Procurement and Selection of HVAC Refrigeration Equipment
HVAC refrigeration equipment is the largest cost category in MEP procurement. Chiller selection should determine cooling capacity based on full-year dynamic load simulation. Energy efficiency indicators: COP not less than 6.3, IPLV not less than 10.5. Refrigerants: prioritize low-GWP environmentally friendly refrigerants (R513A GWP631 to replace R134a GWP1430). Compressor types: centrifugal for large capacity (above 800kW), screw for medium capacity (300-800kW), magnetic bearing for high part-load efficiency. Cooling tower selection: verify local wet-bulb temperature approach controlled at 4-5 degrees. Fan coil unit noise in guest room areas not to exceed 35dB(A).
Procurement and Selection of Electrical Equipment
Transformers: dry-type SCB13 or above energy efficiency grade recommended, no-load loss approximately 15% lower than SCB10. Capacity not to exceed 1.3 times calculated load. High-voltage switchgear: SF6 insulated or vacuum circuit breaker cubicles, short-circuit breaking current not less than 25kA. Low-voltage cabinets: draw-out type for easy maintenance, main circuit breaker breaking capacity not less than 65kA. Diesel generator capacity configured at 1.2 times Class 1 load; five-star hotels typically 800-1500kW. UPS: online double-conversion type recommended, backup time not less than 30 minutes.
Selection of Water Supply, Drainage and Fire Protection Equipment
Domestic water pumps: stainless steel material (304 or 316L) recommended to prevent rust. Pump efficiency not less than 75%, motor energy efficiency not less than IE3. Variable-frequency water supply equipment configured with small-flow pressure-stabilizing pump and small pressure tank. Hot water boilers: thermal efficiency not less than 92% (condensing type), heat pump COP not less than 4.0. Fire pumps must have CCCF certification; fire dampers and smoke exhaust dampers must have fire product type approval certificates. Fire pump flow and head strictly procured according to design parameters.
Procurement and Selection of Intelligent Equipment
BAS: open systems supporting BACnet/IP protocol recommended. DDC controller cost 300-600 yuan per point. Sensors: high precision selected (temperature 0.2 degrees, pressure 0.5%FS). Intelligent lighting: KNX or DALI protocol recommended, 800-1500 yuan per circuit. Guest room RCU: 3000-5000 yuan per room. Security cameras: resolution not less than 2 megapixels, storage not less than 30 days. Structured cabling: Category 6 or above recommended. Key point: ensure integration and linkage functions of all subsystems are complete to avoid information silos.