阅读说明：本技术 一种单井双管式含水层储能系统 (Single-well double-pipe type aquifer energy storage system ) 是由 戴志清 欧阳鑫南 邬小波 刘铮 梁晗 赵雁培 房贤印 柯弋 胡青松 陈北领 于 2021-08-30 设计创作，主要内容包括：一种单井双管式含水层储能系统,包括换热器、井室、止水段、空调机房、分割连通器、压力平衡井、滤水管、滤料、潜水泵,所述滤水管包括第一滤水管、第二滤水管、第三滤水管、第四滤水管,所述滤料包括第一滤料、第二滤料,所述潜水泵包括第一潜水泵、第二潜水泵,所述井室下侧设置止水段,所述止水段下侧设置第一滤料,所述第一滤料下侧设置止水段,所述下层止水段下侧设置第二滤料,所述井室内部设置换热器,所述井室右侧设置空调机房,所述空调机房通过机组侧管路连接换热器,所述井室下侧设置2个取水井,取水井上端与井室相通。(The utility model provides a single well double tube formula aquifer energy storage system, includes heat exchanger, well room, stagnant water section, air conditioner room, cuts apart linker, pressure balance well, strainer, filter material, immersible pump, the strainer includes first strainer, second strainer, third strainer, fourth strainer, the filter material includes first filter material, second filter material, the immersible pump includes first immersible pump, second immersible pump, the well room downside sets up stagnant water section, stagnant water section downside sets up first filter material, first filter material downside sets up stagnant water section, lower floor stagnant water section downside sets up the second filter material, the inside heat exchanger that sets up of well room, the well room right side sets up air conditioner room, air conditioner room passes through unit side tube coupling heat exchanger, the well room downside sets up 2 and gets the well, gets the well upper end and communicates with each other with the well room.)

1. The single-well double-tube type aquifer energy storage system is characterized by comprising a heat exchanger, a well chamber, a water stop section, an air conditioner room, a partition communicating device, a pressure balance well, filter pipes, filter materials and a submersible pump, wherein the filter pipes comprise a first filter pipe, a second filter pipe, a third filter pipe and a fourth filter pipe, the filter materials comprise a first filter material and a second filter material, the submersible pump comprises a first submersible pump and a second submersible pump, the water stop section is arranged on the lower side of the well chamber, the first filter material is arranged on the lower side of the water stop section, the second filter material is arranged on the lower side of the water stop section, the heat exchanger is arranged in the well chamber, the air conditioner room is connected with the heat exchanger through a unit side pipeline, the lower side of the well chamber is provided with 2 water taking wells, the upper ends of the water taking wells are communicated with the well chamber, and the left water taking wells penetrate through the upper water stop section, In first filter material, downside stagnant water section inserted the second filter material, left side intake well upper end set up at the second filter material upside, and left side intake well passes first filter material section and sets up first strainer, first strainer intraduct sets up first immersible pump, heat exchanger is connected to first immersible pump upper end, and right side intake well passes upside stagnant water section, first filter material, downside stagnant water section and inserts in the second filter material, and right side intake well degree of depth is greater than left side intake well degree of depth in the second filter material, and right side intake well second filter material section sets up the second strainer, the inside second immersible pump that sets up of second strainer, heat exchanger is connected to second immersible pump upper end.

2. The single-well double-pipe type aquifer energy storage system of claim 1, wherein a pressure balance well is arranged on the left side of the well chamber, a dividing communicating vessel is arranged in the middle of the pressure balance well, the dividing communicating vessel can be a pneumatic separator or a mechanical separator, a third water filter pipe is arranged on the upper side of the dividing communicating vessel, and a fourth water filter pipe is arranged on the lower portion of the dividing communicating vessel.

3. The method of operating a single well dual tubular aquifer energy storage system according to claim 2, comprising the steps of:

firstly, extracting underground water from an upper section cold area by a first submersible pump in summer, directly entering a well chamber to exchange heat with a unit side pipeline, raising the temperature, filtering and purifying, and entering a lower section hot area to be stored, wherein cold and hot subareas are selected flexibly according to geological and project conditions;

secondly, extracting underground water from a lower-section hot area by a second submersible pump in winter, directly entering a well chamber to exchange heat with a pipeline on the side of the unit, increasing the temperature, filtering and purifying, and entering an upper-section cold area to store, wherein the selection of cold and hot subareas can be flexibly selected according to geological and project conditions;

and thirdly, a partition communicating vessel is arranged in the pressure balance well, and intermittent opening or closing is selected according to the recharge quantity condition, so that recharge can be ensured, and heat breakthrough can be reduced as much as possible.

