JPH04292756A - Method and device for cooling, heating, snow melting and heat collection by utilization of heat storage in aquifer - Google Patents

Abstract

PURPOSE:To save energy by guiding cold water from a terminal end of a pipe to an evaporator of the second heat pump, absorbing heat heat pump to make hot water and repeating a water pumping-up operation and a water returning operation every year. CONSTITUTION:Cold underground water passed through an evaporator 10a of a heat pump 8 is passed in a pipe 17 buried in a pavement 16 so as to store heat within the pavement 16, snow fell on the pavement is melted with radiation of this heat and then a freezing at the pavement surface is prevented. During a heating operation, water is also passed during no snow fall to radiate heat from the pavement surface, then the cooled cold underground water is guided again to an evaporator 10b of the second heat pump 9, the underground water cooled to a more cold state and controlled is passed through the second water feeding pipe 6 with its lower end being buried in water in a cold well, returned back to the underground aquifer 24 from a cold water well 2 and stored to keep cold heat in water of which heat is absorbed and its temperature is increased during a refrigeration cycle of the second heat pump 9.

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 No. 58-11529, the hot and cold water used for cooling and heating the building was sprinkled on the rooftop to collect solar heat and let it cool naturally, and then directly injected into the groundwater zone. There was a problem in that dust and dirt from the water were introduced into the groundwater zone, causing 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 summer heat in an underground aquifer and uses it for heating and snow removal in the winter six months later, and also stores cold heat in the winter in an underground aquifer. It can be stored in an aquifer and used for cooling and heat collection in the summer half a year later, and in winter operation, the temperature of groundwater that is ultimately returned to the ground can be artificially controlled, which is efficient and prevents fires. The object of the present invention is to provide a heat collection method and device for cooling, heating, and snow melting by utilizing heat storage in an aquifer, which is non-hazardous, safe, and useful for preventing air pollution because no combustion gas is generated.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention aims to pump warm groundwater stored in an underground aquifer in the summer from a hot water well in the winter and guide it to the evaporator of the first heat pump. , create hot water by endothermic heating in the refrigeration cycle of the first heat pump, lead the hot water to the building to heat the inside of the building, and pump the cold groundwater that has passed through the evaporator of the first heat pump into the pavement. The cold water from the end of the pipe is led to the evaporator of the second heat pump, where it absorbs heat in the refrigeration cycle of the second heat pump. The temperature is raised to create hot water, which is then guided into a building together with the hot water created by the first heat pump to heat the inside of the building, and then passes through the evaporator of the second heat pump to cool the ground water even further. One of the cold water wells returns the cold water to the underground aquifer, storing cold heat in the aquifer, and in the next summer, the cold water in the aquifer is pumped up from the cold water well and sent into the building. Heat is absorbed from the water to create hot water, and the hot water is sent to pipes buried inside the pavement to collect solar heat to create high-temperature water.The high-temperature water is returned to the underground aquifer from the hot water well to recharge the aquifer. This is a heat collection method for cooling, heating, and snow melting that utilizes heat storage in an aquifer, and is characterized by storing heat in the aquifer and repeating and alternating the above operations of pumping and reducing water every year.

[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 evaporator of the first heat pump by the pump. A first injection pipe is connected to the inlet part, and another pipe line is connected from the outlet part of the evaporator to a small diameter pipe buried in the pavement via a first switching valve, and a first injection pipe extends into the water in the hot water well. On the other hand, the end of the small diameter pipe is connected via a third switching valve to the inlet of the evaporator of the second heat pump, and the outlet of the evaporator of the second heat pump is connected to a fourth switching valve and a fourth switching valve. A pipeline is connected to the second injection pipe via two switching valves and extends into the water in the cold water well, and the second switching valve and the third switching valve are connected by a pipeline, Moreover, the fourth switching valve is connected to a second water pump and a second water pump installed underwater in a cold water well via a radiator/collector installed in the building, and A circulation pipe is formed between the inlet/outlet of the condenser of the heat pump and the hot water storage tank via a first circulation pump, and the inlet/outlet of the condenser of the second heat pump is connected to the hot water storage tank via a third circulation pump. A circulation pipe is formed between the hot water storage tank and a heat radiator/collector inside the building via a second circulation pump, and another circulation pipe is formed between the hot water storage tank and a heat radiator/collector inside the building. This is an air-conditioning, snow-melting heat collection device that utilizes heat storage in an aquifer.

