Selection and Cost Control of Core HVAC Equipment
The selection of HVAC system equipment directly determines approximately 35%-40% of the total MEP investment. Chiller selection should comprehensively consider cooling capacity, energy efficiency ratio, refrigerant type, compressor type, and brand tier. Cooling capacity should be based on hourly load calculations to avoid oversizing. For every 0.1 increase in COP, equipment price rises by approximately 3%-5%, but 10-year operating electricity costs are saved by approximately 8%-12%. Boiler capacity should be configured at 1.1 times the maximum winter heating load. For every 1 degree reduction in cooling tower approach, investment increases by 10%-15%, but chiller COP can improve by approximately 2%-3%.
Electrical System Equipment Selection and Cost Optimization
Electrical system cost accounts for approximately 25%-30% of total MEP investment. Transformer capacity should be configured at 1.2-1.3 times the hotel's total electrical load, with a five-star hotel unit area power index of 80-120VA/m2. SCB13-grade dry-type transformers reduce no-load losses by approximately 15% compared with SCB10. For distribution cabinets, A-grade brands such as ABB and Schneider are recommended for core circuits, while B-grade brands such as Chint can be used for auxiliary circuits, with a price difference of approximately 30%-50%. Diesel generator set capacity is typically 800-1500kW.
Water Supply, Drainage and Fire Protection Equipment Selection
Water supply, drainage and fire protection systems account for approximately 24%-26% of total MEP cost. Domestic water supply pump sets should be configured at 1.3 times the maximum daily water consumption hourly variation coefficient, with a five-star hotel water quota of approximately 400-600L/room-day. For water pumps, a hybrid configuration is recommended: imported brands (Grundfos, Wilo) for main units and domestic brands (Nanfang Pump) for standby units. Fire pumps must have CCCF certification, with brands selected from well-known domestic certified brands such as Kaiquan and Liancheng. Hot water boiler capacity should be calculated based on peak hot water load.
Intelligent System Equipment Configuration Optimization
Intelligent system cost accounts for approximately 7%-10% of total MEP investment. BAS control points are typically 1500-3000 points, with each point costing approximately 300-600 yuan. Open BACnet protocol is recommended to ensure interoperability. Smart lighting KNX/DALI protocol costs approximately 800-1500 yuan per circuit. Guest room RCU system costs approximately 3000-5000 yuan per room. Cost optimization strategies: adopt open standardized protocols to reduce integration costs, reasonably select brands, and reasonably determine control points to avoid over-configuration.