Caloric Quantities

Realization and dissemination of the unit of heat using calorimetry in accordance with Section 6 of the Units and Time Act (EinhZeitG) and Sections 45 and 47 of the Measures and Verification Act (MessEG).

This encompasses:

• the use of adiabatic precision calorimeters directly traceable to the system of units for the determination of heat capacities, reaction heats and heats of transition;
• the use of commercial calorimeters for tasks with lesser requirements with regard to the uncertainty or for tasks in extreme state ranges;
• the rendering of support to research and industry by means of calibration procedures and calibration materials which are adapted to the specific problems arising, and
• participation in the development of standards in several standardization organizations.
  
  

Conformity assessment of calorific value determination devices for gases in accordance with Section 14(3) of the Measures and Verification Act and Section 1(10) of the Measures and Verification Ordinance (MessEV).

This applies to the quantity calorific value of fuel gases and to the following measuring instruments:

• calorific value measuring devices for gases
• state reconstruction systems
• ancillary equipment (data storage devices, interface converters, etc.)

The Working Group's research & development tasks are organized in the form of projects. In this context, support in the form of third-party funding is welcome.

• Determination of the calorific value of raw and refined biogas by means of field calorimetry
  (EMRP ENG54, Metrology for Biogas, 2014-2017, Euramet)
• Methane losses during the upgrading of biogas to natural gas quality.
  (Monitoring of the biomethane production process - MONA, 2011-2015, FNR)
• Determining the measurement uncertainty for gas grid reconstruction systems
  (error propagation in cascading networks; development and metrological validation of measurement grids and reconstruction systems for gas supply networks – MetroGas, 2010 – 2014, DVGW)
• Determining the calorific value of non-conventional fuel gases by means of field calorimetry
  (EMRP ENG01, Characterisation of Energy Gases, 2010-2013, Euramet)
• Heat capacity of high-temperature thermal insulation layer materials
  (EMRP ENG06, Metrology for Improval Power-Plant-Efficiency, 2010-2013, Euramet)
• Application development and characterization of a micro process gas chromatograph for biogas
  (development of the prototype of a process measuring instrument which is admissible for type approval, for the determination of the calorific value of biogases by means of a novel micro gas chromatograph ("Biogas-µPGC"); application development and characterization of the "Biogas-µPGC" within the scope of the development of a gas mixing facility for traceable test gases, 2008 – 2010, PRO INNO II)
• Metal/carbon eutectics as reference materials for differential scanning calorimetry
  (2008-2010, NMPQ-Transfer)
• Cryoscopic methods for purity determination of high-purity metals
  (influence of impurities on the phase equilibrium temperatures of highest-purity metals and binary metal alloys, 2005 - 2009, DFG)
• Developing and setting up a reference calorimeter for the determination of the calorific value of gases
  (2002-2009, GERG, DVGW)
• Micro gas calorimeter for the determination of the calorific value of gases
  (2004-2006, AiF IGF)
• Adiabatic calorimetry for the determination of heat capacities and heats of transition

The services offered by this Working Group serve to disseminate the units and to support society and industry.

• Services for society (legal metrology):
• Conformity assessment pursuant to the Measures and Verification Act (MessEG) for
• calorific value determination devices
• gas quality measuring devices, especially calorific value reconstruction systems
• their ancillary devices
• Provision of consultancy to the verification authorities and to the relevant industrial companies in order to guarantee uniformity in legal metrology
• Participation in the development of rules of technology in relevant committees:
• DVGW Deutscher Verein des Gas- und Wasserfaches e.V.: G-TK-1-5 "Gasmessung und Abrechnung“ ("Gas measurement and billing")
• Arbeitsgemeinschaft Mess- und Eichwesen AGME: Arbeitsausschuss Gasmessung (Working committee "Gas measurement")
• Services for the economy (industrial metrology):
• Measurements carried out by means of differential scanning calorimetry (DSC), thermogravimetry or differential thermal analysis
• Supply of heat and temperature calibration materials for differential scanning calorimetry:
• supplier, prices, contact
• method
• Participation in the development of rules of technology in relevant committees:
• DIN Deutsches Institut für Normung e.V.: DIN NA 062-08-14 AA "Thermal Analysis"
• Gesellschaft für Thermische Analyse e.V. (GEFTA)
• Arbeitskreis Thermophysik (AKT)

For compiled information from our Working Group, please click on one of the items below:

• DSC calibration material
• Seminars and conferences
• Publications