復(fù)雜通風(fēng)網(wǎng)絡(luò)總風(fēng)阻快速計(jì)算方法
本文選題:安全工程 切入點(diǎn):礦山安全 出處:《安全與環(huán)境學(xué)報(bào)》2016年01期
【摘要】:為了快速計(jì)算通風(fēng)網(wǎng)絡(luò)總風(fēng)阻和當(dāng)通風(fēng)網(wǎng)絡(luò)中安裝多臺(tái)風(fēng)機(jī)時(shí)各風(fēng)機(jī)所承擔(dān)的總風(fēng)阻,將通風(fēng)網(wǎng)絡(luò)中安裝風(fēng)機(jī)的分支設(shè)置成固定風(fēng)量分支,利用通風(fēng)網(wǎng)絡(luò)回路阻力平衡定律構(gòu)建通風(fēng)網(wǎng)絡(luò)所有獨(dú)立回路阻力平衡方程;在這組方程中,存在一組含固定風(fēng)量分支的方程,其中的每個(gè)方程所對(duì)應(yīng)的回路總阻力不為0,該回路總阻力需要用安裝在每個(gè)固定風(fēng)量分支上的風(fēng)機(jī)所提供的風(fēng)壓才能抵消,使之歸零;該組方程可用于求解通風(fēng)網(wǎng)絡(luò)總風(fēng)阻和當(dāng)通風(fēng)網(wǎng)絡(luò)中安裝多臺(tái)風(fēng)機(jī)時(shí)各風(fēng)機(jī)所承擔(dān)的總風(fēng)阻。結(jié)果表明:1)當(dāng)通風(fēng)網(wǎng)絡(luò)只安裝1臺(tái)風(fēng)機(jī)時(shí),通過(guò)將打算安裝風(fēng)機(jī)的分支設(shè)為固定風(fēng)量分支,可求出當(dāng)風(fēng)機(jī)安裝在該分支時(shí)所承擔(dān)的總風(fēng)阻,該值與風(fēng)量無(wú)關(guān);對(duì)于同一個(gè)通風(fēng)網(wǎng)絡(luò),安裝風(fēng)機(jī)的分支不同,所對(duì)應(yīng)的總風(fēng)阻也不同;2)當(dāng)通風(fēng)網(wǎng)絡(luò)中安裝多臺(tái)風(fēng)機(jī)時(shí),通過(guò)將安裝風(fēng)機(jī)的所有分支均設(shè)置為固定風(fēng)量分支,可求出各風(fēng)機(jī)所承擔(dān)的總風(fēng)阻;此時(shí),1臺(tái)風(fēng)機(jī)所負(fù)擔(dān)的通風(fēng)網(wǎng)絡(luò)總風(fēng)阻與風(fēng)機(jī)數(shù)量、各風(fēng)機(jī)的輸出風(fēng)量和安裝位置相關(guān)。計(jì)算總風(fēng)阻時(shí),只要解算一次通風(fēng)網(wǎng)絡(luò),依據(jù)回路阻力代數(shù)和不為0的回路,即可求出通風(fēng)網(wǎng)絡(luò)總風(fēng)阻或多臺(tái)風(fēng)機(jī)各自所承擔(dān)的總風(fēng)阻。
[Abstract]:In order to quickly calculate the total wind resistance of ventilation network and the total wind resistance of each fan when multiple typhoon turbines are installed in the ventilation network, the branches of the installation fan in the ventilation network are set to a fixed air volume branch. All independent loop resistance equilibrium equations of ventilation network are constructed by using the law of ventilation network loop resistance balance, in which there is a set of equations with fixed air flow branch. The total resistance of the circuit corresponding to each equation is not zero, the total resistance of the loop needs to be offset by the wind pressure provided by the fan installed on each fixed air flow branch, and the total resistance can be reduced to zero. The set of equations can be used to solve the total wind resistance of ventilation network and the total wind resistance of each fan when the ventilation network is equipped with multiple typhoon engines. The results show that when only one typhoon is installed in the ventilation network, By setting the branch to which the fan is intended to be installed as a fixed air flow branch, the total air resistance incurred when the fan is installed in the branch, which is independent of the air volume, can be calculated; for the same ventilation network, the branch of the fan is different. The corresponding total air resistance is also different (2) when multiple typhoon machines are installed in the ventilation network, the total air resistance of each fan can be calculated by setting all the branches of the installation fan to the fixed air volume branch. At this time, the total air resistance of the ventilation network is related to the number of fans, the output air volume of each fan and the installation position. When calculating the total air resistance, only one ventilation network can be solved, according to the algebra of loop resistance and the circuit not equal to zero, The total wind resistance of ventilation network or the total wind resistance of multiple typhoon machines can be calculated.
【作者單位】: 西安建筑科技大學(xué)管理學(xué)院;
【基金】:陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃重點(diǎn)項(xiàng)目(2015JZ010) 陜西省社會(huì)科學(xué)基金項(xiàng)目(2014P07) 陜西省科學(xué)技術(shù)研究發(fā)展計(jì)劃項(xiàng)目(2013K11-17)
【分類號(hào)】:TD722
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