空调用孔板式集管分配器分流特性及结构优化
Distribution characteristics and structure optimization of orifice-plate-type header distributor of heat exchangers in air conditioners
郭文华 1胡凯恒 1赵日晶 1黄东1
作者信息
- 1. 西安交通大学制冷与低温工程系,西安 710049
- 折叠
摘要
针对空调换热器中集管型分配器的流量分配不均问题,提出了新型孔板式集管分配器.通过在传统竖直集管分配器基础上嵌入孔板结构,促进气液相混合并调控动量,从而提高分流均匀性.新型分配器需明确孔板对两相制冷剂分流特性的影响,数值模拟研究了内嵌入口孔板和中置孔板时竖直集管内气液流动分配,发现入口孔板有混合和加速作用,中置孔板有挡液和加速作用.据此优化设计两种分配器结构,且通过实验测试其分流性能.结果表明入口孔板和中置孔板式分配器都实现了分流均匀性提升,其分流不均匀度较传统分配器分别平均降低 19.3％和 34.5％.
Abstract
To solve the problem of flow maldistribution in the header-type distributor of heat exchangers in air condition-ers,the novel orifice-plate-type header distributor was proposed in this study.By embedding the orifice plate structure in the traditional vertical header distributor,the gas-liquid phase mixing was promoted and the momentum was regulated,thereby im-proving the distribution uniformity.It is necessary to clarify the influence of the orifice plate on the two-phase distribution char-acteristics.Refrigerant flow distribution in vertical header embedded with inlet and middle orifice plates was numerically studied,which reveals that the inlet orifice plate has the mixing and accelerating effect,and the middle orifice plate has a liquid-bloc-king and accelerating effect.Accordingly,two distributor structures were optimized,and their distribution performance was ex-perimentally tested.Results show that the inlet-orifice-plate and middle-orifice-plate header distributor improve the distri-bution uniformity,and the unevenness is reduced by 19.3％and 34.5％on average compared with the traditional distributor.
关键词
空调/分配器/孔板/分流/结构优化Key words
Air conditioner/Distributor/Orifice plate/Flow distribution/Structure optimization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据