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水面蒸发系数
相关语句
  water surface evaporation coefficient
     Calculation and Verification of an Universal Water Surface Evaporation Coefficient Formula
     水面蒸发系数全国通用公式的验证
短句来源
  相似匹配句对
     Calculation and Verification of an Universal Water Surface Evaporation Coefficient Formula
     水面蒸发系数全国通用公式的验证
短句来源
     Conversion Coefficient of Water Surface Evaporation in Tarim River Basin
     塔里木河流域水面蒸发折算系数分析
短句来源
     STUDIES ON THE FORMULAE FOR CALCULATING EVAPORATION AND HEAT LOSS COEFFICIENT FROM WATER SURFACE IN CHINA ( Ⅱ )
     水面蒸发与散热系数公式研究(二)
短句来源
     STUDIES ON THE FORMULAE FOR CALCULATING EVAPORATION AND HEAT LOSS COEFFICIENT FROM WATER SURFACE IN CHINA (Ⅰ)
     水面蒸发与散热系数公式研究(一)
短句来源
     Calculation model for water surface evaporation
     水面蒸发计算模型研究
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The paper presents the experimental results of a systematic study on the effects of various physical quantities on the mass and heat transfer at air-water interface of heated water body. Emphasis is put on the effect of water-air temperature difference. On the basis of numerous experimental data and practical experience obtained from intensive evaporation investigations of different type of water region in China, equations are recommended for the evaluation of evaporation and heat loss coefficients. The equations,...

The paper presents the experimental results of a systematic study on the effects of various physical quantities on the mass and heat transfer at air-water interface of heated water body. Emphasis is put on the effect of water-air temperature difference. On the basis of numerous experimental data and practical experience obtained from intensive evaporation investigations of different type of water region in China, equations are recommended for the evaluation of evaporation and heat loss coefficients. The equations, simple in form, not only reflect more closely the real picture of mass transfer at air-water interface, but take care of the mechanism of free and forced convection in a single expression, in harmony both in form and function.

本文是我国全国范围大规模水面蒸发及水面散热问题研究的一项成果。主要提出在气象可控专用风洞中进行的系统试验研究的结果。文中分析了气温、水面风速、水温及水气温差各个因子对水面蒸发的相关影响。特别注意了前人不曾系统研究过的水气温差对蒸发的驱送效应。 试验证明,在试验范围内,水气温差能增进水面散热的驱动能力。根据大量水槽试验资料并结合全国各地有代表性水域的现场实测经验,提出了充分考虑温差效应的水面蒸发系数公式(10)及水面综合散热系数公式(18)。公式统一了自由、强迫对流的散热机理和天然水体与受热水体的水面蒸发规律,获得了比较完整的理论上描述。可以证明,施成熙公式及国际上比较通用的Ryan-Harleman公式可认为是本文推荐公式的特例。 由于温差对水面蒸发系数的影响,还引起水面综合散热系数的增项。在一定条件下,此增项可高达20%,不容忽视。

On the basis of numerous experimental data and practical experiences obtained from extensive evaporation Investigation of different types of water regions in China,a formula of evaporation coefficient which could be universally used in China is developed and recommended.The formula,simple in form,not only reflects closely the real picture of the mass transfer at air-water interface,but takes care of the mechanism of free and forced convection in a single expression both in form and function.The new formula has...

On the basis of numerous experimental data and practical experiences obtained from extensive evaporation Investigation of different types of water regions in China,a formula of evaporation coefficient which could be universally used in China is developed and recommended.The formula,simple in form,not only reflects closely the real picture of the mass transfer at air-water interface,but takes care of the mechanism of free and forced convection in a single expression both in form and function.The new formula has been satisfactorily compared with some well-known relevant formulas and evaporation data measured directly from various water bodies.

着重介绍我国水面蒸发-散热系数研究的一项成果─—水面蒸发系数公式的计算结果与实际情况的对比,证明公式的可靠性和在全国范围内的可用性。

Based on the universal water surface evaporation coefficient formula obtained from numerous experimental data and extensive evaporation investigations of different types of water regions in China, a formula of additional evaporation loss from cooling ponds caused by waste heat rejection is recommended and compared with that used currently.

应用基于大规模的试验研究建立的水面蒸发系数- 散热系数全国通用公式B, 推导了冷却池受纳热负荷的附加蒸发计算公式。建议的附加蒸发系数值略小于原规范采用值。

 
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