Geothermal energy utilization heating and cooling system

Abstract

To construct a cooling and heating system utilizing geothermal heat, which has less installation cost and operation cost.SOLUTION: A geothermal heat and solar heating and cooling system comprises a well for pumping groundwater, means for groundwater infiltration (a well, an infiltration basin, permeable pavement), a reservoir, solar panels, a heat exchanger, and a heating and cooling facility in a building. The geothermal heat and solar heating and cooling system uses electricity generated by the solar panels to drive a pump to draw up groundwater and supply it to the reservoir; exchanges heat from water in the reservoir to heating and cooling heat in a building with the heat exchanger; and returns water that overflows from the reservoir back into the ground.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a technology for using geothermal heat for heating and cooling.

Background Art

[0002] Attempts have been made to utilize geothermal heat with a constant temperature throughout the year. For example, groundwater is pumped up and used for melting snow on the road surface. There are methods such as spraying groundwater on the road surface and a method of heat exchange and then returning the pumped groundwater to the ground from a recharge well. Many technologies for using geothermal heat for heating and cooling have also been proposed. In Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-281493), an exterior pipe buried over an aquifer holding geothermal water, a geothermal water inlet strainer for allowing geothermal water in the aquifer to enter the exterior pipe, a geothermal water pump for pumping up the geothermal water that has entered the exterior pipe, a geothermal water supply pipe for circulating the pumped geothermal water to a predetermined site as a heat source, a geothermal water reduction strainer for returning the geothermal water that has circulated through the geothermal water supply pipe and returned to the exterior pipe to the aquifer, a storage tank for collecting and storing water such as snowmelt water, rainwater, and sprinkled water generated within the site without allowing it to flow out of the site, a sprinkling means for sprinkling the water in the storage tank on the site, and a geothermal water replenishment means for appropriately replenishing geothermal water as water for sprinkling from the geothermal water supply pipe to the storage tank, a geothermal water environmental protection type heat supply system has been proposed. The air conditioning system described in Patent Document 2 (Japanese Patent Application Laid-Open No. 2013-137187) includes a storage tank, a circulation path, and a heat exchanger. The storage tank uses an underground space adjacent to or close to the building as a water storage section for storing rainwater, and a moisture permeable layer for allowing moisture to permeate is provided on the upper surface of this water storage section. The circulation path circulates the rainwater stored in the storage tank through the residence. is. The heat exchanger is provided in a dwelling through which the circulation path passes, exchanges heat with the air inside the dwelling, and stores The water tank uses the voids between the stones filled in the underground space as a water storage part for storing rainwater, and the outer wall of the building prevents heating due to reflected sunlight and radiant heat, thus suppressing heating of the outer wall of the building. A cooling and heating system that can Patent Document 3 (Japanese Unexamined Patent Application Publication No. 2010-190435) discloses a heat exchange well formed toward the ground, with a capillary rise provided at the upper part of the heat exchange well where a circulation pipe through which the refrigerant or heat medium circulates is arranged, and a water penetration means for promoting heat exchange by allowing water such as rainwater to penetrate into the capillary rise. A rainwater infiltration type ground heat exchange system that returns rainwater to the ground and can more efficiently exchange ground heat is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional heat extraction holes for extracting ground heat have high installation costs and high operating costs, with poor profitability, and the use of ground heat has not spread in urban areas except for snowmelt in snowy regions. An object is to construct a heating and cooling system that utilizes ground heat with reduced installation costs and operating costs.

Means for Solving the Problems

[0005] ​​​ 1. A ground source heat pump heating and cooling system comprising a groundwater pumping well, a groundwater infiltration means (well, infiltration pit, permeable pavement), a storage tank, a heat exchanger, and a building heating and cooling equipment, which pumps groundwater by driving a pumping pump and supplies it to the storage tank, exchanges the heat of the water in the storage tank with the heat for building heating and cooling by a heat exchanger, and returns the water overflowing from the storage tank to the ground. 2. The building heating and cooling equipment includes a partition panel for radiant heating and cooling, wherein the partition panel for radiant heating and cooling has pipes through which a heat-exchangeable medium passes buried inside a PC panel constituting the panel body, and unevenness is provided on the surface of the PC panel, and the space of the unevenness serves as an air flow path. The ground source heat pump heating and cooling system according to 1., characterized in that. 3. The groundwater pumping well draws water from a water vein with a groundwater flow of more than the regulated pumping volume. The ground source heat pump heating and cooling system according to 1. or 2., characterized in that. 4. The storage tank is a pool at least partially exposed on the ground surface, and a water discharge port is provided at a position accessible from an external road. The ground source heat pump heating and cooling system according to any one of 1. to 3., characterized in that. 5. The heat storage tank is provided with a heat collection pipe, and the heat medium is sent from the heat collection pipe to the heat exchanger, which is a ground heat utilization heating and cooling system according to any one of 1. to 4. 6 . The storage tank is provided adjacent to a first-floor living room. The ground source heat pump heating and cooling system according to any one of 1. to 5 . characterized in that. 7 . The water intake volume is integrated with the operating time of the pumping pump and controlled to be less than or equal to the regulated pumping volume. The ground source heat pump heating and cooling system according to any one of 1. to 6 . characterized in that. 8 . 1. to 7 . A disaster-independent water supply system characterized in that the ground source heat pump heating and cooling system according to any one of. stops heat exchange during water cut-off and supplies water for neighboring areas.

