An Kerui Qiu Hong

Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405

Abstract: The total area of ​​large-scale public buildings is less than 4% of the total area of ​​urban buildings, but the total energy consumption accounts for 22% of the total electricity consumption in cities and towns in China. The annual consumption of large-scale public buildings per unit area reaches 70 to 300KWh, which is an average residential building. 10 to 20 times. Public buildings are important for energy conservation and energy conservation. To do a good job in energy conservation in public buildings is of great significance in promoting and stimulating energy conservation in the entire society, realizing energy conservation and emission reduction targets, and implementing the major strategy of “turning modes and adjusting structures”. This article describes the Rushan Civic Center complex and uses smart power meters to collect various electrical parameters and switch signals at the distribution site. The system adopts on-site local networking method. After networking, it communicates via the field bus and transmits it to the background. Through the Acrel-5000 building energy consumption monitoring system, power distribution circuit and on-site gas meters, flow meters, etc. are realized in real time. monitor.

Keywords: large-scale public buildings; energy consumption monitoring system; ACREL-5000;

1 Introduction

At present, China is already the world’s second largest energy producer and consumer. According to statistics, China’s building energy consumption accounts for about 28% of the country’s total energy consumption. In China’s newly built 2 billion square meters of buildings, 99% of which are It is a high-energy-consuming building; only 4% of the existing buildings have adopted energy-saving measures. Large-scale public buildings not only have high energy density, but also have very serious energy waste. They have huge space for energy conservation. The promotion of building energy-saving has become imperative, and energy conservation and consumption reduction are the priorities.

Since the "Eleventh Five-Year Plan" period, Shandong Province has achieved remarkable results in building energy efficiency and green building work. It has built 360,000 square meters of energy-efficient buildings, won 6 million square meters of green building projects, and implemented 78 million square meters of energy-saving renovation of existing buildings. The energy-saving supervision system for office buildings and large-scale public buildings was basically established. However, it also faces some outstanding problems. The main problems are: the mode of urban and rural construction is relatively extensive, the energy consumption of the building construction and use process is high, the utilization efficiency is low, the construction life cycle supervision mechanism is not perfect, and the level of green building development needs to be improved.

Vigorously carry out green building actions, and guide urban and rural development with green, recycling, and low-carbon concepts, which will help increase the efficiency of resource and energy use, ease the tension between supply and demand of resources and energy, help reduce total social energy consumption, reduce pollutant emissions, and ensure energy savings are completed. Row tasks; help to promote the optimization and upgrading of the construction industry, foster strategic emerging industries such as energy-saving and environmental protection and new energy; help improve the comfort and health of buildings and improve the production and living conditions of the people. All levels and departments must take green building action as an important part of vigorously promoting the construction of ecological civilization, further enhance their sense of responsibility and urgency, make overall plans, and pay close attention to implementation, and promote urban and rural construction to embark on a green, circular, low-carbon scientific development track. To promote comprehensive, coordinated and sustainable economic and social development.

2 Design basis

GB-T 15587-2008 "Energy Management Guidelines for Industrial Enterprises"

"Evaluating the rational use of electricity technology guidelines GB"

"General Rules for the Preparation of Energy-saving Planning for Enterprises"

"General Principles of Energy Auditing for Enterprises - GB"

GBT23331-2009 Energy Management System Requirements

GB-50052-2009 "Power Supply and Distribution System Design Specifications"

â—† Energy consumption measurement device national and industry standards

DL/T 645-1997 Multifunctional Energy Meter Communication Protocol

DL/T 645-2007 multi-function energy meter communication protocol

CJ/T 188-2004 household meter data transmission technical conditions

GB/T 19582-2008 Industrial Automation Network Specification Based on Modbus Protocol

3 Project Overview

With a construction area of ​​36,000 square meters, the Rushan Citizens Service Center mainly integrates relevant functions and resources involving enterprises and citizen services, and creates four platforms, including “government services, corporate services, human and social services, and social management”. The comprehensive service-oriented organization allows the masses to “enter the house and do a hundred things”.

The on-site equipment in the project is located in the office building of Rushan Public Service Center. It is necessary to incorporate the meter into the monitoring scope, supervise the situation of electric energy consumption, grasp the energy consumption at any time, and raise awareness of energy conservation.

4 System Architecture

Acrel-5000 building energy consumption analysis management system is based on workstation host, communication equipment, and measurement and control unit. It provides a basic platform for real-time data acquisition, switch status monitoring and remote management and control of large-scale public buildings. It can The detection and control equipment constitutes an arbitrarily complex monitoring system. The system mainly uses a hierarchical distributed computer network structure, as shown in the system structure diagram: Rushan Civic Center project energy consumption system station management and network communication layer. A total of 56 rail-type energy meters are on site.

