1. Energy-Saving Optimization Practices for Building Automation Systems
BAS energy saving is the core means by which ELV intelligent systems improve building energy efficiency. Main energy-saving optimization strategies: cold source system optimization—condenser water temperature reset, chilled water temperature reset, variable flow control, cooling tower fan VFD control; AHU terminal optimization—demand-controlled ventilation (DCV), supply air temperature reset, night purge mode, precooling/preheating optimization; lighting system optimization—daylight harvesting (DLL), occupancy sensing control, time scheduling, zone dimming; equipment operation optimization—equipment start/stop optimization, runtime balancing, equipment efficiency monitoring.
2. Equipment Energy Efficiency Improvement and Green Selection
Key focus areas for ELV equipment energy efficiency improvement: network equipment—switches and routers should support the EEE (Energy Efficient Ethernet, 802.3az) standard, reducing power consumption by approximately 70% when idle; servers—virtualization technology (VMware/Hyper-V) reduces the number of physical servers by 60%–80% and data center energy consumption by 40%–50%; storage devices—SSD replacement of HDD reduces power consumption by approximately 80%; video surveillance—H.265+/SVAC encoding technology saves 50% of storage space and transmission bandwidth.
3. Energy Management Systems and Data-Driven Optimization
The Energy Management System (EMS) is a key tool for achieving continuous energy savings. System architecture: acquisition layer—smart electricity meters, water meters, gas meters, heat meters using Modbus/M-Bus protocols; transmission layer—edge computing gateways with data collection frequency of 1–15 minutes; platform layer—energy management software for data storage, analysis and display; application layer—energy-saving diagnostics, anomaly alerts, energy efficiency benchmarking, automated reports. EMS core functions: itemized energy metering—lighting, HVAC, power, special electricity, with itemized proportions; zone-based energy statistics—guest room areas, public areas, back-of-house areas, F&B areas.
4. Renewable Energy and Carbon Neutrality Practices
Renewable energy integration and carbon neutrality practices in hotel ELV systems: photovoltaic power generation—BIPV (building-integrated photovoltaics), distributed PV with installed capacity of 50–500 kWp, self-consumption with surplus fed to the grid; solar hot water systems—evacuated tube collectors or flat plate collectors providing guest room hot water preheating; ground-source/water-source heat pump systems—utilizing the underground constant-temperature layer to improve heating/cooling source efficiency, with COP up to 4.0–6.0; energy storage systems—lithium battery storage combined with PV for peak shaving and valley filling.