JPS60223967A - Heat accumulation type air-conditioning system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of application of gmei) The present invention relates to a two-conditioning system using a heat storage tank for ice making, and in particular to a regenerative air conditioning system suitable for extracting a cold source from a heat storage tank for ice making. .

[Background of Brother Akira]

FIG. 1 shows a system diagram of a conventional regenerative air conditioning system. In the figure, 1 is a chiller unit, 2 is a W heat II,
3 indicates an air conditioner such as a fan coil unit or air handling, a circulation pump that circulates between the brine cooler 4 and the heat storage tank 2 in the chiller unit 1, and 8 a cold water circulation pump that circulates cold water in the chilled water circuit 6. .

In this air conditioning system, the amount of circulating cold water in the cold water circuit 6 is constant, so when the freezing state in the heat storage tank 2 is in the initial state, low temperature cold water comes out, but near the end, it becomes high temperature cold water. , there is a problem that the load does not necessarily match the load of p1 machine 3.

[Purpose of the invention]

The purpose of the present invention is to provide a heat storage type air conditioning system that can efficiently consume cold water stored as heat using inexpensive nighttime electricity in proportion to the load of the air conditioner. In order to achieve this, a chiller unit equipped with the heat storage holes of the present invention, a heat storage tank for ice making, and an air conditioner such as a fan coil unit and an air handling unit are provided, and the cooler for brine and the heat storage tank for ice making are equipped with an air conditioner such as a fan coil unit and an air handling unit. On the other hand, the cold water cooler, ice-making heat storage tank, and air conditioner constitute a cold water circuit that circulates cold water to the air conditioner, ice-making heat storage tank, cold water cooler, and air conditioner. A bypass circuit connecting the population side and the outlet side of the ice-making heat storage tank is provided in the cold water circuit, and a first flow i regulating valve is provided on the inlet side of the ice-making heat storage tank in the cold water circuit, and a first flow i regulating valve is provided in the bypass circuit. A second flow control valve is provided, and a detector is provided to detect the artificial side water volume of the cold water cooler, and when the artificial side water volume of the cold water cooler is less than the set value of the detector, the first
The flow rate control valve is closed, the second flow rate control valve is opened, and when the water temperature exceeds a set value, the first flow rate control valve operates in the direction of opening, and the second flow rate control valve operates in the direction of closing. It is characterized by being configured as follows.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIG. FIG. 2 shows a system diagram of a regenerative air conditioning system according to the present invention. This air conditioning system includes a chiller unit 11 provided with a chilled water cooler 212 and a brine cooler 13;
It includes an ice-making heat storage tank (hereinafter simply referred to as a heat storage tank) 14 and an air conditioner 15 such as a fan coil unit and an air handling unit. The brine cooler 13 and the heat storage tank 14 constitute a brine cooler circuit 16, while the cold water cooler 12, the heat storage tank 14, and the air conditioner 1
5, a cold water circuit 17 that circulates cold water in the order of air conditioner 15, heat storage tank 14, cold water cooler 12, and air conditioner 15 is connected to 11.
1I has been completed. 18 is a brine circulation pump that circulates the medium in the brine cooler circuit 16; 19 is a cold water circuit 17;
This is a cold water circulation pump that circulates cold water. Further, the cold water circuit 17 is provided with a bypass circuit 20 that connects the population 1-II of the heat storage tank 14 and the outlet side. In addition, a first flow control valve 21 is provided on the heat storage tank 14 population side of the cold water circuit 17, and a second flow rate control valve 22 is provided on the bypass circuit 20, and on the cold water cooler 120 population side, A detector 23 is provided to detect the water width of the inlet. When the -212 artificial water volume for cold water is less than the set value of the detector 23A, the first flow control valve 21 is closed, the second flow control valve 22 is opened, and the water temperature is higher than the set value. When this happens, the first it sea bream valve 21 operates in the opening direction, and the second flow rate control valve 22 operates in the closing direction.

Next, the operation of the present invention will be explained.

First, the brine cooler circuit 1 is installed using cheap nighttime electricity.
6 is operated to store heat in the heat storage tank 14 as ice. During the day, the chilled water circuit 17 is operated to circulate chilled water and perform cooling operation. In this cooling operation, when the cooling load is small, the return temperature of the cold water, that is, the cold water cooler 21
Since the population side water volume of 2 is lower than the set value of the detector 23,
The first flow body regulating valve 21 is closed, the second flow i regulating valve 9f22 is opened, and the cold water bypasses the heat storage tank 14 and circulates as shown by the solid arrow. The cooling load increases, and the return temperature of chilled water increases.
That is, the water temperature on the inlet side of the cold water cooler 120 operates in the direction in which the detection valve 22 closes, and a portion of the cold water exiting the air conditioner 15 flows to the heat storage tank 14 as indicated by the broken line arrow, and is cooled in the heat storage tank 14. be done. The valve opening degrees of the first flow rate control valve 21 and the second flow rate control valve 22 are appropriately adjusted by the detector 23 according to the return temperature of the chilled water, so that the air conditioner 15 receives chilled water at a temperature commensurate with the cooling load. Always supplied stably.

〔Effect of the invention〕

As explained above, according to the present invention, the following effects can be obtained.

(1) Chilled water of a degree suitable for the cooling load is used as part of the air conditioning transportation during the daytime, so cooling can be performed only by operating the chilled water circuit during the daytime, resulting in power savings.

(3) Since the peak cooling load can be supplemented with cold water from the heat storage tank, the capacity of the chiller unit can be made smaller.
That is, the chiller unit can be made smaller.

[Brief explanation of drawings]

FIG. 1 shows a system diagram of a conventional regenerative air conditioning system, and FIG. 2 shows a system diagram of the regenerative air conditioning system of the present invention. 11... Chiller unit 12... Cold water cooler 21
3... Cooler for prine 14... Heat storage tank for ice making 1
5... Air conditioner 16... Brine cooler circuit 17.
...Cold water circuit 20...Bypass circuit 21...First flow rate control valve 22...Second flow rate control valve 23...
detector

Claims (1)

[Claims] A chiller unit equipped with a cold water cooler and brine cooler, a heat storage tank for ice making, a fan coil unit,
The brine cooler and the ice-making heat storage tank constitute a brine cooler circuit, while the cold water cooler, the ice-making heat storage tank, and the air conditioner are equipped with an air conditioner such as an air handling unit. A chilled water circuit is configured in which the ice making heat storage tank, cold water cooler, and air conditioner are circulated in this order, and the nuclear chilled water circuit is provided with a bypass circuit that connects the population side and the outlet side of the ice making heat storage tank, and the chilled water circuit is used for ice making. A first flow rate adjustment valve is provided on the population side of the heat storage tank, a second flow rate adjustment valve is provided in the bypass circuit, and a detector is provided to detect the water temperature on the inlet side of the cold water cooler, so that the water temperature on the population side of the cold water cooler is When the water temperature is below the set value of the detector, the first flow control valve is closed and the second tN, ik control valve is opened, and when the water temperature is above the set value, the '41 flow rate valve is operated in the direction of opening, A regenerative air conditioning system characterized in that the second fFt and the amount adjustment valve are configured to operate in the closing direction.