JP4600680B2 - Water supply system - Google Patents

Description

The present invention is intended for groundwater that has little change in water temperature throughout the year and is capable of utilizing effective isothermal properties. In a typical example, groundwater staying at a depth of 100 m or more is pumped and filtered. It relates to a system that realizes the water quality suitable for the purpose of use.
For example, by utilizing the constant temperature and water quality of the groundwater, we will pursue the benefits to prevent pollution, save resources, save energy, and control carbon dioxide.

Conventionally, a circulating cooling water system using a cooling tower is often employed as a cooling system for a water-cooled air conditioner, particularly a cooling / hot water generator that is widely used. Certainly, it is excellent in the effective use of water resources in that only the supply of makeup water is used to adopt the circulation method, but the cooling water temperature is in the growth zone of Legionella spp. And has a basic problem.
That is, under the present circumstances, sprayed water droplets (aerosol) are diffused into the atmosphere through the cooling tower in a state containing Legionella spp., And there is a great risk of causing infections. As countermeasures, Legionella genus eradication measures are implemented by injecting chemicals into cooling water, sterilization by irradiation of magnetic field lines, ozone sterilization, and the like.

However, the optimal growth temperature of Legionella spp. Is around 36 ° C., and these fungi use the metabolites of algae and other bacteria or infest with protozoa. Recognize that it is important to block the symbiotic relationship.
In other words, Legionella spp. Live in various environmental conditions in cooling water and cause concentration by releasing the cooling water into the atmosphere. Especially in summer, the generation of algae and protozoa due to rising water temperature is accelerated. Move to an environment suitable for growth.
As described above, it is considered that the generation and growth of Legionella spp. In cooling water are influenced by temperature, microbial symbiosis, and concentration conditions.

The optimum temperature for the growth of Legionella spp. Is around 36 ° C., but it can grow sufficiently within the range of 25-43 ° C. and does not die even at −80 ° C. under freezing. In particular, Legionella spp. In the cooling tower water survive throughout the year at 4 to 5 ° C., but do not grow at low temperatures, but the environment changes to an appropriate temperature and begins to grow.
Moreover, it will die within 5 seconds if it comes into direct contact with 70 ° C. hot water, and within 15 minutes if it comes into contact with 60 ° C. hot water or 0.4 ppm free residual chlorine. On the other hand, Legionella spp. Itself can be sterilized with ultraviolet light in clean water, but it is said to recover by receiving visible light thereafter.

From the above reports, it is very difficult to eradicate Legionella spp., And there is a potential situation where no matter where and when an infection develops.
Therefore, it is assumed that there are no radical measures other than creating an environment that can prevent the Legionella spp. Although the government has announced guidelines for measures to prevent infectious diseases, at present, risk aversion is still insufficient.
In order to escape from such a situation, improvement of the cooling system, which is the starting point of the problem, is desired, and attention is paid to the use of natural thermostatic properties existing below the ground surface as a cooling means.
For example, a cooling / heating system using the temperature of underground air and groundwater (for example, see Patent Document 1), a cooling / heating device (see Patent Document 2) that directly uses groundwater at a constant temperature throughout the year, drinking water for general households, There have been reports of provision of a total housing system (see Patent Document 3) that uses groundwater to the maximum extent for other domestic miscellaneous water and air conditioning.

  JP 2003-247731 A   JP 2003-90630 A   JP2002-146852

From this perspective, various countermeasures have been devised based on the recognition that the generation and growth of Legionella spp. Is inevitable with the current cooling water circulation system using a cooling tower, but it has not yet been eradicated. It is.
The inventors of the present invention have taken into account the utilization of the underground constant temperature environment that exists in nature as a means of energy and resource saving, switched from the conventional cooling tower method to the direct cooling method, blocking the path of generation of Legionella and water The aim was to achieve the intended objectives in terms of effective use of resources.
As a result, it was an issue that the suppression of Legionella spp. In the air and that the effect of the subsurface isothermal environment could be achieved by effectively using the groundwater as a heat exchange medium.

