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Volumn 83, Issue 3, 2012, Pages

Invited article: A materials investigation of a phase-change micro-valve for greenhouse gas collection and other potential applications

Author keywords

[No Author keywords available]

Indexed keywords

AGING STUDIES; DEAD VOLUMES; FUTURE CLIMATE; HELIUM LEAK TESTING; HERMETIC SEALING; LEAK RATE; LOGISTICAL BURDENS; LOW COSTS; METAL ALLOYS; MICRO VALVES; NOVEL DESIGN; PHASE CHANGES; POTENTIAL APPLICATIONS; SHELF LIFE; SN-PB ALLOYS; SNPB SOLDER; TIN-LEAD; VALVE ACTUATION;

EID: 84861603148     PISSN: 00346748     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3688856     Document Type: Review
Times cited : (10)

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    • PFP vessels, using a two stage pump-compressor system, have demonstrated filling rates of 5-20 lmin and filling times of 40 s to 1 min (http://www.esrl.noaa.gov/gmd/ccgg/aircraft/sampling.html and http://www.bgc-jena.mpg.de/bgc-systems/pmwiki2/uploads/PhdAmpDiplomaThesis/baum. pdf). CARIBIC vessels in Refs. and required 30 s to 1.5 min to fill using a three-stage pump compressor capable of up to 30 lmin. Schuck (Ref.) used a three-stage pump to produce 200-300 mbar (20-30 kPa) of pressure at the sampler inlet. If we used a similar scheme with our miniature samplers, and sample at 30 000 ft, the chamber-filling pressure difference would be 0.174 psig (1.2 kPa). Correcting for temperature and altitude, the orifice flow rate (www.okcc.com) is 0.15 lmin, requiring only 20 s to fill a 50 ml sample chamber. The altitude resolution (for controlled descents) or lateral resolution (for airplane or UAV systems), is therefore much greater with the miniature vessels even considering the orifice flow restriction. Incidentally, such a 50 ml chamber can provide sufficient sample for ∼50 GC-MS analyses.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.