脱硫石膏灌芯墙水分传递规律的计算与验证
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摘要
纸面石膏板隔墙中灌入脱硫石膏浆体形成脱硫石膏灌芯墙,既可以高效利用低品质脱硫石膏,又可以有效解决空心隔墙的隔音问题,但脱硫石膏灌芯墙水分传递特性尚不清楚,因此通过实验确定了脱硫石膏灌芯墙在不同相对湿度下的蒸发特性,同时引入多孔材料蒸发模型进行简化和验证。结果表明:脱硫石膏灌芯墙的蒸发速率随环境相对湿度降低呈现非线性增加特性;简化后的Hertz-Knudsen-Langmuir (HKL-S)蒸发模型仅可在较高湿度范围内(≥55%)对脱硫石膏灌芯墙的蒸发速率进行可靠预测,而简化后Statistics-Rate-Theory (SRT-S)模型能够在几乎全湿度范围内准确预测脱硫石膏灌芯墙在蒸发速率,同时减少了试验测定系数,易于在实际工程根据环境湿度预测和控制脱硫石膏灌芯墙的施工进度。
The desulfurization-gypsum-filling-wall( DSG-FW) formed by pouring into plasterboard partitions with desulfurization gypsum slurry,can utilize effectively the low quality desulphurization gypsum,and also solve the noise problem of hollow partitions. However,the construction schedule of this wall is unable to be in control because the moisture transfer characteristics in DSG-FW is not clear.Therefore,it is necessary to study the law of water transport of GGW. The evaporation characteristics of desulfurization gypsum slurry in DSG-FW under different relative humidity was determined experimentally. At the same time,two types of porous material evaporation models were introduced and then simplified to simulate the moisture transfer behavior. The results show that the evaporation rate of DSG-FW increased nonlinearly with the decrease of relative humidity under which the DSG-FW is conditioned; the simplified Hertz-Knudsen-Langmuir( HKL-S) model can only be used to predict reliably the evaporation behavior at the higher relative humidity range( more than 55% RH),while the simplified Statistics-Rate-Theory( SRT-S) model is verified to be able to predict the evaporation rate in almost the whole relative humidity range. And the SRT-S model is of good prospect to predict and control accurately the construction of DSG-FW in actual engineering.
The desulfurization-gypsum-filling-wall( DSG-FW) formed by pouring into plasterboard partitions with desulfurization gypsum slurry,can utilize effectively the low quality desulphurization gypsum,and also solve the noise problem of hollow partitions. However,the construction schedule of this wall is unable to be in control because the moisture transfer characteristics in DSG-FW is not clear.Therefore,it is necessary to study the law of water transport of GGW. The evaporation characteristics of desulfurization gypsum slurry in DSG-FW under different relative humidity was determined experimentally. At the same time,two types of porous material evaporation models were introduced and then simplified to simulate the moisture transfer behavior. The results show that the evaporation rate of DSG-FW increased nonlinearly with the decrease of relative humidity under which the DSG-FW is conditioned; the simplified Hertz-Knudsen-Langmuir( HKL-S) model can only be used to predict reliably the evaporation behavior at the higher relative humidity range( more than 55% RH),while the simplified Statistics-Rate-Theory( SRT-S) model is verified to be able to predict the evaporation rate in almost the whole relative humidity range. And the SRT-S model is of good prospect to predict and control accurately the construction of DSG-FW in actual engineering.
引文
[1]丁杨,魏永起,周双喜.脱硫石膏灌芯墙干燥时间影响因素分析[J].新型建筑材料,2017,44(6):70-72.
[2]杨明.多孔介质热质传递耦合形式分析[D].昆明:昆明理工大学,2017:14-16.
[3]刘建昌.严寒地区外墙保温系统热湿耦合传递特性研究[D].重庆:重庆大学,2017:10-13.
[4]於德美,关博文,申爱琴,等.非饱和混凝土氯离子传输模型及参数分析[J].硅酸盐通报,2017,36(4):1130-1135.
