Experimental study and simulation of the rectifier nozzle-type critical distributor applied to the application of row tube plate instant freezer

IF 6.1 2区工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2024-11-15 DOI:10.1016/j.applthermaleng.2024.124939

Zhili Sun, Wenfu Zhang, Jiao Feng, Hou Sicong, Liang Di

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Abstract

To solve the problem of performance reduction caused by uneven two-phase refrigerant distribution in refrigeration system, two types of distributors were applied to the experimental bench of row tube plate instant freezer with adjustable liquid supply mode. The parameters of cooling rate, refrigerating capacity, COP, and outlet superheat of the row tube plate instant freezer with the application of the two different types of distributors were analyzed. The study shows that the cooling rate of Rectifier Nozzle-Type Critical Distributor is 13.7 % faster than that of the traditional quick-freezer under the condition of downward inlet and upward outlet liquid supply mode, and the cooling rate of Liquid Storage Distributor is 10 % faster than that of the traditional quick-freezer under the condition of upward inlet and downward outlet liquid supply mode. Under the condition of evaporating temperature −31 °C ∼ -35 °C. the refrigeration capacity, COP, and superheat inhomogeneity of the Rectifier Nozzle-Type Critical Distributor system is better performance in general. Simulation is carried out in combination with experimental conditions, and The simulation results show that the formation of annular flow and critical sound velocity in the Rectifier Nozzle-Type Critical Distributor has excellent distribution ability. A new idea for solving the problem of refrigeration inefficiency is presented in this study.

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整流喷嘴式临界分配器在行管板式速冻机应用中的实验研究与仿真

为了解决制冷系统中两相制冷剂分布不均匀导致性能下降的问题，在具有可调供液模式的排管式板式速冻机实验台上应用了两种类型的分配器。分析了采用两种不同类型分配器的列管板式速冻机的制冷速率、制冷量、COP 和出口过热度等参数。研究表明，在向下入口和向上出口供液模式条件下，整流喷嘴型临界分配器的制冷速率比传统速冻器快 13.7%；在向上入口和向下出口供液模式条件下，储液分配器的制冷速率比传统速冻器快 10%。在蒸发温度-31 °C∼-35°C的条件下，整流喷嘴型临界分配器系统的制冷量、COP和过热度不均匀性总体表现较好。结合实验条件进行了仿真，仿真结果表明，整流喷嘴-临界分配器中形成的环形流和临界声速具有良好的分配能力。本研究提出了解决制冷效率低下问题的新思路。

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.