With the aim of eradicating Legionella spp., We focused our efforts on technology development to abolish the conventional cooling tower system, focusing on the effective intervention of groundwater as a medium that directly reflects the thermostatic properties of the underground.
As a result, a water flow circuit including a groundwater heat storage tank having a cooling water piping system as a closed pipe is adopted, and a system for utilizing medium water again as intermediate water or drinking water by advanced water treatment means after heat exchange is completed and the present invention is completed. It came.

That is, the gist of the present invention is that a deep well (D) excavated to a geological zone having groundwater that maintains a permanent temperature, a regenerative water tank (B) that is an underground concrete tank, and a groundwater tank (A) and an absorption-type cold / hot water generator (C), and the thermal storage tank (B) and the underground water tank (A) are selectively communicated via a communication pipe (L13), In the regenerative water tank (B), the groundwater is directly stored, and the water stored in the regenerative water tank (B) is used as the condenser cooling water of the absorption cold / hot water generator (C), or After using the heat storage energy of the water stored in the heat storage water tank (B) as a heat source for the heat exchanger of the absorption cold / hot water generator (C), the ground water tank (A) and the heat storage water tank (B) provided with a pipe (L11) for selective storage into the groundwater tank The former or both of the water stored in A) and the thermal storage water tank (B), in the water supply system, characterized in that it comprises a means for utilizing the water.
Here, as means for utilizing as the irrigation water, a raw water pump (P2) for pumping water stored in the groundwater tank (A) to the filtration tower (A) and the filtration tower (I) An intermediate treated water tank (T1) for storing pretreated filtered water, and a middle water pumping pump (T4) for storing the filtered water in the intermediate treated water tank (T1) in an intermediate water elevated tank (T4) P3) and a middle water pumping pipe (L4), and a middle water supply pipe (L5) for supplying the filtered water in the middle water elevated water tank (T4) to each middle water use facility, To do.
Further, as means for utilizing the water, the raw water pump (P2) for pumping the water stored in the groundwater tank (A) to the filtration tower (A) and the filtration tower (A) An intermediate water tank (T1) for storing the treated filtered water, and an intermediate water pump (P4) for pumping the filtrate water stored in the intermediate water tank (T1) to the membrane filtration device (b) The treated water water pipe (L12) for storing treated water highly treated by the membrane filtration device (b) in the treated water tank (T2) and treated water in the treated water tank (T2) The treated water pump (P5) and the treated water pipe (L6) for storing in T3) and the treated water pump (P5) for storing the treated water in the water receiving tank (T3) in the elevated water tank (T5) P7) and the water pumping pipe (L2) and the treatment in the water elevated tank (T5) And it is intended to include a water supply pipe (L3) for supplying to each faucet.
As a cooling water piping system related to the absorption cold / hot water generator (C), the cooling water forward pipe (L10) and the cooling water return pipe (L11) are all closed piping systems and have no contact with the atmosphere, In addition, the water stored in the regenerative water tank (B) is temporarily transferred to the absorption cold / hot water generator (C) by the cooling water pump (P6) of the cooling water forward pipe (L10). By doing so, the system can be pursued for further improvement in efficiency.

Here, the groundwater that can utilize the effective isothermal property is intended for groundwater whose change in water temperature is small throughout the year, and a typical example is a deep well of about 100 m in the underground depth. This level of groundwater changes within a range of 13 to 18 ° C. throughout the year, and is suitable as a utilization medium of latent heat energy that is a subject of the present invention.
In addition, the heat storage type underground water tank used in the present invention is a water tank set up with a structure capable of preventing heat transfer by contact with heat insulation, and can be achieved, for example, by incorporating a multiple structure sandwiching a space as a partition wall.

