TY - GEN
T1 - Theoretical analysis of the end-plate effect on heat transfer in brazed plate heat exchangers
AU - Li, Wenzhe
AU - Hrnjak, Pega
N1 - Funding Information:
The authors thankfully acknowledge the support provided by the Air Conditioning and Refrigeration Center at the Univ. of Illinois at Urbana-Champaign and CTS (Creative Thermal Solutions Inc.).
Publisher Copyright:
© 2019 International Institute of Refrigeration. All rights reserved.
PY - 2019
Y1 - 2019
N2 - In brazed plate heat exchangers (BPHEs), two end plates function as fins due to the heat conduction with the adjacent thermal plates. This effect brings difficulties in the development of reliable heat transfer correlations. This paper presents a theoretical analysis of the end-plate effect on heat transfer in BPHEs. In the analysis, the governing equation is obtained by the energy balance of an elementary cell of the end plate. Then, both numerical and analytical approaches are adopted to solve the governing equation. The results show that the numerical solution and analytical solution agree well with each other. The end-plate effect enlarges the active heat transfer area and leads to an overestimation of the heat transfer coefficient. An equation for the fin efficiency of the end plates is also proposed.
AB - In brazed plate heat exchangers (BPHEs), two end plates function as fins due to the heat conduction with the adjacent thermal plates. This effect brings difficulties in the development of reliable heat transfer correlations. This paper presents a theoretical analysis of the end-plate effect on heat transfer in BPHEs. In the analysis, the governing equation is obtained by the energy balance of an elementary cell of the end plate. Then, both numerical and analytical approaches are adopted to solve the governing equation. The results show that the numerical solution and analytical solution agree well with each other. The end-plate effect enlarges the active heat transfer area and leads to an overestimation of the heat transfer coefficient. An equation for the fin efficiency of the end plates is also proposed.
KW - Brazed Plate Heat Exchangers
KW - End-plate Effect
KW - Fin Efficiency
UR - http://www.scopus.com/inward/record.url?scp=85082707820&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85082707820&partnerID=8YFLogxK
U2 - 10.18462/iir.icr.2019.1565
DO - 10.18462/iir.icr.2019.1565
M3 - Conference contribution
AN - SCOPUS:85082707820
T3 - Refrigeration Science and Technology
SP - 2754
EP - 2761
BT - ICR 2019 - 25th IIR International Congress of Refrigeration
A2 - Minea, Vasile
PB - International Institute of Refrigeration
T2 - 25th IIR International Congress of Refrigeration, ICR 2019
Y2 - 24 August 2019 through 30 August 2019
ER -