Technical Field

The invention relates to the field of shallow geothermal energy storage and utilization, in particular to a single-well double-pipe type aquifer energy storage system.

Background

Geothermal energy is a renewable energy source, has the advantages of wide distribution, low cost, easy exploitation, cleanness, direct utilization and the like, greatly promotes the utilization of geothermal energy, is an effective measure for resource conservation and environmental protection, and is an important way for realizing the sustainable development of human society. Shallow geothermal energy is the main technical field of geothermal energy utilization.

Aquifer energy storage is an energy-saving technology which can store heat energy under the ground and can be recycled, and is widely applied to heating and cooling of building air-conditioning environment, and underground water is extracted and recharged from the aquifer through an underground energy storage well to realize energy storage and heat energy recovery.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a single-well double-pipe type aquifer energy storage system which improves the efficiency and the energy saving rate.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a single well double tube formula aquifer energy storage system, includes heat exchanger, well room, stagnant water section, air conditioner room, cuts apart linker, pressure balance well, strainer, filter material, immersible pump, the strainer includes first strainer, second strainer, third strainer, fourth strainer, the filter material includes first filter material, second filter material, the immersible pump includes first immersible pump, second immersible pump, the well room downside sets up stagnant water section, stagnant water section downside sets up first filter material, first filter material downside sets up stagnant water section, lower floor stagnant water section downside sets up the second filter material, the inside heat exchanger that sets up of well room, well room right side sets up air conditioner room, air conditioner room passes through unit side tube coupling heat exchanger, well room downside sets up 2 water intaking wells, and the water intaking well upper end communicates with each other with the well room, and the left side water intaking passes upside stagnant water section, In first filter material, downside stagnant water section inserted the second filter material, left side intake well upper end set up at the second filter material upside, and left side intake well passes first filter material section and sets up first strainer, first strainer intraduct sets up first immersible pump, heat exchanger is connected to first immersible pump upper end, and right side intake well passes upside stagnant water section, first filter material, downside stagnant water section and inserts in the second filter material, and right side intake well degree of depth is greater than left side intake well degree of depth in the second filter material, and right side intake well second filter material section sets up the second strainer, the inside second immersible pump that sets up of second strainer, heat exchanger is connected to second immersible pump upper end.

The pressure balance well is arranged on the left side of the well chamber, the dividing communicating device is arranged in the middle of the pressure balance well, the dividing communicating device can be a pneumatic separator or a mechanical separator, a third water filter pipe is arranged on the upper side of the dividing communicating device, and a fourth water filter pipe is arranged on the lower portion of the dividing communicating device.

Has the advantages that:

the energy storage well is preferably drilled and completed by a pumping or gas lift reverse circulation drilling process, mud is not used as much as possible during the drilling of the aquifer, and a diamond sand filter material is carefully selected and strictly graded with the diameter of the aquifer sand. The first submersible pump and the second submersible pump are selected after accurate hydraulic calculation. The geothermal water pipeline selects a proper pressure grade according to actual conditions. The first filter pipe, the second filter pipe, the third filter pipe and the fourth filter pipe are PVC filter pipes (micron-sized filter seams). The pressure balance well is provided with a pneumatic or mechanical separator in the well, and the separator is intermittently opened or closed according to the recharge quantity.

The invention is mainly characterized in that a single-well double-well pipe well-completion process is used, a lower side water stop section divides a water-bearing layer into an upper section and a lower section (a water-bearing layer and a plugging material are arranged in the middle), the upper section is pumped in summer and filled in winter, the lower section is pumped in winter and filled in summer, thus the upper section forms a cold area, and the lower section forms a hot area; or the lower section of the water tank is pumped in summer and irrigated in winter and the upper section of the water tank is pumped in winter according to different geological structures and project characteristics, so that the upper section forms a hot area and the lower section forms a cold area, and the system efficiency and the energy saving rate are improved.

