Boiling heat transfer and pressure drop of ammonia-lithium nitrate solution in a plate generator

被引：36

作者：

Zacarias, A. ^{[2
]}

Ventas, R. ^{[1
]}

Venegas, M. ^{[1
]}

Lecuona, A. ^{[1
]}

机构：

[1] Univ Carlos III Madrid, Dept Ingn Term & Fluidos, Madrid 28911, Spain

[2] Inst Politecn Nacl, Acad Term ESIME Azcapotzalco, Mexico City 02550, DF, Mexico

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2010年 / 53卷 / 21-22期

关键词：

Ammonia-lithium nitrate solution; Boiling heat transfer; Fusion plate heat exchanger; Plate generator; Pressure drop; VAPOR-LIQUID-EQUILIBRIUM; PLUS WATER; FLOW; NUCLEATE; R-134A; REFRIGERANTS; PERFORMANCE; EVAPORATION; EXCHANGERS; MIXTURES;

D O I：

10.1016/j.ijheatmasstransfer.2010.06.015

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents the thermal and pressure-drop experimental evaluation of a fusion plate heat exchanger (PHE) during boiling conditions of a solution of lithium nitrate in ammonia. The data are representative of the working conditions of generators in single-effect absorption chillers. The solution flow rate and outlet temperature were modified in the ranges of 0.041-0.083 kg/s and 78-95 degrees C, respectively. Correlations for single-phase-flow heat transfer are used to characterize the boiling heat transfer. The influences of the heat flux, mass flux and exit-vapour quality are analyzed. Boiling heat-transfer coefficients and correlations for the Nusselt number are obtained. Results are compared with Cooper's and Ayub's correlations for boiling heat transfer. Pressure drop in the solution side was also measured and one correlation was obtained to characterize the frictional pressure drop under boiling conditions. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4768 / 4779

页数：12

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