Advantages of the Invention

[0006] 1. This heating and cooling system pumps up geothermal heat as groundwater from a normal well and stores it in a storage tank and supplies it as a heating and cooling heat source in the building when necessary. Since solar power generation is used as the pumping power, the pumping well can be installed by ordinary boring etc., and when solar power generation operates it drives the pumping pump to store water. Therefore, there is no need to construct a deep heat extraction facility or a heat exchange system, the initial cost can be reduced, and maintenance also uses solar power generation, so it is economical. The heating and cooling system of the present invention can be used throughout the year for heating by utilizing the warm groundwater temperature in winter and for cooling by utilizing the low groundwater temperature in summer. 2. After use, the groundwater is basically returned to the ground by surface watering and infiltration, so it does not increase the load on the groundwater facility and does not cause depletion of the groundwater level. Sewage water usage fees are not imposed either. According to the heating and cooling times, the water in the cold lower layer of the pond can be discharged or the warm surface water can be drained to improve the efficiency of heating and cooling. The overflow water is watered to lower the ground surface temperature by the pumping effect. The management of the pumping volume can be carried out by measuring the pumping volume or the drainage volume. For example, since the pumping volume of the pump per unit time is determined, the maximum operating time of the pump corresponding to the regulated pumping volume is calculated and timer management for regulating the operating time of the pump is carried out. Also, a water meter is installed at the drainage outlet of the storage tank to calculate the regulated pumping volume from the drainage volume. 3. Since the storage tank is exposed on the ground surface, it is consciously aware that there is water daily and can be utilized as a hydrophilic area and green space watering is also possible. Also, it can be utilized as emergency water, and since it pumps water using solar power generation electric power, water can be continuously secured even if commercial power goes down. That is it can be utilized as a disaster prevention water source for the neighborhood. 4. A partition panel for radiant heating and cooling with unevenness on its surface is used as a heat dissipation device in a building. Therefore, there is no need to install a device like an indoor unit, and since it is a surface heat dissipation plate, even if the temperature difference from the room temperature is small, heat energy can be supplied as an area, and a gentle and soft heat source can be realized. Even when the temperature of the heat medium flowing in the panel is relatively high during cooling, due to surface heat dissipation it can fully cope. This radiant heating and cooling can provide a comfortable feeling whether the temperature is high during cooling or low during heating. Since it does not create an air flow by a fan, it is a heating and cooling with a small risk of airborne infection due to the influence of upwind and downwind. 5. In cities located near rivers or estuaries, the groundwater level is high and within dozens of meters, so a shallow pumping well is sufficient, and the present invention is suitable as a heating and cooling system using groundwater in Japan and monsoon regions. 6. By providing a storage tank adjacent to the living room on the first floor, it becomes difficult for people to break into the room from the window, so it has a crime prevention effect. In addition, it can provide an excellent view facing the waterside space.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0008] The present invention is an invention that utilizes geothermal heat in shallow groundwater veins in Japan for building heating and cooling, and is a system that can be generally utilized while suppressing initial costs and running costs. And it is a system that can be diverted to a disaster water supply system that can supply water to neighboring areas as an emergency measure in the event of disasters such as earthquakes due to water cut-off or power failure. The present invention pumps groundwater from a normal well and stores it in a storage tank, and exchanges the heat of the groundwater to use it as a heat source for building heating and cooling. As the driving power of the pumping pump, a solar power generation panel is used, and the amount of pumped water due to irregular power generation by solar power generation is stored in the storage tank to provide a buffer function. Also, the amount of water in the storage tank can be used to cope with fluctuations in the heat demand of the building. After heat exchange, the water is returned to the ground by the infiltration method, so depletion of groundwater is also prevented. The present invention can create a well by normal boring excavation, and the pumping power is covered by solar power generation , and since the water after use is returned to the ground, both the initial cost and the running cost can be reduced. Since it does not drain into the sewage, the drainage cost is also unnecessary. Since the storage tank is provided within the site, it becomes difficult for it to enter the building facing the storage tank, which is also advantageous for crime prevention, and there is also a hydrophilic effect, and an improvement in the landscape and a psychological stress relief effect can be expected.

