LHV Wobbe Index Calorimetric Systems

Gas Burnt Calorimeter

The LHV Wobbe Index Calorimetric Systems are specific integrated analysis systems aimed to assess, in real time, the following parameter(s) relevant to a gaseous stream:

  • Wobbe Index
  • LHV Low Heating Value
  • Gas Density
  • Minimum Air Requirement CARI

Why those parameters? They are the simplest way

  • To understand the Energy Content of gas for Trading
  • To guarantee the Interchangeability of different fuel gases
  • To measure the overall Quality of a gas mixture or with a Changing composition
  • To calculate the Combustion Air required


Therefore, the most common applications for LHV Wobbe Index systems are:

  • (Petro) Chemical plants
  • Blast-furnace and cokery plants
  • Cogeneration power plants
  • Fuel gas control for burners and ovens
  • Gas bottles production
  • Gas turbines & gas engines
  • Glass and porcelain factories (furnaces & ovens control)
  • Incineration plants
  • LPG / Air mixing plants
  • Mixing and/or blending of gas streams with variable compounds
  • Refineries – tail gas mixing
  • Sewage, bio and landfill gas
  • Underground natural gas storage

TECNOVA Group since 1974 has engineered & integrated hundreds of LHV Wobbe Index Calorimetric Systems installed in the most important process plant to solve challenging applications in severe environments. Steel Factories, Turbogas skids, Offshore, hazardous areas…TECNOVA Group offers always the best solution taking in account not only the CaPex but also supporting the Customer during the lifecycle of the system, from commissioning to maintenance, from validation to upgrading…our team of skilled engineers will help the Customer 24/7/365 with an on-field faultless service.

The LHV Wobbe Index Calorimetric System is available for any type of field installation:

  1. Safe Area, wall mounted
  2. Safe Area, cabinet integrated
  3. Hazardous Area, Zone 1 & 2, CE Atex Certified, EEx p pressurized cabinet
  4. Hazardous Area, Div. 1 & 2, NEC Certified, EEx p pressurized cabinet

LHV Wobbe Index

Low Heating Value Calorimeter Hazardous Area

The standard Scope of Supply of each LHV Wobbe Index Calorimetric System is typically composed by

  • Sample Probe, fully customized in accordance with Process & Design requirements
  • Sample line, engineered to guarantee the best representativeness of the process gas and fastest analysis time
  • Conditioning System, engineered and made in accordance to any different process plant with different gases and different level of dirtiness
  • Analysis Section based on stand-alone analyser or integrated system, suitable for  Safe Area or Haz Area
  • Validation Section based on pressurized bottles and pressure reduction system, also with remote control
  • I/O , HMI interface, RTU….according to customer/project requirements

Schema Calorimetri

While the fittings, tubing, JBs and miscellaneous devices are purchased in accordance with customer/project approved vendor list, REINEKE GmbH is our specific partner since ’80 for the main item: the analyser itself. Reineke has engineered and built 2 different families of analysers, named WI and RBM 2000:

  • WI: net calorific value instrument serves for the continual high-speed measurement of Wobbe Index or Low Heating Value (LHV) of flammable gases. The principle of the gas measuring unit is based on the stability of the temperature of the exhaust gas in a proportional band of 5° C burning a gas by air mixing. As the burning temperature changes the quality of the gas a regulated amount of cooling air has to be added. In this manner the amount of cooling air is proportional to the measured value.
  • RBM 2000: analyser continuously measures and determines simultaneously the Low Heating Value, the Wobbe Index, the Density and also Minimum Air Requirement (CARI). The measuring method of this measuring instrument (RBM 2000) belongs to the non-calorific class measuring method. This means, the physical properties of a gas are measured (average density, average mol mass, remaining content of oxygen in waste gas). This measuring method could also measures the remaining oxygen content in the waste gas (after combustion). From this the minimum air requirement (Lmin ) is calculated via an oxygen balance to the combustion chamber.
Why LHV Wobbe Index Integrated System by TECNOVA Group should be better than other solutions?

  1. Our Analysers perform the analysis in 5 seconds, not minutes like GC or fast GC
  2. The Analysis is done exactly by theoretical definition, there is no need to “adjust” or to do “field calibration”
  3. No catalyst at all. So no drift due to catalyst poisoning and no hidden expenses to replace the catalyst each 6 months
  4. No moving parts, so no maintenance or spare part dedicated
  5. Designed, Engineered and Integrated 101% in Italy
  6. Also Custom-Made for any tough environment or special service
  7. Full documentation package suitable for any EPC requirements
  8. On-Time delivery. Always.
  9. Skilled Service team available to operate in any site also with a short notice
  10. Full set of spare parts always in stock
See few of LHV Wobbe Index Integrated System already delivered…

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