0010

[Operation] Next, the operation of the present invention will be explained. The cooling/heating/snow melting heat collection method and device using the aquifer heat storage of the present invention pumps warm groundwater stored in an underground aquifer in the summer from a hot water well with the first pump in the winter, and pumps it into the first heat pump. The hot water is led to the evaporator, heated by heat absorption in the refrigeration cycle of the first heat pump, and created hot water in the hot water storage tank.This hot water is led to the radiator/collector inside the building to heat the inside of the building. The cold groundwater that has passed through the evaporator of the first heat pump is passed through pipes buried within the pavement to store heat within the pavement, and this heat is radiated to melt the snow that falls on the pavement surface, creating a paved surface. In addition to preventing the surface from freezing, water is passed even when there is no snowfall to radiate heat from the paved surface, and the cold water from the end of the pipe is guided to the evaporator of the second heat pump, where it absorbs heat and increases in the refrigeration cycle of the second heat pump. The heated water is heated to create hot water, which is guided into the building together with the hot water produced by the first heat pump to heat the building, and then passed through the evaporator of the second heat pump, and the cooled groundwater is then cooled down to the lower end. The cold water is returned to the underground aquifer from the other cold water well via a second injection pipe submerged in the water in the cold water well, thereby storing cold heat 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 stored in the aquifer, and the pumping and reduction operations are repeated and alternated every year.

0012

Embodiments Next, embodiments of the method and apparatus for collecting heat 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 cooling/heating/snow melting heat collecting device of the present invention is implemented have a depth of 100 m to 300 m.
A well is drilled deep underground to a depth of m, and a first pump 3 and a first injection pipe 5 are installed in the water of the hot water well 1, and a pump pipe 7a is connected to the upper part of the first pump 3, and is connected to the top of the first pump 3. Connected to the inlet of the evaporator 10a of the first heat pump 8 provided, another conduit extends from the outlet of the evaporator 10a via a first three-way switching valve 12, preferably made of black colored material such as asphalt. A small-diameter pipe 17 buried within the paving body 16
The first switching valve 12 is connected to the first injection pipe 5 whose lower end is submerged in water in the hot water well 1, and the end of the small diameter pipe 17 is connected to the first injection pipe 5 through a third three-way switching valve 14. Connected to the inlet of the evaporator 10b of the two heat pumps 9 through a pipe,
The outlet of the evaporator 10b of the second heat pump 9 is connected to the second injection pipe 6 via the fourth three-way switching valve 15 and the second three-way switching valve 13, and extends into the water in the cold water well 2. It has been installed.

Further, the second switching valve 13 and the third switching valve 14 are connected through a pipe. Further, the fourth switching valve 15 is connected to the second water pump 7b and the second water pump 4 via a radiator/collector 19a provided in the building 18, and is installed underwater in the cold water well. A circulation pipe is formed between the inlet and outlet of the condenser 11a of the first heat pump 8 and the hot water storage tank 23 via the first circulation pump 20, and the inlet and outlet of the condenser 11b of the second heat pump 9 is connected to the hot water storage tank 23 via the first circulation pump 20. A circulation pipe is formed between the hot water storage tank 23 and the hot water storage tank 23 via a third circulation pump 22, and the hot water storage tank 23 is connected to a radiator/collector 19 inside the building 18 via a second circulation pump 21.
Another circulation conduit is formed between the

[0014] Therefore, in this embodiment configured as described above, the 2 water stored in the underground aquifer 24 during summer is
Warm groundwater of 5°C to 30°C is pumped from the hot water well 1 in the winter by the first pump 3 and sent to the evaporator 1 of the first heat pump 8.
0a, and is heated by heat absorption in the refrigeration cycle of the first heat pump 8 to reach a temperature of 45°C to 50°C in the hot water storage tank 23.
This hot water is used in the radiator/collector 1 inside the building.
9b 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 10a of the heat pump 8 is passed through a steel pipe 17 with a diameter of 15 mm buried within the pavement 16 to store heat within the pavement 16,
This heat dissipates to melt the snow falling on the pavement surface and prevent it from freezing, and during heating operation, water is passed through even when there is no snowfall, dissipating heat from the pavement surface, so that it can melt the snow that falls on the pavement surface and prevent it from freezing. The groundwater at a temperature of 7°C to 7°C is guided again to the evaporator 10b of the second heat pump 9, and the groundwater is cooled down to a temperature of 3°C to 4°C. The cold water is returned to the underground aquifer 24 from the cold water well 2 via the pipe 6, and cold heat is stored in the aquifer. Also,
As in the case of the first heat pump, heating is performed using hot water of 45° C. to 50° C. obtained by endothermic heating in the refrigeration cycle of the second heat pump 9.

[0015] In the next summer, the aquifer 24 is drained from the cold water well 2.
The cold water at 5°C to 7°C is pumped up by the second pump 4 and sent to the radiator/collector 19a 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 17 buried in the well 16 to produce high-temperature water of 30°C to 40°C. The heat is returned from the hot water well 1 to the underground aquifer 24 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 porosity of the aquifer By clearly understanding the distance and depth of the two wells, and installing a pumping well on the downstream side and a reinjection well on the upstream side, hot water collected in the summer can be transferred underground from the upstream reinjection well. When the water is returned to the aquifer, the warm water in this aquifer reaches downstream near the pumping well in the next winter, so hot water is pumped up from the pumping well in the winter for heating, snow removal, etc. It is also possible to return the cold water that has been used for the next summer to the upstream reinjection well.