[0009] Also, since solar power generation is used, it can operate even during a power outage and can also be utilized as a water supply facility for neighboring areas during disasters. Since the temperature of groundwater changes little throughout the year, it can be used throughout the year for cooling and heating. Moreover, many Japanese cities are located near rivers or estuaries, the groundwater veins are high, and dozens of meters ​​Since it is within one meter, a shallow pumping well is sufficient, and the present invention is suitable for use in Japan and monsoon regions as a heating and cooling system using groundwater.

[0010] Furthermore, even when the temperature difference between the temperature of the storage pool and the temperature of the heat medium exchanged is small, in the present invention, by using the surface radiation heat panel as a heat dissipation means inside the building, it is possible to provide the necessary amount of heat. Yes. As the heat dissipation means inside the building, the heat dissipation panel can be used as a partition wall panel to supply heat to both adjacent rooms. Also, the heat dissipation panel can be prepared in a ready-made size as a precast board, or cast in place with concrete and manufactured for each building under construction. Yes. For the heat dissipation panel, it is suitable to provide unevenness or convex ribs on the surface of the panel so that there is a gap so that furniture does not adhere closely to the surface of the panel. Yes.

[0011] A configuration example of the ground-source heat and solar energy utilization heating and cooling system 10 of the present invention is shown in FIG. 1. The ground-source heat and solar energy utilization heating and cooling system 10 includes a pumping well 1 for groundwater, a groundwater infiltration means (well, infiltration tank, permeable paving) 2, a storage pool 3, a solar power generation panel 4, a heat exchanger 5 , and an in-building heating and cooling facility 6 having a partition panel 7 with a heat dissipation function, etc. Using the electricity generated by the solar power generation panel 4 to drive the pumping pump 11 to pump up groundwater and supply it to the storage pool 3, and exchanging the heat of the water 31 in the storage pool with the heat for in-building heating and cooling by the heat exchanger 5, After heat exchange, the water is returned to the ground using groundwater infiltration means 2 such as sprinkling. Yes.

[0012] The pumping well 1 for groundwater is drilled by boring or the like to reach the groundwater vein W . In Japan, groundwater veins are generally shallow, about 10 to 50 meters underground. Japanese cities and residential areas are located in river basins and are constantly replenished as spring water, so new water can be drawn. Water is pumped from the pumping well 1 using the pumping pump 11 and stored in the storage tank 3. The pumping pump 11 is driven using the electricity obtained from the solar power generation panel 4. Although the power generation amount is not constant, by storing water in the storage tank 3, the amount of water required for building heating and cooling can be ensured. The storage tank also functions to adjust the imbalance between the pumping volume by the pumping pump 11 driven by unstable solar power generation and the heat demand of the building 61.

[0013] The storage tank 3 is a facility for storing the water pumped from the pumping well 1 by the pumping pump 11. In principle, it is provided within the site of the building 61 to which the in - ground heat and solar energy utilization heating and cooling system 10 is applied. The storage tank 3 can be installed above or below ground. However, when installed above ground, a head can be utilized when supplying water to or sprinkling water on the heat exchanger 5, resulting in energy savings. The same applies when supplying water in case of an emergency. When installed underground, its upper surface can be utilized as a garden or a parking space. In the present invention, since it also serves as emergency water provided to the neighborhood in case of an emergency, even when the storage tank is installed underground, it is desirable to have a part exposed so that neighboring residents can be aware of it on a daily basis. The water storage capacity of the storage tank 3 is designed according to the heating and cooling needs of the building 61. However, since the operation of the pumping pump 11 depends on the power generation of the solar power generation panel 4, it is set to a capacity with a margin considering the pump operation rate. Adjusting the management of the water in the tank for cooling and heating can improve the efficiency of heating and cooling. Since cold water accumulates at the bottom of the pool, during the heating season, the pool water is discharged from the bottom side (lower layer side) to discharge the cold lower layer water. During the cooling season, when discharging from the upper side (surface layer side) of the pool it is possible to store cold or warm water suitable for each use in the pool. A pump can be used for adjustment, or it can also be by natural drainage. For the adjustment pump, suction ports are provided at the top and bottom of the pool, and the suction ports are separated for use. In the case of natural drainage, overflow from the water discharge port provided on the upper side allows warm water to flow out, and a water discharge port can be provided below the side of the pool to discharge cold water. The lower water discharge port is provided with a control valve and can be controlled manually or automatically. In addition, if there are restrictions on the use of groundwater depending on the region, measure the discharge volume and control it to be within the limit. Or, install a measuring device for the pumping volume on the pumping pump side and control it within the limit. The pumping volume can also be controlled by managing the operating time of the pump. By managing the cumulative operating time with a timer, the operation of the pumping pump can be restricted to keep the pumping volume within the allowable range.