Absorption type cold / hot water generator is a double-effect absorption type refrigerator, which uses gas as energy source, steam and high-temperature water generated by gas combustion, refrigerant as water, and absorption liquid as odor. An aqueous lithium fluoride solution is used. Since cold water and hot water can be taken out simultaneously or separately and the pressure in the high-temperature regenerator is below atmospheric pressure, the relevant laws and regulations are not applied. Compared to other refrigerators, there is no large motor, vibration and noise are small, and power is low.
The heat storage energy of the groundwater stored in the regenerative groundwater tank can be used as cooling water in the condenser / absorber of the absorption cold / hot water generator or as a heat source for the cooling water heat exchanger.

The utilization method of the latent heat energy in the groundwater area can be applied to all the enthalpies of the pumped groundwater and the utilization of latent heat energy inside the infinitely variable water area.
For example, it is possible to utilize a change in temperature that is natural energy due to a change in environmental conditions, a change in soil temperature due to underground depth, and the like.

INDUSTRIAL APPLICABILITY The present invention is a useful invention that has achieved resource saving and legionella eradication measures by effectively utilizing infinite underground thermostat, which has not been focused on conventionally, as enthalpy through groundwater. Specifically, the groundwater is in a cooling system including an efficient water flow circuit.
For example, if the cooling water inlet temperature in the cooling water volume is 32 ° C by the normal cooling tower system and 20 ° C by the groundwater system, the cooling water volume is normal and the cooling water volume is normal by using an absorption refrigerator having a capacity of 100 USRT. In order to set the water temperature to 32 ° C., a water amount of 15 L / min / ton to 13 L / min / ton is required. However, if the groundwater at 20 ° C. is used as the cooling water when the groundwater is directly used, it can be assumed that it is 9 L / min / ton to 7 L / min / ton, and the total amount of cooling water is 80% compared to the cooling tower method. 70% reduction.

As an effect on the equipment function by the countermeasure against the eradication of Legionella spp., It can be expected to greatly reduce the cause of the pipe closure of the cooling water system, which has been feared to occur. As a result, if the cooling tower can be dispensed with as a result, the temperature of the cooling water drops to around 20 ° C. as a result of the effects on the habitat of these fungi themselves, and the contact with the atmosphere can be cut off. Therefore, Legionella genus fungus itself can be disabled.
The amount of carbon dioxide (C02) generated to produce 1m3 of tap water in the situation where suppression of greenhouse gases such as carbon dioxide (CO2) causing global warming is called out The quantity is shown as 0.6 kg / m3.
On the other hand, the results of producing the amount of carbon dioxide (CO2) generated at the stage of conversion to a dedicated water supply using advanced groundwater using groundwater, which is a self-water source, were compared and examined as follows. Is specifically shown.

Carbon dioxide (CO2) emissions from the construction and operation of a dedicated water supply using groundwater are the fuel used for drilling deep wells, materials for well piping, and plant installation equipment for this system at the construction and installation stages. The fuel used for transportation and installation of materials, materials and equipment was estimated.
That is, the total carbon dioxide emissions at the construction and installation stages were 0.004885 kg / m3 when using vinyl chloride pipes. Next, in the trial calculation for the operation stage, the emission amount of carbon dioxide (CO2) derived from the use of electric power was a numerical value of 0.305 kg / m3. The general classification values are specified below.
15 m3 / H treatment plant (2,628,000 m3 / 30Y) = The service life was set to 30 years.

From the above, the total amount of carbon dioxide (CO2) generation shown in "Table 1" and "Table 2" was 0.309985 kg / m3. This figure was a 48.5% reduction rate relative to the value of tap water.
In the current drinking water supply system, since there are processes such as river water filtration and water distribution from the basic production process of clean water, the emission of CO2 due to the consumption of electric power inevitably tends to increase.
However, as proposed in the present invention, by adopting groundwater as part of the generation of clean water and intermediate water, the amount of cooling water compared to the amount of CO2 emitted when using the clean water generated from the river in its entirety is used. As a result, it is possible to reduce CO2 emissions by about 20% by using groundwater from its own water source.

