Ankerui Huanan
Abstract: The total area of large public buildings is less than 4% of the total urban building area, but the total energy consumption accounts for 22% of the total urban electricity consumption in the country. 10 to 20 times of that. Public buildings are major energy-saving households and the core of energy conservation. Doing a good job in energy-saving work in public buildings is of great significance to promoting and driving energy-saving work in the whole society, achieving energy-saving and emission reduction goals, and implementing the major strategy of "changing modes and adjusting structures". This article introduces the energy consumption analysis and management system of Xinjiang Changji Municipal Administration Center Project, which collects on-site power meters, water meters and gas meters. The system realizes the monitoring and analysis of the electricity consumption of the entire government affairs center office building.
Key words: office building; energy consumption monitoring system; ACREL-5000.
1
introduction
At present, my country is already the world's second largest energy producer and consumer. Statistics show that my country's building energy consumption accounts for about 28% of the country's total energy consumption. Of the 2 billion square meters of buildings newly built each year in my country, 99% It is a high-energy-consumption building; while only 4% of the existing buildings have adopted energy-saving measures. Large-scale public buildings not only have high energy consumption density, but also have serious energy waste, and have huge energy-saving space. The promotion of building energy conservation is imperative, and energy conservation and consumption reduction should be measured first.
Vigorously carry out green building actions, and guide urban and rural construction with green, circular, and low-carbon concepts, which is conducive to improving the efficiency of resource and energy use and alleviating the tension between supply and demand of resource and energy; it is conducive to reducing the total energy consumption of the society, reducing pollutant emissions, and ensuring the completion of energy conservation and reduction. It is conducive to promoting the optimization and upgrading of the construction industry, cultivating strategic emerging industries such as energy conservation and environmental protection, and new energy; it is conducive to improving the comfort and health of buildings and improving the production and living conditions of the masses. All levels and departments should take the green building action as an important part of vigorously promoting the construction of ecological civilization, further enhance the sense of responsibility and urgency, make overall plans, pay close attention to implementation, and promote urban and rural construction to embark on a green, circular, and low-carbon scientific development track , to promote economic and social coordination and sustainable development.
2
Design Basis
GB-T 15587-2008 "Guidelines for Energy Management of Industrial Enterprises"
"Guidelines for evaluating the rational use of electricity in enterprises GB"
"General Rules for Enterprise Energy Conservation Planning"
"General Rules for Enterprise Energy Audit Technology-GB"
GBT23331-2009 "Energy Management System Requirements"
GB-50052-2009 "Code for Design of Power Supply and Distribution System"
uNational and industry standards for energy consumption metering devices
DL/T 645-1997 Communication protocol for multi-function electric energy meters
DL/T 645-2007 Communication protocol for multi-function electric energy meters
CJ/T 188-2004 Technical Conditions for Data Transmission of Household Metering Instruments
GB/T 19582-2008 Industrial automation network specification based on Modbus protocol
3
Project Overview
Xinjiang Changji Municipal Affairs Center Project is located at No. 231 Dingbian West Road, Changji City, Changji Hui Autonomous Prefecture, Xinjiang. There are 170 electricity meters, 3 water meters and 3 remote gas meters on the floor of this project. This project needs to monitor and measure different functional equipment such as lighting, air conditioners, water pumps, and elevators. At the same time, each floor introduces lighting power supply and power supply separately to measure lighting and air conditioning power consumption. Therefore, according to the nature of this project, a set of energy consumption system is designed, and a communication management machine is installed in the control room on the third floor and the electric well on the third floor to collect data from the electric meter, water meter and gas meter on the floor. Data transmission is carried out from the well to the background host of the fire control room on the third floor through network cables. After the data of the electric meter is collected, it is analyzed and displayed according to the principle of energy consumption classification and sub-item.
The focus of this project is to solve the intelligent, automated, visualized, and quantifiable collection and storage of basic energy consumption data; establish an energy management platform to realize centralized management of energy; deeply analyze energy consumption processes and trends; establish energy consumption monitoring and publicity platform. Through the unified and comprehensive management of electricity, water, and gas consumption of the government affairs center office building project, it is possible to query and analyze the energy usage of equipment in each area, helping managers discover potential energy-saving opportunities, improve energy utilization efficiency, and manage scientifically and effectively Energy usage, thereby reducing energy usage costs, and playing a role in building a conservation-oriented society.
