Príspevok
R744 trans-critical turbo-compressor configurations @ -50℃
DOI: 10.18462/iir.compr.2024.0651
Sekcia: Rotary, scroll, screw, ... compressors I
Stav prijatia: Abstrakt prijatý
Autori
| Meno | Organizácia | |
|---|---|---|
| Stefanie Blust | NTNU | |
| Sven Foersterling, Dr. | TLK-Thermo | |
| Armin Hafner, Prof. | NTNU |
Abstrakt
A modular, trans-critical compression cycle is developed to keep the temperatures of the ATLAS and CMS detector upgrades of the Large Hadron Collider (LHC) at CERN below -40 °C under all conditions all year round. This results in an evaporation temperature of below -50 °C and cooling capacity of up to 550 kW. This primary refrigeration system consists of multiple, interconnected compressor slices, 9 slices in total. As an alternative, a turbo-compressor is used to convey R744 gas coming from the evaporator, which is located about 100 m underground, to the gas cooler on surface. It consists of two compressors slices.
In this paper, different turbo-compressor configurations are investigated as an alternative to the primary refrigeration cycle. Possibilities of an economizer, an ejector and a separator are analysed; and their COPs compared to find the most efficient system.
Kľúčové slová
Refrigeration, Carbon Dioxide, Turbo-compressor, Ultra-low refrigeration, Oil-free configuration, Numerical Analysis.