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http://dx.doi.org/10.12925/jkocs.2019.36.4.1410

Simulation to identify the frost formation of the heat pump outdoor unit  

Kim, Jong-Ryeol (Department of Refrigeration & Air Conditioning Engineering)
Publication Information
Journal of the Korean Applied Science and Technology / v.36, no.4, 2019 , pp. 1410-1419 More about this Journal
Abstract
In this research, it is to find a method that frost does not form on the outdoor unit to develop a heat pump capable of heating in cold regions. For this reason, we produced an incubator capable of creating an environment of -25℃, and constructed an experimental apparatus so that experiments in the room were possible. However, it is necessary to grasp the characteristics of the air reaching the front of the heat pump outdoor unit installed in the experimental apparatus, and flow analysis was performed using ANSYS CFX, which is general-purpose software. As a result, the flow velocity of the air reaching the front of the outdoor unit in the outdoor unit chamber in the entire region of the simulation conditions (5.0 to 7.5 m/s) has many differences in the upper and lower portions, resulting in a natural state. It turned out that the condition can not be satisfied. Therefore, it is determined that it is necessary to additionally install a frequency divider at the front of the outdoor unit to make the flow velocity constant.
Keywords
Defrost; Frost; Heat pump; outdoor machine; Cold district;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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