4
system structure
Acrel-5000 building energy consumption analysis and management system uses workstation host, communication equipment, and measurement and control unit as basic tools to provide a basic platform for real-time data collection and remote management of large public buildings. It can communicate with other building automation systems Forwarding constitutes a complex monitoring system. The energy consumption system mainly adopts a layered distributed computer network structure, as shown in the system structure diagram:
System Structure Diagram
5
System software module
uComprehensive energy consumption main interface
Reflect the energy consumption of each category of building energy consumption in the year and the comprehensive energy consumption converted into standard coal, and calculate the energy consumption per unit area;
The energy consumption is mainly measured by the meter, and the hour-by-day energy consumption curve of the electric energy is displayed at the bottom of the interface; click the upper area of each category of energy consumption to jump to the main interface of the energy consumption analysis of the category;
The building can be switched through the drop-down box, and the building picture can be replaced according to the project requirements;
u classification energy consumption main interface
Reflect the energy consumption and comparison, growth percentage and added value of a category of energy consumption (such as electricity, water, gas) on the same day and the same period yesterday, the same month and the same period of the previous month, the same period of the current year and the same period of the previous year;
Reflect the energy consumption trend of a certain category of energy consumption in the past 48 hours, the past 31 days, the past 12 months, and the past 3 years;
A pie chart of the current month’s energy consumption reflecting a specific energy consumption item;
It reflects the year-on-year analysis chart of energy consumption of a certain category in each month of the year;
u Classified energy consumption branch energy consumption statistical report
The branch can be flexibly selected, and the daily, monthly, weekly, quarterly and annual energy consumption of the branch can be counted within a certain period of time;
Through the powerful function of the pivot table, users can perform various data statistics and combine and sort the data;
Statistical data can be displayed in a variety of charts such as histograms, point-line charts, stacked charts, and pie charts;
Statistical data can be exported to Excel;
u Classified energy consumption branch non-working day energy consumption
Statistics on the energy consumption of each branch on working days and non-working days, non-working days can be flexibly set through the system
Statistical data can be exported to Excel;
Year-on-year analysis of u classified energy consumption branches
Statistics of the monthly energy consumption of each branch road in the current year and the energy consumption in the same period last year;
uClassified energy consumption branch energy collection copy
Query the meter readings of each branch at any two times, and calculate the difference;
Time accuracy to minutes;
Analysis of energy consumption trend of u classification energy consumption branches by time period
You can query the energy consumption parameters (such as voltage, current, power, power factor, etc.) of any branch within a certain period of time. The specific parameters that can be queried are related to the installed instruments and system configuration, and the query cannot span months;
The data is displayed in the form of charts or tables, and the charts can be zoomed in, zoomed out, and moved by mouse operations; the data can be sorted (Max, Min);
Data can be exported to Excel;
u Sub-area energy consumption main interface
uconfiguration options
Configure the basic information of the building in accordance with relevant technical specifications, such as: building function, building area, air-conditioning area, building address, etc., among which building area and other information will analyze energy consumption per unit area;
Configure basic information such as the type, model, and manufacturer of the meters used in the project, and add the monitoring parameter information that this type of meter can provide. The configuration here affects energy consumption statistics, time-based energy consumption statistics, and parameter query functions;
Configure all the measuring instruments used in the project, save the address, transformation ratio, corresponding collector, code, name of the monitoring circuit and other information of the measuring instruments;
配置分项能耗统计时涉及到的计量表计、所占比例、运算方式等信息，可根据项目情况灵活配置，此处配置信息将影响各分类能耗分项用能分析小模块中的功能；
配置各部门用能对应的计量仪表、运算方式、所占比例以及部门用能计划，完成此项配置后将启用部门能耗分析功能模块；
配置建筑物中某用能区域对应的计量仪表、运算方式、所占比例，完成此项配置后将启用区域能耗分析功能模块
6
系统建设的意义
计量装置设计安装 能效监测平台搭建
通过梳理用户的用能网络，在各配电回路设置电能计量表计，以及通过对水表，气表的数据监测，为该项目搭建完整的用能计量体系。管理人员就可以通过软件对项目内用水，用电，用气等用能做实时的监控，同时能够减少用能的“跑、冒、滴、漏”和计量误差。实时监视现场仪表的回传数据，对能耗进行合理的管控和预警，及时发现并改正运行中存在的能耗异常，随时处理。按需设置重要设备的超标预警值，超标时醒目提醒并主动记录。
用能数据采集存储 形成可视化趋势图
通过软件可以直观的看到各部门或区域的每小时用能的趋势曲线图，同时对各仪表采集回来的数据进行实时存储，可以查询历史的数据记录。
确定高能耗范围 诊断形成高耗原因
统计各区域、各楼层能源消耗，准确定位能源消耗大户，制定节能绩效考核制度，推动节能降耗的有效执行。为用能设备建立运行记录档案，结合设备维护保养记录，为设备的运行维护提供依据。
配置节能节电产品 改进运营管理模式
长期跟踪记录设备运行过程中的能效分析评估结果，关注用能走向，为节能改造提供可靠的数据支撑，在经过节能改造之后，根据能耗监测平台对比节能实施效果。