【摘要】：在火電廠中,環(huán)境風(fēng)的速度和方向皆會對間接空冷塔的冷卻性能產(chǎn)生重要影響,本文為了研究環(huán)境自然風(fēng)對火電廠間接空冷塔冷卻性能的影響,建立空冷塔入口處導(dǎo)風(fēng)板的溫度場和動力場三維數(shù)值計(jì)算模型,采用SRF模型模擬導(dǎo)風(fēng)板旋轉(zhuǎn),對塔內(nèi)空氣動力場及溫度場進(jìn)行三維數(shù)值模擬,獲得了相應(yīng)的速度場和溫度場。將數(shù)值模擬與實(shí)驗(yàn)結(jié)果進(jìn)行對比,得到側(cè)風(fēng)下導(dǎo)風(fēng)板數(shù)量及旋轉(zhuǎn)速度對間接空冷塔的冷卻性能影響規(guī)律。研究表明,不加導(dǎo)風(fēng)板,在5 m/s風(fēng)速下,空冷塔冷卻性能嚴(yán)重惡化,設(shè)置8塊導(dǎo)風(fēng)板后,換熱量可提高1 5.08%,并且將導(dǎo)風(fēng)板旋轉(zhuǎn)后,換熱量可以進(jìn)一步提高,換熱量隨著旋轉(zhuǎn)速度的增加呈現(xiàn)先減小后增大的趨勢。
[Abstract]:In the thermal power plant, the speed and direction of the ambient wind will have an important impact on the cooling performance of the indirect air-cooled tower. In order to study the influence of the natural wind on the cooling performance of the indirect air-cooled tower in the thermal power plant, Three dimensional numerical model of temperature field and dynamic field of air cooling tower entrance guide plate is established. SRF model is used to simulate the rotation of air guide plate. The aerodynamic field and temperature field in tower are simulated by three dimensional numerical simulation, and the corresponding velocity field and temperature field are obtained. By comparing the numerical simulation with the experimental results, the effects of the number of the guide plates and the rotation speed on the cooling performance of the indirect air-cooled tower are obtained. The results show that the cooling performance of the air cooling tower deteriorates seriously under the wind speed of 5 m / s without the air guide plate. The heat transfer can be increased by 15. 08 after 8 air guide plates are installed, and the heat transfer can be further improved after the wind guide plate is rotated. With the increase of rotation speed, the heat transfer shows a tendency of decreasing first and then increasing.
【作者單位】： 中國礦業(yè)大學(xué)電力工程學(xué)院;
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(No.2015XKMS059) 江蘇省2013年度研究生教育教學(xué)改革研究與實(shí)踐課題(No.JGLX13_105) 中國礦業(yè)大學(xué)大學(xué)生創(chuàng)新創(chuàng)業(yè)基金資助大學(xué)生創(chuàng)新項(xiàng)目
【分類號】：TM621

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