Method and apparatus for measuring the calorific value of a gas

Details Method and apparatus for measuring the calorific value of a gas Method and apparatus for measuring the calorific value of a gas

G - Physics

01

N

G01N 29/02 (2006.01) G01K 11/24 (2006.01) G01K 17/06 (2006.01) G01N 9/24 (2006.01) G01N 25/18 (2006.01) G01N 33/22 (2006.01)

Patent

CA 2318496

Apparatus (2) comprises a chamber (4) to which a gas in question, for example natural gas is supplied through inlet (6) and leaves through outlet (8). The speed of sound SoS at ambient temperature is measured using any suitable method such as electronic control and calculating means (14) and an ultra- sound emitter (10) and an ultra-sound receiver (12). The ambient temperatures Ta is observed by temperature sensor (22), and a thermal conductivity sensor measures the thermal conductivity of the gas at two different temperatures above ambient temperature. One value ThCH of the thermal conductivity is measured at 70 ~C above ambient and the other value ThCL of the thermal conductivity is measured at 50 ~C above ambient. The control means (14) calculates the calorific value CV of the gas according to the formula: CV = a.ThCH + b.ThCL + c.SoS + d.Ta + e.Ta2 + f. where a, b, c, d, e and f are constants.

L'invention concerne un appareil (2) comprenant un compartiment (4) dans lequel on introduit un gaz déterminé, par exemple un gaz naturel, par un orifice d'admission (6) et on l'évacue par un orifice d'évacuation (8). On mesure la vitesse du son (SoS) à température ambiante par tout procédé approprié tel qu'un dispositif électronique de commande et de calcul (14) et un émetteur (10) et récepteur (12) d'ultrasons. On mesure la température ambiante T¿a? par un détecteur de température (22) et un détecteur de conductivité thermique permet de mesurer la conductivité thermique du gaz à deux températures différentes au-dessus de la température ambiante. On mesure une valeur ThC¿H? de conductivité thermique à 70 ·C au-dessus de la température ambiante et l'autre valeur ThC¿L? de conductivité thermique à 50 ·C au-dessus de la température ambiante. Le dispositif de commande (14) calcule la valeur calorifique (CV) du gaz selon la formule: CV = a.ThC¿H? + b.ThC¿L? + c.SoS + d.T¿a? + e.T¿a??2¿ + f dans laquelle a, b, c, d, e et f sont constants.

Affiliated with

Also associated with

Rating

Method and apparatus for measuring the calorific value of a gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for measuring the calorific value of a gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring the calorific value of a gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1530346