Experimental Study on R245fa Condensation Heat Transfer in Horizontal Smooth Tube and Enhanced Tube

Shengchun Liu; Ming Song; Baomin Dai; Yuan Tian; Mengjie Song; Ning Mao

doi:10.1016/j.egypro.2017.12.342

Experimental Study on R245fa Condensation Heat Transfer in Horizontal Smooth Tube and Enhanced Tube

Shengchun Liu^*, Ming Song, Baomin Dai, Yuan Tian, Mengjie Song, Ning Mao

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

Considerable attention has recently been given to R245fa for applications such as high temperature heat pump. In this paper, the condensation heat transfer characteristics of R245fa in a smooth tube and an internally enhanced tube are experimentally studied. The ranges of condensation temperature, mass flux and cooling water flux are 30~45°C, 84~197kg/m²·s and 732~1228kg/m²·s, respectively. The two tubes with a 4.58 mm inner diameter, 5mm outer diameter and 2000 mm length are used. The heat transfer coefficient in each case was analyzed carefully. The case study results show that condensation heat transfer coefficients increase with the increase of mass flux, but decrease with the condensation temperature. And the influence of cooling water flux on heat transfer coefficient is small. Compared the heat transfer coefficient between the smooth tube and the internally enhanced tube, Enhanced rates is 1.8 to 2.5.

Original language	English
Pages (from-to)	4169-4175
Number of pages	7
Journal	Energy Procedia
Volume	142
DOIs	https://doi.org/10.1016/j.egypro.2017.12.342
Publication status	Published - 2017
Externally published	Yes
Event	9th International Conference on Applied Energy, ICAE 2017 - Cardiff, United Kingdom Duration: 21 Aug 2017 → 24 Aug 2017

Keywords

condensation heat transfer characteristics
enhanced tube
heat transfer coefficient
smooth tube

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10.1016/j.egypro.2017.12.342

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title = "Experimental Study on R245fa Condensation Heat Transfer in Horizontal Smooth Tube and Enhanced Tube",

abstract = "Considerable attention has recently been given to R245fa for applications such as high temperature heat pump. In this paper, the condensation heat transfer characteristics of R245fa in a smooth tube and an internally enhanced tube are experimentally studied. The ranges of condensation temperature, mass flux and cooling water flux are 30~45°C, 84~197kg/m2·s and 732~1228kg/m2·s, respectively. The two tubes with a 4.58 mm inner diameter, 5mm outer diameter and 2000 mm length are used. The heat transfer coefficient in each case was analyzed carefully. The case study results show that condensation heat transfer coefficients increase with the increase of mass flux, but decrease with the condensation temperature. And the influence of cooling water flux on heat transfer coefficient is small. Compared the heat transfer coefficient between the smooth tube and the internally enhanced tube, Enhanced rates is 1.8 to 2.5.",

keywords = "condensation heat transfer characteristics, enhanced tube, heat transfer coefficient, smooth tube",

author = "Shengchun Liu and Ming Song and Baomin Dai and Yuan Tian and Mengjie Song and Ning Mao",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s).; 9th International Conference on Applied Energy, ICAE 2017 ; Conference date: 21-08-2017 Through 24-08-2017",

year = "2017",

doi = "10.1016/j.egypro.2017.12.342",

language = "English",

volume = "142",

pages = "4169--4175",

journal = "Energy Procedia",

issn = "1876-6102",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Experimental Study on R245fa Condensation Heat Transfer in Horizontal Smooth Tube and Enhanced Tube

AU - Liu, Shengchun

AU - Song, Ming

AU - Dai, Baomin

AU - Tian, Yuan

AU - Song, Mengjie

AU - Mao, Ning

PY - 2017

Y1 - 2017

N2 - Considerable attention has recently been given to R245fa for applications such as high temperature heat pump. In this paper, the condensation heat transfer characteristics of R245fa in a smooth tube and an internally enhanced tube are experimentally studied. The ranges of condensation temperature, mass flux and cooling water flux are 30~45°C, 84~197kg/m2·s and 732~1228kg/m2·s, respectively. The two tubes with a 4.58 mm inner diameter, 5mm outer diameter and 2000 mm length are used. The heat transfer coefficient in each case was analyzed carefully. The case study results show that condensation heat transfer coefficients increase with the increase of mass flux, but decrease with the condensation temperature. And the influence of cooling water flux on heat transfer coefficient is small. Compared the heat transfer coefficient between the smooth tube and the internally enhanced tube, Enhanced rates is 1.8 to 2.5.

AB - Considerable attention has recently been given to R245fa for applications such as high temperature heat pump. In this paper, the condensation heat transfer characteristics of R245fa in a smooth tube and an internally enhanced tube are experimentally studied. The ranges of condensation temperature, mass flux and cooling water flux are 30~45°C, 84~197kg/m2·s and 732~1228kg/m2·s, respectively. The two tubes with a 4.58 mm inner diameter, 5mm outer diameter and 2000 mm length are used. The heat transfer coefficient in each case was analyzed carefully. The case study results show that condensation heat transfer coefficients increase with the increase of mass flux, but decrease with the condensation temperature. And the influence of cooling water flux on heat transfer coefficient is small. Compared the heat transfer coefficient between the smooth tube and the internally enhanced tube, Enhanced rates is 1.8 to 2.5.

KW - condensation heat transfer characteristics

KW - enhanced tube

KW - heat transfer coefficient

KW - smooth tube

UR - http://www.scopus.com/inward/record.url?scp=85041540259&partnerID=8YFLogxK

U2 - 10.1016/j.egypro.2017.12.342

DO - 10.1016/j.egypro.2017.12.342

M3 - Conference article

AN - SCOPUS:85041540259

SN - 1876-6102

VL - 142

SP - 4169

EP - 4175

JO - Energy Procedia

JF - Energy Procedia

T2 - 9th International Conference on Applied Energy, ICAE 2017

Y2 - 21 August 2017 through 24 August 2017

ER -

Experimental Study on R245fa Condensation Heat Transfer in Horizontal Smooth Tube and Enhanced Tube

Abstract

Keywords

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