Hot water generated by refrigeration in summer is stored in the lower section hot zone, the water temperature is 5-8 ℃ higher than the natural temperature of underground water, namely, the heat energy of 5-8 ℃ is stored in summer; the cold water produced by heating in winter is stored in the upper-section cold area, and the water temperature of the cold well is about 5-8 ℃ lower than the natural temperature of underground water, namely the cold energy of 5-8 ℃ is stored in winter. The sample single-well double-pipe type aquifer energy storage system forms a cyclic closed energy storage system, and is used in winter and summer, and is used in summer and hot summer, so that the energy saving rate is greatly improved.

By combining the conditions of the cold and hot load of the building, the annual accumulated load and the like, the system can also be coupled with a solar heat collector and the like to increase the temperature of summer irrigation water and increase the heat storage capacity of a heating area so as to adapt to an area with larger heat load in the north; and the temperature of the water poured in the winter can be reduced by coupling a cooling tower and the like, and the cold storage capacity of a cold area is increased so as to adapt to an area with larger cold load in the south. Thus, the heat storage capacity is increased, and the system efficiency is improved.

The invention can reduce the pipeline arrangement and save the construction cost; the combination of the mining and the irrigation at the same place is beneficial to the prevention and the treatment of underground settlement.

The invention makes a series of improvements and suggestions to the drilling and well-completion processes, and adopts the gas lift reverse circulation clean water drilling process, thereby solving the pollution of the energy storage well caused by mud retaining wall and ensuring the water path of the underground aquifer to be smooth; the PVC filter pipe (micron-sized filter joint) is strictly graded in the diameter of the selected diamond sand filter material and aquifer sand, and the problem of chronic diseases caused by sediment blockage of the underground water source heat pump is effectively solved.

The system provided by the invention is characterized in that a pressure balance well is arranged at a position 10-30m (set according to the runoff speed of an underground aquifer) beside the spacing unit, a pneumatic or mechanical separator is arranged in the well, and intermittent opening or closing is selected according to the recharge quantity condition, so that recharge can be ensured and thermal breakthrough can be reduced as much as possible.

Drawings

Fig. 1 is a schematic structural diagram of a single-well double-pipe type aquifer energy storage system according to the invention.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples:

a single-well double-tube type aquifer energy storage system comprises a heat exchanger 1, a well chamber 2, a water stop section 3, an air conditioner room 11, a partition communicating vessel 13, a pressure balance well 15, filter pipes, a filter material and a submersible pump, wherein the filter pipes comprise a first filter pipe 4, a second filter pipe 8, a third filter pipe 12 and a fourth filter pipe 14, the filter material comprises a first filter material 5 and a second filter material 7, the submersible pump comprises a first submersible pump 6 and a second submersible pump 9, the lower side of the well chamber 2 is provided with the water stop section 3, the lower side of the water stop section 3 is provided with the first filter material 5, the lower side of the first filter material 5 is provided with the water stop section 3, the lower side of the lower-layer water stop section 3 is provided with the second filter material 7, the heat exchanger 1 is arranged in the well chamber 2, the air conditioner room 11 is arranged on the right side of the well chamber 2, the air conditioner room 11 is connected with the heat exchanger 1 through a unit side pipeline 10, the lower side of the well chamber 2 is provided with 2 water taking wells, get well upper end and well chamber 2 and communicate with each other, the left side is got the well and is passed the stagnant water section of upside 3, first filter material 5, the stagnant water section of downside 3 and insert in second filter material 7, and the left side is got the well upper end and is set up at 7 upsides of second filter material, and the left side is got the well and is passed 5 sections of first filter material and set up first strainer 4, the inside first immersible pump 6 that sets up of first strainer 4, heat exchanger 1 is connected to first immersible pump 6 upper end, and the right side is got the well and is passed the stagnant water section of upside 3, first filter material 5, the stagnant water section of downside 3 and insert in second filter material 7, and the right side is got the well and is greater than the left side and is got the well degree of depth in second filter material 7, and the right side is got well second filter material 7 sections and set up second strainer 8, the inside second immersible pump 9 that sets up of second strainer 9, heat exchanger 1 is connected to second immersible pump 9 upper end.

The left side of the well chamber 2 is provided with a pressure balance well 15, the middle part of the pressure balance well 15 is provided with a division communicating vessel 13, the division communicating vessel 13 can be a pneumatic separator or a mechanical separator, the upper side of the division communicating vessel 13 is provided with a third water filter pipe 12, and the lower part of the division communicating vessel 13 is provided with a fourth water filter pipe 14.