[0014] By providing the pool adjacent to the building, it becomes difficult to enter the building through the pool, so it is also useful for anti-theft design. By forming a non-stagnant water flow from the well side that pumps up groundwater to the outflow side where the pool water is discharged, accumulation of fallen leaves and algae can be prevented and the pool can be kept clean. The formation of the water flow is for example, in the shape of a triangle, with water outlets provided at the corners and water inlets from the well provided at the opposite side parts to provide a water flow with an increasing flow rate towards the water outlet. Also, the water supply from the well ​​​​​​By using a water supply pipe provided with a plurality of water supply holes, the water flow can be controlled. This can be done. In addition, fish such as carp and goldfish, and aquatic plants such as lotus and floating plants can be provided in the pond to add a hydrophilic effect. This can also be done.

[0015] The solar power generation panel 4 is installed in an empty space such as the rooftop of the building 61. The electricity generated by sunlight is used at least to drive the pumping pump 11. The pumping pump 11 can be driven at any time according to the power generation. When the water 31 in the storage pond overflows, it may be reduced underground through the groundwater infiltration step 2. In addition, a water storage amount sensor can be provided in the storage pond 3 to control the driving of the pumping pump 11 so as not to take more water than necessary. The driving of the pumping pump of the present invention is based on self - generated solar power, so it is independent and can be driven even in an emergency. This can be done. When the water in the storage pond overflows, it may be reduced underground through the groundwater infiltration step 2. In addition, a water storage amount sensor can be provided in the storage pond 3 to control the driving of the pumping pump 11 so as not to take more water than necessary. This can be done. The driving of the pumping pump of the present invention is based on self - generated solar power for home use, so it is independent and can be driven even in an emergency. This can be done.

[0016] The heat exchanger 5 can use a heat pipe, a heat pump, a heat collection pipe, etc. Many heat exchange means have been proposed. This can be done.

[0017] The building interior heating and cooling equipment 6 is equipment that supplies cold heat and warm heat obtained through the heat exchanger 5 into the building 61. For heat dissipation indoors, an air conditioner or a heat dissipation plate can be used. In the example of FIG. 1, the partition panel 7 is used as the heat dissipation plate. By dissipating heat from the partition panel 7 with a built - in pipe for circulating the heat medium, a soft heat environment can be created throughout. This can be done. In the example of FIG. 1, the partition panel 7 is used as the heat dissipation plate. By dissipating heat from the partition panel 7 with a built - in pipe for circulating the heat medium, a soft heat environment can be created throughout. This can be done. In addition, on the partition panel, convex ribs can be arranged in parallel, or a large number of grooves can be formed to make the surface uneven, so as to ensure a heat dissipation space without furniture adhering to the panel. This can be done. This can be done.

[0018] The groundwater infiltration means 2 is a means for returning the water 31 in the heat-exchanged storage pond to the ground. For example , there are wells for reduction, infiltration basins, permeable pavements, etc. Part of it can be used for watering the garden, etc., and can also be used for the water pumping effect in summer and snow melting in winter. By installing a biotope and watering, the neighboring residents can be made to recognize the utilization of groundwater in daily life, and it can be expected to be utilized as an emergency water source.

