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Report on the reference densities of water and air employed for the adjustment of vibrating tube density meter
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SYSNO ASEP 0504773 Druh ASEP V - Výzkumná zpráva Zařazení RIV O - Ostatní Název Report on the reference densities of water and air employed for the adjustment of vibrating tube density meter Tvůrce(i) Vinš, Václav (UT-L) RID, ORCID
Prokopová, Olga (UT-L)Celkový počet autorů 2 Vyd. údaje Praha: Ústav termomechaniky AV ČR, v. v. i., 2019 Poč.str. 15 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova vibrating tube densimeter ; calibration ; density ; equation of state Vědní obor RIV BJ - Termodynamika Obor OECD Thermodynamics CEP GA19-05696S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 Anotace The report summarizes accurate models for densities of pure water and humid air at atmospheric pressure which are needed for temperature calibration of the vibrating tube densimeter, particularly Anton Paar DMA 5000 M. For an accurate calibration of the instrument, several technical issues have to be addressed. This report serves as a basis for a discussion with the representatives of company Anton Paar. Using the Matlab software, several algorithms were developed for calculation of water density using (i) Wagner and Prüß (2002) equation of state IAPWS-95, (ii) Tanaka et al. (2001) CIPM standard, and (iii) Spieweck and Bettin (1992) mathematical formulation. In accordance with the guideline IAPWS G8-10, a humid air model was programmed based on the dry-air equation of state by Lemmon et al. (2000) and the IAPWS-95 equation for water vapor. The results for humid air were compared with the CIPM standard by Picard et al. (2008) and a simplified mathematical formulation from Spieweck and Bettin (1992). The final part presents density data for pure water measured in the Laboratory of Thermophysical Properties in the temperature range from 2 to 50 ° C for various reference relationship settings of the water and humid air densities considered in the instrument calibration.
Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2020
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