Furthermore, in the present situation where each customer exists on the extension of the distribution pipe in the water supply business as part of public works, there is a great concern that the distribution pipe will be severed once a disaster is encountered.
Due to such an unexpected water-stopping phenomenon, it is possible to easily confirm a situation in which the function as a lifeline is lost and the life support activity is greatly affected.
The utilization of groundwater as a self-water source according to the present invention can be an extremely effective means for water supply for an emergency lifeline in the event of a disaster.
The following examples further illustrate the present invention.

An embodiment of the present invention will be described with reference to FIG.
The deep well (D) in Fig. 1 was excavated within the administrative limits of the government. The excavation depth is 120m, and it is groundwater that is not affected by sewage from the surface by passing through two impermeable layers. is there.
The groundwater in the geological zone at a depth of 120 m is maintained at a permanent temperature and an average water temperature of 18 ° C. throughout the year.
In addition, by pumping water within the scope of administrative regulations, we will maintain a balance with natural recharge and promote symbiosis with the environment. In addition, the well water pumped up by the well water pump (P1) is stored in the well water heat storage tank (B) through the well water pumping pipe (L1).

The absorption-type cold / hot water generator (C) in FIG. 1 has a capacity of 100 USRT, and the cooling water amount is 1.65 m 3 / min (when the cold water outlet temperature is 8 ° C.). The cooling water inlet temperature is 31 ° C.).
However, if the cooling water inlet temperature is set to 20 ° C. by supplying well water, the amount of cooling water can be reduced by 40% in the above case.
The cooling water forward pipe as pipe system for cooling water (L10), the cooling water instead of pipe (L11) and all closed piping system and none contact with the atmosphere or the like, and, well water heat storage layer (B) ( "heat storage wherein the water tank "at" cooling water pump (P6 of cooling water往管 cooling water stored in the referred to also as ground water heat storage layer ") as a once-through (L10)), the absorption chiller generator to (C) It becomes a system that can pursue further efficiency improvement by pumping.

The groundwater heat storage tank (B) in FIG. 1 is an underground concrete tank, and the inner surface is filled with a heat insulating material for the heat storage tank. Thereby, the thermal energy which groundwater has can be hold | maintained, a heat change rate can be suppressed within 10%, and groundwater temperature can be hold | maintained at 20 degreeC. The capacity of the groundwater heat storage tank (B) was 800 m3, and 10 hours of the required amount of cooling water could be secured.
The operating time per day of the cold / hot water generator is set to 1.15 m3 / min in consideration of the fact that the amount of cooling water can be reduced by 30%, and the amount of cooling water is set to 552 m3 / day on the assumption of 8-hour operation. It was. The groundwater pumping amount was set to be replenished at any time at 500 L / min.
The operation of the groundwater pump (P1) is 390m3 / day for 13 hours per day for normal operation in the summer, and 13 hours per day for 500L / min. 50% can be secured. In addition, if the communication pipe (L13) provided between the water tanks is opened and integrated in preparation for the winter, the water quality can be maintained.

The ground water tank (A) in FIG. 1 shows the water tank which stores the raw water which manufactures clean water and middle water. The capacity of the groundwater tank (A) is 300m3, and the cooling water outlet of the absorption-type cold / hot water generator (C) is introduced into the groundwater tank (A) during cooling in the summer, and the cooling water return pipe with the operating cooling water as raw water Store through (L11). In winter, the groundwater stored in the groundwater heat storage tank (B) is transferred to the groundwater tank (A) through the communication pipe (L13). In addition, the raw water was classified into three types, and it was assumed that water quality control could be performed while conducting water quality analysis of the well raw water, groundwater heat storage tank water, groundwater tank water and each tank regularly and every season.
That is, the groundwater once used as cooling water is stored in the groundwater tank (A), which is used as raw water to be filtered water with a processing capacity of 8 m3 / H, and similarly filtered through a filtering apparatus with a processing capacity of 7 m3 / H. In this case, the water was used as an apparatus capable of generating a total of 15 m 3 / H of treated water according to the purpose of use.

