JPH0238869B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat storage type cold water generation device that can generate cold water and store cold heat without requiring driving power.

Obtaining cold water using a compression chiller or an absorption chiller requires power from a heat source, it is difficult to effectively utilize waste heat, and a separate heat storage tank is required to store cold heat. .

An object of the present invention is to provide a cold water generating device that does not require power from a heat source, can utilize waste heat, and can store heat.

As shown in the embodiments of the drawings, the cold water generator of the present invention comprises a container 2 loaded with a moisture absorbent 1, a heating means 3 for heating the moisture absorbent 1, and a cooling device for cooling the container 2. A moisture absorbent tank A equipped with means 4 and a heat insulating tank B consisting of a hollow container 7 formed by a heat insulating layer 6 are connected by interposing a condenser 8 and a regulating valve 9. It has a structure in which water is sealed in the system under vacuum while being connected by a pipe 10, and by inserting a water flow heat exchanger 11 in the insulation tank B, the water in the system is evaporated here. The water flowing through the heat exchanger 11 is cooled by the heat of evaporation during the cooling process, thereby obtaining cold water at a desired temperature.

To explain more specifically, the moisture absorbent 1 uses a solid moisture absorbent such as zeolite or silica gel,
This is loaded into the container 2. In particular, zeolite can be suitably used in the apparatus of the present invention since it has the property of being able to control the amount of water it retains simply by controlling the temperature. This moisture absorbent tank A has heating means for heating the moisture absorbent 1.
A hot water coil 3 is inserted. That is, a hot water coil 3 is disposed inside the container so as to exchange heat with the entire moisture absorbent 1 loaded in the container 2, and this hot water coil 3 is connected to a waste heat source (for example, boiler waste heat or factory waste heat). etc.) Hot water is passed from 12. The flow of hot water is started and stopped by opening and closing the control valve 5. Further, a water jacket 4 is attached to the outside of the container 2 as a cooling means for the container. This water jacket 4 communicates with a radiator 13 via a control valve 14 to form a closed circuit. Although a circulation pump 15 can be provided in this closed circuit to forcefully circulate the cooling water, it is also possible to circulate the cooling water naturally without a pump. In the case of natural circulation without a pump, the cooling operation of the container 2 is controlled by opening and closing the control valve 14, and the pump 1
5 is provided, the cooling operation is controlled by turning on and off the pump 15.

On the other hand, in the heat insulating tank B, the hollow container 7 is entirely surrounded by a heat insulating layer 6, and a heat exchanger 11 for taking out cold water is inserted into the hollow container.
This water flow heat exchanger 11 can be of the Finch-Ube type. This water heat exchanger 11
A temperature sensor 16 is attached to the outlet pipe line to detect the outlet water temperature. Further, the water flow to the water heat exchanger 11 is started and stopped by a control valve 17.

The moisture absorbent tank A and the heat insulating tank B are connected in a sealed manner through a connecting pipe 10, and a finned condenser 8 and a regulating valve 9 are interposed in the connecting pipe 10. The control valve 9 can also be controlled to open and close based on an instruction signal from a temperature sensor 16 installed on the cold water outlet side of the heat exchanger 11. 18 indicates a control device for this purpose. That is, the detection signal of the temperature sensor 16 is input to the control device 18, and the control device 18 operates the opening degree of the control valve 9 so that this input value falls within a set range. More specifically, if the input value is higher than the set value (if the outlet water temperature is high), the control valve 9
Open it more.

A predetermined amount of water is sealed in the thus configured closed system with air substantially removed. The amount of sealed water is such that it does not exceed the volume of the heat insulating tank B.

According to this device, the storage of cold heat and the extraction of cold water can be performed appropriately by the following procedure.

First, the heat storage operation is an operation in which hot water is passed through the heating means 3 and water adsorbed on the moisture absorbent 1 is desorbed.
When the control valve 9 is opened and hot water is passed through the heating means 3, the generated water vapor is condensed in the condenser 8 and stored in the heat insulating tank B. During this heat storage operation, the control valve 14 is closed, and if the pump 15 is provided, it is kept in a stopped state. When the amount of water in the heat insulating tank B reaches the standard amount, the control valve 9 is closed and the heat storage operation is completed.

When it is desired to take out cold water from this heat storage state (chilled water generation operation), the control valve 14 is closed and the flow of hot water to the heating means 3 is stopped.
Open the control valve 9 or drive the pump 15 to circulate cooling water through the water jacket 4 of the cooling means, and in this state open the control valve 9 to allow water to flow through the heat exchanger 11. taken out. That is, in this state, the water in the heat insulating tank B naturally evaporates, moves to the moisture absorbent tank A side, and is absorbed by the moisture absorbent 1.
The absorbed heat at this time is absorbed by the cooling water in the water jacket 4, and the cooling water in the water jacket 4 is radiated by the radiator 13 through forced circulation by the pump 15 or natural circulation without a pump.
On the other hand, on the side of the insulation tank B, the water passing through the heat exchanger 11 is cooled by the heat of evaporation of the stored water.
Cold water is produced. The temperature sensor 16 detects the temperature of the cold water at this time, and the temperature of the cold water can be controlled by controlling the opening degree of the control valve 9 using the control device 18. That is, when the control valve 9 is in the open state, the control device 18 is activated and the temperature sensor 16 is activated.
If the chilled water outlet temperature detected by the controller exceeds the set value, the opening of the control valve 9 is increased to increase the amount of steam generated, and if the chilled water temperature is below the set value, the opening of the control valve 9 is increased. Control is performed to reduce the amount of water vapor generated. Thereby, the cold water generation capacity can be suitably controlled.

As described above, according to the apparatus of the present invention, it is possible to produce cold water at the required temperature without requiring heat source power, and waste heat can be effectively used as the heat source, and cold heat can also be stored. It can achieve various effects that cannot be found in other devices, such as energy saving, equipment saving, and waste heat utilization.

[Brief explanation of drawings]

FIG. 1 is an equipment layout system diagram showing an embodiment of the apparatus of the present invention. 1... Moisture absorbent, 2... Container, 3... Heating means,
4...Water jacket, 6...Insulating layer, 7
...Hollow container, 8...Condenser, 9...Control valve, 1
0... Connecting pipe, 11... Water heat exchanger, 13...
Heat radiator, 14... Control valve, 16... Temperature sensor, A... Moisture absorbent tank, B... Heat insulation tank.

Claims (1)

[Scope of Claims] 1. A hygroscopic agent tank A consisting of a container loaded with a hygroscopic agent 1 and equipped with a heating means 3 for heating the hygroscopic agent 1 and a cooling means 4 for cooling the container.
and a heat insulating tank B consisting of a hollow container formed by a heat insulating layer 6 and in which a water heat exchanger 11 is arranged, are connected via a condenser 8 and a regulating valve 9. connected by a pipe 10, and
Water is sealed in the system under vacuum; a temperature sensor 16 for detecting the outlet water temperature is installed in the outlet pipe of the water heat exchanger 11, and the cooling means 4 is operated while the heating means 3 is in a rest state. A control device 18 is installed to control the opening of the control valve 9 based on a detection signal from the temperature sensor 16 during a cold water generation operation in which the water flow heat exchanger 11 is in operation and water is being passed through the water heat exchanger 11. A heat storage type cold water generator featuring: