HVAC system design for ward complex building in Xifeng People’s Hospital

To build a green, comfortable and healthy hospital building, ground-source heat pump is used as cold and heat sources with three-spiral pipe in the mosaic foundation being the ground heat exchanger. The air conditioning system are so designed as double-side floor radiation system in patient zone and fan coil system in office zone, adjustable distributed fan ventilation system are used in all zones. Analyses the characteristics and engineering practicability of foundation spiral pipe ground heat exchanger and proposes the three-spiral pipe mode which is more convenient to maintain and repair. The thermal performance test shows that the heat rejection and absorbed heat is 19.5 W/m and 14 W/m respectively. Discusses the engineering applicability of double-side floor radiation and distributed fan ventilation.