Vapor−Liquid Equilibrium Study of an Absorption Heat Transformer Working Fluid of (HFC-32 + DMF)
Vapor−Liquid Equilibrium Study of an Absorption Heat Transformer Working Fluid of (HFC-32 + DMF)
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DOI：
10.1021/je1011295
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发表时间：
2011-02
影响因子：
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通讯作者：
X. Han;Yingjie Xu;Zanjun Gao;Qin Wang;Guangming Chen
中科院分区：
文献类型：
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作者：
X. Han;Yingjie Xu;Zanjun Gao;Qin Wang;Guangming Chen
吸收式热变压器（AHT）是利用低品位能源驱动的重要节能装置。在这项工作中，二氟甲烷（HFC-32）和N,N-二甲基甲酰胺（DMF）的混合物被认为是一种有前途的新型AHT工作流体。 (HFC-32 + DMF) 的气液平衡数据是使用具有连续气相循环的平衡装置在 (283.15 至 363.15) K 的温度范围内测量的。整个实验过程中，没有出现分层或沉淀产生，平衡池内液体颜色在实验前后相同。上述结果表明HFC-32和DMF可以以任何比例互溶。使用NRTL模型对实验数据进行关联。压力平均相对偏差为1.65%，压力最大相对偏差为4.24%。计算结果与实验数据吻合良好。结果表明，该混合物表现出负...
The absorption heat transformer (AHT) is an important energy-saving device that can be driven by low-grade energy. In this work, the mixture of difluoromethane (HFC-32) and N,N-dimethylformamide (DMF) is considered as a promising new working fluid for AHTs. Vapor−liquid equilibrium data for (HFC-32 + DMF) were measured over the temperature range from (283.15 to 363.15) K using an equilibrium apparatus with continuous vapor-phase circulation. Throughout the overall experiment, there was no stratification or sediment generation, and the color of the liquid in the equilibrium cell was the same before and after the experiment. The above-mentioned results suggest that any ratio of HFC-32 and DMF could be miscible. The experimental data were correlated using the NRTL model. The average relative deviation of the pressure was 1.65 %, and the maximum relative deviation of the pressure was 4.24 %. The calculated results showed good agreement with the experimental data. It is shown that the mixture exhibits a negati...