In the groundwater advanced treatment plant installed in the upper part of the underground water tank (A) in FIG. 1, it is possible to generate clean water and medium water. That is, the intermediate water is directly pumped to the intermediate water elevated tank (T4) through the intermediate water pumping pipe (L4), and thereafter supplied to each instrument by the gravity method through the intermediate water supply pipe (L5). The water was introduced into the water receiving tank (T3) and set so that it could be mixed with city water (E).
Well-treated water for well water is drinking water in accordance with the Water Supply Law. Pumped water is supplied to the elevated water tank (T5) via the water pumping pipe (L2), and the water supply pipe (L3) is connected by gravity. After that, it can be supplied to each device as drinking water.
In addition, the water receiving tank (T3) secured 100% water supply as a backup for clean water through a city water intake pipe (d) branched from the water supply main.

By utilizing the setting shown in FIG. 1, a deep well with a depth of 120 m was excavated, and groundwater was pumped from this. As a result of the pumping test, it was possible to secure a groundwater pumping amount of 500 L / min. As a result of water quality analysis of the raw water, it was found that iron 1.23 mg / L, manganese 0.066 mg / L, chromaticity 7 and turbidity 2.1, which did not satisfy the standards of drinking water by the Waterworks Law. It was confirmed that the water quality for air conditioning did not clear the standard value with a hardness of 92 mg / L.
Assuming summer, the outside air temperature is set to 36 ° C, the groundwater temperature is set to 18 ° C, and when this groundwater is stored in the groundwater storage tank (B), which is a regenerative well, the heat loss in the groundwater storage tank is zero. It was confirmed that the water temperature of 19.6 ° C was secured throughout the day at 8%, and that the constant temperature of the groundwater could be used with high efficiency.

In order to maintain the thermal energy of the pumped-up groundwater, that is, the water temperature, a concrete formwork method utilizing a heat insulating material function was adopted. That is, a panel made of polystyrene foam (a block shape of dimensions 1,000 mm x 250 mm x 10 mm) as a concrete formwork, is used as a heat insulating material without removing it after placing the concrete, and the surface is a heat storage tank by coating film waterproofing Built. Spray coating of solventless urethane resin was adopted as a waterproof coating material.
As a result, it was possible to secure a heat storage rate of 92% against the target of 95%.
In order to apply this system to a hospital building with a floor area of 2,580m2 on the 4th floor above ground and 1st floor below, the cooling load is calculated as 278,500Kcal / H and the absorption cold / hot water generator (C) Set the capacity to 100 USRT. The amount of cooling water in the absorption cold / hot water generator was standard, and a standard of about 8 L / min / ton was adopted when the groundwater temperature used was 18 ° C.
Therefore, the amount of cooling water of this device was set to about 800 L / min, a one-time system was adopted, and pumped to the cold / hot water generator (C) by the cooling water pump (P6).

In this experiment, low-temperature (19.6 ° C.) cooling water was supplied to the 100 USRT absorption-type cold / hot water generator (C) in a transient manner, and the amount of cooling water was confirmed to be 8.7 L / min / ton. done.
That is, it was 870 L / min, and when the operation time was 8 hours, it was 417.6 m 3 / D. This figure was 33.8% reduction compared to the cooling tower method. The capacity of the well water storage tank (B) was able to confirm the result of storing about 15 hours for 800m3, and was able to cope with resource saving and energy saving.
If 50% of the capacity of the well water storage tank (B) is to be replenished, the well water pumping capacity will be supplied at 280 L / min for 24 hours operation, confirming that the system can be operated. The amount of pumped water was reduced.
However, considering the maintenance of heat storage efficiency and the safety factor of capacity, it was decided to reduce it to 30% of the total capacity, and the constant storage amount of the well water heat storage tank (B) was set to 560 m 3. The well water yield was 450 L / min after 20 hours of operation.

