JPH04327745A - Ventilating and air conditioning equipment for emergency electric device room - Google Patents

Abstract

PURPOSE:To provide a ventilating and air conditioning equipment for emergency electric device room which can decrease outdoor air intake and protect HPCS room electric devices from salt damage. CONSTITUTION:In a ventilating and air conditioning equipment for an emergency electric device room 1 used for an atomic power plant, outdoor air volume restricting means 8, 9 and 10 which restrict outdoor air volume to be taken into the emergency electric device room 1 corresponding to energy generating volume in the room 1 are formed by communicating and arranging a duct 5 for intake and duct 5 for exhaust.

Description

[Detailed description of the invention]

[Purpose of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency electrical room ventilation and air conditioning system for ventilation and air conditioning of an emergency electrical room.

0002

2. Description of the Related Art FIG. 3 is a schematic diagram of ventilation air conditioning equipment in an emergency electrical equipment room 1 of a conventional high pressure core spray system (hereinafter referred to as HPCS system). Conventional HPCS systems are emergency electrical systems that do not have chilled water equipment belonging to the system. Therefore, the heat generated within the emergency electrical equipment room 1 is removed only by outside air.

[0003] That is, HPCS-based ventilation air conditioning equipment:
As shown in FIG. 3, it is composed of an air conditioner 2, an air supply fan 3, an exhaust fan 4, and a duct 5 that connects them. Ventilation in the room 1 is from an air supply port 6 to a duct 5, an air conditioner 2,
This is an all-outside air system in which outside air is taken in through the air supply fan 3. Further, all the air taken into the room 1 is discharged from the duct 5 through the exhaust fan 4 and the exhaust port 7. Therefore, the conventional HPCS system ventilation system is an all-outside air system and a one-through system.

0004

[Problem to be solved by the invention] Conventional technology requires a large amount of outside air intake, and since nuclear power plants are located near the sea, there are problems with salt damage such as corrosion of equipment in emergency electrical equipment rooms. Ta.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to provide an emergency electrical room ventilation air conditioning system that can reduce the intake of outside air and prevent salt damage to HPCS indoor electrical products. . [Structure of the invention]

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a ventilation air conditioning system for an emergency electrical equipment room used in nuclear power generation equipment, which adjusts the amount of heat generated in the emergency electrical equipment room. Emergency electrical equipment room ventilation, characterized in that an outside air amount limiting means for limiting the amount of outside air taken into the emergency electrical equipment room is arranged in communication with an air supply duct and an exhaust duct of the emergency electrical equipment room. Provide air conditioning equipment.

[0007]

[Operation] The recirculation method in the above-mentioned means is as shown in FIG. This is a ventilation method that minimizes the amount necessary.

Furthermore, in the bypass method, a bypass duct is provided as shown in FIG. 1, and the amount of bypass air is changed by the control damper 9b according to the amount of heat generated in the room 1, so that the amount of outside air taken in is the minimum amount necessary. It is a ventilation method.

In the variable air volume system, control dampers 9a and 9d are provided in the main duct 5 as shown in FIG. 1, and the amount of outside air taken in is changed according to the amount of heat generated in the room 1. It is a method. By such an effect, the amount of outside air taken into the room 1 can be restricted.

0010

Embodiment An embodiment of the present invention will be described below with reference to FIG. Note that in FIG. 1, the same parts as in FIG. 3 are given the same reference numerals, and the explanation of the configuration of the parts will be omitted.

In FIG. 1, a recirculation duct 8 is connected to a duct 5 that connects the exhaust fan 4 and the exhaust port 7, and the other end of the recirculation duct 8 is connected to the supply air via a control damper 9a. It is connected to a duct 5 that connects the port 6 and the air conditioner 2. In addition, an emergency electrical equipment room 1 and an air supply fan 4
A bypass duct 10 is connected to the duct 5 that connects the , the emergency electrical equipment room 1 is bypassed.

A temperature measuring device 15 is disposed at the exhaust port 7, and the amount of heat generated in the emergency electrical equipment room 1 is determined from the temperature measured by the temperature measuring device 15, and the amount of heat generated in the emergency electrical equipment room 1 is determined from the temperature measured by the temperature measuring device 15. controlling the opening degrees of a control damper 9c disposed in the duct 5 between the air outlet 6 and the air conditioner 2 and a control damper 9d disposed in the duct 5 between the exhaust outlet 7 and the exhaust fan 4; It is constructed to draw in the minimum amount of outside air necessary. Therefore, since the amount of outside air taken in can be reduced, the amount of salt taken in from the outside air can be reduced.

Furthermore, the opening degree of the control dampers 9a and 9b is controlled according to the amount of heat generated in the emergency electrical equipment room 1 determined by the temperature measuring device 15, and the opening degree of the control dampers 9a and 9b is controlled. Since the amount of recirculated air flowing through can be controlled, the amount of outside air taken in can be reduced to the minimum necessary amount, and the amount of salt taken in from the outside air can be reduced accordingly. Further, as another example, the amount of outside air taken in can be reduced by installing a cooling coil in the air conditioner 2 and cooling the taken outside air.

[0014]

[Effects of the Invention] By employing the above-mentioned means for the ventilation equipment in the emergency electrical equipment room of the HPCS system, the amount of outside air taken in can be reduced to the necessary minimum. Reducing the amount of outside air intake is nothing but reducing the amount of salt intake. Therefore, the present invention is effective in preventing salt damage.

FIG. 2 shows a comparison between the amount of salt taken in by the conventional method and the amount of salt taken in when the present invention is adopted. In FIG. 2, a solid line 11 indicates the amount of salt taken in by the conventional method, and a broken line 12 shows the amount of salt taken in when the present invention is adopted. As shown in Figure 2,
It can be seen that the amount of salt intake can be reduced by adopting the present invention.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram showing an emergency electrical room ventilation air conditioning system according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram of annual salt intake comparing the present invention and a conventional example.

FIG. 3 is a schematic system diagram showing a conventional example of emergency electrical room ventilation and air conditioning equipment.

[Explanation of symbols]

1...Emergency electrical equipment room
2...Air conditioner 3...Air supply fan
4...Exhaust fan 5...Duct
6...Air supply port 7...Exhaust port

8... Recirculation duct 9a, 9b, 9c, 9d... Control damper 10
...Bypass duct 15...Temperature measurement device

Claims (1)

[Claims] 1. A ventilation air conditioning system for an emergency electrical equipment room used in a nuclear power generation facility, comprising outside air amount limiting means for limiting the amount of outside air taken into the emergency electrical room according to the amount of heat generated in the emergency electrical room. An emergency electrical equipment room ventilation air conditioning system, characterized in that an air supply duct and an exhaust duct of the emergency electrical equipment room are arranged in communication.