Flow boiling of R134a and ammonia in a plate heat exchanger
Само за регистроване кориснике
2008
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
This paper presents experimental results on evaporation heat transfer for flow boiling of ammonia and of R134a in a chevron-pattern corrugated plate heat exchanger (PHE). The measurements enable the evaluation of a quasi-local heat transfer coefficient along the plate, which in turn allows discussing the two-phase distribution and the heat transfer mechanism during evaporation in a plate channel. The saturation temperature varied between 268 K < TNH 3s < 283 K (3.55 bar < pRs < 5.73 bar) for ammonia and 265 K < TR 134 as < 283 K (2.157 bar < pRs < 4.14 bar) for R134a. The heat transfer coefficient is discussed in relation to the vapor quality, mass flux, heat flux and the type of refrigerant. The secondary fluid is a water/ethylene glycol mixture flowing in counter flow or parallel flow arrangement within the PHE. It is shown that the parallel flow case yields better overall performance than the counterflow case, and that plates with low chevron angle corrugations increase the evaporat...ion heat transfer. Comparison with the limited data available from the literature shows good agreement. The Danilova equation and the Steiner boiling correlation are adapted to PHEs and show the need for further theoretical development.
Кључне речи:
Ammonia / Evaporation / Heat transfer coefficient / Plate heat exchanger / R134aИзвор:
International Journal of Heat and Mass Transfer, 2008, 51, 25-26, 6235-6242Издавач:
- Elsevier Ltd
DOI: 10.1016/j.ijheatmasstransfer.2008.01.042
ISSN: 0017-9310
WoS: 000261628800050
Scopus: 2-s2.0-55649111358
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Đorđević, E. AU - Kabelac, S. PY - 2008 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5551 AB - This paper presents experimental results on evaporation heat transfer for flow boiling of ammonia and of R134a in a chevron-pattern corrugated plate heat exchanger (PHE). The measurements enable the evaluation of a quasi-local heat transfer coefficient along the plate, which in turn allows discussing the two-phase distribution and the heat transfer mechanism during evaporation in a plate channel. The saturation temperature varied between 268 K < TNH 3s < 283 K (3.55 bar < pRs < 5.73 bar) for ammonia and 265 K < TR 134 as < 283 K (2.157 bar < pRs < 4.14 bar) for R134a. The heat transfer coefficient is discussed in relation to the vapor quality, mass flux, heat flux and the type of refrigerant. The secondary fluid is a water/ethylene glycol mixture flowing in counter flow or parallel flow arrangement within the PHE. It is shown that the parallel flow case yields better overall performance than the counterflow case, and that plates with low chevron angle corrugations increase the evaporation heat transfer. Comparison with the limited data available from the literature shows good agreement. The Danilova equation and the Steiner boiling correlation are adapted to PHEs and show the need for further theoretical development. PB - Elsevier Ltd T2 - International Journal of Heat and Mass Transfer T1 - Flow boiling of R134a and ammonia in a plate heat exchanger EP - 6242 IS - 25-26 SP - 6235 VL - 51 DO - 10.1016/j.ijheatmasstransfer.2008.01.042 ER -
@article{ author = "Đorđević, E. and Kabelac, S.", year = "2008", abstract = "This paper presents experimental results on evaporation heat transfer for flow boiling of ammonia and of R134a in a chevron-pattern corrugated plate heat exchanger (PHE). The measurements enable the evaluation of a quasi-local heat transfer coefficient along the plate, which in turn allows discussing the two-phase distribution and the heat transfer mechanism during evaporation in a plate channel. The saturation temperature varied between 268 K < TNH 3s < 283 K (3.55 bar < pRs < 5.73 bar) for ammonia and 265 K < TR 134 as < 283 K (2.157 bar < pRs < 4.14 bar) for R134a. The heat transfer coefficient is discussed in relation to the vapor quality, mass flux, heat flux and the type of refrigerant. The secondary fluid is a water/ethylene glycol mixture flowing in counter flow or parallel flow arrangement within the PHE. It is shown that the parallel flow case yields better overall performance than the counterflow case, and that plates with low chevron angle corrugations increase the evaporation heat transfer. Comparison with the limited data available from the literature shows good agreement. The Danilova equation and the Steiner boiling correlation are adapted to PHEs and show the need for further theoretical development.", publisher = "Elsevier Ltd", journal = "International Journal of Heat and Mass Transfer", title = "Flow boiling of R134a and ammonia in a plate heat exchanger", pages = "6242-6235", number = "25-26", volume = "51", doi = "10.1016/j.ijheatmasstransfer.2008.01.042" }
Đorđević, E.,& Kabelac, S.. (2008). Flow boiling of R134a and ammonia in a plate heat exchanger. in International Journal of Heat and Mass Transfer Elsevier Ltd., 51(25-26), 6235-6242. https://doi.org/10.1016/j.ijheatmasstransfer.2008.01.042
Đorđević E, Kabelac S. Flow boiling of R134a and ammonia in a plate heat exchanger. in International Journal of Heat and Mass Transfer. 2008;51(25-26):6235-6242. doi:10.1016/j.ijheatmasstransfer.2008.01.042 .
Đorđević, E., Kabelac, S., "Flow boiling of R134a and ammonia in a plate heat exchanger" in International Journal of Heat and Mass Transfer, 51, no. 25-26 (2008):6235-6242, https://doi.org/10.1016/j.ijheatmasstransfer.2008.01.042 . .