000			01934nam a2200229 4500
005			20260520010135.0
008			260224s2006 xxu
245	0	0	_aNew thermail conductivity microsensor to measure the methane number of natural gas
260			_aAmsterdam _b _c2006
270			_a14/06/2012 ; 29/07/2008
300			_a12 p.
520			_aMethane number is the parameter used to quantify knocking tendency of a combustible gas, parameter especially relevant when said gas is used as engines fuel. The present paper proposes a new method to determine on line the methane number of natural gas. The method is based on the measurement of the gas thermal conductivity and the correlation between this parameter and the methane number of natural gas. The developed thermal conductivity microsensor is ascribed to microsystems technology. It integrates two Pt thermoresistors each patterned on a microbridge, defined in turn in the silicon substrate by surface micromachining. Porous silicon is used as sacrificial layer. In the considered methane number range (60-100), a linear output with a sensitivity of 0.95mV/1MN is obtained when a 50mA constant current is applied to the sensing thermoresistor. Furthermore, microdevice is mounted in a gas line rig in order to test it in field. Additional tests are still required but it can be concluded that developed microsensor is a valid alternative to measure in situ the methane number of natural gas. Resumen publicado por el autor.
773			_g
942			_cCONGTP
100	1		_aGutierrez, A.M. _922208
110	2		_aNaturgas Energia Group _939851
110	2		_aWärtsilä Ibérica _939852
110	2		_aCEIT Research Centre _939853
111	2		_aWorld Gas Conference (23rd. : 2006 jun 5-9 : Amsterdam, The Netherlands) _939854
999			_c168543 _d168543
856			_uhttp://igs.nigc.ir/igs/standard/IGU-2006/localhost/wgc/pdf/paper/add9666.pdf