JPH04292755A - Method and dfvice for cooling, heating snow melting and heat collection by utilization of heat storage in aquifer - Google Patents

Abstract

PURPOSE:To save energy by feeding hot water into a pipe buried in a pavement, collecting solar heat there to make hot water of high temperature, returning the hot water from a hot water well into an underground aquifer to keep hot heat in the qauifer and by repeating a water lifting up and a water returning operation alternatively every year. CONSTITUTION:Hot underground water stored in an underground aquifer 20 in summer season is pumped up from a hot water well with the first water lifting-up pump 3 in winter season, guided to an evaporator 9 of a heat pump 8. Heat of the hot water is absorbed to increase its temperature in a refrigeration cycle to make hot water in a hot water storing tank 19, the hot water is guided to a heat radiator and collecting device within a building to heat within the building. Cold underground water passed through the evaporator 9 of the heat pump 8 is passed in a pipe 14 buried in a pavement 13 to store heat in the pavement, resulting in that during a heating operation, water is also passed during no fall of snow, heat is radiated from the pavement surface, returned from a cold water well 2 to the underground aquifer 20 and then cold heat is stored in the aquifer.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a method and device for collecting heat for cooling, heating, and snow melting by utilizing heat storage in an aquifer, and in particular, it involves artificially collecting solar heat in the summer and storing it in an underground aquifer.
Six months later, in the winter, they are taken out and used for heating and snow removal, and
This invention relates to an air conditioning/heating/snow melting heat collection method and device for collecting solar heat by collecting low temperatures in winter, storing them in an underground aquifer, and taking them out in the summer half a year later and using them for air conditioning.

0002

[Prior Art] Conventionally, in the groundwater utilization method disclosed in Japanese Patent Publication No. 58-11529, low-temperature (7 to 10°C) groundwater is pumped up from a pumping well installed in a cold water zone in the summer using a pumping pipe. The indoor air is circulated through the heat exchanger using a cooling fan, and the water temperature is approximately 2.
After cooling, the final water is carried to the roof via piping, and water is sprinkled on the roof using a watering nozzle.
℃, solar heat is absorbed by raising the water temperature to 27-29℃. The heated water is guided through pipes to the injection well and injected deep into the earth, warming each underground layer and at the same time creating a warm water zone.

Furthermore, in the winter, high-temperature (23 to 25°C) groundwater is pumped up from a pumping well in the warm water zone using a pumping pump, and sent to an indoor heating heat exchanger through a pumping pipe, and then pumped indoors by a heating fan. By circulating air over this heat exchanger, heating is performed using hot water, and the final water after heating is transported to the rooftop and site via piping, and snow accumulated on the roof is melted by sprinkling water from the sprinkler nozzle. use. As a result, the water temperature becomes 5 to 7 degrees Celsius, which is much lower than the room temperature of groundwater and almost close to the outside temperature. This temperature-reduced final water is led underground again through pipes.
It is injected deep into the ground through injection wells, creating a cold water zone in the aquifer.

[0004] Furthermore, in the artificial groundwater reduction device for air conditioning equipment described in Publication of Utility Model Publication No. 63-25466, a pair of recharge wells, one of which is a hot water well and the other a cold water well, are each equipped with a pump. It includes conduits communicating between the recharge wells and allowing well water to flow from the hot water well to the cold water well or from the cold water well to the hot water well, and a refrigeration unit, with one refrigeration unit functioning as a condenser and the other functioning as an evaporator. The first and second condensers and evaporators functioning as Each has a switching valve that switches the flow direction of the refrigerant in the circulation pipe, and the well water in the pipe and the refrigerant in the circulation pipe exchange heat in the first condenser and evaporator, and the second A condenser/evaporator in which the fluid in the load-side pipe and the refrigerant in the circulation pipe exchange heat is known.