[0019] The present invention is a heating and cooling system that uses a shallow groundwater source suitable for Japanese residential areas as a heat source . Since it utilizes solar power generation as the pumping energy, it can operate independently and does not require commercial power, so it is energy-saving. The imbalance between the supply of groundwater by a pumping pump driven by unstable solar power generation and the heat demand of the building can be adjusted by providing a storage pond . The storage pond provided on the ground has water near the ground surface, so that it can be used for urban greening, fire fighting water during disaster prevention, and disaster prevention utilization as domestic water. Therefore, the incentive for introduction is high, and it is expected to spread as a social infrastructure . For the European and American type of geothermal utilization where the heat extraction pipes are laid about 100 m deep underground, it is easy to install at low cost in areas where uniform and hard strata are distributed. However, in complex strata such as in Japan, the cost of excavating heat extraction wells is high and it does not spread. The present invention can extract shallow groundwater and use the water stored in the surface storage pond for heat extraction, so it can be installed and operated at low cost . In the central part of Tokyo, it is possible to extract 10 to 20 m 3 of groundwater per day. By using this for heating and cooling , a significant reduction in carbon dioxide can be achieved. The groundwater after use is returned to the ground from permeable asphalt, etc., without imposing a load on the sewage . The present invention secures the driving power source of the pump from solar power generation within the building site, extracts groundwater, and reduces it, so it is a self - contained type that does not impose a burden on others, and can contribute to the neighborhood's emergency water source or power source.

[0020] An example of the heat - dissipation panel A is shown in FIG. 2. The partition panel 7 is installed between the floor 62 and the ceiling 63 of the building so as to partition the left and right rooms R1 and R2. This partition panel 7 has a main body portion made of a PC (precast concrete) panel or cast - in - place concrete. . In the present invention, a heat - insulating material 76 is interposed in the center of the partition panel 7, and cold - hot water pipes (pipes) 72 for circulating cold water or hot water are embedded to form a partition panel 7 for radiant heating and cooling. As an example of the partition, in a PC panel with a width W of 2,000 mm and a height H of 2,000 mm, when about 27 m of a cross - linked polyethylene pipe with an inner diameter of 7 mm and an outer diameter of 10 mm is piped as the cold - hot water pipe 72 and a wire mesh formed by a wire with a diameter of 6 mm is reinforced, the thickness of the panel can be 90 mm. In this case, the concrete thickness (the thickness of the pipe covering on the surface side) between the cold - hot water pipe 72 and the surface and the concrete thickness (the thickness of the pipe covering on the back side) between the cold - hot water pipe 72 and the back surface are both 40 mm. And in an environment with a room temperature of 26 °C, when 13 °C cold water is circulated through the cold - hot water pipe 72 of this panel at a flow rate of 2.5 (l / min), the heat - dissipation amount from both sides is 360 (kcal / h), the surface 7a of the room R1 is 18. 8 - 19.5 °C, and the surface 7b on the side of the room R2 is 19.5 - 20.0 °C. Since the heat insulating material 76 is provided at the center, the cold and hot water pipes 72 can be provided on only one side.

[0021] According to the partition panel 7 for radiant heating and cooling having the above configuration, separate systems of cold and hot water pipes 72a and 72b are provided on both sides of the panel, and by passing cold water or hot water separately, the front surface 7a and the back surface 7b of the panel radiate heat or absorb heat individually. As a result, the rooms R1 and R2 can be adjusted to different temperatures from each other.

[0022] From the viewpoint of preventing the occurrence of dew condensation during the cold radiation operation, the front surface 7a of the panel shown in FIG. 2 is provided with an uneven shape. When the front surface 7a of the panel is in surface contact with furniture or the like during the cold radiation operation of the panel, dew condensation may occur on the contact surface. In this regard, since the front surface 7a is provided with an uneven shape such as ribs or corrugations, a gap is formed between the panel and furniture or the like, and an air flow is generated in the air existing between the PC panel surface and the back surface of the furniture to eliminate the air stagnation, thereby preventing the occurrence of dew condensation. Further, by making the front surface 7a into an uneven shape, the heat exchange area is increased. In particular, when used in combination with an air conditioner, heat transfer due to the air flow in the vicinity of the front surface 7a makes it possible to increase the heating and cooling effect.