When groundwater is used, it is considered that the influence on the air conditioner becomes great, and there is a concern that the scale is deposited in that the hardness is higher than the quality of tap water. In consideration of this concern, the results of confirming the effect of rust removal and rust prevention of air conditioners, pipes, etc. in order to keep the hardness standard of supplementary water for air conditioning at 70 mg / L or less are shown below.
From Fig. 1, a magnetic field irradiator (c) is installed in each pipe of the intermediate water pumping pipe (L4), treated water pipe (L6), and cooling water outgoing pipe (L10) to confirm the scale prevention effect by electromagnetic force. did. The results are shown in Table 3 below.

From the results shown in Table 3, the water quality was reduced to a level below the standard that allows the use of air-conditioning for air conditioning. In addition, the iron content that greatly affects rust removal and rust prevention passes through the filtration tower (b) for both the middle water pumping pipe system and the treated water pipe system. The water quality could be suitable for drinking water.
Therefore, as a result of X-ray analysis, it was confirmed that the state of FeO initially changed to Fe3O4 (magnetite) after 6 months.
Therefore, the effects of rust removal and rust prevention of pipes, heat exchangers, etc. are exerted remarkably, and from the viewpoint of chemical injection, water treatment, cleaning, maintenance, preventive maintenance, etc., from the environmental viewpoint. It was evaluated that a system that did not require complicated special management maintenance could be established.
In all, the original Legionella genus has been shown to be naturally suppressed by a decrease in the cooling water temperature, but it has been confirmed that the effect of inhibiting the bacteria by electromagnetics can be exerted.

The constant temperature groundwater stored in the groundwater heat storage tank (B) with the setting shown in Fig. 1 is used as cooling water for the absorption cold / hot water generator (C), and then stored again in the groundwater tank (A) without being discarded. It was used as raw water for various types of water.
Assuming that there is no change in the quality of raw water in terms of water quality, city water drops to about 5 ° C in the winter, so the raw water temperature was adjusted to 17.8 ° C. Even at this temperature, the difference is largely maintained, and the heat loss of the well tank may be estimated to about 0.6 ° C. Hereinafter, the experiment was continued under these conditions.
In addition, a communication pipe (L13) is provided in the partition wall between the well-water heat storage tank (B) and the well-water tank (A), a device for maintaining a constant water level and water temperature is laid, and the well-water pump (P1) Operation was controlled automatically.
Moreover, the capacity of the groundwater tank (A) was set to 300 m3, and the required water supply amount was 8 m3 / H for clean water, 7 m3 / H for middle water, and a total of 15 m3 / H for one day could be determined. As a result, it became possible to secure stable raw water.

300 m3 of raw water stored in the groundwater tank (A) based on FIG. 1 was pumped to the filtration tower (I) with a raw water pump (P2) (50 × 40) × 15 m3 / H × 25 mH × 2.2 kW. The pumped raw water removed so-called gold, such as iron and manganese, generally contained in the groundwater by a filtration tower.
Further, the filtration tower played a role of pretreatment for reducing the membrane filtration load in the subsequent stage even when iron and manganese in the raw water were below the standard values and both chromaticity and turbidity were suitable for beverages.
In addition, in order to improve the efficiency of the filtration tower and to exhibit its ability, sodium hypochlorite having a role of sterilization was injected into the raw water supply pipe (L7). The sodium hypochlorite tank was set to 300 L, and the capacity of the chemical injection pump was 2 units of 16 ml / min × 0.98 MPa × 16 W. The injection amount was set so that 0.1 mg / L of residual chlorine (free) determined by the Waterworks Law could be secured at the water tap end tap.

