**1. Introduction**
With the rapid development of society and the continuous growth of energy consumption, the demand for energy has become a major challenge. Particularly in the building sector, energy usage has surged, making it the third-largest consumer of energy after industry and transportation. If this trend continues, it will eventually strain China’s energy supply and security. Therefore, reducing energy consumption in buildings is an urgent issue that requires immediate attention.
Among building energy consumption, large public buildings play a significant role. Although their total energy use is lower than that of residential buildings, their energy consumption per unit area is much higher. This makes them a key target for energy-saving efforts. Implementing an energy monitoring system for large public buildings enables better understanding of energy use patterns, supports the formulation of effective energy-saving policies, and promotes sustainable development. As urbanization and economic growth continue in China, the energy demand from buildings is expected to grow even faster. Without proper measures, this could lead to serious energy shortages. Hence, energy conservation in buildings is not just important—it is essential.
**2. Design Basis**
The project follows several national and international standards to ensure the reliability and efficiency of the energy monitoring system. These include:
- ISO/IEC 11801: International Integrated Cabling Standard
- GB/T 50198: Technical Specifications for Monitoring System Engineering
- GB 50052-2009: Design Specification for Power Supply and Distribution Systems
- GB 50054-2011: Low Voltage Distribution Design Code
- GB/T 50063-2008: Design Specifications for Electrical Measuring Instruments
- IEC 61587: Electronic Equipment Mechanical Structure Series
- DL/T 448-2000: Technical Management Regulations for Electric Energy Metering Devices
- DL/T 698.1–2009, DL/T 698.2–2010, DL/T 698.31–2010, DL/T 698.35–2010, DL/T 698.41–2010, and DL/T 698.42–2010: Communication protocols and technical specifications for energy information collection systems.
**3. Project Overview**
Located in Yinchuan City, Ningxia Province, the Yinchuan Jianfa Da Yuecheng Hyatt Hotel is strategically situated in the Jinfeng business district. The hotel is part of a complex with two city buses running on the first floor, providing direct access to the train station and other administrative areas. Its convenient location also places it within walking distance of the Yinchuan CBD Business Center.
This project focuses on monitoring water, cold, and hot meters in the hotel. By collecting, analyzing, and processing data from these instruments, the system helps improve energy efficiency, support better energy management, and contribute to overall energy conservation efforts.
**4. System Architecture**
The Acrel-Acener-5000 Energy Analysis Management System is designed to meet the specific needs of the hotel. It uses shielded twisted pair cables to connect to intelligent gateways, which then upload data via a TCP/IP network to the monitoring host.
The system employs a hierarchical distributed structure, consisting of three layers: the station control management layer, the network communication layer, and the field device layer. All instruments are connected through 485 shielded twisted pair cabling to the fire control room, where the intelligent gateway collects and manages the data.
**6. System Software Modules**
- **Comprehensive Energy Consumption Main Interface**: Displays the building's layout, basic information, monthly electricity consumption pie charts, and energy source consumption. Users can select buildings or time periods to view energy usage, with automatic updates.
- **Branch Energy**: Allows users to track daily, weekly, monthly, quarterly, and yearly energy consumption for each branch, visualize trends, and export data.
- **Energy Consumption Statistics**: Provides detailed analysis of sub-item energy use, including year-on-year comparisons, pie charts, and stacked graphs.
- **Energy Usage Reports**: Enables users to generate reports based on selected time frames and export data to Excel.
- **Year-on-Year Ratio Analysis**: Compares current energy consumption with previous years and months, helping assess energy-saving performance.
- **Configuration Options**: Includes setting up building details, instrument configurations, metering parameters, and energy plans for departments and regions.
**7. Outlook**
The system will store collected data and present it visually through charts, enhancing user experience. It will help identify high-energy consumption points by analyzing loop ratios and proportions. Through energy consumption analysis, the hotel can implement energy-saving improvements, reduce operating costs, and increase profitability.
**8. Conclusion**
The building energy consumption system is crucial in addressing rising energy prices and shortages. After implementation, it reduces staff workload, improves work efficiency, and provides clear statistical insights that aid managers in making informed decisions. This system plays a vital role in promoting energy conservation and achieving emission reduction goals.
**About the Author**
He Meifang is a researcher at Ankerui Electric Co., Ltd., focusing on smart grid power distribution. She can be contacted at 021-69156950 or via QQ.
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