[0005]

[Problems to be Solved by the Invention] However, the conventional technology has had many problems. In other words, in the above-mentioned Japanese Patent Publication Publication No. 11529/1984, hot and cold water used for cooling and heating buildings was sprinkled on rooftops to collect solar heat, and after being allowed to cool naturally, it was directly injected into the groundwater belt, The dust and dirt were led to the groundwater zone, leading to underground pollution. In addition, even if you try to collect solar heat by sprinkling hot water in the summer, the water temperature will not rise above the outside temperature, so even if you store this hot water underground, the temperature of the groundwater pumped up in the winter will be slightly higher than the groundwater temperature at room temperature. However, there was a drawback that it could not be used for heating as it was.

Furthermore, in the above-mentioned Utility Model Publication No. 63-25466, the single use of heat is to cool the building in the summer through a refrigeration unit that has a hot water well and a cold water well, and the heat is used to heat the building in the winter as well. The disadvantage was that heat was not used effectively from the standpoint of resource and energy conservation.

The present invention was completed in view of the above circumstances, and it stores solar heat in the summer in an underground aquifer and uses it for heating and snow removal in the winter half a year later. It can be stored in an aquifer and used for summer cooling and road surface cooling after six months.It is safe and helps prevent air pollution because it does not generate combustion gas, and heat inside buildings is disposed of into the atmosphere during summer cooling. The object of the present invention is to provide a method and device for collecting heat for cooling, heating, and snow melting by utilizing heat storage in an aquifer, which is useful for preventing global warming because it is not released.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following methods: warm groundwater stored in an underground aquifer during the summer is pumped up from a hot water well during the winter, and guided to the evaporator of a heat pump. In the refrigeration cycle of the heat pump, the heat is absorbed to raise the temperature to create hot water, and the hot water is guided to the building to heat the inside of the building, and the cold groundwater that has passed through the evaporator of the heat pump is stored in pipes buried within the pavement. water is passed through the well to melt the snow that falls on the pavement surface, and the subsequent cold water is returned to the underground aquifer through the other cold water well, injecting cold heat into the aquifer. During the next summer, the cold water in the aquifer is pumped up from the cold water well and sent into the building, absorbing heat from inside the building to create hot water, and the hot water is sent into pipes buried within the pavement to absorb solar heat. The method is characterized by collecting high-temperature water, returning the high-temperature water from the hot water well to an underground aquifer, storing heat in the aquifer, and repeating and alternating the pumping and returning operations every year. This is a method of collecting heat for cooling, heating, and snow melting by utilizing heat storage in an aquifer.

[0009] Furthermore, the hot water well has a hot water well and a cold water well, and a first pump and a first injection pipe are provided in the hot water well, and the upper part of the first pump is connected to the inlet of the evaporator of the heat pump by the pump. and from the outlet of the evaporator, another pipe is connected via a first switching valve to a small diameter pipe buried in the pavement, and also to a first injection pipe extending into the water in the hot water well. On the other hand, the end of the small diameter pipe is connected to a second injection pipe in the cold water well via a second switching valve, and is also connected to a radiator/collector installed in the building by a pipe line. A second pump in the cold water well is connected to the end of the heat pump, and the inlet/outlet portion of the condenser of the heat pump forms a circulation pipe between the hot water tank and the hot water tank via the first circulation pump. is an air-conditioning, heating, and snow-melting heat collection device that uses heat storage in an aquifer, and is characterized by forming another circulation pipe between the building and the radiator/collector inside the building via a second circulation pump.

0010

[Operation] Next, the operation of the present invention will be explained. The cooling/heating/snow removal heat collection method and device using heat storage in an aquifer of the present invention pumps warm groundwater stored in an underground aquifer in the summer from a hot water well using the first pump in the winter to evaporate the heat pump. The hot water is introduced into the heat pump's refrigeration cycle to absorb heat and heat up to create hot water in the hot water storage tank, and this hot water is guided to the radiator/collector inside the building to heat the inside of the building. The cold groundwater that has passed through the heat pump's evaporator is passed through pipes buried within the pavement, storing heat within the pavement.This heat is dissipated to melt the snow that falls on the pavement and prevent it from freezing. At the same time, even when there is no snowfall, water is passed through to dissipate heat from the paved surface, and then the even colder groundwater is transferred to the other side via a second injection pipe whose lower end is submerged in the water in the cold water well. The cold water is returned to the underground aquifer from the cold water well and stored in the aquifer.