[0023] FIG. 3 shows an example of a heat dissipation panel B in which convex ribs are provided on the panel surface at intervals. (a) Plan view, (b) Cross section, (c) Pipe diagram, (d) Enlarged cross section are shown. The illustrated heat dissipation panel B is configured to have a size similar to that of other wall panels so that it can be used in a mixed manner. For example, it has a height from the floor to the ceiling (about 2500 mm), a width of about 1800 mm similar to that of a normal standard wall panel, and a thickness of about 120 mm. ​​The heat dissipation panel B is a precast concrete slab (PC slab). A cold and warm water pipe 82 is located at the center, and welded wire meshes 86 are arranged on both sides thereof, and concrete 81 is filled and hardened so as to embed them. A large number of convex ribs 83 are horizontally provided on the concrete surface 8a. The rib 83 is attached to the concrete surface by a rib foot (such as a screw) 83b with a rib head 83a which is an elongated material as a spot attachment material. In the illustrated example, six rib feet 83b are provided in one row. For example, the rib head 83a has a width of 25 mm , a thickness of 20 mm, and the rib foot 83b is 20 mm. Therefore, even if furniture or the like is pressed against the wall, it will abut against the rib head 83a, creating a space, and air can flow up and down through the 20 mm gap of the rib foot 83b. In addition, when the heat dissipation panel is formed of cast-in-place concrete on site, convex ribs can be retrofitted in the same way as the heat dissipation panel B.

[0024] The arrangement of the cold and warm water pipe 82 in the panel is arranged in a meandering pattern as shown in Fig. (c), and is provided in parallel so as to be continuous from the entrance 82a shown at the upper corner to the exit 82b. The size and material of the pipe are the same as those used for the heat dissipation panel A.

Example

[0025] This is an example of a building with a floor area of about 100 m in the eastern area of the central ward of Tokyo. The building layout diagram is shown in Fig. 4. 2 It is a semicircular five-story building on a substantially rectangular site. The facilities related to geothermal utilization are as follows. Storage tank: 24 m 2 , water storage capacity 13 m 3 Pumping well: depth 20 m Water pump: Horizontal pump for deep well Heat exchanger Solar power generation panel (installed on the roof) Radiant heat dissipation panel: Panel described in Figure 2

[0026] Figure 4 shows the first-floor plan layout diagram. A water storage tank 3 is provided northwest of the fan-shaped building 61, and an island 32 is provided in the central part. A water pump is installed at the lower part of the pumping well 1 and the well The east end and the south end of the water storage tank 3 are provided with water discharge ports 34 that allow the water in the tank to overflow The west, north, and northeast of the site are paved with permeable asphalt 21, and the surrounding of the building is a water storage tank and permeable Paving. The entrances from the external road and around the entrance are paved normally. The heat exchanger 5 is installed at the southwest end of the building 61. The installation location of this heat exchanger is not Restricted and is arbitrary. The building 61 is a five-story building. Four living rooms are provided on the first floor, and radiant cold Heating partition panels 7 are adopted for the partition walls between the living rooms. In this example, in the part where some are structural walls Radiant heating and cooling partition panels are not used.

[0027] Since the water storage tank 3 is formed in contact with the living rooms 2, 3, and 4 on the first floor, the water surface can be seen from the windows 64 of each living room And a hydrophilic feeling and a sense of openness can be given. Also, since it faces the pond It is difficult to break in through the window, and the pond plays a security function. Generally, the price of the first-floor living Rooms is evaluated at a relatively low level, but due to such effects, the value of the residential unit can be increased

[0028] Figure 5 schematically shows the north-south cross-section passing through the island 32 provided in the water storage tank 3. A pumping well 1 is provided on the island 32 provided in the water storage tank 3, and a water pump 11 is installed on the pumping pipe ​​There is. The driving source of the pumping pump is the electric power generated by the solar power generation panel installed on the rooftop of the building. is used. The storage pond 3 is surrounded by a pond wall 33, and the pond wall 33 is composed of concrete 33b with a heat insulation layer 33a formed of a heat insulating material such as polystyrene foam material wound around the outside, suppressing the change in water temperature. The depth of the pumping well is set to a water vein where sufficient water volume can be secured. The groundwater level in this area is high , and the pumping volume is specified as 10 m 3 / day, so the depth of the well is set with reference to a water vein that can secure the water volume of this specified value. Inside the pond, a heat collection pipe 51 is wound. The heat medium is sent from the heat collection pipe 51 to the heat exchanger, heat-exchanged, and supplied to a radiation heating / cooling partition panel or the like.

[0029] Fig. 6 shows the configuration of the water discharge port of the water overflowing from the storage pond. A water receiver 35 is provided below the water discharge port 34, and a water basin 36 is provided on the ground. A cold water discharge port 37 is provided below this discharge port. By providing a receiving net 38 in the water receiver 35 or the water basin 36, floating substances such as fallen leaves and floating algae can be received and removed, garbage can be removed from the overflow water, and the water spraying surface can be kept clean. The receiving net can also be provided at the cold water discharge port 37. The overflowed water becomes available in the water receiver 35 or the water basin 36, and the water flowing out from the water basin 36 spreads to the permeable asphalt pavement portion and is absorbed by the ground. A part of the water evaporates from the permeable asphalt pavement, exerts a watering effect, and moderates the surrounding temperature. Since the warm water on the surface side is discharged and relatively cold water remains in the pond, the cooling effect can be efficiently exerted. ​​​​​​​​​In the cold season, cold water is discharged from the cold water outlet 37 at the bottom of the pond, and relatively warm water remains in the pond, so that the heating effect can be efficiently exerted. Thus, the heating effect can be efficiently exerted.