Furthermore, in the summer use of this embodiment, the operation of the first and second heat pumps is stopped, but depending on the air conditioning situation inside the building, another conduit (not shown) is installed to switch the heat pumps to cooling operation. The interior of the building may be cooled using air conditioning.

[0018]

[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 collecting method using heat storage in an aquifer according to the present invention greatly contributes to energy saving because summer heat is stored in an underground aquifer and used for heating and snow melting in the winter half a year later. In addition, the cold energy generated during the winter is stored in an underground aquifer and used six months later in the two stages of cooling and heat collection during the summer, further contributing to energy savings.

In addition, during winter operation, heat is collected from the underground aquifer's hot water stored during the summer in the first stage using a heat pump and used for heating, and in the second stage heat is collected from the pipes buried in the road surface. The heat is released by melting the snow on the road surface, and in the third stage, heat is collected from the cold water after snow melting and used for heating, and finally the temperature of the cold water is artificially controlled. Since the groundwater is stored in an underground aquifer, the temperature of the groundwater that is pumped up the next summer can be kept much lower than the room temperature of the groundwater, making it easier and more effective to manage the cooling of buildings with a small amount of pumped water.

[0020] Furthermore, since heating in winter does not involve the combustion of fossil fuels, there is no risk of fire, and it is safe, and since no combustion gas is generated, it is useful for preventing air pollution. Also,
Unlike conventional cooling methods, this method is highly effective in preventing global warming because the heat inside the building is not disposed of into the atmosphere during summer cooling.

Furthermore, the heated wastewater after cooling in the summer is passed through pipes buried in the parking lot road surface, etc. to collect solar heat, which helps prevent the paving material from softening, and also directs the solar heat received from the parking lot road surface underground. Because it is stored in aquifers, it has many effects, including an extremely large contribution to 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 First heat pump 9 Second heat pump 10 Evaporator 11 Condenser 12 First switching valve 13 Second switching valve 14 Third switching valve 15 Fourth switching valve 16 Paving body 17 Small diameter pipe 18 Building 19 Heat sink and heat collector 20 First circulation pump 21 Second circulation pump 22 Third circulation pump 23 Hot water storage tank 24 Aquifer

Claims (2)

[Claims] Claim 1: Warm groundwater stored in an underground aquifer during the summer is pumped up from a hot water well during the winter, guided to the evaporator of the first heat pump, and heated by endothermic heat in the refrigeration cycle of the first heat pump. The hot water is introduced into the building to heat the inside of the building, and the cold groundwater that has passed through the evaporator of the first heat pump is passed through pipes buried inside the pavement and heated above the pavement surface. The cold water from the end of the pipe is led to the evaporator of the second heat pump, and heated by heat absorption in the refrigeration cycle of the second heat pump to create hot water, which is then heated by the first heat pump. The heated water is guided into the building to heat the inside of the building, and the ground water passes through the evaporator of the second heat pump and is even colder, returning it to the underground aquifer from the other cold water well. Cold heat is stored in the aquifer, and in the next summer, the cold water in the aquifer is pumped up from the cold water well and sent into the building, where heat is absorbed from inside the building to create hot water, and the hot water is poured into the pavement. The solar heat is collected into high-temperature water by sending it into a buried pipe, and the high-temperature water is returned to the underground aquifer from the hot water well to store the heat in the aquifer, and the pumping and return operations described above are carried out. This is a heat collection method for cooling, heating, and snow melting that utilizes heat storage in an aquifer, which is repeated and alternated every year. 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 evaporator of the first heat pump by the pump pipe. A first injection pipe is connected to the inlet part, and another pipe line is connected from the outlet part of the evaporator to a small diameter pipe buried in the pavement via a first switching valve, and a first injection pipe extends into the water in the hot water well. On the other hand, the end of the small diameter pipe is connected via a third switching valve to the inlet of the evaporator of the second heat pump, and the outlet of the evaporator of the second heat pump is connected to a fourth switching valve and a fourth switching valve. The pipe is connected to the second injection pipe via two switching valves and extends into the water in the cold water well,
Further, the second switching valve and the third switching valve are connected by a pipe, and the fourth switching valve is installed underwater in a cold water well via a radiator/collector installed in the building. A certain second water pump is connected to a second water pump, and a circulation pipe is formed between the inlet/outlet part of the condenser of the first heat pump and the hot water storage tank via the first circulation pump. A circulation pipe is formed between the entrance and exit of the condenser of the heat pump and the hot water storage tank via a third circulation pump, and the hot water storage tank is connected to a radiator and heat collector inside the building via a second circulation pump. A heat collection device for cooling, heating, and snow melting that utilizes heat storage in an aquifer, characterized in that another circulation pipe is formed between the two.