The effect of geometry parameters on the heat transfer performance of supercritical CO2 in horizontal helically coiled tube under the cooling condition

被引：20

作者：

Liu, Xinxin ^{[1
]}

Xu, Xiaoxiao ^{[1
]}

Liu, Chao ^{[1
]}

He, Jiacheng ^{[2
]}

Dang, Chaobin ^{[2
]}

机构：

[1] Chongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Coll Power Engn, 174 Shazhengjie, Chongqing 400044, Peoples R China

[2] Univ Tokyo, Dept Human & Engn Environm Studies, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778563, Japan

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2019年 / 106卷

基金：

中国国家自然科学基金;

关键词：

Supercritical CO2; Experimental study; Helically coiled tube; Centrifugal force; Buoyancy force; PRESSURE-DROP CHARACTERISTICS; CARBON-DIOXIDE; FLOW ACCELERATION; BUOYANCY FORCE; PART; WATER; FLUID; PIPE;

D O I：

10.1016/j.ijrefrig.2019.02.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experimentally and numerically studied the heat transfer performance of supercritical CO2 (S -CO2) cooled in small (d <= 4 mm) horizontal helically coiled tube (HCT). Five HCTs with fixed coil pitch b = 34 mm, coil diameters D ranging from 36-140 mm and tube diameters d ranging from 2 to 4 mm were used. The results showed that the heat transfer coefficient (HTC) has tripled as the tube diameter decreases from 4 to 2 mm. HTC increases up to 30% with the coil diameter decreasing from 140 to 36 mm. Based on the modified theory derived from the straight tube (ST) with upward flow, the onset value of buoyancy effect in horizontal HCT was obtained, which confirmed that the buoyancy in the present experimental study can be neglected. Totally, 33 test runs and 426 points were performed, and from which a new correlation was proposed to evaluate the HTC of S-CO2 in the horizontal HCT under cooling condition. (C) 2019 Elsevier Ltd and IIR. All rights reserved.

引用

页码：650 / 661

页数：12

共 51 条

[1]

[Anonymous], 1930, HEAT TRANSFER AUTOMO

[2] Experimental investigation of heat transfer of supercritical carbon dioxide flowing in a cooled vertical tube [J].

Bruch, A. ;

Bontemps, A. ;

Colasson, S. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2009, 52 (11-12) :2589-2598

[3] Supercritical CO2 as heat transfer fluid: A review [J].

Cabeza, Luisa F. ;

de Gracia, Alvaro ;

Ines Fernandez, A. ;

Farid, Mohammed M. .

APPLIED THERMAL ENGINEERING, 2017, 125 :799-810

[4] On the influence of gravitational and centrifugal buoyancy on laminar flow and heat transfer in curved pipes and coils [J].

Ciofalo, Michele ;

Arini, Antonino ;

Di Liberto, Massimiliano .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2015, 82 :123-134

[5] In-tube cooling heat transfer of supercritical carbon dioxide. Part 1. Experimental measurement [J].

Dang, C ;

Hihara, E .

INTERNATIONAL JOURNAL OF REFRIGERATION, 2004, 27 (07) :736-747

[6] In-tube cooling heat transfer of supercritical carbon dioxide. Part 2. Comparison of numerical calculation with different turbulence models [J].

Dang, CB ;

Hihara, E .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2004, 27 (07) :748-760

[7] Numerical investigation of cooling heat transfer to supercritical CO2 in a horizontal circular tube [J].

Du, Zhongxuan ;

Lin, Wensheng ;

Gu, Anzhong .

JOURNAL OF SUPERCRITICAL FLUIDS, 2010, 55 (01) :116-121

[8] A comprehensive review on heat transfer and pressure drop characteristics and correlations with supercritical CO2 under heating and cooling applications [J].

Ehsan, M. Monjurul ;

Guan, Zhiqiang ;

Klimenko, A. Y. .

RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2018, 92 :658-675

[9] Water-coupled carbon dioxide microchannel gas cooler for heat pump water heaters: Part I - Experiments [J].

Fronk, Brian M. ;

Garimella, Srinivas .

INTERNATIONAL JOURNAL OF REFRIGERATION, 2011, 34 (01) :7-16

[10]

GNIELINSKI V, 1976, INT CHEM ENG, V16, P359

← 1 2 3 4 5 6 →