双源竖直环状管网设计及联合运行分析
Design and joint operation analysis of double-source vertical ring pipe network
摘要：
介绍了螺杆式冷水机组+空气源热泵双冷热源系统形式的特点、环状管网系统设计及其水力计算方法。分析了在单独运行状态下管网的水力特性及冷水机组和空气源热泵联合运行时的水力工况。介绍了总供回水温差控制的优缺点及节能率。
关键词：空气源热泵；竖直环状管网；联合运行；管网阻力；控制策略
Abstract：
This paper presents the characteristics of the double cold and heat source system adopting screw chillers and air-source heat pumps, and the design and the hydraulic calculation method of the ring pipe network. This paper analyses the hydraulic characteristics of pipe network under the separate operation, and the hydraulic condition under the joint operation of screw chillers and air-source heat pumps. The advantages and disadvantages of the temperature difference control of total supply and return water and the energy saving rate are presented.
Keywords:air-source heat pump; vertical ring pipe network; joint operation; resistance of pipe network; control strategy