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Experimental and numerical study on scroll compressor under different profile correction and discharge ports shapes.

Author(s) : LI K., LI C., MOHTARAM S., LIU N., ZHANG H., DOU B., HE Q., HASAN M. A., ISLAM S., WANG J., WANG Z., CHEN J., ARYANFAR Y.

Type of article: IJR article

Summary

The scroll compressor is an essential component in air conditioning and heat pump systems. This study examined an electric scroll compressor using R22 refrigerant, focusing on how modifications in the scroll head profile and discharge structure affect its performance. Initially, a semi-empirical model based on mathematical formulas was developed to predict the performance improvements of the updated scroll compressor. Three-dimensional simulation software was then used to illustrate changes in the internal flow dynamics before and after enhancements. The predictions were validated through experimental testing. Both the semi-empirical model and the three-dimensional unsteady numerical calculation model analyzed the effects of modifications to the tooth head profile and discharge port shape on compressor performance. The adoption of a PMP profile correction delayed the compressor discharge process, shifting the starting discharge angle from 315°to 344°, thereby reducing under-compression occurrences during operation and increasing volumetric efficiency by 1.31%. Additionally, mathematical formulas correlating temperature with compressor performance were developed from fitting data, predicting compressor behavior under various conditions. Moreover, replacing a circular discharge port with a waist-shaped port reduced power consumption by 0.59 kW, resulting in a more uniform temperature distribution and enhanced mass flow rate during compressor operation.

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Pages: 241-253

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Details

  • Original title: Experimental and numerical study on scroll compressor under different profile correction and discharge ports shapes.
  • Record ID : 30033224
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 169
  • Publication date: 2025/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2024.10.007

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