Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 14th International Heat Transfer Conference |
| Subtitle of host publication | IHTC 14, August 8-13, 2010, Washington, DC, USA |
| Publisher | American Society of Mechanical Engineers(ASME) |
| Pages | 375-384 |
| Number of pages | 10 |
| ISBN (print) | 9780791849392 |
| Publication status | Published - 2010 |
| Externally published | Yes |
| Event | 2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC, United States Duration: 8 Aug 2010 → 13 Aug 2010 Conference number: 14 |
Abstract
Plate heat exchangers are already very effective and successful in liquid to liquid heat transfer. Nevertheless there is still room for improvement if more details about flow maldistribution and specifically about the coupling between flow interactions and heat transfer mechanisms on a local scale would be accessible. The relation between surface corrugation of the plates and thermal effectiveness is known, if at all, to the manufactors only. This contribution will report on an experimental study of local heat transfer within corrugated plate heat exchangers. The resolution of the experimental procedure is better than 0.5 x 0.5 mm. The measurements are performed using the Temperature Oscillation InfraRed Thermography (TOIRT) method, which can resolve a local heat transfer coefficient behind a surface with an uncertainty of less than 10 % if the flow is turbulent. The outer surface is periodically heated by means of sinodial laser radiation, the temperature response of the plate surface to this excitement is recorded by a lockin IR-camera. The phase shift between heat flux excitement and temperature response as seen by the IR camera is depending, among other parameters, on the heat transfer coefficient on the back side of the plate. This can be extracted using a numerical model based signal evaluation, thus enabling an intrusion free measurement. Plates with different corrugation angles and different flow fields have been analysed in detail. The result of this analysis gives rise to an understanding of the distribution of the local heat transfer coefficient as a function of topology of the plate and as a function of flow parameters. These results will be discussed on behalf of improvement potential for corrugated plates.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fluid Flow and Transfer Processes
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Proceedings of the 14th International Heat Transfer Conference: IHTC 14, August 8-13, 2010, Washington, DC, USA. American Society of Mechanical Engineers(ASME), 2010. p. 375-384.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Analysis of local heat transfer in plate heat exchangers for flow pattern optimisation
AU - Kabelac, Stephan
N1 - Conference code: 14
PY - 2010
Y1 - 2010
N2 - Plate heat exchangers are already very effective and successful in liquid to liquid heat transfer. Nevertheless there is still room for improvement if more details about flow maldistribution and specifically about the coupling between flow interactions and heat transfer mechanisms on a local scale would be accessible. The relation between surface corrugation of the plates and thermal effectiveness is known, if at all, to the manufactors only. This contribution will report on an experimental study of local heat transfer within corrugated plate heat exchangers. The resolution of the experimental procedure is better than 0.5 x 0.5 mm. The measurements are performed using the Temperature Oscillation InfraRed Thermography (TOIRT) method, which can resolve a local heat transfer coefficient behind a surface with an uncertainty of less than 10 % if the flow is turbulent. The outer surface is periodically heated by means of sinodial laser radiation, the temperature response of the plate surface to this excitement is recorded by a lockin IR-camera. The phase shift between heat flux excitement and temperature response as seen by the IR camera is depending, among other parameters, on the heat transfer coefficient on the back side of the plate. This can be extracted using a numerical model based signal evaluation, thus enabling an intrusion free measurement. Plates with different corrugation angles and different flow fields have been analysed in detail. The result of this analysis gives rise to an understanding of the distribution of the local heat transfer coefficient as a function of topology of the plate and as a function of flow parameters. These results will be discussed on behalf of improvement potential for corrugated plates.
AB - Plate heat exchangers are already very effective and successful in liquid to liquid heat transfer. Nevertheless there is still room for improvement if more details about flow maldistribution and specifically about the coupling between flow interactions and heat transfer mechanisms on a local scale would be accessible. The relation between surface corrugation of the plates and thermal effectiveness is known, if at all, to the manufactors only. This contribution will report on an experimental study of local heat transfer within corrugated plate heat exchangers. The resolution of the experimental procedure is better than 0.5 x 0.5 mm. The measurements are performed using the Temperature Oscillation InfraRed Thermography (TOIRT) method, which can resolve a local heat transfer coefficient behind a surface with an uncertainty of less than 10 % if the flow is turbulent. The outer surface is periodically heated by means of sinodial laser radiation, the temperature response of the plate surface to this excitement is recorded by a lockin IR-camera. The phase shift between heat flux excitement and temperature response as seen by the IR camera is depending, among other parameters, on the heat transfer coefficient on the back side of the plate. This can be extracted using a numerical model based signal evaluation, thus enabling an intrusion free measurement. Plates with different corrugation angles and different flow fields have been analysed in detail. The result of this analysis gives rise to an understanding of the distribution of the local heat transfer coefficient as a function of topology of the plate and as a function of flow parameters. These results will be discussed on behalf of improvement potential for corrugated plates.
UR - http://www.scopus.com/inward/record.url?scp=84860530524&partnerID=8YFLogxK
U2 - 10.1115/IHTC14-22387
DO - 10.1115/IHTC14-22387
M3 - Conference contribution
AN - SCOPUS:84860530524
SN - 9780791849392
SP - 375
EP - 384
BT - Proceedings of the 14th International Heat Transfer Conference
PB - American Society of Mechanical Engineers(ASME)
T2 - 2010 14th International Heat Transfer Conference, IHTC 14
Y2 - 8 August 2010 through 13 August 2010
ER -