[0030] Also, in this eastern area of Tokyo, it is allowed to pump up 10 m 3 / day of water volume. This storage pond is set to be able to replace the water in almost one day. The pumping pump measures the pumping-up volume and sets the upper limit at 10 m / day. Since the pumping-up volume is proportional to the operation time of the pump, it can be controlled by timer management that sets the upper limit of the operation time. That is, the pumping capacity of the pump per unit time (A m 3 / h) × cumulative operation time (X t) ≤ restricted water volume (Max m ), so the operation limit time (B t) = restricted water volume (Max m 3 ) / pumping capacity (A m / h) is set. Note that the timer can be arbitrarily set within the operation limit time (B t) to ensure the required pumping-up volume. 3 ) and the operation limit time (B t) = restricted water volume (Max m 3 ) / pumping capacity (A m / h) is set. In addition, the water discharge volume can be measured, the water discharge can be restricted, and the pumping pump side can also be controlled. 3 Moreover, the water discharge volume can be measured, the water discharge can be restricted, and the pumping pump side can be controlled. In addition, the water discharge volume can be measured, the water discharge can be restricted, and the pumping pump side can be controlled. Also, the water discharge volume can be measured to restrict the water discharge, and the pumping pump side can be controlled.

[0031] Fig. 7 shows an example of a storage pond with controlled water flow and an example of controlled water spraying. The shape of the storage pond shown in Fig. 7 uses the same one as the water storage shown in Fig. 4, but it goes without saying that it is not limited to this. In the illustrated example, the shape of the storage pond 3 is a substantially right-angled triangular shape with a right angle at the upper left of the illustration. The hypotenuse is curved inward along the outer shape of the building. In the storage pond 3, an island 32 with a pumping well 1 installed is arranged on the left hand side of the illustrated storage pond 3, and water discharge ports 34, 34b are provided at the acute angle portions. is curved inward along the outer shape of the building. In the storage pond 3, an island 32 with a pumping well 1 installed is arranged on the left hand side of the illustrated storage pond 3, and water discharge ports 34, 34b are provided at the acute angle portions. is arranged on the left side of the illustrated storage pond 3, and water discharge ports 34, 34b are provided at the acute angle portions. is provided. The state where the water overflowing from the water discharge ports 34 and 34b is diffused is simulated as the water diffusion 24 and 24b. On a midsummer day with an outside air temperature of 35 °C, the pumped-up groundwater temperature is 1 8 °C, the water surface temperature is 26 °C, the asphalt surface in the shade of trees is 41 °C, and the outside road surface (sunlit surface) is 60 °C, which have been measured and it has been confirmed that the temperature reduction effect by water spraying can be achieved. A water discharge pipe 22 with a large number of water discharge holes opened from the pumping well 1 is provided for water supply so that the water flow towards the water discharge ports 34 and 34 b can be formed over the entire surface of the pond. The water flow of the pond with floating substances such as fallen leaves and floating algae generated is controlled, and the overflow water is discharged from the water discharge ports 34 and 34b to keep the pond clean. And by providing receiving nets at the water discharge ports 34 and 34b, it is possible to prevent the water surface from being contaminated. Note that since the shape of the storage pond varies depending on the shape of the site and the building, a water discharge pipe is provided to control the water flow according to the shape of the storage pond and the position of the water discharge port. The water discharge pipe 22 is designed for its layout and water discharge holes according to the shape of the pond and the set water flow. In this example it extends to the short side of the storage pond 3 and is provided with a plurality of water discharge holes. Also, a water discharge pipe is provided at the back side of the island so that there is no stagnation at the back side of the island. Since clean groundwater is supplied by forming a non-stagnant water flow, the generation of bowfins and the growth of algae in summer can be suppressed. By planting lotuses and releasing fish, the charm is further enhanced. Fish are also effective in controlling bowfins.

