JPH0768682B2 - Heat storage type snow melting device using wind power - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing snow melting and freezing on a road surface.

Conventional technology For example, snow removal on roads is generally performed by using a civil engineering machine such as a shovel loader.However, this type of snow removal work is performed only after a certain amount of snow is accumulated, and the snow removal work is performed by traffic. There is also a case where the road is temporarily blocked, so an alternative method is desired on roads with heavy traffic. Further, as a means for preventing the freezing of the road surface, a means for spraying an antifreezing agent such as lime is known, but since the antifreezing agent may adversely affect the vehicle, the road surface or the surrounding environment, the antifreezing agent should be used. It is not always the preferred method to use.

Therefore, conventionally, as a device for preventing snow melting and freezing on a road, a device for spraying groundwater and a device for burying a heat pipe immediately below the road surface to keep the road surface warm by geothermal heat are known.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned device for spraying groundwater, the temperature of groundwater is 5 to 5.
It is a device that melts snow on the road surface by using it because it has a sufficient amount of heat to melt snow at about 15 ° C, but it constantly pumps up groundwater and sprays it on the road surface throughout the snow season. Since there is a need for groundwater consumption, there is a possibility that it will cause ground subsidence as a result, and because it requires power to pump groundwater,
There was the inconvenience of running costs.

In addition, a device that draws geothermal heat to near the road surface by using a heat pipe uses natural heat as it is, and only transfers heat, so there is no running cost and there should be no moving parts. However, in many cases there is more snowfall than the amount of geothermal heat that can be used for snowmelting, and in such cases an auxiliary heat source must be used, which ultimately results in cost and There was a problem that required equipment.

The present invention has been made in view of the above circumstances, and provides a snow melting apparatus that can fluctuate throughout the year and can effectively use snow energy and low-density natural energy to prevent snow melting and freezing effectively. The purpose is.

Means for Solving the Problems The present invention, in order to achieve the above object, a heat pipe laid directly under a road surface of a road, and a hot water circulation path in which one end of the heat pipe faces heat exchange. , The heat storage unit connected to the hot water circulation path and installed at the bottom of the road, the wind power generator installed away from the heat storage unit, and the heat storage unit with the electric energy generated by the wind power generator. An electric-heat exchange device for heating is provided.

Action In this invention, the energy for melting snow and ice is obtained from the wind. That is, the wind drives the wind power generator to generate electric power. It should be noted that such power generation by the wind power generator can be performed throughout the year. The electric power heats the heat storage unit via the electricity-heat exchange device, and heat energy is stored. The heat of the heat storage section is carried to one end of the heat pipe as hot water. Therefore, in the heat pipe, one end is a heating part and the other end is a heat radiating part to generate heat transfer, and as a result, the snow surface and the frozen surface on the upper side where the heat pipe is laid are heated, Melting snow and ice. Further, since the heat storage unit is installed in the ground below the road, the heat storage unit also serves as the foundation of the road, and the space can be effectively used.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention, and the example shown here is configured to perform snow melting on a road. That is, a plurality of heat pipes 2 are buried almost horizontally just below the road surface 1, and one end of each heat pipe 2 is inserted into the hot water circulation pipe 3 so as not to leak water. Here, the heat pipe 2 is a vacuum degassed closed pipe such as a stainless pipe in which a fluid that evaporates and condenses in a target temperature range such as water or CFC is enclosed as a working fluid. They are arranged in the width direction of the road surface 1 and arranged in two rows along the longitudinal direction of the road surface 1. Further, both ends of the hot water circulation pipe 3 are connected to a heat storage unit 4 installed in the ground below the road, and hot water in the heat storage unit 4 is circulated to apply heat to one end of the heat pipe 2. Has been done. A pump 5 is provided at a predetermined position in the middle of the hot water circulation pipe 3.

On the other hand, the heat storage unit 4 has a structure in which a water storage tank 4a made of concrete (preferably heat-insulating concrete) is filled with water 4b and crushed stone 4c, and heat is stored as sensible heat of these water 4b and crushed stone 4c. Is configured.

The energy for heating the heat storage unit 4 is obtained from the wind, and the device therefor is configured as follows. That is, a wind power generator 7 mainly including a wind turbine 6 and a generator (not shown) driven by the wind turbine 6 is installed at a predetermined position near the road surface 1, and the wind power generator 7 supplies electricity to the heat pump 8. It is connected to the heat pump 8 to supply it. That is, the heat storage unit 4 buried under the road surface 1 and the wind power generator 7 installed near the road surface 1 are connected via the heat pump 8. As the heat pump 8, various types can be used as required, and a compression type can be used as an example. This is almost the same as that used in a general compression refrigerator and the like, and a compressor, a condenser, and an evaporator (not shown) are connected by a circulation pipe line filled with a refrigerant, The compressor is driven by the electric power supplied from the wind power generator 7 to pressurize and compress the refrigerant to increase its enthalpy, which is guided to the condenser installed in the heat storage tank 4a so that the heat is radiated there. It is configured such that the liquefied refrigerant is adiabatically expanded to reduce the enthalpy, and heat is taken from the atmosphere in the evaporator to be evaporated and vaporized. That is, the heat of the atmosphere is transferred to the heat storage unit 4 to heat and heat the heat storage unit 4.
A storage battery charged by the wind power generator 7 may be used to ensure stable operation of the compressor.

