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暖通空调杂志社>期刊目次>2018年>第12期

建筑高度对空调新风负荷影响分析

Influence of building height on load from outdoor air of air conditioning

王世林 龚延风
南京工业大学

摘要:

为分析建筑高度对超高层建筑空调新风负荷的影响,从理论上分析了室外气象参数的竖直变化规律及室外空气比焓的变化规律。以南京市为例,分别分析了100~1 000 m不同新风引入高度处连续运行工况和间歇运行工况下单位风量新风负荷。结果表明:随着新风引入高度的增加,夏季新风负荷降幅大于冬季新风负荷增幅,全年单位风量新风负荷呈降低趋势;当新风引入高度为200,500,800,1 000 m时,较地面基准新风负荷,连续运行工况下全年累计单位风量新风负荷分别下降了10.3%,22.8%,31.9%,36.2%,间歇工况下全年单位风量新风负荷分别下降了10.5%,23.2%,32.5%,37.1%。

关键词:新风负荷,新风引入高度,超高层建筑,逐时气象参数,空调设计计算

Abstract:

For analysing the influence of building height on load from outdoor air of air conditioning in super high-rise buildings, analyses the variation laws of outdoor meteorological parameters and outdoor air specific enthalpy in vertical direction. Taking Nanjing as an example, analyses the unit load from outdoor air under continuous and intermittent operation conditions at different outdoor air introduction height of 100 to 1 000 m. The results indicate that with the increase of outdoor air introduction height, summer cooling load from outdoor air decreases and winter heating load from outdoor air increases. Bigger decline of cooling load and smaller rise of heating load lead to the decline of the annual unit load from outdoor air. When the outdoor air introduction height is 200, 500, 800, 1 000 m, comparing to the basis of load from outdoor air, the annual cumulative unit load from outdoor air decreases 10.3%, 22.8%, 31.9%, 36.2% under the continuous operation conditions respectively, and 10.5%, 23.2%, 32.5%, 37.1% under the intermittent operation conditions respectively.

Keywords:loadfromoutdoorair,outdoorairintroductionheight,superhigh-risebuilding,hourlymeteorologicalparameter,airconditioningdesigncalculation

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