置换通风空调系统的节能性分析

目的通过对置换通风空调系统能耗因素的理论分析和实例计算。证明置换通风空调系统的节能优势，方法以置换通风空调系统的节能性为研究重点，对冷负荷、送风量、送风温度及新风量进行理论探讨。并通过实例，与传统空调系统比较，量化其节能效果．结果理论探讨和实例计算表明，与传统空调系统比较，该系统具有节能降耗的效果，同时，得到新风量、换气次数、制冷量和节能率之间的变化规律，证明在较高空气品质条件下，仍能达到节能效果．结论与传统空调系统相比，置换通风空调系统送风量节省55．29％；同时．制冷量减少56．16％．当换气次数增至2．6次／h时，仍可节约制冷量19．84％．

Analysis of Energy Efficiency of Displacement Ventilation AirConditioning System

The aim of this paper is to prove that displacement ventilation air-conditioning system has higher energy efficiency through theoretical analysis of its energy consumption and the computation of practical example.With energy efficiency being the focus,its cooling load,air volume,air volume temperature,and its fresh air volume are all analyzed theoretically and practically,and its energy efficiency is quantified and compared with traditional air-conditioning system.The result shows that,compared with traditional air-conditioning system,the new one has better energy efficiency.Besides,the rule of change among fresh air volume,air exchange rate,cooling load and energy efficiency rate is found,reflecting that with higher indoor air quality,the sgsfem could save energy as well.It turns out that in comparison with traditional air-conditioning system,the displacement ventilation air-conditioning system cuts the air volume by 55.29% and decreases its proportion of whole cool load by 56.16% in the practical example.Air exchange rate increases to2.6 time/h while its load is still saved by 19.84%.