LÜ Jing, LI Chang, SHI Dongdong, et al. Simulate verification of CO2 microchannel evaporator pressure drop[J]. CIESC Journal, 2017, (5): 1866-1873. DOI: 10.11949/j.issn.0438-1157.20161165.
LÜ Jing, LI Chang, SHI Dongdong, et al. Simulate verification of CO2 microchannel evaporator pressure drop[J]. CIESC Journal, 2017, (5): 1866-1873. DOI: 10.11949/j.issn.0438-1157.20161165.DOI:
This research aims at analyzing the physical structure of CO2 microchannel evaporator and the fluidity of CO2 at two-phase segment and overheat segment. Based on the finite element analysis and the method of segmentation study
the researcher established the microchannel two-dimensional distribution model. The model simulation show that pressure drop mainly happens at the junction of header pipe and flat tube. Pressure drops more at overheat segment than at two-phase segment. Influence of evaporating pressure to the pressure drop of CO2 at flat tube is small. Boundary line between two-phase segment and overheat segment shifts right
when the CO2 flow rate increases and the pressure drop grows. Comparative analysis of simulation and experimental results show the error is within 10%
which verifies the reliability of the established model.