严寒地区太阳墙新风系统节能模拟分析

Energy Simulation Analysis of Solar Wall Fresh Air System in Severe Cold Region

目的通过对我国严寒地区供暖期各月份太阳墙新风系统的数值模拟,分析单位面积太阳墙可以提供的满足送风条件的新风量,论证太阳墙新风系统在严寒地区应用的可行性及节能减排效应.方法建立太阳墙的三维模型,应用计算流体力学软件FLUENT的可实现k-ε模型,分别对不同月份、不同出口风速工况进行数值模拟.结果太阳墙的空气出口温度受太阳辐射强度和室外空气温度共同影响,且随着风量的增大,受室外空气温度的影响越来越大;同时,出口空气温升与出口质量流量近似成反比.沈阳地区11月至次年3月份每平方米太阳墙能提供的满足送风条件的新风量为21.6～53.6m3/h.结论在严寒地区可以应用太阳墙新风系统提供满足送风条件的新风量且节能效应显著.

Through the numerical simulation of solar wall system of heating period in severe cold region of China,the volume of fresh air,which per centiare solar wall panel can heat and meet the air supply conditions,is analyzed.The feasibility and energy-conservation effect of Solar Wall System in severe cold region of China is also verified.A 3D model is established.The Realizable k-epsilon model of the CFD Simulation Software FLUENT is applied to simulate conditions of different outlet velocity in each month during heating period.The conclusion is that solar radiation intensity and outdoor air temperature comprehensively affect the outlet air temperature of solar wall system.Moreover,with the increase of outflow,the outdoor air temperature gradually becomes the dominant factor.In addition,the rising temperature is inversely proportional to outflow.From November to March of next year,per centiare solar wall panel can heat from 21.6 to 53.6 m3/h of fresh air,which can well meet the air supply condition during heating period in Shenyang.Therefore,Solar Wall Air System is available in heating the fresh air and significant in energy conservation.What is more,the fresh air supply is within the capacity of the system,proving that the system is applicable and has significant energy-saving effect in our severe cold regions.