Príspevok
Small water ejector chiller with on-off operated pump
DOI: 10.18462/iir.compr.2024.0617
Sekcia: Special compressors and components I
Stav prijatia: Abstrakt prijatý
Autori
| Meno | Organizácia | |
|---|---|---|
| Michal Masaryk, prof., Ing., PhD. | SjF STU Bratislava | |
| Peter Mlynár, doc., Ing., PhD. | SjF STU Bratislava | |
| Dominik Štrba, Ing., PhD. | SjF STU Bratislava | |
| František Világi, Ing., PhD. | SjF STU Bratislava | |
| Samuel Mališek, Ing. | SjF, STU Bratislava |
Abstrakt
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.
Kľúčové slová
Ejector cooling machine, refrigerant pump, R718, supersonic flow