噴霧降溫外場(chǎng)試驗(yàn)結(jié)果的初步分析

doi:10.3969/2013jms.0053

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噴霧降溫外場(chǎng)試驗(yàn)結(jié)果的初步分析
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                        10.3969/2013jms.0053
                    
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基金項(xiàng)目:重慶市自然科學(xué)基金院士專項(xiàng)（CSTC2011JJYS20001）；重慶市自然科學(xué)基金（CSTC2012JJA20015）；重慶市氣象局青年基金（QNJJ-201109）；重慶市氣象局開(kāi)放式研究基金（KFJJ-201202）

Preliminary analysis on field test of spray cooling technology

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利用重慶市2011年盛夏高溫天氣，開(kāi)展了噴霧降溫改善局部小氣候的外場(chǎng)試驗(yàn)。試驗(yàn)結(jié)果表明：高溫天氣下，在廣場(chǎng)上進(jìn)行噴霧具有明顯降溫、改善人體舒適度的效果。降溫幅度上午小，下午大。噴霧降溫效果存在明顯的垂直梯度變化，地表溫度降幅最大，1.5 m氣溫次之，2.2 m氣溫降幅最小。噴霧工藝條件對(duì)降溫效果有明顯影響，噴頭型號(hào)不同，地表溫度的降幅差別較大，但各高度層降溫效果差別不大。噴霧“噴-?！毖h(huán)時(shí)間的長(zhǎng)短與噴霧區(qū)域溫度的變化有明顯聯(lián)系，噴的時(shí)間越長(zhǎng)，噴霧區(qū)域溫度降低的幅度就越大。環(huán)境風(fēng)場(chǎng)狀況對(duì)噴霧降溫效果也有明顯影響。本試驗(yàn)中，受試驗(yàn)場(chǎng)地周圍環(huán)境影響，偏東風(fēng)比偏西風(fēng)條件下的降溫效果好，噴霧降溫效果總體隨風(fēng)速的增大而有所降低。

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The field test of spray cooling technology was carried out in order to improve the local climate in the high-temperature days in the summer of Chongqing in 2011. The results show that mist spray on the public square in high-temperature weather can decrease the temperature and improve the human body comfort index obviously. The cooling-down range was limited in the morning but wide in the afternoon. An obvious vertical change existed in cooling effects, the widest cooling-down range was on the ground surface, the second was at 1.5 m and the minimum was at 2.2 m. The influence of spray technics on cooling effects was evident. Different types of nozzle head had different effects on the reducing scope of ground surface temperature, but had no effects on the air temperatures at other altitudes. There existed obvious relation between cycle time of "spray-stop" and the change of environment temperature. The longer the spray time was, the larger the declining scope of environment temperature was. The cooling effects depended evidently on the environment wind field. In this test, the cooling effects were better under easterly wind than those under westerly one. Moreover, in general the cooling effect reduced with the acceleration of wind speed.

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何澤能,鐘志華,高陽(yáng)華,陳志軍,楊雪梅.噴霧降溫外場(chǎng)試驗(yàn)結(jié)果的初步分析.氣象科學(xué),2014,34(4):435-442 HE Zeneng, ZHONG Zhihua, GAO Yanghua, CHEN Zhijun, YANG Xuemei. Preliminary analysis on field test of spray cooling technology. Journal of the Meteorological Sciences,2014,34(4):435-442

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收稿日期:2012-11-12
最后修改日期:2013-06-02
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在線發(fā)布日期: 2014-08-29
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