The European Large Hadron Collider is no longer cold and part-time heating for residents

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 The European Large Hadron Collider is no longer cold and part-time heating for residents


Our reporter Liu Yuanyuan

The Large Hadron Collider (LHC), as it is called, is very cold. In the minds of ordinary people, this device, which is busy smashing all kinds of particles, will probably only contact top physicists.

But we really have to change our stereotypes about it - its hard to imagine that this tall scientific device will try to heat the surrounding residents.

On July 23, the European Centre for Nuclear Research (CERN) announced that it had signed an agreement with the French local authorities to consider the recycling of heat generated by the LHC and to provide it to the nearby Fene-Voltaire community for winter heating from 2022.

Turn a small cycle into a big one

The scientific device for studying particles, how to heat the residents? This has to start with the heat generated by the LHC.

The LHC is one of the largest scientific devices in the world. It stretches 27 kilometers underground and has a power of 100 MW, or 100 MW. Gao Jie, a researcher at the Institute of High Energy Physics of the Chinese Academy of Sciences and head of the accelerator of the Ring Positron Collider (CEPC), told Sci-tech Daily that such a high-power scientific device would generate a lot of heat when it was running.

Cooling system is needed to keep the scientific device at an appropriate working temperature.

According to CERN Energy Coordinator Serge Claude, many systems and devices in CERN use water for cooling: first, cold water is injected into the cooling pipe, and the hot water generated is collected and sent to the cooling tower to cool down, and then again into the cooling pipe.

Now the cooling pipe is a small cycle, heat will be lost in the cooling tower; if the cooling pipe into a large cycle, the outflow of hot water into the homes of nearby residents, the original lost heat will play a heating role. Gao Jie said.

CERN intends to try a second approach. It plans to export some of the hot water collected at the LHC8 experimental site to a heating system currently under construction in the Fene-Voltaire community. In the future, the homes of up to 8,000 residents will be able to heat at lower cost while reducing carbon dioxide emissions.

According to Gao Jies analysis, since heating water is generally circulating, the water flowing into residentshomes will return to CERN along the pipeline after completing the heating mission and gradually cooling, and re-inject the cooling pipeline, that is to say, the heating step replaces the cooling tower.

Green Collider is a New Trend

At present, the pipeline construction for connecting the LHC8 experimental site and the Fene-Voltaire community has begun. It is expected that the initial test of the heat recovery system will be carried out in 2021, and some residents of the Fene-Voltaire community will be able to enjoy the heat provided by the LHC in 2022.

Hot water flowing out of cooling pipes can reach 30 degrees Celsius, which is very useful for energy recovery and utilization. Claude said.

Gao Jie told Sci-tech Daily that the cooling water of 30 degrees Celsius belongs to low-temperature heat source, which is more difficult to recycle than high-temperature heat source. The schematic diagram provided by CERN shows that geothermal probe equipment may be used to save heat and reduce temperature fluctuations in heating pipelines.

Claude said that CERN has carried out a number of studies and found that LHCs No. 2 and No. 5 experimental sites can also be used to provide heat for nearby communities. At the same time, they are considering heating the building where CERN headquarters is located by using the heat collected at the No. 1 Experimental site.

Green Collider has become a new topic and a future development trend. Gao Jie introduced that scientists are discussing and designing a variety of methods to collect the high-temperature heat or low-temperature heat generated by large colliders and fully realize energy recovery and utilization. In addition to the use of cooling pipes, scientists have also proposed a bold design: the use of solid materials with strong endothermic properties, while not easy to dissipate heat, to fully absorb the heat generated by the collider, and then transport the materials to places where energy needs to be used for heat dissipation. As a board member of the International Linear Collider (ILC), Gao Jie told Sci-Tech Daily that the CEPC plan proposed by Chinese physicists and the ILC project that Japan is actively striving for will have operating power of more than 100 MW in the future. Both of them are considering how to realize the Green Collider. (Science and Technology Daily, Beijing, July 24) Source of this article: responsible editor of Science and Technology Daily: Wang Fengzhi_NT2541

Green Collider has become a new topic and a future development trend. Gao Jie introduced that scientists are discussing and designing a variety of methods to collect the high-temperature heat or low-temperature heat generated by large colliders and fully realize energy recovery and utilization.

In addition to the use of cooling pipes, scientists have also proposed a bold design: the use of solid materials with strong endothermic properties, while not easy to dissipate heat, to fully absorb the heat generated by the collider, and then transport the materials to places where energy needs to be used for heat dissipation.

As a board member of the International Linear Collider (ILC), Gao Jie told Sci-Tech Daily that the CEPC plan proposed by Chinese physicists and the ILC project that Japan is actively striving for will have operating power of more than 100 MW in the future. Both of them are considering how to realize the Green Collider.

(Beijing, July 24, Science and Technology Daily)