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IIR document

Small water ejector chiller with on-off operated pump.

Number: 0617

Author(s) : MLYNÁR P., MASARYK M., ŠTRBA D., MALÍŠEK S., VILÁGI F.

Summary

The article presents a small steam ejector refrigeration machine using R718 (water) as the refrigerant and powered by a low temperature heat source of 90°C. The objective of this course is the design and troubleshooting of a liquid refrigerant pump. Because of the thermal and physical properties of water, all components of the machine, including the pump operate in a deep vacuum. The high latent heat of water has a significant effect on the required refrigerant flow, resulting in increased demands on the refrigerant pump. One of the critical and practical problems of such design is implementation of a suitable small liquid pump where contradictory parameters are required - small but stable liquid flow at deep under pressure, reliability, long service interval, problematic cooling of pump electric motor and reasonable price. One of the solutions can be using of a pump working in combination with a pressure tank. In this concept the running time of the pump is controlled by the water level in the tank. The working characteristics of this cooling circuit solution are discussed.

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Pages: 8

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Details

  • Original title: Small water ejector chiller with on-off operated pump.
  • Record ID : 30033311
  • Languages: English
  • Source: 11th IIR Conference on Compressors and Refrigerants.
  • Publication date: 2024/09
  • DOI: http://dx.doi.org/10.18462/iir.compr.2024.0617

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