KR19980025221A - Direct cooling fluid ice storage heat storage cooling system - Google Patents

Abstract

The present invention relates to ice storage heat storage cooling of a heat storage cooling system, to remove heat conduction generated through heat exchanger or ice maker secondary refrigerant during ice making formed by the freezer, to increase the heat storage density of the heat storage tank and to improve the load followability during cooling. It is an ice heat storage cooling system that eliminates the constraints of installation space and the mechanical drive.

To this end, the present invention is to pressurize the refrigerant at a low temperature by the refrigeration system with the refrigerant pulp to high-pressure injection into the Ejector installed in the heat storage tank so that the heat storage water is sucked through the suction tube of the ejector vacuum is formed and sprayed at the same time while the heat storage water by the latent heat of evaporation of the refrigerant When the ice is supercooled and regenerated and regenerated, the regenerated water defrosted by the cold water circulation pump is circulated by a heat exchanger to exchange heat with the cooling load side. At this time, the regenerated water that has become hot after cooling is interlocked with the cold water circulation pump to improve the freezing effect. It is an ice heat storage cooling system designed to have high ice making rate and heat storage density so that the inner valve is directly pressed into the ejector by automatic control.

Description

Direct cooling fluid ice storage heat storage cooling system

Ice heat storage cooling system is an application field of refrigeration cooling technology that uses midnight power for energy saving and efficient use by reducing initial investment cost of refrigeration equipment and load leveling of power generation equipment, and uses heat of fusion (79.68㎉ / ㎏) by phase change of water. It is a cooling system that uses cold heat through ice storage after cooling. It is classified into static ice making and dynamic ice making according to the ice making technology. The static ice making method is the secondary refrigerant inside the steel pipe or PE pipe. Ice on the outside of the pipe by directly circulating (Brine) or refrigerant to form cold ice (Ice On Coil Type) and the container filled with water or other phase change material in a circular or plate-type container There is a container type (Ice Capsule Type) for storing cold heat by making the inside of the container ice by allowing the secondary refrigerant to flow therebetween. This ice making method forms a thick ice layer from the beginning to the end of ice making, so the ice making performance is deteriorated due to the loss of heat conduction caused by the ice, and the heat storage space is limited due to the limit of heat storage density due to the static ice making method, and the limitation of securing the installation space is disadvantageous. there was. As the dynamic ice making method, the Ice Ice Type was developed, and the thermal performance of the existing system was improved by the periodic separation of the ice layers, but the ice maker must be installed on the top of the heat storage tank, and the height of the heat storage tank requires a certain space. There are more restrictions than the existing system, and the equipment and control of the ice making system is complicated, and the ice load and defrosting are repeated so that the load change of the compressor is large and there are disadvantages in terms of operating cost. Therefore, to compensate for the shortcomings of the existing system, it separates the heat storage tank and the ice maker and maintains a high evaporation temperature and directly returns the iced ice at 30% concentration without the loss of heat conduction in the thick ice layer. Slurry Ice Making System with excellent stress is developed as evaporation plate type, supercooled water type vacuum chamber type, etc., and it is commercialized or practically used. need.

The present invention eliminates heat conduction loss by cooling the refrigerant as a cooling body directly by heat-exchanging with the regenerated water to be cooled, in order to solve the above problems, and the installation of the heat storage system is not restricted according to the shape of the installation space in any structure of the structure. It is possible to improve the system performance coefficient without any mechanical driving part, and it does not need any special technology for maintenance and management, and it has a long life and high ice packing factor. The purpose is to provide.

