A comparative study of flow characteristics of adiabatic spiral and helical capillary tube in a CO2 transcritical system

被引：1

作者：

Jadhav, Pravin ^{[1
]}

Agrawal, Neeraj ^{[1
]}

机构：

[1] Dr BA Technol Univ Lonere, Dept Mech Engn, Lonere, India

来源：

INTERNATIONAL JOURNAL OF AMBIENT ENERGY | 2021年 / 43卷 / 01期

关键词：

Capillary tube; transcritical; helical capillary tube; spiral capillary tube;

D O I：

10.1080/01430750.2021.1913645

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Flow characteristics of an adiabatic spiral and a helical capillary tube in a CO2 transcritical system are numerically simulated. A homogeneous two-phase flow model is developed using the mass, energy and momentum conservation equations, taking into consideration the helical and spiral coiling effects of the capillary tubes. Friction factor and viscosity correlations are used from the available literature. Results are compared with conventional subcritical refrigerant R22. Reduction in a mass flow rate of refrigerant is more pronounced in the spiral capillary tube than helical capillary tube effect; about 18% and 11% with CO2 and R22, respectively. Length requirement with a spiral capillary tube is relatively less compared to other chosen configurations for the given mass flow rate and operating conditions.

引用

页码：4594 / 4601

页数：8

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