JP2011007029A - Cold recovery device for snow ice cooling having dual submerged cold water tank using permeable pavement material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold recovery device in which a pipe for heat exchange is laid under a snow ice lump and which protects the pipe against the weight of the snow ice lump and a load applied from a heavy machine thereto during a snow ice stacking operation because a conventional submerged snow ice cooling device cannot cope with a high cold load as compared with the size of the flat surface of a cold water tank since an unplanned water channel is formed so that circulation water is bypassed while avoiding the snow ice lump, thus deteriorating heat exchanging efficiency, and only the snow ice lump at the upstream side is molted so as to precede since a temperature of the circulation water is high at the upstream side in the cold water tank.SOLUTION: The dual cold water tank 8 having a permeable pavement 6 on the surface is installed under the stacked snow ice stored indoors and outdoors. Heat exchange is performed between the cold water generated from the snow ice and a circulation fluid in the pipe by the pipe 18 laid under the paved surface to obtain cold heat from the snow ice lump, and the cold heat is supplied to a cold consumer 4. The permeable paved surface serves as a filter for impurities contained in the snow ice, and protects the pipe 18.

Description

  The present invention relates to an apparatus for exchanging heat by piping under a snow block among methods for recovering cold heat from snow and ice in snow and ice cooling.

  Snow and ice cooling is a type of seasonal heat storage, in which snow and ice formed by nature in winter are preserved until summer, and cold is used in summer.

  Snow and ice cooling is classified into an all-air method using air as a medium and a cold water circulation method using a liquid such as water, depending on the type of heat medium.

  Of the cold water circulation type snow and ice cooling systems, heat is exchanged in the water-spraying method in which circulating water is sprayed directly onto the snow and ice block, the flowing water type in which the circulating water flows under the snow and ice block, and the snow and ice block immersed in the cold water tank. There is a submersion type to perform.

  In the submerged snow and ice cooling device, there is a problem that the unscheduled water channel is formed such that the circulating water avoids the snow and ice block and bypasses to a portion with less resistance, thereby reducing the heat exchange efficiency.

  In the conventional submersible snow and ice cooling system, the circulating water has a high temperature on the upstream side in the cold water tank, so only the snow and ice mass on the upstream side melts in advance, resulting in a high cooling load for the plane size of the cold water tank. There was a problem that could not be handled.

  When laying piping for heat exchange under the snow and ice mass, there is a problem that the piping is easily broken due to the weight of the snow and ice mass and the heavy equipment load in snow and ice accumulation work and maintenance work.

  The surface of the inundation tank is made of permeable pavement, protecting the heat exchange pipes and passing only cold water generated from snow and ice accumulation snow mass while removing impurities such as earth and sand contained in the snow and ice mass Get cold water.

  Between the permeable pavement and the waterproof layer at the bottom, it is filled with quarrying so that water can flow easily, and piping for heat exchange is laid inside.

  A refrigerant is circulated in the heat exchange circuit piping, and cold is obtained by heat exchange.

  In order to improve the efficiency of heat exchange, the water in the entire water tank below the snow ice block is circulated by pump power, and cold is also obtained here.

  Workability of snow and ice accumulation work and maintenance work is improved.

  Cold heat can be recovered stably from snow and ice blocks.

  Since the cold heat can be uniformly recovered from the lower surface of the snow and ice lump, it is possible to increase the effective use of snow and ice and supply high output.

BEST MODE FOR CARRYING OUT THE INVENTION

  The cold water tank 8 below the snow mass has a double structure as shown in FIG. Only cold water generated from the snow mass is allowed to pass, and cold water is obtained while removing impurities such as earth and sand contained in the snow ice mass on the pavement surface. The space between the permeable pavement 6 and the bottom waterproof layer 17 is filled with quarrying, and a heat exchange circuit pipe 18 is laid therein. A refrigerant is circulated in the pipe 18 to obtain cold energy by heat exchange.

  As shown in FIG. 1, the snow 2 is put directly into the cold water tank 8, and at the time of cooling operation, operation is performed while maintaining the depth at which the lower part of the snow mass is immersed in water. The cold water sent from the water collecting tank 10 provided at the center lower part of the cold water tank to the water collecting tank 11 is sent to the heat exchanger 12 by the submersible pump 19, deprived of heat from the secondary circuit, and again The water is discharged into the cold water tank 8 from the ring water port 9 upstream of the cold water tank 8. The water returned from the ring water port 9 flows under the snow blocks and the gaps until reaching the water collecting basin 10, but at this time, the snow 2 is deprived of heat and cooled.

  The snow storage method may be indoor snow storage warehouses other than snowy mountains, and the snow may be artificial snowfall, natural ice, or artificial ice.

  A water storage tank will be installed at the bottom of the outdoor snow removal area to collect heat from the snow in the summer and use it for cooling buildings.

  A snow storage warehouse having the device of the present invention is built on the site, snow removal snow such as parking lots is preserved, cold is recovered from the snow in summer, and is used as a heat source for cooling and refrigeration.

  Since high-power cooling can be secured stably, it is expected to be introduced in medium- and large-scale facilities with large demand for cooling.

  It is a system diagram of the present invention.

DESCRIPTION OF SYMBOLS 1 Snow mountain 2 Snow 3 Machine room 4 Refrigeration demand 5 Underground water pipe 6 Permeable pavement 7 Heat insulating material 8 Cold water tank 9 Ring water port 10 Drainage basin 11 Sampling basin 12 Heat exchanger 13 Circulation pump 14 Water temperature adjustment circuit 15 Filter 16 Overflow water 17 Waterproof layer 18 Heat exchange circuit piping 19 Submersible pump

Claims (1)

  A double-structured cold water tank with a permeable pavement on the surface of the accumulated snow and ice stored indoors and outdoors is installed, and the piping laid under the pavement surface exchanges heat between the cold water generated from snow and ice and the circulating fluid in the pipe. As a result, cold energy is obtained from the snow and ice block and supplied to the cold energy customer. The permeable pavement surface functions as a filter against impurities contained in snow and ice, and at the same time, protects the piping. A cold energy recovery device that efficiently obtains cold energy from snow and ice and uses it as a cold energy source for cooling and refrigeration.

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