Development of a new primary humidity measurement standard

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F20%3AN0000016" target="_blank" >RIV/00177016:_____/20:N0000016 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00177016:_____/19:N0000015

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6501/ab4a54" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6501/ab4a54</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6501/ab4a54" target="_blank" >10.1088/1361-6501/ab4a54</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of a new primary humidity measurement standard

Popis výsledku v původním jazyce

A new primary humidity generator was developed at the National Standards Authority of Ireland (NSAI). The principles of operation and overall design of the generator are discussed. The flow regime within the saturators was analysed using computational fluid dynamics (CFD) to determine if sufficient mixing takes place within the final saturator. This was later investigated by experiment and it was found that sufficient mixing takes place for flow rates up to 3 l min−1 at standard flow conditions of 101 325 Pa and 293.15 K. The uncertainty due to non-ideal saturation at 90 °C dp is discussed. This uncertainty was analysed with respect to the effect that the flow speed and latent heating in the saturators has on the saturation efficiency, separately. The uncertainty associated with saturation efficiency at 90 °C dew point was estimated from the temperature gradients along the saturation path arising due to latent heating effects. The standard uncertainty due to non-ideal saturation was found to be  ±3 mK dp.

Název v anglickém jazyce

Development of a new primary humidity measurement standard

Popis výsledku anglicky

A new primary humidity generator was developed at the National Standards Authority of Ireland (NSAI). The principles of operation and overall design of the generator are discussed. The flow regime within the saturators was analysed using computational fluid dynamics (CFD) to determine if sufficient mixing takes place within the final saturator. This was later investigated by experiment and it was found that sufficient mixing takes place for flow rates up to 3 l min−1 at standard flow conditions of 101 325 Pa and 293.15 K. The uncertainty due to non-ideal saturation at 90 °C dp is discussed. This uncertainty was analysed with respect to the effect that the flow speed and latent heating in the saturators has on the saturation efficiency, separately. The uncertainty associated with saturation efficiency at 90 °C dew point was estimated from the temperature gradients along the saturation path arising due to latent heating effects. The standard uncertainty due to non-ideal saturation was found to be  ±3 mK dp.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/8B16006" target="_blank" >8B16006: Expansion of European research capabilities in humidity measurement</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Measurement Science and Technology

ISSN

0957-0233

e-ISSN

1361-6501

Svazek periodika

31

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000499383000001

EID výsledku v databázi Scopus

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