Next, the operation of the equipment configured as described above will be described.

The above-mentioned equipment acts differently during the snowless season and the snowless season, and performs a heat storage effect during the snowless season and performs a heat storage effect and a snow melting effect during the snowy season. That is, during the snow-free period, the pump 5 is stopped and the water in the heat storage tank 4a is kept stationary. In this state, when the wind turbine 6 is rotated and the wind power generator 7 generates electricity, The electric power drives the heat pump 8 to heat the inside of the heat storage tank 4a. As a result, the temperatures of the water 4b and the crushed stone 4c rise, and heat is stored as sensible heat of these. Such heat storage action is performed by the wind power generator 7
Because it is powered by, it can be done at any time of the year, for example during the snow season.

On the other hand, during the snow season of winter, the heat storage unit 4 described above is used.
In parallel with the above heating, the snow on the road surface 1 is performed by the heat of the heat storage unit 4. That is, when the pump 5 is operated, the hot water in the heat storage unit 4 is pumped up and flows inside the hot water circulation pipe 3, and as a result, one end of the heat pipe 2 inserted in the hot water circulation pipe 3 is heated by the hot water. Since this heat pipe 2 is buried just below the road surface 1,
The temperature of the end portion of the heat pipe 2 on the side of the hot water circulation pipe 3 is high, and the temperature of the portion on the opposite side is low, and due to such a temperature difference, the working fluid inside evaporates on one end side and The heat of the hot water is widely dispersed and carried immediately below the road surface 1 by radiating heat and condensing after the steam flows to the low temperature portion. Therefore, the road surface 1 is heated from below, so that the snow on it is melted.
The hot water whose temperature has been lowered due to the heat taken by the heat pipe 2 is returned to the heat storage tank 4a, where it is heated and then sent back to the hot water circulation pipe 3 to carry the heat to the heat pipe 2 and thus continue. Then, the snow is melted.

In addition, in the above-mentioned embodiment, the structure in which water and crushed stones are filled in the heat storage tank as the heat storage part is shown, but when the heat exchanger can be used, the latent heat storage material is used as the heat storage material. The latent heat storage material may be directly heated by a heat pump and the heat of the latent heat storage material may be applied to water via the heat exchanger. Further, since it is preferable that the heat pipe positively dissipate heat only to the road surface side, it is preferable to provide a heat insulating mat or an appropriate heat insulating layer under the heat pipe. Further, in order to automate the snow melting, the pump may be started / stopped based on a signal from a control device mainly including a sensor for detecting snow such as a snow sensor. Further, the equipment of the present invention can be used not only for melting snow on the road surface but also for preventing freezing of the road surface or for melting ice.

EFFECTS OF THE INVENTION As is clear from the above description, according to the present invention, in addition to utilizing wind energy, and because it is provided with a heat storage means, the density itself is low, and the characteristics of the natural world of fluctuating characteristics are changed. Energy can be stored effectively for practical use throughout the year. And since the road surface is heated via a heat pipe, uniform heating is possible,
Therefore, according to the present invention, it is possible to effectively melt snow on the road surface by utilizing natural energy and without running cost. Further, according to the present invention, the heat storage section is installed in the ground below the road, so that the heat storage section also serves as the foundation of the road, and therefore the space section can be effectively used.

[Brief description of drawings]

FIG. 1 is a schematic system diagram showing an embodiment of the present invention. 1 ... Road surface, 2 ... Heat pipe, 3 ... Hot water circulation pipe, 4
… Heat storage part, 7… Wind power generator, 8… Heat pump.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Ito 1273, Onna, Atsugi-shi, Kanagawa Road Public Housing No. 131 (72) Inventor Yuji Saito 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Densen Stock In-house (56) References JP 60-233204 (JP, A) JP 59-16539 (JP, Y2)

Claims (1)

[Claims] 1. A heat pipe laid directly under a road surface of a road, a hot water circulation passage in which one end of the heat pipe faces heat exchange, and the hot water circulation passage are connected to each other and installed at a lower portion of the road. And a wind power generator installed separately from the heat storage unit, and an electric-heat conversion device for heating the heat storage unit with electric energy generated by the wind power generator. Heat storage type road surface snow melting device using wind power.