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Dynamic reed valve in rolling piston compressor: a 3-dimensional transient CFD simulation.

Number: 1504

Author(s) : CHAUDHARI N., MOHAPATRA C. K., DING H., GAO H.

Summary

This study focuses on a 3-D transient Computational Fluid Dynamics (CFD) model for a rolling piston compressor with a dynamic reed valve, a crucial element in refrigeration and air-conditioning systems known for its energy-intensive operation. The growing popularity of rolling piston compressors stems from their favorable characteristics, including silent and smooth operation, as well as high reliability and efficiency. Efficient CFD modeling of such compressors necessitates a thorough understanding of the flow dynamics within the suction chamber, compression chamber, and the thin leakage volume. This modeling must be coupled with considerations for the rotating piston and the dynamic behavior of the reed valve, which plays a pivotal role in discharging compressed fluid at prescribed pressures. Analyzing the discharge valve system is crucial for addressing over-compression loss and reliability issues.
The presented work employs a detailed 3D transient CFD model, utilizing the Simerics-MP+ internal rolling piston template to generate a mesh for the entire system. The template incorporates a rotational dynamics module to accurately capture the movement and deformation of the mesh. Additionally, a rotational ordinary differential equation, based on cantilever beam theory, is formulated to account for the bending motion of the valve reed near the discharge port. A test simulation of a generic rolling compressor, incorporating a discharger reed valve, demonstrates the robustness, speed, and user-friendly nature of the algorithms and implementations. The findings suggest the potential applicability of these methods to rolling piston compressor systems, effectively capturing various physical phenomena.

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  • Original title: Dynamic reed valve in rolling piston compressor: a 3-dimensional transient CFD simulation.
  • Record ID : 30033626
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Publication date: 2024/07/18

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