- 研究番号：22C05
- 研究分野：environment
- 研究種別：奨励研究
- 研究期間：2022年04月〜2023年03月
代表研究者
キム ムジュン 理工総研が募集する次席研究員
KIM Moojoong Junior Researcher
理工学術院総合研究所 齋藤 潔 研究室
Waseda Research Institute for Science and Engineering
URL：https://w-rdb.waseda.jp/html/100002207_ja.html
研究概要
Due to multiple branching microchannel tubes connected to a single header, non-uniform distribution occurs within the branching parallel flat tubes. This is referred to as the flow mal distribution. A consequence of this phenomenon is a poor heat transfer rate resulting from the dry-outs on some tube channels during evaporation or excessive liquid loading during condensation. The maldistribution is one of the interesting topics for the microchannel heat exchanger(MCHX). In this study, the homogeneous mixer is considered to achieve the uniform distribution for the vertical header, and its effects are investigated.
The research plan for the purpose is as below:
1. Design the homogenous mixer for the two-phase refrigerant using CFD analysis which for make well mixed two-phase flow; Ansys Fluent, COMSOL
2. The experimental bench is built up for the single tube experiment for evaluation of the mixing effect of the homogeneous mixer
3. The single-tube experiment of the homogeneous mixer is performed under R410A refrigerant
4. Semi-empirical based correlation of mixing effect for the homogenous mixer are developed for the distribution evaluation of vertical header
Prospects:
The developed homogenous mixer can be simply applied to the present actual vertical header for the microchannel heat exchanger. The mixing effect can address the maldistribution of the vertical header and can improve the heat transfer performance and the air-conditioning systems.