From FIG. 1, the filtered water pretreated in the filtration tower (A) was stored in the intermediate treated water tank (T1). Thereafter, the filtered water in the intermediate treated water tank can be used for the quality of the medium water, and it was stored in the medium water elevated tank through the medium water pumping pipe (L4) by the medium water pump ( P3 ). After that, the water was supplied to each facility for use of intermediate water through the intermediate water supply pipe (L5) by gravity. The intermediate treatment water tank (T1) was 10 m3.
The pretreated filtered water was stored in the intermediate treatment water tank (T1), and then was pumped to the membrane filtration apparatus (b), which is a subsequent advanced treatment, by the intermediate water pump (P4). The treated water that was highly treated by the membrane filtration device was stored in the treated water tank (T2) via the treated water feed pipe (L12). The capacity of the treated water tank (T2) was 6 m3, and it was refined to a water quality equivalent to tap water in accordance with the Waterworks Law.
Thereafter, it was stored in the water receiving tank (T3) through the treated water pipe (L6) by the treated water pump ( P5 ). Receiving tank (T3) capacity is 80m3, stored in the elevated water tank (T5) via the upper water pumping pipe (L2) by the upper water pump (P7), and then from the upper water supply pipe by gravity. Supplied to each faucet.
In addition, as a backup function of the water supply, a water pipe (E) is provided so as to correspond to a supply amount of 100% of the water, and the water can be supplied via the water intake pipe (d).

The constant temperature storage energy of groundwater can greatly contribute to the reduction of the heat source of water heaters.
That is, the city water temperature in winter is an average of 5 ° C., and it can be considered that the energy efficiency is extremely reduced if the water is supplied to the water heater.
However, the method of the present invention is extremely advantageous because it can be assumed that the water temperature of the underground water tank can be maintained at an average of about 17.2 ° C. That is, as a result of comparing the hospital with the total hot water supply amount of 45,000 L / day and consuming the energy of the supplied water, it can be considered as follows.
As conditions, hot water supply temperature: 60 ° C., total hot water supply amount: 45,000 L / day, clean water temperature: 5 ° C., groundwater tank temperature: 17.2 ° C.
For clean water:
Heating capacity = 45,000 × 1/10 (60−5) = 247,500 kcal / H... A
For underground aquarium water:
Heating capacity = 45,000 × 1/10 (60−17.2) = 192,600 kcal / H... B
Reduction rate = B ÷ A = 0.75X100 = 75%
As a result of the above, we were able to confirm a 25% reduction in resource and energy savings by effectively utilizing the potential enthalpy of groundwater.

Of all the disasters, the greatest damage to the drinking water lifeline is said to be an earthquake disaster. Damage to the water main in recent earthquake disasters has been remarkable, and it has been the biggest obstacle to maintaining the life and health of affected people due to the difficulty of water cut and restoration.
The impact of this water outage became the main cause of losing human lives, starting with medical facilities. Especially in hospitals that are responsible for saving lives, fatal consequences have been produced.
Under such circumstances, it is obvious that by maintaining a self-water source using groundwater in addition to city water as in the present invention, life maintenance and business continuity can be secured if it is possible to secure a power source.
Furthermore, in the lessons learned from recent earthquakes, it was necessary to be aware of the importance of securing groundwater in the face of the fact that there was no report that well facilities were damaged and that water for life support could be supplied.

As described in detail above, the present invention effectively utilizes a portion of the enthalpy retained underground through a medium of groundwater, and further incorporates and subtracts it into a system for advanced processing functions without wasting groundwater. Enables the construction of a system useful for improving the environment, such as resource saving and carbon dioxide suppression.
I am convinced that the use of natural energy that does not affect the quality of groundwater and does not cause any problems in the health of the human body can contribute to real human life.
The first feature of the present invention is that groundwater is used as a medium for utilizing the thermostatic property of the underground, and that it is a transient system that uses a part of the infinite underground enthalpy.
The second feature of the present invention resides in that groundwater having a low water temperature is utilized as a cooling medium for a cold / hot water generator, and a system that achieves a reduction in the amount of cooling water in a transient system.
The introduction of these systems will lead to the development of a pioneering field of technological development that suppresses the generation of artificial heat, and we are convinced that the industrial effects that will drive future industrial development are enormous.

