Application of energy consumption monitoring system in the office building of Bank of China Anhui Branch

Ankerui Electric Co., Ltd. Shanghai Jiading 201801

【Abstract】 In view of the high energy consumption and unreasonable energy management of large public buildings, the use of computer network technology, communication technology, measurement control technology and other information technology to achieve accurate classification of energy resources and energy resource operation supervision functions, Clearly describe the current energy consumption status of the building; monitor the power parameters such as voltage, current and power of each power supply circuit in real time, identify the effective load and the invalid energy consumption, so that the building can be effectively energy-saving through technical or behavioral energy-saving methods.

[Keywords]: banks; large public buildings; energy saving; energy consumption;

0 Preface

With the development of society, the consumption of energy is also growing rapidly. In particular, the growth of building energy consumption is particularly rapid, and it has become the third largest energy consumption in addition to industry and transportation. According to the current development trend of the construction industry, the energy output of the society will not be able to meet the energy demand after a certain number of years, so reducing the energy consumption is a very important issue that needs to be solved as soon as possible. In the energy consumption of buildings, the energy consumption of large public buildings occupies a large share. Although the total energy consumption is far less than the consumption of residential buildings, the energy consumption per unit area is very large, so the large public buildings Energy saving work has great potential. The construction of large-scale public building energy consumption monitoring system enables people to fully understand the energy consumption of large public buildings, and lay the foundation for proposing effective energy-saving and emission reduction policies and decisions. With the advancement of China's urbanization process and economic development, China The total energy consumption of buildings has continued to grow, and the growth rate is getting faster and faster. If the building energy consumption is allowed to grow at this speed, it will inevitably bring great pressure on China's energy supply security. Therefore, building energy conservation is imperative.

Taking the office building of Bank of China Anhui Branch as an example, this paper introduces the application of energy consumption online monitoring system in large-scale co-construction and banking through the construction, data collection and analysis of data transmission network of energy consumption online monitoring system.

1 Project overview and construction goals

Bank of China Anhui Branch Business Office Building is located at the northeast side of the intersection of Yinzhou Avenue and Yungu Road, Binhu New District, Hefei City, Anhui Province. The total construction area of ​​the project is 77583.300 square meters, the total height of the building is 180 meters, and the total number of floors is 39 floors. According to the overall design concept of the building and the requirements of energy saving and environmental protection, the metering device is installed in the floor distribution box, and the computer energy and energy management software are used to realize the sub-metering of building energy. The specific construction objectives are as follows:

Realize the energy consumption data of the entire business office building;

Clearly describe the current energy use status, identify problems in energy management, and provide directions for improvement in energy management work;

Enable the logistics management department to effectively monitor and manage the energy system of the business office building;

Provide reference data for research, design and construction of energy saving.

Comprehensive energy consumption: automatic, real-time, online data collection, transmission and storage of bank power consumption.

Sub-item measurement: The electric energy consumption should be subdivided according to the type of electricity consumption : electricity for lighting and socket, electricity for air-conditioning, power for power, and other special electricity.

2 Design of energy consumption online monitoring system

The design of the entire energy consumption online monitoring system is based on the “Technical Guidelines for Energy Consumption Data Transmission of State Office Buildings and Large Public Buildings Energy Consumption Monitoring System” and “Technical Specifications for Energy Monitoring System of Local Standard Public Buildings in Anhui Province”. Based on the technical guidelines, an online energy monitoring system that meets the actual needs of users is constructed. The entire system completes the installation of internal energy consumption meters and energy consumption data collection devices in the bank office building, enabling the collection of energy consumption data from the building and remote transmission. Data, data statistics and display capabilities. The whole system includes the original collection of energy consumption data, the online transmission of energy consumption data, and the online analysis and diagnosis of energy consumption data. The original collection of energy consumption data is realized through the installation of energy consumption metering device; the installation of communication management machine is realized. Online transmission of energy consumption data; through the collection of energy consumption data, form a visualization trend, determine the cause of high consumption in the diagnosis of higher energy consumption range; improve the operation and management mode through the later configuration of energy-saving and energy-saving products, and save energy and reduce consumption; Compare the data before and after energy saving and consumption reduction, and check the implementation effect of energy saving and consumption reduction.

2.1 Raw collection of energy consumption data

The original collection of energy consumption data is the basis of the entire energy consumption online monitoring system, and is the basic component of the entire energy consumption online monitoring system. It refers to the division of main energy types consumed by state offices and large public buildings. Data refers to one or more categories of classified energy consumption data subdivided into several items. For example, electric energy can be divided into four categories, socket lighting, air conditioning, special electricity and power, and each sub-item can be subdivided into several sub-items. The power for socket lighting includes the lighting of the main working area inside the building, and the electricity used for ordinary equipment. It can be subdivided into three parts: socket lighting, emergency lighting and corridor lighting, and outdoor lighting. Air-conditioning electricity mainly refers to the electric energy consumed for cooling and heating inside the building. It also includes two sub-items, the use of electric energy in the hot and cold station and the use of electric energy at the end of the air conditioner. Power consumption is the power used to provide power services in the building, including three items: elevator power, water pump power, and fan power. These classified item data are calculated and stored inside the collector, and a connection is established with the data center to transmit the original data. In this project, the energy consumption information involved mainly includes power consumption. According to the design requirements of classification and sub-metering systems, the electricity metering in this building adopts multi-function watt-hour meter, lighting distribution box and air-conditioning in each floor. Multi-function electric meters are installed in electric boxes, power distribution boxes and other special power distribution boxes to realize the sub-item collection of electric energy.