[0011] In the next summer, the cold water in the aquifer is pumped up from the cold water well by the second pump and sent to the radiator/collector inside the building, where it absorbs heat from inside the building to create hot water. The solar heat received by the paved surface is collected into high-temperature water by sending it into a pipe buried inside the pavement, and the high-temperature water is sent to the hot water well via a first injection pipe whose lower end is submerged in the water in the hot water well. The water is returned to the underground aquifer and the heat is stored in the aquifer, and the pumping and return operations are repeated and alternated every year.

0012

Embodiments Next, embodiments of the heat collection method and apparatus for cooling, heating, and snow melting by utilizing heat storage in an aquifer according to the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment in which the cooling/heating/snow melting heat collecting device using the aquifer heat storage according to the present invention is applied to a building. As shown in the figure, the hot water well 1 and the cold water well 2 in which the air conditioning/heating/snow melting heat collecting device of the present invention is implemented have a depth of 100 m to 3 m.
The hot water well 1 was drilled deep underground to a depth of 00 m.
A first lift pump 3 and a first injection pipe 5 are installed in the water, and a lift pipe 7a is connected to the upper part of the first lift pump, which is connected to the inlet of the evaporator 9 of the heat pump 8 installed on the ground. Another conduit extends from the outlet of the vessel 9 via a first three-way switching valve 11 and is connected to a small diameter pipe 14 buried in a black-colored pavement 13, preferably asphalt. The switching valve 11 is connected to a first injection pipe 5 whose lower end is submerged in water in the hot water well 1, and is connected to the small diameter pipe 14.
The end of the is connected to the second injection pipe 6 via the second three-way switching valve 12.
is installed extending into the water in the cold water well 2.

Further, this second switching valve 12 is connected via a conduit through a heat radiator/collector 16b provided in the building 15,
A pumping pipe 7b and a second pumping pump 4 are connected to the end of the pipe and are installed underwater in the cold water well 2, while the entrance and exit of the condenser 10 of the heat pump 8 is connected to the first circulating pump 17. A circulation pipe is formed between the hot water storage tank 19 and the hot water storage tank 19 via the second circulation pump 18.
Another circulation pipe is formed between the heat sink and the heat sink/heat collector 16a inside the building.

[0014] Therefore, in this embodiment configured as described above, the 2
Warm groundwater of 5°C to 30°C is pumped from a hot water well in the winter by the first pump 3 and guided to the evaporator 9 of the heat pump 8, where it is heated by heat absorption in the refrigeration cycle of the heat pump and stored in the hot water storage tank 19. Hot water of 45°C to 50°C is produced, and this hot water is guided to a radiator/collector inside the building to heat the inside of the building.

On the other hand, cold groundwater of 15° C. to 20° C. that has passed through the evaporator 9 of the heat pump 8 is passed through a steel pipe 14 with a diameter of 15 mm buried in the pavement 13 to store heat within the pavement. This heat dissipates to melt the snow falling on the pavement surface and prevent it from freezing, and during heating operation, water is passed even when there is no snowfall to dissipate heat from the pavement surface.
After that, the even colder groundwater of 5°C to 7°C is returned from the cold water well 2 to the underground aquifer 20 via the second injection pipe 6 whose lower end is submerged in the water in the cold water well 2. and store cold energy in the aquifer.

[0016] In the next summer, the aquifer 20 is removed from the cold water well 2.
The cold water at 6°C to 8°C is pumped up by the second pump 4 and sent to the radiator/collector 16b inside the building, where it absorbs heat from inside the building to become groundwater at 10°C to 15°C, which is then used for paving. The solar heat received by the paved surface is collected through a pipe 14 buried in the well 13 to produce high-temperature water of 30°C to 40°C. Heat is returned from the hot water well 1 to the underground aquifer 20 via the injection pipe 5 and stored in the aquifer, and the pumping and return operations are repeated and alternated every year. .

