promotes the efficient utilization of the underground space.

(2) The assembled energy wall can transfer waste heat into surrounding soil, is used as auxiliary heat removal equipment of the water ring heat pump, and replaces a cooling tower in a traditional water ring heat pump air conditioning system. The assembled energy wall can also extract geothermal energy from soil to supply heat, and is used as auxiliary heating equipment of the water ring heat pump, and replaces high-potential energy heating equipment such as an electric boiler and a gas boiler adopted by the traditional water ring heat pump. Compared with the traditional auxiliary cold and heat source equipment, the energy-saving and carbon-reducing water-ring heat pump air conditioning system fully utilizes renewable energy as external supplementary energy of the water-ring heat pump air conditioning system, and has remarkable energy-saving and carbon-reducing effects.

(3) The assembled energy wall disclosed by the invention is simple to manufacture, can be directly arranged on the inner surface of the structural wall, is convenient to install, does not influence the mechanical property of the structural wall, greatly reduces the construction difficulty of the traditional energy wall, shortens the construction period, and is convenient to modify the energy system of the existing subway station.

The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.

Claims

1. An underground station energy wall water ring heat pump air conditioning system which is characterized in that:

the air conditioning system comprises a heat pump unit (1), an assembled energy wall system (2) and a heat storage container (4), wherein the heat pump unit (1) is a water-air heat pump unit;

The heat pump unit (1) is positioned in a room for equipment, a station hall layer and a platform layer which need cooling or heating, the assembled energy wall system (2) is positioned in a cavity between a structural wall (22) and a wall separating wall (25) of an underground station, and the heat storage container (4) is positioned in the room for equipment at two sides of the station hall layer;

the heat pump unit (1), the assembled energy wall system (2) and the heat storage container (4) are all connected to the water loop (9).

2. An underground station energy wall water ring heat pump air conditioning system as recited in claim 1 wherein:

The air conditioning system further comprises a water treatment device (5) and a water supplementing tank (6), and the water treatment device and the water supplementing tank are sequentially connected and connected to a water loop (9) between the assembled energy wall system (2) and the heat pump unit (1).

3. An underground station energy wall water ring heat pump air conditioning system as recited in claim 2 wherein:

the air conditioning system further comprises a constant pressure device (8), and the constant pressure device is connected to a water loop (9) between the assembled energy wall system (2) and the heat pump unit (1).

4. An underground station energy wall water ring heat pump air conditioning system as recited in claim 1 wherein:

the assembled energy wall system (2) comprises an assembled energy wall (23), wherein the assembled energy wall (23) is positioned between a structural wall (22) and a wall-separating wall (25) of an underground station and is close to the soil side (21) and is clung to the structural wall (22);

An air layer (24) is reserved between the assembled energy wall (23) and the wall separating wall (25), and a ventilation opening is formed in the top of the air layer (24) and is led to the ground.

5. The underground station energy wall water ring heat pump air conditioning system of claim 4, wherein:

The assembled energy wall (23) comprises a buried pipe layer (232), a soaking plate (231) is arranged on the soil side of the buried pipe layer (232), a heat insulation plate (233) is arranged on the air side of the buried pipe layer (232), and an aluminum foil (234) is attached to the outer side of the heat insulation plate (233).

6. A method of operating an underground station energy wall water loop heat pump air conditioning system as recited in any of claims 1-5 wherein:

the method is implemented when the heat supply quantity of the peripheral area is smaller than the residual heat quantity of the inner area, and comprises the following steps:

opening a valve on a pipeline of the heat storage container (4), and starting the heat storage container (4) to operate;

Closing a valve on a pipeline of the assembled energy wall system (2), and stopping the operation of the assembled energy wall system (2);

The waste heat quantity in the inner area enters a water loop (9) through a heat pump unit (1), and after heat is supplied to the peripheral area, the residual heat is stored in a heat storage container (4);

when the residual heat in the inner area is insufficient to supply heat to the peripheral area, the heat storage container (4) releases the stored heat into the water loop (9), so that the temperature of the water loop (9) is increased to supply heat to the peripheral area.

7. A method of operating an underground station energy wall water loop heat pump air conditioning system as recited in any of claims 1-5 wherein:

the method is implemented when the heat supply quantity of the peripheral zone is equal to the residual heat quantity of the inner zone, and comprises the following steps:

closing a valve on a pipeline of the heat storage container (4), and stopping the heat storage container (4);

the water loop (9) is smooth, and the waste heat in the inner area enters the water loop (9) through the heat pump unit (1) to supply heat for the peripheral area.

8. A method of operating an underground station energy wall water loop heat pump air conditioning system as recited in any of claims 1-5 wherein:

The method is implemented when the heat supply quantity of the peripheral area is larger than the residual heat quantity of the inner area, and comprises the following steps:

the waste heat quantity in the inner area enters a water loop (9) through a heat pump unit (1), and after heat is supplied to the peripheral area, the temperature of the water loop (9) is reduced;

Opening a valve on a pipeline of the assembled energy wall system (2), and starting the operation of the assembled energy wall system (2);

The assembled energy wall system (2) exchanges heat with surrounding soil, absorbs heat in the soil to raise the temperature of the water loop (9) and supplies heat to the surrounding area.

9. A method of operating an underground station energy wall water loop heat pump air conditioning system as recited in any of claims 1-5 wherein:

the method is implemented when the inner zone has no waste heat, and the inner zone and the peripheral zone all need to supply heat, and comprises the following steps:

the heat pump units (1) are all in heating working conditions, and the temperature of the water loop (9) is reduced;

10. A method of operating an underground station energy wall water loop heat pump air conditioning system as recited in any of claims 1-5 wherein:

the method is carried out when cooling is required in both the inner zone and the peripheral zone, and comprises the following steps:

The heat pump units (1) are all in refrigeration working conditions, and the temperature of the water loop (9) is increased;

the assembled energy wall system (2) exchanges heat with surrounding soil, and discharges heat into the surrounding soil to reduce the temperature of the water loop (9) and cool the surrounding area.