本文着眼于一种回收湿焓的新风换气节能空调,基于Volume of Fluid算法,建立其核心换热部件波纹板换热器板外两相流传热传质的计算模型,并利用该模型模拟分析了壁面热流密度、喷淋水入口温度、喷淋水量、气相进口速度及板间距等因素对板外传热性能的影响。结果表明:热流密度对壁面温度、两相界面温度的影响是线性的;壁面热流密度增大、冷却水喷淋密度减小、气相进口速度提高、板间距减小对传热传质效果具有强化作用。
This paper focus on wet enthalpy recycling energy-saving fresh air condition.Established a computational model of corrugated plate evaporative condenser base on the volume of fluid(VOF) method.Using this model,this paper simulated and analyzed the influence factors of the plate heat transfer performance,such as heat flux density,water inlet temperature,water spray,gas inlet velocity and plate spacing.Results show that:the effects of heat flux on the wall temperature and gas-liquid interface temperature is linear;in the same heat flux,the interface temperature be reduced accordingly with the spray density increases;increasing gas flow rate or reducing the plate space can play the role of enhancing heat transfer.
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