In this example, hot water wells and cold water wells are provided to perform pumping and return alternately, but the groundwater flow velocity and flow direction, the amount of water used, the thickness of the aquifer, and the voids in the aquifer With a clear understanding of the ratio etc., find the distance and depth of the two wells,
By installing a pumping well on the downstream side of groundwater and a reinjection well on the upstream side, warm water collected in the summer can be returned to the underground aquifer from the upstream reinjection well. The warm water mass in the layer reaches the vicinity of the pumping well on the downstream side, so in winter, warm water is pumped up from the pumping well and used for heating, snow removal, etc., and then the cold water is returned to the reinjection well on the upstream side. You can also save it for use next summer.

Furthermore, in the summer use of this embodiment, although the operation of the heat pump is stopped, depending on the air conditioning condition inside the building, another conduit (not shown) may be installed to switch the heat pump to cooling operation to operate the heat pump inside the building. You may also use air conditioning.

[0019]

[Effects of the Invention] Since the present invention has the configuration as explained above, it has the following effects. The cooling/heating/snow melting heat collection method using heat storage in an aquifer according to the present invention contributes to energy saving because summer heat is stored in an underground aquifer and used in two stages: heating and snow melting in the winter half a year later. This is a big deal, and the fact that the cold heat in the winter is stored in an underground aquifer and used in two stages, cooling and collecting heat in the summer six months later, makes the contribution to energy conservation even greater.

[0020] In addition, since heating in winter does not involve the combustion of fossil fuels, there is no danger of fire, and it is safe, and since no combustion gas is generated, it is useful for preventing air pollution. Furthermore, unlike conventional cooling methods, in summer cooling, the heat inside the building is not released into the atmosphere, which greatly contributes to the prevention of global warming. Furthermore, heated waste water after cooling in the summer is passed through pipes buried in the parking lot road surface, etc., to collect solar heat, which helps prevent paving materials from softening. Because it is stored in layers, it has many effects, including an extremely large effect on preventing global warming.

[Brief explanation of drawings]

FIG. 1 is a partially perspective sectional view showing an embodiment of the present invention.

[Explanation of symbols]

1 Hot water well 2 Cold water well 3 First pump 4 Second pump 5 First injection pipe 6 Second injection pipe 7 Lifting pipe 8 Heat pump 9 Evaporator 10 Condenser 11 First switching valve 12 Second switching valve 13 Paving body 14 Small diameter pipe 15 Building 16 Heat sink and heat collector 17 First circulation pump 18 Second circulation pump 19 Hot water storage tank 20 Aquifer

Claims (2)

[Claims] Claim 1: Warm groundwater stored in an underground aquifer in the summer is pumped up from a hot water well in the winter, guided to the evaporator of a heat pump, and heated by heat absorption in the refrigeration cycle of the heat pump to produce hot water. The hot water is guided into the building to heat the inside of the building, and the cold groundwater that has passed through the evaporator of the heat pump is passed through pipes buried within the pavement to melt snow that falls on the pavement surface. The subsequent even colder groundwater is returned to the underground aquifer from the other cold water well, storing cold heat in the aquifer, and the next summer, the cold water is returned to the aquifer from the cold water well. The cold water is pumped up and sent into the building, and heat is absorbed from inside the building to create hot water, and the hot water is sent into pipes buried within the pavement to collect solar heat and turn it into high-temperature water.
The high-temperature water is returned to an underground aquifer from the hot water well, heat is stored in the aquifer, and the pumping and return operations are repeated and alternately performed every year. A heat collection method for cooling, heating, and snow melting using heat storage. 2. The hot water well has a hot water well and a cold water well, and a first pump and a first injection pipe are provided in the hot water well, and the upper part of the first pump is connected to the inlet of the evaporator of the heat pump by the pump pipe. and from the outlet of the evaporator, another pipe is connected via a first switching valve to a small diameter pipe buried in the pavement, and also to a first injection pipe extending into the water in the hot water well. On the other hand, the end of the small diameter pipe is connected to a second injection pipe in the cold water well via a second switching valve, and is also connected to a radiator and collector installed in the building by a conduit,
A second pump in the cold water well is connected to the end of the pipe, and a circulation pipe is formed between the entrance and exit of the condenser of the heat pump and the hot water storage tank via the first circulation pump, The hot water storage tank is characterized in that another circulation pipe is formed between it and a radiator/collector inside the building via a second circulation pump. thermal equipment.