Effectiveness and optimum jet velocity for a plane jet air curtain used to restrict cold room infiltration

被引：92

作者：

Foster, A. M.

Swain, M. J.

Barrett, R.

D'Agaro, P.

James, S. J.

机构：

[1] Univ Bristol, FRPERC, Bristol BS40 5DU, Avon, England

[2] Univ Bristol, Dept Aeronaut Engn, Bristol BS8 1TR, Avon, England

[3] Univ Udine, Dipartimento Energet & Macchine, I-33100 Udine, Italy

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2006年 / 29卷 / 05期

关键词：

cold room; air curtain; efficiency; optimization; speed; jet; air;

D O I：

10.1016/j.ijrefrig.2005.12.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effectiveness of a 1.0 m wide air curtain fitted over a 1.36 m wide entrance to a cold store has been evaluated. It was shown that careful setting up of the air curtain (adjusting the jet, velocity and angle) was needed, this achieved an effectiveness of 0.77 compared to the initial value of only 0.31 as set by the installer. An analytical model to predict the optimum jet velocity was compared to measured data. It is important to choose the correct safety factor (an increase in the jet velocity) for this model, as an effectiveness of between 0.37 and 0.70 could be produced using the range of safety factors found in the literature. A 2D computational fluid dynamics (CFD) model predicted a maximum effectiveness of 0.84 and showed how the effectiveness of the curtain was related to the shape of the jet and how this varied with jet velocity and door open duration. (c) 2006 Elsevier Ltd and IIR. All rights reserved.

引用

页码：692 / 699

页数：8