Details
| Titel in Übersetzung | Ebullition en éncoulement d'ammoniac dans un tube lisse ou un tube ailetté |
|---|---|
| Originalsprache | Englisch |
| Seiten (von - bis) | 41-50 |
| Seitenumfang | 10 |
| Fachzeitschrift | International Journal of Refrigeration |
| Jahrgang | 24 |
| Ausgabenummer | 1 |
| Frühes Online-Datum | 30 Nov. 2000 |
| Publikationsstatus | Veröffentlicht - Jan. 2001 |
Abstract
Experimental data of the local heat transfer coefficient of flow boiling ammonia in dependence of vapor fraction, mass flux and local heat flux is presented. Two horizontal test sections of 450 mm length and an inner diameter of 10 mm have been used, one being a plain tube, one being a spirally low finned tube. A constant wall temperature boundary has been aimed for the test section by heating with a fluid condensing on the tube outside. Local heat transfer coefficients and pressure drops have been measured in the range -40<Tsat<4 °C, 0<x<0.9, 50<m<150 kg/m2s and 2<ΔTw<15 K with resulting heat fluxes of 17<q<75 kW/m2. The vapor quality is denoted as x, m is the mass flux and ΔTw the wall superheat. The measured data is carefully evaluated using a finite element model of the tube with regard to the circumferential heat flow distribution. The smooth tube results are compared with recently published data and the correlation from Zuercher, and with the correlations of Steiner and Kattan. The results of the low finned tube are not matched by any known correlation.
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in: International Journal of Refrigeration, Jahrgang 24, Nr. 1, 01.2001, S. 41-50.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Flow boiling of ammonia in a plain and a low finned horizontal tube
AU - Kabelac, S.
AU - de Buhr, H.-J.
N1 - Funding Information: Financial support of the Arbeitsgemeinschaft industrieller Forschungsvereinigungen (AiF) (German work group on industrial research) and the Forschungsrat Kältetechnik (FKT) (German refrigeration research association) is gratefully acknowledged. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2001/1
Y1 - 2001/1
N2 - Experimental data of the local heat transfer coefficient of flow boiling ammonia in dependence of vapor fraction, mass flux and local heat flux is presented. Two horizontal test sections of 450 mm length and an inner diameter of 10 mm have been used, one being a plain tube, one being a spirally low finned tube. A constant wall temperature boundary has been aimed for the test section by heating with a fluid condensing on the tube outside. Local heat transfer coefficients and pressure drops have been measured in the range -40<Tsat<4 °C, 02s and 2<ΔTw<15 K with resulting heat fluxes of 172. The vapor quality is denoted as x, m is the mass flux and ΔTw the wall superheat. The measured data is carefully evaluated using a finite element model of the tube with regard to the circumferential heat flow distribution. The smooth tube results are compared with recently published data and the correlation from Zuercher, and with the correlations of Steiner and Kattan. The results of the low finned tube are not matched by any known correlation.
AB - Experimental data of the local heat transfer coefficient of flow boiling ammonia in dependence of vapor fraction, mass flux and local heat flux is presented. Two horizontal test sections of 450 mm length and an inner diameter of 10 mm have been used, one being a plain tube, one being a spirally low finned tube. A constant wall temperature boundary has been aimed for the test section by heating with a fluid condensing on the tube outside. Local heat transfer coefficients and pressure drops have been measured in the range -40<Tsat<4 °C, 02s and 2<ΔTw<15 K with resulting heat fluxes of 172. The vapor quality is denoted as x, m is the mass flux and ΔTw the wall superheat. The measured data is carefully evaluated using a finite element model of the tube with regard to the circumferential heat flow distribution. The smooth tube results are compared with recently published data and the correlation from Zuercher, and with the correlations of Steiner and Kattan. The results of the low finned tube are not matched by any known correlation.
UR - http://www.scopus.com/inward/record.url?scp=0035152127&partnerID=8YFLogxK
U2 - 10.1016/S0140-7007(00)00066-9
DO - 10.1016/S0140-7007(00)00066-9
M3 - Article
AN - SCOPUS:0035152127
VL - 24
SP - 41
EP - 50
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
SN - 0140-7007
IS - 1
ER -