[0032] The water diffusions 24 and 24b show the diffusion state of the water when it naturally overflows from the water discharge ports 34 and 34b. However, depending on the shape of the site and the climate, the water does not diffuse far enough There are cases. For example, in midsummer, it is desirable to spread far, but the evaporation of water is fast and it may dry up. In such a case, the water pipes 25 and 25b can be laid to reach the site far from the water outlet. The water pipes can use flexible tubes etc. The water pipes can also perform irrigation by passing near the planting. Also, in winter or cold regions, the scattered water may freeze and walking etc. may become dangerous. Therefore, a reduction hole 26 for returning unnecessary overflow water to the ground is provided, and the reduction pipe 26b is used to introduce water from the storage pond 3. The reduction hole does not need to reach the depth of the pumped water vein, and it is sufficient if it has sufficient permeability. To ensure permeability, the depth to a permeable stratum, and furthermore, a plurality of infiltration pipes can be buried from the reduction hole. The size of the reduction hole does not require a large diameter by providing a large number of water pipes. The reduction hole can be provided underground and does not limit the use of the site surface.

[0033] In the event of a disaster such as a large-scale earthquake, the pumping pump can be driven by independent solar power generation, groundwater can be pumped up, and water can be supplied to the surrounding residents using the water outlet etc. Also, the power of solar power generation can be supplied. The ground-source heat and solar power utilization cooling heating system shown in the embodiment also functions as a disaster-independent water supply system that stops heat exchange during water cut-off and supplies water for neighboring areas.

Explanation of symbols

[0034] 1: Pumping well 11: Pumping pump 2: Groundwater infiltration means 21: Permeable asphalt pavement 22: Drain pipe​​​ 23: Water flow 24, 24b: Water dispersion 25, 25b: Water pipes 26: Reduction hole 26b: Reduction pipe 3: Water storage tank 31: Water in the water storage tank 32: Island 33: Pond wall 33a: Heat insulation layer 33b: Concrete 34, 34b: Water outlet 35: Water receiver 36: Water basin 37: Cold water outlet 38: Receiving net 4: Solar power generation panel 5: Heat exchanger 51: Heat collection pipe 6: Building interior heating and cooling equipment 61: Building 62: Floor 63: Ceiling 64: Window 7: Radiation heating and cooling partition panel A (heat dissipation panel A) 7a, 7b: Surface 72: Pipe 72a, 72b: Cold and warm water pipes 76: Heat insulation material 8: Radiation heating and cooling partition panel B (heat dissipation panel B) 8a: Surface 81: Concrete 82: Cold and warm water pipes 82a: Entrance 82b: Exit 83: Rib 83a: Rib head 83b: Rib foot 84: Space between ribs 85: Air flow path 86: Welded wire mesh 10: Ground source heat and solar energy utilization heating and cooling system P: Pump W: Water vein R1: Room R2: Room

Claims

1. The facility is equipped with a groundwater pumping well, a groundwater infiltration means, a reservoir, a heat exchanger, and heating and cooling equipment for the building; The reservoir is a pond at least a part of which is exposed to the ground and has a water outlet provided above ground; The building's heating and cooling system is equipped with radiant heating and cooling partition panels. A geothermal heating and cooling system that operates a water pump to pump up groundwater and supply it to a reservoir, uses a heat exchanger to convert the heat of the water in the reservoir into heat for heating and cooling in buildings, and returns any water that overflows from the reservoir back into the ground.

2. The partition panel for radiant heating and cooling has a piping for carrying a heat exchange medium embedded inside the PC panel constituting the panel body, and has an uneven surface on the PC panel.

2. A geothermal heating and cooling system according to claim 1, wherein the uneven spaces form air passages.

3. 3. A geothermal heating and cooling system according to claim 1, wherein the groundwater pumping well draws water from a water vein having a groundwater flow rate equal to or greater than the regulated amount of water that can be pumped.

4. 4. A geothermal heating and cooling system according to claim 1, wherein the reservoir has a water outlet at a position accessible from an external road.

5. A geothermal heating and cooling system as described in any one of claims 1 to 4, characterized in that a heat collection pipe is installed in the reservoir and a heat medium is sent from the heat collection pipe to a heat exchanger.

6. 6. A geothermal heating and cooling system according to claim 1, wherein the reservoir is provided adjacent to a room on the first floor.

7. 7. A geothermal heating and cooling system according to claim 1, wherein the amount of water taken is controlled to be equal to or less than a regulated amount of water to be pumped by integrating the operating time of the water pump.

8. 8. An independent disaster water supply system comprising a geothermal heating and cooling system according to claim 1, which stops heat exchange during a water outage and supplies water to a neighboring area.

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