Comprehensive energy management, energy-saving tra

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Public building energy integrated management energy-saving transformation technology and application scheme

1 introduction

global warming has caused changes in the ecological environment. While pursuing sustainable management, enterprises should be duty bound to undertake the "energy conservation and emission reduction" society and take care of our earth! Acre undertakes the corporate mission of environmental protection, energy conservation and love for the earth. It has a strong technical team in the fields of power energy, video digital wall and industrial automation to provide customized overall solutions for China's energy conservation and emission reduction needs

2 analysis of building energy consumption

the comprehensive energy analysis of buildings found that air conditioning accounted for about 45%, lighting accounted for about 29%, escalators accounted for about 10%, and other power equipment accounted for about 16%. It can be seen that the power consumption of air conditioning, lighting and escalators is the main energy consumption

energy saving is estimated as follows:

1) refrigerators and heat pumps: it is estimated that the average energy saving will be 10% after the implementation of energy saving

2) circulating water pump: it is expected to save about 30% of energy on average after the implementation of energy conservation

3) AHU, Fau, SFU: it is estimated that the average energy saving will be about 35% after the implementation of energy saving

4) lighting energy saving system: the energy saving after transformation is estimated to reach 12%

5) escalator system: the energy saving after transformation is estimated to reach 30%

3 system scheme design

for the measures of building energy conservation, the building energy consumption analysis and management system of ankerui company is adopted. The scope of the project includes the integration of lighting energy-saving system, water pump energy-saving system, AHU energy-saving system, SF energy-saving system, central air-conditioning host system, power demand system and other systems, Through the unified monitoring platform and reliable energy management system, realize the comprehensive management of energy; Through the analysis and sharing of various data, strengthen the supervision of electrical equipment and electricity, realize the scientific measurement of electricity, guide the effective implementation of various energy-saving work, and finally realize the maximization of energy-saving benefits

3.1 system composition

energy consumption analysis and management system refers to a general designation of hardware systems and software systems that realize the monitoring and dynamic analysis of energy consumption in key buildings by installing classified and itemized energy consumption measurement devices in national office buildings and large public buildings, and collecting energy consumption data in time by means of remote transmission. Among them, classified energy consumption refers to the energy consumption data collected and sorted out according to the main types of energy consumed by state office buildings and large public buildings, such as electricity, gas, water, etc. Itemized energy consumption refers to the energy consumption data collected and sorted out according to the main uses of various types of energy. For example, the itemized energy consumption of electricity should include: lighting socket electricity, air conditioning electricity, power electricity, special electricity

3.2 data transmission technology

the energy consumption data collected by the automatic metering device of the building energy consumption monitoring system is automatically and real-time uploaded to the data center through RS485 interface and TCP/IP communication protocol, so as to ensure that the data is effectively managed and supported by efficient inquiry services. At the same time, certain coding rules are adopted for data transmission to realize the consistency of data organization, storage and exchange

3.3 data center

the data center is the database, which receives and stores the energy consumption data of the monitoring buildings in its management area, and processes, analyzes, displays and publishes it. The data center can set the time interval of data update, access historical data, alarm, print reports, draw real-time and historical curves and charts, and reserve corresponding expansion functions

3.4 system structure

acrel-5000 building energy consumption analysis and management system takes computer, communication equipment and measurement and control unit as basic tools, and adopts one or more combination of field bus, optical fiber ring or wireless communication based on the actual situation of the site, providing a basic platform for real-time data acquisition and remote management and control of large public buildings, It can form any complex monitoring system with detection equipment. Open, networked, unitized and configurable, it adopts the object-oriented hierarchical, hierarchical and distributed intelligent integrated structure. Establish the following hierarchical structure:

3.5 system function

"a strange smell permeates the air" the energy consumption data collection methods of Acrel-5000 building energy consumption analysis and management system include manual collection methods and automatic collection methods. The data collected by manual collection includes the data collection indicators of the basic situation of the building and other energy consumption data that cannot be collected automatically, such as the energy consumption of coal, liquefied petroleum, artificial gas and so on. The data collected by automatic collection method includes building sub item energy consumption data and classified energy consumption data, which are collected in real time by automatic metering device and transmitted to the data center in real time by automatic transmission method

3.6 information management of large public buildings or buildings

the system provides a standard manual information entry interface, which can sort out and enter the basic information of each monitored building, and supports the function of manually entering historical energy consumption data

The establishment of the database of the

acre-5000 building energy consumption analysis and management system is also completely based on Document No. 114. According to the use functions and energy consumption characteristics of buildings, the state organ office buildings and large-scale public buildings are divided into the following eight categories:

1, office buildings 2, shopping malls

3, guest houses and restaurants 4, cultural and educational buildings

5, medical and health buildings 6, sports buildings

7, comprehensive buildings 8 Other buildings

3.6.1 real time monitoring of energy consumption data

the system collection station regularly collects the instrument parameters of each monitoring point and uploads them to the local building energy consumption analysis and management system database. Users can query the energy consumption monitoring situation in real time locally

3.6.2 building classification energy consumption analysis

the system classifies and analyzes building energy consumption while completing data processing and uploading. This part of the function conforms to the definition of document 114, that is, building energy consumption is classified into the following six categories:

1, power consumption

2, water consumption

3, gas consumption (Natural Gas or gas)

4, heat consumption of central heating

5, cooling consumption of central cooling

6 Other energy applications (such as centralized hot water supply, which is divided into digital display hydraulic universal testing machine, coal, oil, renewable energy, etc.)

