Ankerui Zhang Tiantian.
Summary:According to the project, relying on the basic platform of the electric energy metering management system, water metering supervision system and heat metering management system of a college, the overall framework and scheme of the application of the integrated management system platform for building energy consumption in colleges and universities have been formulated, which can monitor the various energy consumption of campus buildings in real time, count energy consumption, conduct energy efficiency analysis, and can evaluate and diagnose the system and other application research, so as to achieve data visualization, analysis and charting, energy consumption indexing, management digitalization, Consumption rationalization provides reliable data support for the realization of long-term and orderly campus energy-saving management and the construction of energy-saving campuses.
Keywords:Building Energy Management;Energy metering;Feed water metering;Heat metering;Economical campus.
0 Introduction. China attaches great importance to energy conservation and emission reduction, and at the Fifth Plenary Session of the 16th Central Committee, it was determined to accelerate the major decision to accelerate the construction of a resource-saving and environment-friendly society, marking the comprehensive implementation of energy conservation and emission reduction in China. In the context of creating a conservation-oriented society, in order to promote the work of campus energy conservation and emission reduction in an orderly and comprehensive manner, the Ministry of Education issued the "Notice of the Ministry of Education on Carrying out Energy Conservation and Emission Reduction School Actions" in 2007, marking the full implementation of energy conservation and emission reduction in college campus buildings. In recent years, energy conservation and emission reduction have become a major theme of campus construction across the country. The research on energy consumption measurement and management in colleges and universities is the key foundation for reducing energy consumption in colleges and universities and building energy-saving campuses. The buildings of colleges and universities are large-scale and densely populated, and they are large-scale public buildings, with large energy consumption, and the construction of energy-saving campuses is of great significance. The construction of energy-saving campus building energy-saving supervision system can implement dynamic monitoring, energy consumption statistics, energy audit, energy efficiency publicity, energy consumption settlement, strengthen energy management, implement energy-saving transformation, implement energy-saving planning and construction of new buildings, and promote the construction of energy-saving campuses in universities, so as to comprehensively promote the construction of energy-saving campuses in China's colleges and universities, and provide strong support for promoting building energy conservation, creating a conservation-oriented harmonious society, and implementing the scientific concept of development. According to the relevant standards and guidelines, the completed school building energy conservation supervision system is based on the comprehensive energy consumption (water, electricity, heat, etc.) remote monitoring platform, which realizes the monitoring, analysis and statistics of the energy consumption data of the whole school, and provides data support for the classification of energy consumption in colleges and universities and the formulation of hierarchical energy consumption quotas according to the characteristics of campus building energy consumptionSummarize the general energy consumption law of colleges and universities, and provide management experience for the construction, management and transformation of colleges and universitiesThrough data collation and analysis, it provides data for the country to carry out building energy conservation research, planning and design in the new era.
1. Building energy consumption management system platform architecture and application framework.
A college is a full-time undergraduate college in a city, covering an area of 649 10m, construction area 447x10m, with teaching buildings, office buildings, gymnasiums, sports fields, libraries, teaching experiments advanced data sensing and acquisition equipment, network data transmission, database technology, the development of a comprehensive platform for building energy consumption supervision, university building energy management system platform architecture as shown in Figure 1, the system includes equipment layer, data acquisition layer, data layer, basic platform layer, open interface layer, application system layer and interaction layer. This energy consumption management system can be used to remotely and real-time monitor and collect energy consumption data of dozens of campus buildings of a college, so as to carry out energy consumption monitoring, statistics, analysis and diagnosis, and provide a strong support platform for the full implementation of visual monitoring, digital management, quota management and quantitative evaluation of campus energy consumption management. The building energy consumption management system platform has been under construction since 2014, and the initial projects such as water, electricity and heating have been completed and officially put into operation, with good operation results.
2. The overall framework and implementation function of the application of the building energy management system platform in colleges and universities.
The short-term and long-term planning of the building energy supervision comprehensive service platform of a college mainly includes the following subsystems, and the overall framework and implementation functions of the flat application are shown in Figure 2.
Building energy metering and management system.
The building power monitoring and management system realizes many functions such as electricity management, cost settlement, data statistical analysis, and index execution supervision. It is mainly used for real-time monitoring of power data and analysis and comparison of historical data for various buildings and power consumption departments, which provides basic conditions for the quantitative management of electricity consumption of various departments.
