JPH0456229B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an energy-saving low-temperature warehouse that can store items at low cost by using outside cold air in cold regions.

``Prior Art'' Conventionally, energy-saving low-temperature warehouses with the following structure have been proposed as low-temperature warehouses in cold regions, which utilize outside cold air in winter to reduce storage costs.

In other words, an ice making pit is installed in an above-ground building or a space inside the bedrock used as a storage place, and cold air is sent directly to the ice making pit during the winter, or cold heat is sent through a heat pipe, and the cold heat is stored in the ice making pit. This structure enables low-temperature storage in spring and summer using cold energy.

``Problems to be solved by the invention'' By the way, even in cold regions, there are cases in which, due to weather fluctuations, there are cases in which warm days persist for a long period of time, so that natural ice can barely form on the ground even in winter. It can happen. When placed under such weather conditions in the winter, the conventional energy-saving low-temperature warehouse described above does not sufficiently store cold heat in the winter, which poses a problem in that it interferes with low-temperature storage in the spring and summer.

This invention was made in view of the above circumstances,
A system for cold regions that can reliably store cold heat for low-temperature storage in spring and summer, even under weather conditions where warm days continue for a long time in winter and natural water production on the ground is barely possible. The purpose is to provide an energy-saving low-temperature warehouse.

``Means for Solving the Problems'' The energy-saving low-temperature warehouse for cold regions according to the present invention cools the space inside the bedrock or the outside of the above-ground building used as a storage place with outside cold air, and also cools the ice making inside the warehouse through brine. A brine storage tank is provided to send cold heat into the pit, and the brine storage tank is configured to be cooled to sub-zero temperature by making ice with outside cold air and injecting cryogen in the vicinity of this brine storage tank. The system is equipped with a water storage tank for charging cryogen to supply cold energy to the tank.

"Function" According to the above configuration, even under weather conditions where natural ice is barely formed on the ground, if a cryogen is put into the water tank, the temperature inside the tank will drop below zero due to the ice in the tank and the cryogen. , a large amount of cold energy can be obtained. Then, this cold energy is supplied to the brine storage tank via the heat pipe, and furthermore, the above cold energy is sent to the ice making pit via the brine, and is reliably stored in the form of ice in the ice making pit. This makes it possible to sufficiently cope with low-temperature storage. In addition, after the endothermic reaction has been completed, the coolant that has become an aqueous solution can be recrystallized by drying in the sun in the summer.
Since it can be used again to generate cold heat during the warm winter months, the cost for the above-mentioned series of cold heat generation is hardly a problem.

Hereinafter, this invention will be explained in detail with reference to Examples.

"Embodiment" The figure shows an embodiment of the present invention, and reference numeral 1 in the figure indicates a space within the rock mass. An ice making pit 2 that is cooled by circulation of brine is installed in this rock space 1. Further, a storage tank 4 for the brine 3 to be circulated to the ice making pit 2 is provided outside the rock space 1, and a storage tank 5 for charging cryogen is formed above the brine storage tank 4. There is. These brine storage tank 4 and cryogen injection water storage tank 5 are thermally connected by heat pipes 6, 6 protruding into the outside air. The water storage tank 5 for adding a cryogen is filled with water, and a cryogen container 8 containing a cryogen 7 therein is floated above the water. In addition, this water storage tank 5 for charging cryogen
A coolant aqueous solution discharge pipe 9 with an on-off valve 9a is attached to the side of the tank 5, so that the aqueous solution in the water storage tank 5 can be led to the oven-fire drying container 10 through the pipe 9. In addition, the reference numeral 11 in the figure
1 indicates a brine circulation pump, and 12 indicates an expansion valve.

According to the above configuration, in the cold winter season, energy from outside cold air below freezing is supplied to the brine in the brine storage tank 4 via the heat pipes 6, 6, and this sufficient amount of cold energy is passed through the brine to make ice. The ice is sent into the ice making pit 2 and stored in the form of ice. On the other hand, in mild winters, although the cold air outside can create some ice in the water tank 5, it does not have enough cold energy to create enough ice in the ice making pit 2. . Therefore, in this case, the cryogen container 8 is overturned and the cryogen is poured into the water tank 5 in which some ice has formed. Then, the temperature inside the tank drops to below zero (-54.9℃ depending on the type of cryogen selected) due to the ice and cryogen in the tank, and enough cold energy is generated to form ice in the ice making pit 2. Occur. This cold energy is supplied to the brine by the heat pipes 6, 6, sent to the ice making pit 2 via the brine, stored in the form of ice, and can be used for low temperature storage in spring and summer.

In addition, after the endothermic reaction has completed, the coolant that has become an aqueous solution is led to a drying container in the summer to be dehydrated and crystallized, and can be used again when the winter is mild. Therefore, the running cost required to artificially generate cooling energy during the mild winter season is almost negligible.

In addition, although the said Example demonstrated the case where a storage place is a space in a bedrock, it is similarly applicable to the case where an above-ground building is used as a storage place.

"Effects of the Invention" As explained above, according to the energy-saving low-temperature warehouse for cold regions according to the present invention, the following advantages can be obtained.

(b) As long as natural ice is generated, it is possible to easily form ice for cold storage heat used for low temperature storage in spring and summer in the refrigerator even in mild winters.

(b) Depending on the type of cryogen selected, temperatures as low as -54.9°C can be easily obtained, so less power source is required for brine circulation.

(c) Since the cryogen can be reused, running costs are low.

(d) Since the cold energy transmission resistance of the heat pipe is reduced by the generation of cold energy through the use of a cryogen, the number of heat pipes in the cold receiving section can be reduced.

[Brief explanation of the drawing]

The figure is a configuration diagram of an embodiment of an energy-saving low-temperature warehouse for cold regions according to the present invention. 1... Space inside the bedrock, 2... Ice making pit, 3...
Brine, 4...Brine storage tank, 5...Water tank for adding cryogen, 6...Heat pipe, 7...Cryogen.

Claims (1)

[Claims] 1. A space within the bedrock or an above-ground building is used as a storage location, an ice-making pit is provided in the space within the bedrock or the above-ground building, and the ice is cooled by outside cold air and passed through brine to the outside of the space within the bedrock or the above-ground building. A brine storage tank is provided that sends cold heat into the pit, and the structure is such that it is cooled to sub-zero temperatures by ice making using outside cold air and cooling agent injection in the vicinity of this brine storage tank, and the brine storage tank is cooled to below zero through a heat pipe. An energy-saving low-temperature warehouse for cold regions equipped with a water storage tank for supplying cryogen to supply cold energy.