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Your search keyword '"Li, Huize"' showing total 2 results
Start Over Author "Li, Huize" Topic infrared thermography
2 results on '"Li, Huize"'

1. Quantification of Liquid Refrigerant Distribution in Parallel Flow Microchannel Heat Exchanger Using Infrared Thermography

Author

Li, Huize and Hrnjak, Predrag S.

Subjects
Microchannel heat exchanger, refrigerant distribution, infrared thermography
Abstract

This paper presents a method to quantify the distribution of liquid refrigerant mass flow rate in parallel flow microchannel heat exchanger from the infrared images. This method can be used for several types of heat exchangers: evaporators, condensers, gas-coolers and etc., also it can be applied to various heat exchanger designs: different inlet/outlet locations, different flow configurations and etc. After being implemented in a heat exchanger model, this method is validated against experimental data, and it is used to examine the validity of quality distribution function in operating heat exchangers. Also, heat exchanger model equipped with this method provides quantitative information of capacity degradation due to refrigerant maldistribution.

Published
2014

2. An experimentally validated model for microchannel heat exchanger incorporating lubricant effect.

Author

Li, Huize and Hrnjak, Pega

Subjects
*MICROCHANNEL flow, *HEAT exchangers, *LUBRICATION & lubricants, *MIXTURES, *HEAT transfer coefficient
Abstract

This paper presents the further development of Li and Hrnjak's (2013) microchannel heat exchanger model which includes the thermodynamic and transport properties of refrigerant–oil mixture. Effect of lubricant is accounted in boiling heat transfer, pressure drop and refrigerant distribution. A newly proposed infrared thermography based method is implemented in the model to describe the liquid refrigerant distribution in the inlet header of the microchannel heat exchanger. The new model is validated against experimental results (R134a-PAG 46 oil) at various oil circulation ratios (0.1%–8.3%). Simulation results also indicate that lubricant addition improves refrigerant distribution which is in agreement with experiments and the infrared thermography based method enables the model capture lubricant effect on capacity more comprehensively. [ABSTRACT FROM AUTHOR]

Published
2015
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