System structure

6 system software module

â—† Comprehensive energy consumption main interface

Reflect the energy consumption of each category in the year of the building and convert it into the equivalent energy consumption of standard coal, and calculate the energy consumption per unit area;

Metering is mainly based on electricity consumption. The energy consumption curve on the day of the day is displayed at the bottom of the interface. Clicking on the upper area of ​​each category's energy consumption can jump to the energy consumption analysis main interface of this classification.

The building can be switched through the drop-down box. The building picture can be replaced according to the project requirements;

â—† Classified energy consumption main interface

Reflect the energy consumption (for example, electricity) of a certain category and the same period of yesterday, the same period of previous month, the energy consumption and comparison of the same period of the previous month, the same period of the previous month, the current year and the same period of the previous year, the growth percentage and the added value;

Reflect energy consumption trends of the past 48 hours, the past 31 days, the past 12 months, and the past 3 years of a certain classification energy consumption;

The monthly energy pie chart reflecting the energy consumption of a certain item;

Reflecting the energy consumption of a certain category in the same year, the monthly energy use analysis graph;

â—† Classification energy consumption branch energy statistics report

It can flexibly select the branch road and count the daily, monthly, weekly, seasonal and annual energy use of the branch energy during a certain period of time;

Through the powerful function of the pivot table, the user can perform a variety of data statistics and sort the data in combination;

Statistical data can be displayed by various charts such as histograms, dotted charts, stacked charts, and pie charts;

Statistics can be exported to Excel;

â—† Classified energy consumption branch non-working daily energy

Statistics on working days and non-working days for each branch, and non-working days can be set flexibly through the system

Statistics can be exported to Excel;

â—† Category energy consumption branch year-on-year analysis

Statistics on the monthly energy use for each branch and the energy consumption for the same period last year;

â—† Classified energy consumption branch energy use

Query the meter readings for any two branches of each branch and calculate the difference;

Time accuracy to minutes;

â—† Trend analysis of energy consumption by time for classified energy consumption branches

The energy parameters (such as voltage, current, power, power factor, etc.) of any branch can be queried during a certain period of time. The specific queryable parameters are related to the installed instruments and system configurations.

The data is displayed in the form of a chart or a table. The chart can be zoomed in, zoomed out, or moved by mouse operation; the data can be sorted (maximum, minimum);

Data can be exported to Excel;

â—† Configuration Options

According to the relevant technical specifications, the basic information of the building is configured, such as: building function, building area, air-conditioning area, building address, etc., in which the building area and other information will be used to analyze energy consumption per unit area;

Configure the basic information such as the type, model, and manufacturer of the instrument used in the project, and add the monitoring parameter information that can be provided by this type of instrument. The configuration affects the energy consumption statistics, time-separated energy statistics, and parameter query functions.

All metering instruments used in the configuration project, save metering instrument address, transformation ratio, corresponding collector, code, monitoring circuit name and other information;

The information related to metering, proportioning, and calculation methods involved in configuring itemized energy consumption statistics can be flexibly configured according to the situation of the project. The configuration information here will affect the energy consumption analysis of each classification. ;

Configure the measuring instruments, computing methods, proportions, and department energy plans for each department's energy use. After completing this configuration, the department's energy consumption analysis module will be enabled.

Configure the meter, calculation method, and proportion of an energy use area in the building. After completing this configuration, the regional energy consumption analysis module will be enabled.

7 Outlook

According to the analysis of the effect of the energy consumption of the Rushan Civic Center, a typical energy analysis model was established and analyzed.

a. Establish a building energy consumption measurement system, focus on the building energy consumption, find the energy consumption shady, and make more energy-saving changes. At the same time, strengthen the energy-saving transformation results through management measures such as measurement fees and performance assessment.

b. Select energy-efficient equipment.

c. Even the best energy-saving equipment can't control waste and can't exert energy-saving effect. By increasing automation energy-saving equipment, formulating equipment operation strategies, reducing human intervention, and centralizing management and control, energy-saving equipment is achieving energy conservation.

d. Quantify the results of energy-saving transformation through the same-ring analysis data provided by the energy consumption monitoring system to maximize the energy-saving effect.

8 Conclusion

The total area of ​​large-scale public buildings is less than 4% of the total area of ​​urban buildings, but the total energy consumption accounts for 22% of the total electricity consumption in the country's cities and towns. The annual consumption of large-scale public buildings per unit area reaches 70 to 300KWh, which is 10 for ordinary residential buildings. ~ 20 times. Public buildings are important for energy conservation and energy conservation. It is important to do energy-saving work in the Rushan Civic Center to promote and promote energy conservation and achieve energy conservation and emission reduction targets.

references:

Ministry of Housing and Urban-Rural Development Technical Requirements [2008] No. 114

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