3.6.3 energy consumption analysis of electric quantity sub item

power consumption of lighting sockets: power consumption for lighting, sockets and other indoor equipment in the main functional areas of the building. It mainly includes power for lighting and sockets, corridor and emergency lighting, and outdoor landscape lighting

power consumption of air conditioning: mainly including power consumption of cold and hot stations and power consumption of air conditioning terminals

power consumption: mainly including elevator electricity, water pump electricity and ventilator electricity

special electricity: mainly including information center, laundry, kitchen, restaurant, swimming pool, gym or other special electricity

the total energy consumption of buildings is the sum of standard coal converted by the energy consumption of each classification of buildings (except water consumption)

total electricity consumption = ∑ direct measurement value of the total meter of each transformer

classified energy consumption = ∑ direct measurement value of each classified energy consumption meter

itemized electricity consumption = ∑ direct measurement value of each itemized electricity consumption meter

electricity consumption per unit building area = total electricity consumption/total building area

electricity consumption per unit air conditioning area = total electricity consumption/total air conditioning area

3.6.4 the same as Month on month analysis

statistics the hourly, daily and annual consumption of energy consumption in buildings or areas, which are displayed in different ways such as curves and histograms, and support report output

3.6.5 auxiliary diagnosis of building energy conservation

the system can extract the energy consumption data for the same and ring comparative analysis, establish the benchmark value for the maximum cycle times of the tested spring, judge the energy consumption level of each monitoring point, put forward a complete diagnosis process for the improvement of energy consumption, and give the energy consumption analysis report

3.7 intelligent power monitoring instruments should be used for power metering of large public buildings

power meters should be used as internal management meters for power metering of large public buildings, rather than toll meters. The main characteristics of the two are summarized as follows (see Table 1)

the power supply department generally implements the charging system of one meter per household for users, that is, the charging meters are installed uniformly by the power supply department. Therefore, in addition to the measuring instrument license issued by the Technical Supervision Bureau, the toll meter can only be installed and used with the permission of the local provincial and municipal power departments. In the power management of large public buildings, the power supply department will generally install toll meters at the main incoming line

on the basis of users' installation of toll meters, power meters are installed for internal energy management considering the needs of internal energy measurement and energy conservation management. Therefore, users can choose to purchase at their own discretion, but they should pay attention to whether the manufacturer has the measurement license of power meters (electric energy part). The power meter can complete the collection of sub item electric energy data of each circuit, each floor or each functional area, and complete the sub item measurement of electric energy of large public buildings through the background electric energy management system

4 application case

a library in Pudong, Shanghai is a large public building with high energy consumption, with a total construction area of 60885 square meters. The energy consumed is mainly electricity and water, as well as a small amount of gas and diesel. The diesel generator is used as an emergency power supply. The energy consumption monitoring system of the project adopts a three-layer network structure. Each floor classifies and itemizes the electricity consumption. Measuring instruments are installed on each floor and the main water supply pipeline, gas and diesel pipelines to realize the real-time collection and monitoring of energy consumption. All intelligent measuring instruments are grouped through Fieldbus to realize centralized monitoring and management of the energy consumption of each circuit on site in the monitoring room

in this project, Yanxiang industrial computer is used as the monitoring host, with LCD, printer and other equipment. When the power supply problem occurs in the whole system, Santak UPS can ensure the normal operation of station control management equipment within a certain period of time. The data acquisition terminal adopts intelligent measuring instruments with high reliability and field bus connection. For the library power supply and distribution system, ACR series multi-function power meters are installed in low-voltage incoming circuits and important circuits, and ADL series guide rail watt hour meters are installed in ordinary feeder circuits and lighting distribution boxes

acr series multi-functional power instruments have comprehensive three-phase AC power measurement, complex rate power metering, four quadrant power metering, 2-31 harmonic analysis, power quality analysis, remote signal input, remote control output and network communication functions. They are mainly used for comprehensive monitoring and control of power supply quality and power management, and are widely used in low-voltage contact cabinet, outlet cabinet, power cabinet and other occasions. In addition to collecting basic electric energy parameters, ADL series guide rail mounted electric energy meters also have the advantages of small size and convenient installation. The structural size of adl100 single-phase electric energy meter is 4 modulus, which is installed in the lighting distribution box together with the miniature circuit breaker, as shown in Figure 2. Adl300 three-phase electric energy meter is 7 modulus structure, which is mainly used in the power cabinet. The installation method is shown in Figure 3, which greatly facilitates the automatic management of power consumption

Figure 2 example of adl100 application and installation Figure 3 adl300 is applied in the power cabinet

the energy consumption monitoring system completes the data collection of each power circuit, water supply, gas and diesel pipeline through the transmission channel provided by the field equipment and communication system. After analysis and processing, the information is provided to the attendant for reference in various forms such as statements and graphics, so that the attendant can easily grasp the operation and energy consumption of the system, and find out Correct the phenomenon of energy waste, so as to carry out energy conservation management. When necessary, it can also provide fast remote control means to complete the change of equipment operation status and

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