The energy storage well is preferably drilled and completed by a pumping or gas lift reverse circulation drilling process, mud is not used as much as possible during the drilling of the aquifer, and a diamond sand filter material is carefully selected and strictly graded with the diameter of the aquifer sand. The first submersible pump 6 and the second submersible pump 9 are selected after accurate hydraulic calculation. The geothermal water pipeline selects a proper pressure grade according to actual conditions. The first filter pipe 4, the second filter pipe 8, the third filter pipe 12 and the fourth filter pipe 14 are PVC filter pipes (micron-sized filter seams). The pressure balance well 15 is internally provided with a pneumatic or mechanical separator which is intermittently opened or closed according to the recharging quantity.

The invention is mainly characterized in that a single-well double-well pipe well-completion process is used, a lower side water stop section 3 divides a water-bearing layer into an upper section and a lower section (a water-bearing layer and a plugging material are arranged in the middle), the upper section is pumped in summer and filled in winter, and the lower section is pumped in winter and filled in summer. Thus the upper section forms a cold zone and the lower section forms a hot zone; or the lower section of the water tank is pumped in summer and irrigated in winter and the upper section of the water tank is pumped in winter according to different geological structures and project characteristics, so that the upper section forms a hot area and the lower section forms a cold area, and the system efficiency and the energy saving rate are improved.

Hot water generated by refrigeration in summer is stored in the lower section hot zone, the water temperature is 5-8 ℃ higher than the natural temperature of underground water, namely, the heat energy of 5-8 ℃ is stored in summer; the cold water produced by heating in winter is stored in the upper-section cold area, and the water temperature of the cold well is about 5-8 ℃ lower than the natural temperature of underground water, namely the cold energy of 5-8 ℃ is stored in winter. The sample single-well double-pipe type aquifer energy storage system forms a cyclic closed energy storage system, and is used in winter and summer, and is used in summer and hot summer, so that the energy saving rate is greatly improved.

By combining the conditions of the cold and hot load of the building, the annual accumulated load and the like, the system can also be coupled with a solar heat collector and the like to increase the temperature of summer irrigation water and increase the heat storage capacity of a heating area so as to adapt to an area with larger heat load in the north; and the temperature of the water poured in the winter can be reduced by coupling a cooling tower and the like, and the cold storage capacity of a cold area is increased so as to adapt to an area with larger cold load in the south. Thus, the heat storage capacity is increased, and the system efficiency is improved.

The invention can reduce the pipeline arrangement and save the construction cost; the combination of the mining and the irrigation at the same place is beneficial to the prevention and the treatment of underground settlement.

The invention makes a series of improvements and suggestions to the drilling and well-completion processes, and adopts the gas lift reverse circulation clean water drilling process, thereby solving the pollution of the energy storage well caused by mud retaining wall and ensuring the water path of the underground aquifer to be smooth; the PVC filter pipe (micron-sized filter joint) is strictly graded in the diameter of the selected diamond sand filter material and aquifer sand, and the problem of chronic diseases caused by sediment blockage of the underground water source heat pump is effectively solved.

The system provided by the invention is characterized in that a pressure balance well is arranged at a position 10-30m (set according to the runoff speed of an underground aquifer) beside the spacing unit, a pneumatic or mechanical separator is arranged in the well, and intermittent opening or closing is selected according to the recharge quantity condition, so that recharge can be ensured and thermal breakthrough can be reduced as much as possible.

A single-well double-pipe type aquifer energy storage system operation method comprises the following steps:

firstly, in summer, underground water is extracted from an upper section cold area by a first submersible pump 6, the underground water directly enters a well chamber 2 to exchange heat with a unit side pipeline 10, the temperature is increased, the underground water is filtered and purified, the underground water enters a lower section hot area to be stored, and the selection of cold and hot areas can be flexibly selected according to geological and project conditions;

secondly, extracting underground water from a lower-section hot area by a second submersible pump 9 in winter, directly entering a well chamber 2 to exchange heat with a unit side pipeline 10, raising the temperature, filtering and purifying, entering an upper-section cold area to be stored, and flexibly selecting cold and hot areas according to geological and project conditions;

and thirdly, a division communicating vessel 13 is arranged in the pressure balance well 15, and intermittent opening or closing is selected according to the condition of recharge quantity, so that recharge can be ensured, and heat breakthrough can be reduced as much as possible.