ドライアイスブラストの洗浄力向上を目指した固体二酸化炭素冷却システム

Solid carbon dioxide cooling system aiming at improving the detergency of dry ice blast cleaning

Creators Fujinaka Junya

Creators Masuyama Shinji

Creators Masutani Morihiro

Creators Tamura Ryosuke

Creators Nishimura Hayato

Dry ice blast cleaning has some advantages over conventional cleaning methods such as sand blast cleaning. However， the detergency is not sufficient for particular users because a hardness of dry ice is approximately 2 Mohs. To increase the detergency， a solid carbon dioxide (CO2) is required as a blasting material. From the point of view， a new cooling system to produce the solid CO2 using a single stage Gifford-McMahon (G-M) cryocooler (SUZUKISHOKAN， RF90S) with a ompressor (SUZUKISHOKAN， C300G) was constructed and tested. The G-M cryocooler directly cools a cold box containing the ethanol solution. A CO2
vessel is immersed in the ethanol solution， and a solid CO2 is produced in the CO2 vessel. Experimental result showed that the temperature of ethanol solution achieved temperatures below -56.6 ℃ that is the triple point of CO2. This result indicates that it would be possible to produce the solid CO2 using this cooling system. This paper describes the configuration of new cooling system， experimental results of cooling characteristics， and numerical analysis.

[ISSN]0387-9232

[NCID]AN00031668