Building water metering supervision system.
The water supply metering monitoring and management system can monitor and collect the accumulated water volume of each part of the water pipe network in real time, which can be used by the control center and relevant departments to analyze and formulate index decisions, and can also find water leakage points in time, gain time for troubleshooting, and minimize waste, improve the efficiency of water resources use and water management, so as to realize the informatization and modernization of water supply management.
Building heat metering management system.
The heat metering management system based on the temperature area method has two major functions of metering and system management, and the system is composed of a metering system and a remote terminal management system, which can realize the real-time data of remote monitoring of the heating supply of each building, such as the temperature of the heating room, water supply, return water temperature and other data, and summarize and statistically analyze the data, so as to provide a basis for the scientific heating management of the heating management department.
Network prepaid management system.
The network prepaid management system adopts real-time communication and data acquisition technology based on the campus network, combined with the intelligent prepaid water and electricity meter embedded with encrypted communication protocol, the system can realize networked real-time operation and real-time metering and monitoring, real-time sales and return, real-time on-off and off, effectively solve the problem of difficult charging, and promote users to save water and electricity.
Comprehensive analysis system for energy efficiency.
After the accumulation of a large number of basic energy consumption data, the comprehensive data extraction and modeling processing of the energy efficiency comprehensive analysis system can further combine climate change and other factors to realize the rational evaluation of energy indicators and the scientific development of energy consumption trends. The application of the system will provide expert decision-making support for the medium and long-term deployment of energy-saving management, and provide comprehensive information support for reducing carbon emissions and achieving low-carbon economy and sustainable development.
Energy meter management system.
It is mainly used to allocate monthly, quarterly, and annual energy consumption plan indicators for various buildings and energy-using departments in the school, and use the allocated indicators as the basis for early warning, energy assessment, and rewards and punishments for energy consumption use exceeding the standard.
Energy consumption public system.
The energy consumption publicity is divided into two parts: social publicity and internal campus publicity. Provide diagnostic information on the energy consumption of the unit;Assessment of energy consumption for buildings, equipment, departments, etc. Supervise the energy consumption per unit area, classified energy consumption, per capita energy consumption and other indicators of a single building, and dynamically display the energy consumption ranking and energy consumption cost rankingProvide reports on energy consumption costs, annual energy saving rates, etc., publicize the internal energy consumption and ranking of the unit, as well as the comparison information of energy consumption between the current year and the previous year.
3. Monitoring and analysis of water and electricity consumption.
3.1. Water and electricity monitoring.
According to the actual situation of the building of a college, the water and electricity energy consumption of 17 buildings with equipment installation conditions were monitored, and the total metering of water consumption and electricity consumption of each building was completed, and the buildings with classification and sub-item conditions were sub-metered. The building types for water and electricity energy consumption monitoring include: teaching buildings, canteens, student apartments, administrative buildings, libraries, logistics buildings, boiler rooms, substations, etc. The system began trial operation in December 2014.
Figure 3 (a) and (b) are the hourly electricity consumption and hourly water consumption changes of lighting sockets in a student apartment on June 25, 2015 and June 27, 2015 3 (Thursday, Friday, and Saturday, respectively). There was little difference in daily electricity consumption* and daily water consumption on weekdays on June 25 and 26 June and Saturday 27, with an average daily electricity consumption of 77 for lighting outlets in 3D0kw·h;The average daily water consumption in 3D is 344m。
Figure 4(a) and (b) are the 3d of August 6 and August 8, 2015 respectively (Thursday and week) for a student apartment.
5. Saturday) of the hourly electricity consumption and hourly water consumption of the lighting socket. These three days are during the summer vacation, and the average daily electricity consumption of 3D lighting sockets is 321kw·h;The average daily water consumption in 3D is 554m is 58 less than the 3d electricity and water consumption on June 25, 2015 and June 27, 2015 in Figure 33% and 834%。
3.2. Comparative analysis of water and electricity consumption.
The energy consumption management system can compare and analyze the energy consumption data of each building on a year-on-year and month-on-month basis [Figure 56 is a comparison chart of the monthly electricity consumption of the administrative building from December 2014 to April 2016, and the data in the chart can be found to be 39 years lower than that in March 2016 and March 2015, respectively3% and 19The energy saving rate in April was similar to that in March. After investigation, the power saving of the administrative building is mainly due to the use of new LED energy-saving lamps, and the school is replacing the lamps and lanterns in each building one after another. The school's logistics and maintenance department investigated some possible water leakage points monitored by the system, found and repaired some water leakage points, compared with previous years, the water consumption of the system in the same period has also decreasedFigure 56 In February 2015 and January 2016, the monthly electricity consumption and monthly water consumption were 0 because there was no management personnel on duty during the winter vacation, and the water and electricity energy consumption management system was closed, and this problem has been reported to the relevant staff, and it will be improved in the future.