[5]张磊,关见朝,王友胜,等.悬移质泥沙输移扩散方程适用条件的讨论[J].水利学报,2018(6):694-702.
[6]姜柏材,郭和坤,沈瑞,等.基于热力学平衡方程的孔隙度实验方法研究[J].科学技术与工程,2016,16(23):150-154.
[7]薛冰,姚志敏,盛遵荣,等.颗粒分布对吸附热变换器内传热传质的影响[J].化工学报,2016,67(s1):174-180.
[8]Persad A H,Ward C A.Expressions for the evaporation and condensation coefficients in the Hertz-Knudsen relation[J].Chemical Reviews,2016,1(14):695-700.
[9]Zandavi S H,Ward C A.Vapour adsorption kinetics:statistical rate theory and zeta adsorption isotherm approach[J].Physical Chemistry Chemical Physics Pccp,2016,18(36):25538-25545.
[10]Schobesberger S,D'Ambro E L,Lopez-Hilfiker F D,et al.A model framework to retrieve thermodynamic and kinetic properties of organic aerosol from composition-resolved thermal desorption measurements[J].Atmospheric Chemistry&Physics,2018:1-50.
[11]Marek R,Straub J.Analysis of the evaporation coefficient and the condensation coefficient of water[J].International Journal of Heat&Mass Transfer,2001,44(1):39-53.
[12]Hickman K,Kayser W.Temperature determinations of the vapor-liquid interface surface temperature determinations[J].Journal of Colloid&Interface Science,1975,52(3):578-581.
[13]Cai T T,Zhang A.Rate-optimal perturbation bounds for singular subspaces with applications to high-dimensional statistics[J].Annals of Statistics,2018,46(1):60-89.
[2]杨明.多孔介质热质传递耦合形式分析[D].昆明:昆明理工大学,2017:14-16.
[3]刘建昌.严寒地区外墙保温系统热湿耦合传递特性研究[D].重庆:重庆大学,2017:10-13.
[4]於德美,关博文,申爱琴,等.非饱和混凝土氯离子传输模型及参数分析[J].硅酸盐通报,2017,36(4):1130-1135.
[5]张磊,关见朝,王友胜,等.悬移质泥沙输移扩散方程适用条件的讨论[J].水利学报,2018(6):694-702.
[6]姜柏材,郭和坤,沈瑞,等.基于热力学平衡方程的孔隙度实验方法研究[J].科学技术与工程,2016,16(23):150-154.
[7]薛冰,姚志敏,盛遵荣,等.颗粒分布对吸附热变换器内传热传质的影响[J].化工学报,2016,67(s1):174-180.
[8]Persad A H,Ward C A.Expressions for the evaporation and condensation coefficients in the Hertz-Knudsen relation[J].Chemical Reviews,2016,1(14):695-700.
[9]Zandavi S H,Ward C A.Vapour adsorption kinetics:statistical rate theory and zeta adsorption isotherm approach[J].Physical Chemistry Chemical Physics Pccp,2016,18(36):25538-25545.
[10]Schobesberger S,D'Ambro E L,Lopez-Hilfiker F D,et al.A model framework to retrieve thermodynamic and kinetic properties of organic aerosol from composition-resolved thermal desorption measurements[J].Atmospheric Chemistry&Physics,2018:1-50.
[11]Marek R,Straub J.Analysis of the evaporation coefficient and the condensation coefficient of water[J].International Journal of Heat&Mass Transfer,2001,44(1):39-53.
[12]Hickman K,Kayser W.Temperature determinations of the vapor-liquid interface surface temperature determinations[J].Journal of Colloid&Interface Science,1975,52(3):578-581.
[13]Cai T T,Zhang A.Rate-optimal perturbation bounds for singular subspaces with applications to high-dimensional statistics[J].Annals of Statistics,2018,46(1):60-89.