EP 1181531 A1 20020227 - METHOD AND ARRANGEMENT FOR MEASURING THE CALORIFIC VALUE AND/OR THE WOBBE INDEX OF COMBUSTIBLE GAS, ESPECIALLY NATURAL GAS
Title (en)
METHOD AND ARRANGEMENT FOR MEASURING THE CALORIFIC VALUE AND/OR THE WOBBE INDEX OF COMBUSTIBLE GAS, ESPECIALLY NATURAL GAS
Title (de)
VERFAHREN UND ANORDNUNG ZUR MESSUNG DES BRENNWERTES UND/ODER DES WOBBEINDEXES VON BRENNGAS, INSBESONDERE VON ERDGAS
Title (fr)
PROCEDE ET DISPOSITIF DE MESURE DE LA PUISSANCE CALORIFIQUE ET/OU DE L'INDICE DE WOBBE DE GAZ COMBUSTIBLE, EN PARTICULIER DE GAZ NATUREL
Publication
Application
Priority
- DE 19908046 A 19990224
- DE 19921167 A 19990507
- EP 0001054 W 20000210
Abstract (en)
[origin: WO0050874A1] The invention relates to a method and an arrangement for measuring the calorific value and/or the Wobbe index of combustible gas, especially natural gas. Said method comprises the following steps: a) the sonic speed or the density of the combustible gas is measured; b) the combustible gas is exposed to infrared radiation and the proportion of the infrared radiation that is absorbed by the combustible gas is measured by means of a sensor arrangement; c) and the calorific value and/or the Wobbe index is derived from the two measuring signals. In the inventive arrangement for measuring the calorific value, a partial flow of the combustible gas is supplied to a measuring arrangement (8). A measuring device for measuring the sonic speed and a sensor arrangement (3) are incorporated in said measuring arrangement (8), said sensor arrangement consisting essentially of a source of radiation for the infrared radiation and a radiation detector which is associated with said source of radiation. The signals of the measuring device (9) and the sensor arrangement (3) are conveyed to an evaluation unit (5) in which the calorific value and/or the Wobbe index is determined by means of a correlation.
IPC 1-7
IPC 8 full level
G01N 21/35 (2006.01); G01N 33/22 (2006.01)
CPC (source: EP)
G01N 21/3504 (2013.01); G01N 33/225 (2013.01)
Citation (search report)
See references of WO 0050874A1
Citation (examination)
- EP 0882977 A1 19981209 - GAZ DE FRANCE [FR]
- US 6157455 A 20001205 - PINVIDIC JEAN-JACQUES [FR], et al
- DE 19707659 A1 19980827 - BETR FORSCH INST ANGEW FORSCH [DE]
- LUEPTOW RICHARD M ET AL.: "Acoustic sensor for determining combustion properties of natural gas", MEAS. SCI. TECHNOL., vol. 5, no. 11, 1 November 1994 (1994-11-01), BRISTOL, GB, pages 1375 - 1381, XP020065812, ISSN: 0957-0233
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 0001054 W 20000210; EP 00910660 A 20000210