成都東壹图书馆暖通系统分析

Analysis of HVAC Schemes Chengdu Dongyi Library

本项目为成都東壹图书馆,建筑的整体形态像一朵漂浮在公园上空的云,整体项目美学感官良好。首先,空调系统经计算确定图书馆负荷,空调系统采用2台模块式风冷涡旋热泵机组,机组冷水进出水温度为12℃/7℃,热水进出水温度为40/45℃。空调冷热水系统均采用负荷侧变流量的闭式两管制一级泵异程式系统。冷水供回水温度为7/12℃,热水供回水温度为45/40℃。选用自带水力模块的风冷涡旋热泵机组,空调水系统由水力模块中的膨胀罐定压,水力模块主要包含水泵、过滤器、膨胀罐、安全阀、压力表、放气阀、流量开关、流量调节阀、补水阀等。在气流组织方面,1F图书馆大空间区域采用单风道一次回风定风量全空气系统,可调新、回风比,在过渡季节可实现全新风运行。气流组织形式为上送上回。2F图书馆大空间区域采用单风道二次回风定风量全空气系统,利用二次回风提高送风温度。采用可调新、回风比,在过渡季节可实现全新风运行。结合室内布置的座位等均匀布置送风口。为保证现场舒适性空调效果良好,在风口的设计和选型上做了进一步的对比,通过现场实测风口过滤网孔隙的大小,选择了更优的3mm孔径的过滤网。在排烟系统的设计上,基于图书馆本身的结构形式和幕墙效果,故优先考虑自然排烟电动排烟窗的形式。

The name of this project is Chengdu Dongyi Library.The building is like a cloud floating above the park.Firstly,we determined the air conditioning load of the library through calculation.The air conditioning system consists of two modular air-cooled vortex heat pump units.The cold water inlet and outlet temperature of the air conditioning unit is 12℃/7℃,and the hot water inlet and outlet temperature is 40/45℃.The air conditioning hot and cold water systems all adopt a closed two pipe primary pump with variable flow rate on the load side.We choose an air-cooled vortex heat pump unit with a built-in hydraulic module.The air conditioning water system is pressurized by an expansion tank in the hydraulic module,which mainly includes a water pump,filter,expansion tank,safety valve,pressure gauge,vent valve,flow switch,flow control valve,and makeup valve.In terms of air flow organization,the large space area of the library adopts a single air duct single return air fixed air volume all air system,with adjustable fresh and return air ratios,which can achieve fresh air operation during the transition season.The air flow organization is in the form of upward feeding and upward returning.We will evenly arrange the air supply vents based on the indoor seating arrangements.To ensure good on-site comfort and air conditioning effect,further comparison was made in the design and selection of air vents.Through on-site measurement of the pore size of the air vent filter mesh,a more optimal 3mm pore size filter mesh was selected.In the design of the smoke exhaust system,based on the structural form and curtain wall effect of the library itself,the form of natural smoke exhaust electric smoke exhaust windows is given priority.