TY - JOUR
T1 - High performance cooling of a HVDC converter using a fatty acid ester‐based phase change dispersion in a heat sink with double‐layer oblique‐crossed ribs
AU - Li, Qi
AU - Fischer, Ludger
AU - Qiao, Geng
AU - Mura, Ernesto
AU - Li, Chuan
AU - Ding, Yulong
PY - 2020/6/10
Y1 - 2020/6/10
N2 - The paper concerns with a high performance cooling method for a HVDC converter using fatty acid ester‐based phase change dispersion (PCD) in a heat sink with double‐layer oblique‐crossed ribs. Thermo‐physical properties of PCDs were first characterized under both solid and liquid states, and the cooling performance of the heat exchanger was then experimentally examined, by heating two copper blocks clamped closely to the aluminium heating surfaces. A three‐dimensional Euler‐Euler multiphase approach was further performed to evaluate the thermal performance under different operating conditions including heating power, flowrate and PCD concentration. The results showed that the viscosity of PCD can be a 100 times that of water, but the increased pumping power was only ~17.01% on average. The use of the PCD achieved a lower temperature of heat sink and fluid than that of water under the same set of conditions due to the latent heat of the PCM, thus enabling a safer and cooler environment for temperature‐sensitive HVDC components such as insulated gate bipolar transistors (IGBT). An optimal set of working conditions was proposed and a flowrate of 8 L/min under a heating power of 1.1 kW and a PCM concentration of 25% was recommended for industrial cooling operations.
AB - The paper concerns with a high performance cooling method for a HVDC converter using fatty acid ester‐based phase change dispersion (PCD) in a heat sink with double‐layer oblique‐crossed ribs. Thermo‐physical properties of PCDs were first characterized under both solid and liquid states, and the cooling performance of the heat exchanger was then experimentally examined, by heating two copper blocks clamped closely to the aluminium heating surfaces. A three‐dimensional Euler‐Euler multiphase approach was further performed to evaluate the thermal performance under different operating conditions including heating power, flowrate and PCD concentration. The results showed that the viscosity of PCD can be a 100 times that of water, but the increased pumping power was only ~17.01% on average. The use of the PCD achieved a lower temperature of heat sink and fluid than that of water under the same set of conditions due to the latent heat of the PCM, thus enabling a safer and cooler environment for temperature‐sensitive HVDC components such as insulated gate bipolar transistors (IGBT). An optimal set of working conditions was proposed and a flowrate of 8 L/min under a heating power of 1.1 kW and a PCM concentration of 25% was recommended for industrial cooling operations.
KW - Euler‐Euler multiphase modelling
KW - HVDC converter cooling
KW - fatty acid ester
KW - multi‐stream heat sink
KW - oblique‐crossed ribs
KW - phase change dispersion
UR - http://www.scopus.com/inward/record.url?scp=85082319773&partnerID=8YFLogxK
U2 - 10.1002/er.v44.7
DO - 10.1002/er.v44.7
M3 - Article
SN - 0363-907X
VL - 44
SP - 5819
EP - 5840
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 7
ER -