图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
强化传热期刊
影响因子: 1.406 5年影响因子: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN 打印: 1065-5131
ISSN 在线: 1563-5074

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.v8.i2.20
pages 77-90

Effect of Hydraulic Diameter on Condensation of R-134A in Flat, Extruded Aluminum Tubes

Ralph L. Webb
Department of Mechanical Engineering The Pennsylvania State University, University Park, PA 16802, USA
Specialist in enhanced heat transfer and heat exchanger design
Kemal Ermis
Sakarya University, Sapanca MYO, Dept. Mechanical Engineering, Sakarya, Turkey

ABSTRACT

This paper addresses the effect of hydraulic diameter on single-phase and condensation heat transfer and pressure gradient for R-I34a in multi-port flat extruded aluminum tubes. The hydraulic diameter range of the four tubes tested is between 0.44 and 1.56 mm. This work is believed to provide condensation data on the smallest hydraulic diameters reported in the literature. The modified Wilson plot method was used to determine the heat transfer coefficient for water-side flow in the annulus. The data span 300−1000kg/m2-s mass velocity and approximately 15-to-90% vapor qualities. The condensation coefficient and pressure gradient increases with decreasing hydraulic diameter for all tubes. The effect of hydraulic diameter on condenser design and operation is also discussed. The ability of existing correlations to predict the single-phase and condensation coefficients are evaluated.


Articles with similar content:

CONVECTIVE CONDENSATION OF R410A IN MICRO-FIN TUBES
Journal of Enhanced Heat Transfer, Vol.19, 2012, issue 6
Xu Wang, Zan Wu, Guan-min Zhang, Wei Li
Parameter Comparison of Condensation Heat Transfer of R134a Outside Horizontal Low-Finned Tubes
International Heat Transfer Conference 15, Vol.3, 2014, issue
Zhen Zhang, Ya-Ling He, Wentao Ji, Jiadi Du, Xiaowei Fan, Wen-Quan Tao, Ding-cai Zhang
Oval Finned Tube Condenser and Design Pressure Limits
Journal of Enhanced Heat Transfer, Vol.8, 2001, issue 3
Ajay Iyengar, Ralph L. Webb
HEAT TRANSFER AND PRESSURE DROP DURING FLOW BOILING OF R134a AND R404A IN A MICROFIN TUBE AT LOW MASS FLUXES
International Heat Transfer Conference 13, Vol.0, 2006, issue
Hans Mueller-Steinhagen, Klaus K. Spindler
CHARACTERIZATION OF A TRIPLE CONCENTRIC-TUBE HEAT EXCHANGER WITH CORRUGATED TUBES USING ARTIFICIAL NEURAL NETWORKS (ANN)
International Heat Transfer Conference 16, Vol.13, 2018, issue
Jose A. Almendros-Ibanez, Juan I. Corcoles-Tendero, Juan F. Belmonte, Jose D. Moya, Antonio E. Molina