The multi-function meter adopts AC sampling technology, which can measure the current, voltage, power, power factor and electric energy parameters in the power grid separately. The multiplier can be set by the panel membrane switch. With RS-485 communication interface, using Modbus-RTU communication protocol, all multi-function meters have an active energy measurement accuracy of 0.5.

2.2 Data transmission

Data transmission refers to the process of uploading raw energy consumption data from a discretely distributed building group to a data center via a data collector through a remote communication method such as the Internet or GPRS, and processing the data to complete the original data storage process. . In the process, the data collector accumulates the regularly collected data to form a data packet in an Extensible Markup Language (XML) format, and the data packet includes not only the data to be uploaded but also the corresponding building information and collector information. . The collector also encrypts the data packets to be transmitted, and generally uses 128-bit aes encryption to ensure data security and upload work. The data transmission network of the whole system includes the 485 network between the on-site metering acquisition device and the collector, and the Ethernet between the collector and the data center. The on-site metering acquisition device and the collector pass the RS-485 bus mode to realize the metering acquisition. The hand-in-hand connection is installed, and finally the collector is connected. The number of measuring devices for each 485 bus connection is about 20; the remote transmission of data is realized between the collector and the data center through the intelligent internal network of the building. The network structure of the system is shown below:

2.3 Software function design of energy consumption online monitoring system

Energy consumption integrated main interface

Through the comprehensive energy consumption main interface, it can reflect the comprehensive energy consumption of the energy consumption of the business office building and the conversion to standard coal in the current year, and calculate the energy consumption per unit area; the energy consumption curve of the day is displayed at the bottom of the interface; Click on the upper area of ​​each classified energy consumption to jump to the main energy analysis main interface of the classified energy consumption; the building can be switched through the drop-down box.

Itemized electricity statistics

The electricity consumption is measured hour by day, day by day, month by month, and yearly. The statistical data uses various graphic display methods such as pie chart, bar chart, line chart and area chart to visually reflect the numerical values, trends and distribution of various statistical data.

Trend analysis of power branch

Count the power consumption of various regions and equipments, accurately locate the key circuits for electricity consumption, formulate an energy-saving performance appraisal system, and promote the effective and effective implementation of energy conservation and consumption reduction. In order to establish operational record files with key equipment, long-term tracking and recording of energy efficiency analysis and evaluation results during equipment operation, combined with equipment maintenance records, provide a basis for equipment operation and maintenance.

Energy consumption data with the same ratio analysis

The energy consumption of various types and major energy-consuming equipments was compared with the same period last year and the previous month value, and the energy-saving effect was tested. The energy-saving performance assessment and the improvement of energy-saving targets were performed based on the analysis results.

Energy consumption data time-sharing statistics

The energy type, load type, and regional energy consumption are differentiated according to time, and the energy consumption data is comprehensively analyzed on time, day, month, year, weekday, non-working day, etc., to accurately grasp the specific consumption of energy. It can be used to set peaks, flats, and valleys according to time of day, and count energy consumption in each period to reduce idle energy consumption.

Real-time monitoring and early warning of energy data

Through high-precision intelligent instruments, automatic real-time, high-density real-time energy monitoring can be realized by technical means to reduce the "run, run, drip, leak" and measurement error of energy use. Real-time monitoring of the return data of the field instrument, reasonable control and early warning of the electric energy, timely detection and correction of the abnormal power consumption in the operation, and processing at any time. Set the over-alarm warning value of important equipment as needed, and highlight the alarm when it exceeds the standard and record it actively.

3 Significance of the construction of energy consumption online monitoring system

The large-scale public building energy consumption monitoring system is a multi-level, multi-functional, multi-regional, cross-regional, two-way exchangeable information complex system designed in accordance with the relevant technical guidelines for the construction of energy storage monitoring systems for state offices and large public buildings. By constructing such an energy consumption monitoring system, it is possible to monitor the energy consumption of buildings in real time, through the classification and calculation of energy consumption data, the time-sharing statistics of data, and the public display platform, which can promote the improvement of office buildings and large public buildings of state organs. The level of energy-saving operation management provides reference and strong support for government agencies to formulate effective policies and decisions, and implements on-line measurement, dynamic monitoring, centralized management, and scientific assessment of the electricity consumption of each energy metering point by the integrated energy management system software. Through effective end-of-end monitoring and management, comprehensive energy saving is realized comprehensively, which provides a basis for further energy-saving renovation of high-energy buildings.

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