At present, China is already the world ’s largest energy producer and consumer. Statistics show that China ’s building energy consumption accounts for about 28% of the country ’s total energy consumption. Of the 2 billion square meters of new buildings in China each year, 99% are high-energy buildings. ; Of the existing buildings, only 4% have adopted energy saving measures. Large-scale public buildings not only have high energy density, but also have serious energy waste and huge energy-saving space. The promotion of building energy-saving is imperative.
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 resources and energy; it is beneficial to reduce the total social energy consumption, reduce pollutant emissions, and ensure that energy conservation Schedule tasks; help to promote the optimization and upgrading of the construction industry, cultivate strategic emerging industries such as energy saving and environmental protection, new energy; help to improve the comfort and health of buildings, and improve people's production and living conditions. All levels and departments should regard the implementation of green building 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 push the urban and rural construction onto a green, circular, and low-carbon scientific development track. To promote comprehensive, coordinated and sustainable economic and social development.
2 Design basis
GB-T 15587-2008 "Guidelines for Energy Management of Industrial Enterprises"
"Guidelines for Evaluating the Reasonable Electricity Use Technology of Enterprises" GB
"General Rules for the Preparation of Enterprise Energy-Saving Plans"
"Enterprise Energy Auditing Technology General Rules-GB"
GBT23331-2009 "Energy Management System Requirements"
GB-50052-2009 "Code for Design of Power Supply and Distribution System"
DL / T 645-1997 Multi-function Energy Meter Communication Protocol
DL / T 645-2007 Multifunctional Energy Meter Communication Protocol
CJ / T 188-2004 Technical Conditions for Data Transmission of Household Meters
GB / T 19582-2008 Modbus protocol based industrial automation network specification
3 Project Overview
Yixian CDC Business Complex is located south of Beitan Road and east of Qingdao Road. The building floor is a garage on the ground floor and 17 floors above the ground. The construction area is 26340㎡, the underground construction area is 10179㎡, the total construction area is 36519㎡, and the building height is 72.30m. The second floor of the comprehensive building is the experience center and comprehensive office area, the third floor is the conference reception area, the fourth to sixteenth floors are offices, and the seventeenth floor is the CDC laboratory.
The Acrel DTSD1352 energy meter in the distribution box of this project is connected to the Acrel-5000 energy consumption monitoring system to monitor the energy consumption situation, keep abreast of energy consumption situation, and improve energy saving awareness.
4 System architecture
Acrel Acrel-5000 building energy analysis management system uses workstation mainframe, communication equipment, measurement and control unit as basic tools, and provides a basic platform for real-time data collection, switch status monitoring, and remote management and control of large public buildings. Detection and control equipment constitutes an arbitrarily complex monitoring system. The system mainly uses a layered distributed computer network structure, as shown in the system structure diagram: the energy management system station control management layer and network communication layer of the Shexian Disease Control Center Business Comprehensive Building Project. A total of ARCSD DTSD1352 energy meters were on site.
System structure diagram
5 System software modules
Reflect the energy consumption of each category of buildings in the current year and the comprehensive energy consumption converted into standard coal, and calculate the energy consumption per unit area;
The main measurement through the meter is the energy consumption, and the daily energy consumption curve of the energy is displayed below the interface; click the upper area of each classification energy consumption to jump to the main energy consumption analysis interface of that classification;
Buildings can be switched through drop-down boxes, and building pictures can be replaced according to project requirements;
Reflect the energy consumption and comparison of the energy consumption (such as electricity) of the same day and yesterday, the same month and the same month, the current year and the same period of the previous year, the percentage increase and the value added;
Reflect the energy consumption trend of a certain category in the past 48 hours, 31 days, 12 months, and 3 years;
Energy pie chart for the current month reflecting a certain item of energy consumption;
A year-on-year analysis chart reflecting the energy consumption of a category for each month of the year;
It can flexibly select branch roads, and count the daily, monthly, weekly, quarterly, and annual energy use of branch roads within a certain period of time;
Pivot tables are powerful, users can perform a variety of data statistics, and sort the data in combination;
Statistics can be displayed through various charts such as histograms, dot-line charts, stacked charts, and pie charts;
Statistics can be exported to Excel;
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
Statistics can be exported to Excel;
Statistics on the monthly energy consumption of each branch road in the current year and the same period last year;
Query the meter readings at any two times of each branch and calculate the difference;
Time accuracy to minutes;
You can query the energy consumption parameters (such as voltage, current, power, power factor, etc.) of any branch for a certain period of time. The specific queryable parameters are related to the installed instruments and system configuration.
The data is displayed in the form of a chart or table, and the chart can be zoomed in, zoomed out and moved by mouse operation; the data can be sorted (maximum value, minimum value);
Data can be exported to Excel;
Configure the basic information of the building in accordance with the relevant technical specifications, such as: building functions, building area, air-conditioning area, building address, etc., where the building area and other information will be analyzed by energy consumption per unit area;
Configure basic information such as the type, model, and manufacturer of the meter used in the project, and add the monitoring parameter information that the meter can provide. The configuration here affects energy consumption statistics, energy consumption statistics by period, and parameter query functions;
Configure all measuring instruments used in the project, and save the address, transformation ratio, corresponding collector, code, name of the monitoring circuit and other information of the measuring instrument;
The information such as the meter, proportion, and calculation method involved in configuring the energy consumption statistics of each item can be flexibly configured according to the project situation. The configuration information here will affect the functions in the energy consumption analysis modules of each category. ;
Configure the energy consumption metering, calculation method, proportion and department energy consumption plan for each department. After completing this configuration, the department energy analysis function module will be enabled;
Configure the meter, calculation method, and proportion corresponding to an energy-consuming area in the building. After completing this configuration, the regional energy analysis function module will be enabled.
According to the energy consumption operation effect analysis of the business comprehensive building of Shexian Disease Control Center, a typical energy consumption analysis model was established and unified analysis was performed.
Establish a measurement system for building energy consumption, identify the energy consumption of the building, and find out the shady energy consumption. The energy-saving transformation is more targeted. At the same time, the results of energy-saving transformation are consolidated through management measures such as metering charges and performance assessment.
Select energy efficient equipment.
No matter how good the energy-saving equipment, you can't control waste or exert energy-saving effects. By adding automated energy-saving equipment, formulating equipment operation strategies, reducing human intervention, and centralized control, energy-saving equipment is achieving energy savings.
The same-chain analysis data provided by the energy consumption monitoring system is used to quantify the results of energy-saving transformation and show the energy-saving effect.
The total area of large public buildings is less than 4% of the total area of urban buildings, but the total energy consumption accounts for 22% of the total urban power consumption in the country. ~ 20 times. Public buildings are major energy-saving households and energy-saving focal points. Doing a good job in energy-saving work in the business building of Yixian CDC is of great significance for promoting and driving energy-saving work and achieving energy-saving and emission-reduction goals.
Technical requirements of the Ministry of Housing and Urban-Rural Development  No. 114