The Integrated 2-Phase Accumulator Controlled Loop (2PACL) is a modification of the existing 2PACL system developed for the AMS-Tracker and LHCb-VELO CO2 cooling systems. The integrated 2PACL method is a different way of operating and control the original 2PACL concept.

图派克·夏库尔（Tupac Amaru Shakur，1971年6月16日–1996年9月13日），艺名为“2Pac”，出生于美国纽约曼哈顿，美国说唱歌手、词曲作者、演员、诗人。 1991年，发行首张录音室专辑《2Pacalypse Now》并因此获得关注 [2]。 1993年，发行第二张录音室专辑《Strictly 4 My N.I.G.G.A.Z...》 [2]。 1995年，发行第三张录音室专辑《Me Against the World》 [2]。 1996年，发行第四张录音室专辑《All Eyez on Me》，该专辑被 美国唱片工业协会 认证为“ 钻石唱片 ” …

2024年4月24日 · The selected secondary ¿on-detector¿ CO₂ pumped loop concept is the evolution of the successful 2PACL technique allowing for oil-free, stable, low-temperature control. The new systems are of unprecedented scale and largely more complex for both mechanics and controls than installations of today.

In the scope of the High Luminosity program of the Large Hadron Collider at CERN, the ATLAS and CMS ex-periments are advancing the preparation for the production, commissioning and installation of their new environment-friendly low-temperature detector cooling systems for their new trackers, calorimeters and timing layers.

The 2PACL cooling systems at CERN. This is a bit of a long-winded ramble about our cooling systems. The cooling principle that guides these systems is called the Two-Phase Accumulator Controlled Loop (or 2PACL, no relation to Shakur) and it is a very innovative piece of technology. What does CERN do?

2PACL which stands for 2-Phase Accumulator Controlled Loop [5], as the accumulator control is the only major actively controlled item in the system. The 2PACL method is the default solution used nowadays for all CO 2 cooling systems in particle physics experiments. 2.2 …

The 2PACL system make use of evaporative CO 2 cooling – whereby the change in phase from liquid to gaseous CO 2 results in a cooling effect. A 2PACL cooling plant contains a vessel (called the accumulator), a liquid pump, condensers (heat exchangers), and a chiller. The accumulator stores a liquid/vapour mixture of CO 2

The installation phase of the 2PACL cooling plants and related equipment is expected to continue through 2025, followed by an extensive commissioning campaign to dial in the new infrastructure. The distribution pipework will then be connected to the future detectors during Long-Shutdown 3, ready for action during the Hi-Lumi LHC era! ...

•Evaluating overlap of 2PACL commissioning phase with primary delivery •Preliminary plans for detector surface testing infrastructure (DEMO Inheritance) •First footprint estimate and space allocation for surface storage

In this study, an object-oriented platform has been used to perform simulations of two systems, a vapour compression heat pump and a two-phase mechanically pumped loop system that is being used for...