Experimental studies on nucleate pool boiling heat transfer to ethanol/MEG/DEG ternary mixture as a new coolant
Experimental studies on nucleate pool boiling heat transfer to ethanol/MEG/DEG ternary mixture as a new coolant
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DOI：
10.2298/ciceq111116033s
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发表时间：
2012
影响因子：
1.2
通讯作者：
M. Sarafraz;S. Peyghambarzadeh;Seyed Ali Alavi Fazel
中科院分区：
文献类型：
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作者：
M. Sarafraz;S. Peyghambarzadeh;Seyed Ali Alavi Fazel
本文研究了以乙醇、一甘醇(MEG)和二甘醇(DEG)为新型冷却剂的三元混合工质核态池沸腾换热系数。为此，对不同浓度的MEG和DEG以及不同热流密度下的池沸腾换热系数进行了实验测量。结果表明，与水/MEG/DEG三元混合物相比，水/MEG/DEG三元混合物具有更高的换热系数。特别是，在高热流密度下，乙醇/MEG/DEG混合物的沸腾换热系数较高。此外，还将实验数据与已知的现有关联式进行了比较。比较结果表明，预测乙醇/MEG/DEG体系传热系数最准确的关联式是我们在前期工作中得到的修正的Stephan-Preuser关联式。
In this paper, nucleate pool boiling heat transfer coefficient of ternary mixtures of ethanol, monoethylene glycol (MEG) and diethylene glycol (DEG) as a new coolant with higher heat transfer coefficient has been investigated. Therefore, at varied concentrations of MEG and DEG and also at different heat fluxes, pool boiling heat transfer coefficients, have been experimentally measured. Results demonstrated the higher heat transfer coefficient in comparison with Water/MEG/DEG ternary mixture. In particular, at high heat fluxes, for ethanol/MEG/DEG mixture, higher boiling heat transfer coefficient is reported. Besides, experimental data were compared to well-known existing correlations. Results of this comparison express that the most accurate correlation for predicting the heat transfer coefficient of ethanol/MEG/DEG is modified Stephan - Preuser which has been obtained in our earlier work.