Príspevok
Prototype of eutectic refrigeration system working with R1270 refrigerant
DOI: 10.18462/iir.compr.2024.0604
Sekcia: Compressors and technologies
Stav prijatia: Príspevok prijatý
Autori
| Meno | Organizácia | |
|---|---|---|
| Lukas Prakopavičius, MEng | Kaunas University of Technology | |
| Liutauras Vaitkus, PhD | Kaunas University of Technology |
Abstrakt
The new European F-Gas and PFAS Directives further reduce availability of synthetic refrigerants. This article examines eutectic refrigerating systems used in weight-optimized low-temperature transport refrigerators for retail distribution. Such systems today use R452A with GWP=2140, and there are no suitable low GWP synthetic alternatives - transition to natural refrigerants could be the only option. This article examines a prototype eutectic refrigeration system with R1270. At the beginning the article briefly describes the working temperature regime of the eutectic refrigeration system, as well as the limiting factors. The early prototype was tested with R290 and R1270 refrigerants. The test results were considered when developing the second prototype. In order to further reduce refrigerant charge, thermal and hydraulic modelling of the evaporator (eutectic plates) was performed. At the end of the pull-down cycle, the evaporation pressure in the evaporator is in vacuum, therefore the control system has been developed to detect a possible leak on the low-pressure side. Test results of the second prototype are also presented.
Kľúčové slová
Eutectic refrigerating system
R1270 refrigerant test results
Refrigerant charge minimization.