  The Example of this invention shows the flow sheet of this invention.

Explanation of symbols

A Groundwater tank B Groundwater heat storage tank C Absorption type cold / hot water generator D Well E City water T1 Intermediate treatment water tank T2 Treatment water tank T3 Receiving tank T4 Medium water elevated water tank T5 Water elevated water tank B Filtration tower B Membrane filtration device C Magnetic field irradiation device D Water supply pipe P1 Groundwater pump P2 Raw water pump P3 Middle water pump P4 Intermediate water pump P5 Treatment water pump P6 Cooling water pump P7 Water pumping pump L1 Well water pumping pipe L2 Water pumping pipe L3 Water supply pipe L4 Middle water pumping pipe L5 Middle water supply pipe L6 Raw water supply pipe L7 Raw water supply pipe L8 Cold / hot water outgoing pipe L9 Cold / hot water return pipe L10 Cooling water outgoing pipe L11 Cooling water return pipe L12 Treated water supply pipe L13 Communication pipe

Claims (4)

Deep wells (D) excavated to the geological zone holding groundwater to maintain a permanent temperature, thermal storage tanks (B) that are underground concrete tanks, groundwater tanks (A), and absorption cold / hot water generators (C) and
The regenerative water tank (B) and the underground water tank (A) are selectively communicated via a communication pipe (L13),
The groundwater is directly stored in the thermal storage tank (B),
The water stored in the regenerative water tank (B) is used as the condenser cooling water of the absorption cold / hot water generator (C), or the heat storage energy of water stored in the regenerative water tank (B), As a heat source for the heat exchanger of the absorption-type cold / hot water generator (C), a pipe (L11) for selectively storing in the ground water tank (A) and the heat storage water tank (B) is provided. The water supply system characterized by including means for utilizing the former or both of the water stored in the underground water tank (A) and the regenerative water tank (B) as irrigation water. As means for utilizing as the irrigation water, the raw water pump (P2) for pumping the water stored in the groundwater tank (A) to the filtration tower (A) and the filtration pretreated by the filtration tower (A) An intermediate treated water tank (T1) for storing water, and a middle water pump (P3) and intermediate water for storing filtered water in the intermediate treated water tank (T1) into an intermediate water elevated tank (T4) The water supply pipe (L4) and the middle water supply pipe (L5) for supplying the filtrate in the said middle water elevated water tank (T4) to each middle water utilization facility are characterized by the above-mentioned. Water supply system. As means for utilizing the water, the water stored in the groundwater tank (A) is pretreated by the raw water pump (P2) for pumping the water to the filtration tower (A) and the filtration tower (A). An intermediate water tank (T1) for storing filtered water, an intermediate water pump (P4) for pumping filtrate water stored in the intermediate water tank (T1) to a membrane filtration device (b), A treated water supply pipe (L12) for storing treated water highly treated by the membrane filtration device (b) in the treated water tank (T2), and treated water in the treated water tank (T2) are received in the water receiving tank (T3). Treated water pump (P5) and treated water pipe (L6) for storing water and treated water in the water receiving tank (T3) in a water supply elevated water tank (T5) And treated water in the water pumping pipe (L2) and the elevated water tank (T5), Claim 1 or 2 water supply system according to comprising water supply pipe for supplying the faucet and (L3). As the cooling water piping system for the absorption-type cold / hot water generator (C), the cooling water forward pipe (L10) and the cooling water return pipe (L11) are all closed piping systems, and there is no contact with the atmosphere, and The water stored in the regenerative water tank (B) is made into a transient type and pumped to the absorption cold / hot water generator (C) by the cooling water pump (P6) of the cooling water forward pipe (L10). The water supply system of any one of Claims 1-3 characterized by the above-mentioned.

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