EFFECT OF OPERATING CONDITIONS ON THE PERFORMANCE OF THE BUBBLE PUMP OF ABSORPTION-DIFFUSION REFRIGERATION CYCLES

被引：21

作者：

Benhmidene, Ali ^{[1
]}

Chaouachi, Bechir ^{[1
]}

Bourouis, Mahmoud ^{[2
]}

Gabsi, Slimane ^{[1
]}

机构：

[1] Natl Sch Engn Gabes, Res Unit Environm Catalysis & Proc Anal URECAP, Gabes, Tunisia

[2] Univ Rovira & Virgili, Dept Mech Engn, Tarragona, Spain

来源：

THERMAL SCIENCE | 2011年 / 15卷 / 03期

关键词：

bubble pump; two-fluid model; simulation; heat flux; operating conditions; BOILING HEAT-TRANSFER; 2-FLUID MODEL; 2-PHASE FLOW; MIXTURES; SYSTEM; FLUIDS; TUBES;

D O I：

10.2298/TSCI100601002B

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The mathematical model will be able to predict the operated condition (required tube diameters, heat input, and submergence ratio .... ). That will result in a successful bubble pump design and hence a refrigeration unit. In the present work a one-dimensional two-fluid model of boiling mixing ammonia-water under constant heat flux is developed The present model is used to predict the outlet liquid and vapor velocities and pumping ratio for different heat flux input to pump. The influence of operated conditions such as: ammonia fraction in inlet solution and tube diameter on the functioning of the bubble pump is presented and discussed It was found that, the liquid velocity and pumping ratio increase with increasing heat flux, and then it decreases. Optimal heat flux depends namely on tube diameter variations. Vapor velocity increases linearly with increasing heat flux under designed conditions.

引用

页码：793 / 806

页数：14

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