1-Ice heat storage cooling system schematic diagram according to the present invention

2-Ejector structure diagram according to the present invention

Referring to the configuration and operation of the system by the accompanying drawings in detail as follows. Refrigerant gas compressor (Refrigerant Gas Compressor) of Figure 1 (1) is a high-temperature (65 ~ 85 ℃) high-pressure (14 ~ 18 kg / ㎠) refrigerant gas produced by compressing the refrigerant (trade name; R-22 chemical formula; CHCIF2) (2) Extruded into Water Cooled Condenser, (3) Cooled water (27 ~ 32 ℃) cooled by Cooling Tower is condenser by Cooling Circulation Pump of (4). Condensed into a high-pressure liquid at room temperature (40 ~ 45 ℃) while circulating inside, and is adiabaticly expanded through an expansion valve (5) called Float Chamber, and low temperature (-5 ~ -7.5 ℃) low pressure (2 ~ 3 kg / cm 2) of coolant liquid is stored in the low pressure accumulator (6). The stored low temperature low pressure refrigerant liquid is pressurized at a pressure of 6-8 kg / cm 2 by the refrigerant feed pump of (7) and installed on the upper part of the ice storage tank of (8) (9) Ejector of Figure 2 is extruded under the trade name (Fu-Jet). The pressurized refrigerant ejects the refrigerant into the heat storage tank by (1) the ejector nozzle of FIG. 2, and the suction suction pipe of FIG. 1 becomes a high vacuum by the ejection pressure and speed. 11) The regenerated water (Ethylele Glycol 7% Solution) is inhaled and mixed and sprayed together with the refrigerant. At this time, the ejector of FIG. 2 selects nozzle dia and (2) diffuser of FIG. 2 according to the required cooling capacity and the ice storage heat storage capacity so that the ratio of the ejection refrigerant amount and the suction regenerative water becomes 4 to 5.5. The refrigerant sprayed through the spray pipe (2) of FIG. 2 and the regenerated water become fine particles of small droplets of 1 to 2 mm. At this time, the refrigerant passing through the nozzle (1) of FIG. 2 is adiabaticly expanded due to the throttling phenomenon. It becomes the low temperature of -7.5-15 ℃, and the mixed heat storage water is made into small ice grains of -2.2 ~ -3.3 ℃ to be stored in the heat storage tank. At this time, it adds fluidity to fish ice, improves corrosion prevention and de-icing efficiency in the device, and adds an appropriate amount of corrosion inhibitor, bacteria remover, anti-foaming surfactant, etc. when Ethylene Glycol 7% is added to the regenerated water. After the heat exchanger is not dissolved in water, the refrigerant is evaporated and air flows to the top of the heat storage tank. At this time, the water separator returns to the low pressure receiver of FIG. 1 due to the pressure difference, and the water separator of FIG. And (18) Removed moisture from the Dryer Dryer and recovered with low pressure receiver. The recovered refrigerant gas is a completely sealed refrigeration ice storage system in which the refrigerant gas is sucked into the refrigerant compressor (1) of FIG.

The low temperature regenerated water regenerated through the above process is circulated in the cooling load side while circulating to the (1) Thermal Exchanger of FIG. 1 by the (12) Chilled Water Circulation Pump of FIG. After the heat exchange with the cooling load side, the regenerative water does not return immediately to the heat storage tank, but is connected to the cooling water circulation pump of FIG. 1 through (14) Solenoid Valve of FIG. After passing through the ejector, it becomes low-temperature fluid ice and is stored in the heat storage tank. At this time, the load control is controlled by adjusting the flow rate while the temperature sensor (15) and the temperature control valve (3-Way Temperature Control Valve) of FIG.

High efficiency and structural stability Simplicity has wide range of application for building cooling and industrial cooling system, which allows electricity providers to alleviate the burden of facility investment and operate efficient power generation facilities. Great effect is expected.

Claims (2)

In a system that generates and accumulates fluid ice in a heat storage cooling system Method of separating and cooling refrigerant after ice-making by mixing and spraying refrigerant and Ethylene Glycol 7% Solution by using Ejector during ice making A cold water cooling method that creates a low-temperature fluid ice by directly spraying the circulating cold water whose temperature rises during cooling to the heat storage tank by passing it through an ejector and mixing and spraying it with the refrigerant.