材料科學(xué)與工程 材料物理與化學(xué)，外文文獻翻譯及原文

Effect of the personalized ventilation on indoor air quality for an indoor occupantwith VOCs emission from carpet

室內(nèi)含有VOC時個性化通風(fēng)系統(tǒng)對空氣質(zhì)量的影響

Abstract
Personalized ventilation (PV) is aimed to improve the quality of inhaled air by delivering clean, humidified and temperature-controlledair directly to occupants’ breathing zone. The purpose of this paper is to investigate the effect of PV devices on the concentrations ofvolatile organic compounds (VOCs) emitted from carpet and the temperature around an occupant in an office. Numerical simulationswere conducted using the computational fluid dynamics (CFD) commercial software FLUENT 6.3 for solving the continuity, momentum,energy, turbulence and concentration equations, and the simulation results were validated against the existing experimental data [1]. Per-sonal exposure effectiveness (PEE) and manikin-based equivalent temperature change (△Teq) were used as indices to eva luate the per-formance of the PV. The results showed that the existence of the PV device greatly influenced the temperature and VOCs distributionsaround the occupant, but had little effect on those in the other parts of the office. Two eva luation indices increased with an increase of airflow rate. However, PV’s airflow rate had larger influence on Manikin-based equivalent temperature change than that on personalizedexposure effectiveness. The ventilation strategies had a great influence on the two eva luation indices, and both of them decreased with anincrease of ventilation rate. The findings of this research could contribute to the reduction of energy consumption and the improvement ofutilization of PV devices.

摘要：個性化通風(fēng)（PV）主要是通過直接向居住者呼吸空氣區(qū)域提供清潔、調(diào)濕、溫度控制以提高吸入空氣的質(zhì)量。本文旨在探討個性化通風(fēng)系統(tǒng)對從地毯中揮發(fā)出的VOC濃度和室內(nèi)溫度的影響。數(shù)值模擬采用的是計算流體動力學(xué)(CFD)商業(yè)軟件FLUENT 6.3解決連續(xù)性、動量、能源、波動和濃度方程,仿真結(jié)果驗證了現(xiàn)有的實驗數(shù)據(jù)[1]。個人暴露有效性基于人體模型等效溫度變化(△Teq)作為指標(biāo)來評估PV的性能，結(jié)果表明，PV的存在極大地影響居住者呼吸空氣區(qū)域溫度和有機揮發(fā)性化合物的分布，但對其他部分沒有任何影響。兩個評價指數(shù)隨著空氣流率的增加而增加。然而，PV的氣流速率對等效溫度變化的影響大于PEE。通風(fēng)策略對這兩個評價指標(biāo)有很大的影響，它們都隨著通風(fēng)率的增加而降低。本研究的發(fā)現(xiàn)可能有助于降低能耗和提高PV系統(tǒng)的效率。