4. Monitoring and analysis of heating energy consumption.
4.1. Composition and monitoring of heat metering management system.
Heat metering management system is applied in 17 faculty residences of a college, the total construction area of heat metering is 197241 system from mid-October 2015 debugging line heat metering management system platform can be real-time monitoring, the system can monitor and record the situation of each user and record data in real time in the entire monitoring system, the system administrator displays data through the computer interface, can intuitively observe the heat energy consumption of all users, payment information, The system will automatically provide warning information in the event of an abnormal situation such as indoor temperature and other relevant data in the operation of the system, so as to realize visual monitoring and management [8] The heat metering management system consists of two parts: temperature measurement, metering system and remote terminal management system. The composition and function of the temperature measurement and metering system are as follows:
1) Install a heat meter at the heat inlet of the high and low heating zones of each unit to measure the heating heat consumption of the area
2) Install a temperature sensor in the representative room of each household to measure the indoor temperature;
3) The temperature sensor sends the indoor temperature data to the wireless data receiver by wireless means, and the wireless data receiver is installed in the pipe well outside the door of the hot user
4) The wireless data receiver sends the temperature data to the data acquisition concentrator.
5) The data collection concentrator apportions the calorific value according to the temperature data, area data and the thermal energy data of the heating area heat meter of each user, and realizes the apportionment of the front desk
6) The data acquisition concentrator transmits the data to the remote terminal management system through GPRS.
The remote terminal management system receives the data sent by the data collection concentrator, and remotely monitors the real-time data of each building's heating supply, such as room temperature, water supply and return water temperature, and collects, analyzes and manages the data.
The heat metering management system can also monitor the real-time heating situation of each district and each household respectively, Figure 7 is a screenshot of the real-time data of heating monitoring in each district, and each column in Figure 7 represents the heat meter number, the communication status of the heat meter, the heating apportionment start time, the black meter, the apportionment of heat, the water supply temperature, the return water temperature, the data receiving time, etc.
4.2. Analysis of heating energy consumption.
This heating energy consumption management platform can realize the daily, monthly and annual heat supply statistics of all buildings, buildings, units, districts and households. Figure 8 shows the comparison of the daily heat supply of two units in the low area of a building. According to the basic data, it is possible to analyze the heating heat consumption index and other data. Because the heat metering management system is commissioned and operated at the beginning of the heating season in October 2015, the initial data of the system commissioning is unstable and fluctuates greatly.
5 Acrel-EIOT Energy IoT Cloud Platform.
1) Overview. ACREL-EIOT Energy IoT Open Platform is a set of platforms based on the IoT data platform, establishing a unified uplink and downlink data standard, and providing Internet users with energy IoT data services. Users only need to purchase Accuray IoT sensors, select gateways, and scan the code to get the required industry data services using mobile phones and computers after self-installation.
The platform provides functions such as data cockpit, electrical safety monitoring, power quality analysis, power management, prepaid management, charging pile management, intelligent lighting management, abnormal event alarm and recording, operation and maintenance management, and supports multi-platform, multi-language, and multi-terminal data access.
2) Application site.
This platform is suitable for apartment tenants, chain small supermarkets, small factories, building management system integrators, small properties, smart cities, substations, buildings, communication base stations, industrial energy consumption, smart light towers, power operation and maintenance and other fields.
3) Platform structure.
4) Platform features.
Electricity collection. The power centralized reading module can realize the query, analysis, early warning and comprehensive display of various monitoring data to ensure the environmental friendliness of the distribution room. In terms of intelligence, the telemetry of the power supply and distribution monitoring system is realized', remote signaling, remote control, comprehensive detection and unified management of the system;In terms of data resource management, it can display or query the operation of each equipment in the power supply and distribution room (including historical and real-time parameters, and according to the actual situation, monthly and annual reports can be queried or printed, so as to improve work efficiency and save human resources.