Case study of refrigeration system in Bank room

Financial center Air conditioning system is divided into: computer room precision air-conditioning system for data room, power room and other key places, for important key equipment to provide precision control of the constant temperature and humidity environment, to ensure the normal work of equipment. Comfortable air-conditioning and fresh air system for the monitoring room, work area, etc., mainly for the staff to provide a comfortable working environment.

First, the Bank computer room system Overview

Bank engine room Power equipment includes: Low-voltage automatic switching system, low-voltage distribution system, computer room lightning protection and grounding system, AC uninterruptible power supply system, room environment regulation system, dynamic equipment and environment http://www.aliyun.com/zixun/aggregation/23104. HTML "> Monitoring system, etc., in the part of the use of DC power transmission equipment, such as the financial room, also need to join the DC uninterrupted supply system.

1.1 Typical Bank room schematic diagram

Fig. 1. Schematic diagram of the Bank room

Low-voltage automatic switching system

Data devices

AC Uninterruptible Power supply system

Low Voltage distribution System

Air conditioning system

DC Uninterruptible Power supply system

Power equipment and environmental monitoring system

Low-voltage distribution system of computer room environment

Mains input

Alternate input

Lightning protection and surge prevention system

1.2 Typical layout Chart of bank room

Ii. Air Conditioning system

Financial center Air conditioning system is divided into:

1 room precision air-conditioning system for data room, power room and other key places, for important key equipment to provide precision control of the constant temperature and humidity environment, to ensure the normal work of equipment.

2 comfortable air-conditioning and fresh air system for the monitoring room, work area, etc., mainly for the staff to provide a comfortable working environment. Hiross is the world's first development and production of precision air-conditioning factory room manufacturers, in 1964 developed the world's largest thermostat and humidity precision special air-conditioning, creating a world-room precision air-conditioning precedent. Today, Hiross provides more than 200,000 sets of precision air conditioners worldwide to protect the safe and reliable operation of important equipment around the world.

Bank computer room applications, usually host room area <200m*m, recommended selection of Hiross Himod series room precision air-conditioning. Himod Series Precision Air-conditioning is designed and manufactured for the precision electronic equipment used in data room, communication room and computer room. Its refrigeration capacity range from 20kw~101kw, modular type can be flexible combination, fully meet the high standards of the bank room.

Precision Air Conditioning capacity selection:

A the server/data Equipment room estimate: In a medium-sized financial room, data equipment room usually less than 200 square meters, in the data equipment, room building heat is not determined, can be in accordance with the general method of estimating the financial room air-conditioning refrigeration capacity estimates: 500w~600w/square meters, Some of the high-capacity room to 800w/square meters.

For example, the area of the data room is 200 square meters, the required refrigeration capacity is about 100kw. 2 single unit refrigeration capacity of 58.7kw 55UA air-conditioning, the total refrigeration capacity of 117.4kw, to meet the requirements. To ensure the reliability of the equipment, add a redundant unit, a total of 3 units. When the machine room equipment, maintenance structure to determine the calorific value of the equipment, maintenance area of the thermal accounting, adjust the configuration of air-conditioning.

Comfort Air Conditioning Choice: If the building does not have central air-conditioning, it is recommended that the cabinet-type ordinary air-conditioning or household central air-conditioning, for staff to provide a comfortable working environment, its capacity based on the area of choice.

A) Battery room: In order to protect the performance of the battery, the temperature of the battery room must be between 20-25 degrees, the proposed selection of 2 3P cabinet air-conditioning, two air-conditioning rotation work.

b monitoring room, work area, etc.: according to the size of the choice of air conditioning and model.

Iii. Air Conditioning system

Hiross Himod Series designed for computers, servers, switches and other key equipment, highly reliable, excellent refrigeration performance and easy maintenance design, for a variety of small, medium to large room or data center to provide a sound temperature, humidity control, to ensure that the operation of the environment sensitive electronic equipment work reliability.

1) Features:

Design method:

The wind is designed to take away the calorific value of the machine. Higher evaporation temperature (14 ℃), smaller temperature drop, higher compressor efficiency, the effect ratio as high as 96.8%, basically for the wet cooling;

All-closed rotary compressors, high efficiency, low noise, less leakage point and maintenance (compared to semi-closed or piston compressors).

Evaporator using Non-stick water coating surface treatment technology, making heat exchange more direct and efficient, the machine energy efficiency ratio as high as 1:4.

Large evaporator area, so that low wind speed and low pressure drop can be achieved.

Small footprint, save room valuable space, all positive maintenance, equipment, reliable wall placement. The world's original radial centrifugal direct drive fan, located in the middle of the air-conditioning, the lower part of the air-conditioning as a static pressure box to avoid noise, to prevent the fan set at the bottom of the direct blow to the ground caused by air disturbances.

Wind pressure in the field continuously adjustable, ranging from 20Pa to 350Pa, to meet a variety of air supply environment.

Compared with the belt type fan: more efficient-negligible transmission loss; low noise-smaller vibrations; less maintenance-no need for periodic replacement of belts and necessary belt adjustments; cleaner room-Belt mill dust (very harmful to machines and personnel) will be brought into the room with the air supply.

Electrode humidification: High efficiency ... More than 90% humidity control accuracy ... Fast response time and suitable for general water quality.

Contrast infrared humidification: Low infrared humidification efficiency-60%, slow response, expensive replacement parts, a certain demand for water quality.

Contrast Ultrasonic humidification: Ultrasonic humidification is caused by the air mist on the equipment harmful, and easy to cause bacterial breeding.

Modular Design:

more efficient operation. The heat transfer is limited to the minimum due to the isolation of the heating parts (compressors, humidifier, etc.) inside the machine.

Can be maintained while the device is running. Isolation of the air duct from the component unit;

A static pressure box is designed to reduce airflow disturbance and reduce the noise index. New control (using Hiromatic Intelligent Graphics Controller).

The more friendly man-machine conversation function, provides the intuitive operation condition, the precise control temperature and humidity change.

Provide 20 pages of 60 records of the status report, night and holiday automatically perform low-power operation, energy saving, prolong equipment life, up to 128 networking;

2 Various cooling modes:

Air Cooling System:

In order to ensure the reliable and efficient operation of the whole system, it is necessary to match the suitable air condenser according to the outdoor ambient temperature. In order to prevent the transportation of moisture and debris intrusion, the unit has been in the factory prior to filling in the dry nitrogen. In the installation of the Unit should pay attention to the unit's trachea and liquid tube, according to the condenser installation distance, choose the appropriate specifications and refrigeration requirements of the copper tube.

Water cooling System:

The water condenser equipped with volume regulating valve is installed in the indoor host, according to the number of the host module and the refrigeration capacity to choose the appropriate cooling tower with the use.

Ethylene glycol cooling system:

As with water-cooled system, condenser installed in the indoor mainframe, the different units are equipped with separate cold and cold. When the outdoor ambient temperature is below the "0" degree Celsius, it is necessary to add different concentrations of ethylene glycol solution in water. Each indoor unit can be equipped with a set of pumps and cold, you can also use the "main standby" machine replacement mode.

Chilled water System:

Chilled water system is in the indoor host equipped with frozen water coil tube, chilled water chiller provided as a cold source, the room for constant temperature, humidity control.