ShareExperimental investigation of liquid slugging in reciprocating compressors.
Number: 1332
Author(s) : BALCONI T. B., RODRIGUES T. T., DESCHAMPS C. J.
Summary
Liquid slugging is a phenomenon in which liquid refrigerant enters the compression chamber, posing a significant risk to reciprocating compressors by potentially damaging valves and other components, often leading to failure. Reciprocating compressors adopt suction mufflers to attenuate noise resulting from pressure pulsation brought about by piston. However, the impact of the suction muffler design on liquid refrigerant volume during slugging remains unclear due to intricate fluid dynamics. This paper reports an experimental investigation of the two-phase flow of refrigerant in a simplified suction muffler geometry. The aim is to explore how operating conditions influence the volume of liquid refrigerant reaching the compression chamber after a liquid slugging event. A test bench, comprising a calorimeter, liquid injection system, and test section, was developed was designed to measure the volume of R-134a in its liquid phase at the muffler outlet following a predefined mass injection. The calorimeter was used to submit the muffler to different operating conditions. The injection system included a reservoir of refrigerant in liquid form under controlled pressure, supply line, and a solenoid valve for controlled test section injections. The test section, featuring a sight glass and a transparent acrylic muffler, was integrated into the calorimeter circuit to replicate hermetic compressor operating conditions. A high-speed camera facilitated the observation of flow through the muffler. Results indicate that liquid slugging is highly complex, with the volume of liquid refrigerant reaching the muffler outlet increasing with the injection pressure.
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- Original title: Experimental investigation of liquid slugging in reciprocating compressors.
- Record ID : 30033602
- Languages: English
- Subject: General information
- Source: 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
- Publication date: 2024/07/18
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Indexing
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Themes:
Two-phase flow;
Compressors - Keywords: Liquid; Refrigerant; Two-phase flow; R134a; Test rig; Case study; Reciprocating compressor
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