TY - JOUR
T1 - Condensation heat transfer characteristics of R245fa in a shell and plate heat exchanger for high-temperature heat pumps
AU - Lim, Junyub
AU - Song, Kang Sub
AU - Kim, Dongwoo
AU - Lee, Dong Chan
AU - Kim, Yongchan
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/12
Y1 - 2018/12
N2 - In this study, the condensation heat transfer characteristics of R245fa in a shell and plate heat exchanger (SPHE) are measured and analyzed by varying the mean vapor quality from 0.16 to 0.86, mass flux from 16.0 to 45.0 kg m−2 s−1, heat flux from 1.3 to 9.0 kW m−2, and saturation temperature from 90 to 120 °C for high-temperature heat pumps (HTHPs). The condensation heat transfer coefficient and frictional pressure drop are shown to increase with increasing mean vapor quality and mass flux and with decreasing saturation temperature. The condensation heat transfer coefficient of R245fa in SPHE is on average 5.9% lower than that in the brazed plate heat exchanger (BPHE) with a similar effective heat transfer area. However, the average two-phase frictional pressure drop of R245fa in SPHE is 16.7% lower than that in BPHE. Empirical correlations for the condensation heat transfer coefficient and two-phase frictional pressure drop in SPHE are developed with mean absolute errors of 8.2% and 9.4%, respectively.
AB - In this study, the condensation heat transfer characteristics of R245fa in a shell and plate heat exchanger (SPHE) are measured and analyzed by varying the mean vapor quality from 0.16 to 0.86, mass flux from 16.0 to 45.0 kg m−2 s−1, heat flux from 1.3 to 9.0 kW m−2, and saturation temperature from 90 to 120 °C for high-temperature heat pumps (HTHPs). The condensation heat transfer coefficient and frictional pressure drop are shown to increase with increasing mean vapor quality and mass flux and with decreasing saturation temperature. The condensation heat transfer coefficient of R245fa in SPHE is on average 5.9% lower than that in the brazed plate heat exchanger (BPHE) with a similar effective heat transfer area. However, the average two-phase frictional pressure drop of R245fa in SPHE is 16.7% lower than that in BPHE. Empirical correlations for the condensation heat transfer coefficient and two-phase frictional pressure drop in SPHE are developed with mean absolute errors of 8.2% and 9.4%, respectively.
KW - Condensation heat transfer coefficient
KW - High-temperature heat pumps
KW - R245fa
KW - Shell and plate heat exchanger
KW - Two-phase frictional pressure drop
UR - http://www.scopus.com/inward/record.url?scp=85049797491&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2018.06.143
DO - 10.1016/j.ijheatmasstransfer.2018.06.143
M3 - Article
AN - SCOPUS:85049797491
SN - 0017-9310
VL - 127
SP - 730
EP - 739
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
ER -