Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference |
| Untertitel | ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007 |
| Seiten | 469-477 |
| Seitenumfang | 9 |
| Publikationsstatus | Veröffentlicht - 2007 |
| Extern publiziert | Ja |
| Veranstaltung | ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference - Vancouver, BC, Kanada Dauer: 8 Juli 2007 → 12 Juli 2007 |
Abstract
Experimental results on quasi-local heat transfer coefficients for evaporation and condensation in PHEs related to vapor quality, mass flow rate and heat flux are presented in this paper. The data is obtained from a refrigeration cycle involving a PHE evaporator and a PHE condenser with a secondary fluid loop. The considered refrigerants are ammonia and R-134a. Evaporator and condenser are equipped with multiple thermocouples along the plates, which allow for the deduction of local heat flux and heat transfer coefficients on seven subsections of the plates. The data resolves for the first time the complete evaporation and condensation process along a plate channel and thus may contribute to the understanding of flow distribution and heat transfer mechanisms. The results show an increase of heat transfer coefficients with the vapor quality and the effects of mass flux and heat flux. The results conclude that parallel flow arrangement is advantageous for evaporation while counter flow enhances condensation heat transfer. Plates with low pitch angle chevron corrugations increase the evaporation. Comparisons with the limited available data from literature and various correlations indicate the need for further theoretical development. The data may be suitable for developing correlations of the thermo-hydraulic performance of plate evaporators and condensers as a function of flow, heat flux and plate parameters, which are not established in literature.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
- Ingenieurwesen (insg.)
- Maschinenbau
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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- Apa
- Vancouver
- BibTex
- RIS
Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference: ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. 2007. S. 469-477 HT2007-32051.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Local two-phase flow heat transfer in plate heat exchangers
AU - Kabelac, Stephan
AU - Freund, Sebastian W.
N1 - Copyright: Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - Experimental results on quasi-local heat transfer coefficients for evaporation and condensation in PHEs related to vapor quality, mass flow rate and heat flux are presented in this paper. The data is obtained from a refrigeration cycle involving a PHE evaporator and a PHE condenser with a secondary fluid loop. The considered refrigerants are ammonia and R-134a. Evaporator and condenser are equipped with multiple thermocouples along the plates, which allow for the deduction of local heat flux and heat transfer coefficients on seven subsections of the plates. The data resolves for the first time the complete evaporation and condensation process along a plate channel and thus may contribute to the understanding of flow distribution and heat transfer mechanisms. The results show an increase of heat transfer coefficients with the vapor quality and the effects of mass flux and heat flux. The results conclude that parallel flow arrangement is advantageous for evaporation while counter flow enhances condensation heat transfer. Plates with low pitch angle chevron corrugations increase the evaporation. Comparisons with the limited available data from literature and various correlations indicate the need for further theoretical development. The data may be suitable for developing correlations of the thermo-hydraulic performance of plate evaporators and condensers as a function of flow, heat flux and plate parameters, which are not established in literature.
AB - Experimental results on quasi-local heat transfer coefficients for evaporation and condensation in PHEs related to vapor quality, mass flow rate and heat flux are presented in this paper. The data is obtained from a refrigeration cycle involving a PHE evaporator and a PHE condenser with a secondary fluid loop. The considered refrigerants are ammonia and R-134a. Evaporator and condenser are equipped with multiple thermocouples along the plates, which allow for the deduction of local heat flux and heat transfer coefficients on seven subsections of the plates. The data resolves for the first time the complete evaporation and condensation process along a plate channel and thus may contribute to the understanding of flow distribution and heat transfer mechanisms. The results show an increase of heat transfer coefficients with the vapor quality and the effects of mass flux and heat flux. The results conclude that parallel flow arrangement is advantageous for evaporation while counter flow enhances condensation heat transfer. Plates with low pitch angle chevron corrugations increase the evaporation. Comparisons with the limited available data from literature and various correlations indicate the need for further theoretical development. The data may be suitable for developing correlations of the thermo-hydraulic performance of plate evaporators and condensers as a function of flow, heat flux and plate parameters, which are not established in literature.
UR - http://www.scopus.com/inward/record.url?scp=43449084643&partnerID=8YFLogxK
U2 - 10.1115/HT2007-32051
DO - 10.1115/HT2007-32051
M3 - Conference contribution
AN - SCOPUS:43449084643
SN - 0791842746
SN - 9780791842744
SP - 469
EP - 477
BT - Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
T2 - 2007 ASME/JSME Thermal Engineering Summer Heat Transfer Conference, HT 2007
Y2 - 8 July 2007 through 12 July 2007
ER -