Study of R-404a and R-488a Refrigerants in Low Temperature Refrigeration of Electronics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00325935" target="_blank" >RIV/68407700:21220/18:00325935 - isvavai.cz</a>

Výsledek na webu

<a href="http://iifiir.org/clientBookline/service/reference.asp?INSTANCE=EXPLOITATION&OUTPUT=PORTAL&DOCID=IFD_REFDOC_0024875&DOCBASE=IFD_REFDOC_EN&SETLANGUAGE=EN" target="_blank" >http://iifiir.org/clientBookline/service/reference.asp?INSTANCE=EXPLOITATION&OUTPUT=PORTAL&DOCID=IFD_REFDOC_0024875&DOCBASE=IFD_REFDOC_EN&SETLANGUAGE=EN</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.18462/iir.hfo.2018.1180" target="_blank" >10.18462/iir.hfo.2018.1180</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of R-404a and R-488a Refrigerants in Low Temperature Refrigeration of Electronics

Popis výsledku v původním jazyce

The more ecological alternatives to R-404A such is the R-448A, R-449A or R-452A are viable non-flammable fluids for low temperature refrigeration. Very low evaporation temperatures can be achieved with two-stage reciprocating compressors, which are commercially available from multiple large manufacturers. The combination of these fluids and two-stage compressions with inter-stage cooling enables low evaporation temperature down to -70°C. The ecological replacements for R-404A have many disadvantages including lower cooling capacities, very high temperature glides and high discharge temperatures. Number of studies has been presented recently but little attention has been paid to the low temperature applications outside commercial refrigeration. We present a comparison of R-448A and R-404A refrigerants to R-218, which can be taken as a benchmark fluid in our field of low temperature cooling of high-tech electronic devices like elementary particle detectors. Our measurements were performed using special oil-less experiment cooling circuit equipped with large number of pressure and temperature sensor, flowmeters, etc. We have used Roman Pot detectors as a real power load that is installed in the Large Hadron Collider tunnel at CERN.

Název v anglickém jazyce

Study of R-404a and R-488a Refrigerants in Low Temperature Refrigeration of Electronics

Popis výsledku anglicky

The more ecological alternatives to R-404A such is the R-448A, R-449A or R-452A are viable non-flammable fluids for low temperature refrigeration. Very low evaporation temperatures can be achieved with two-stage reciprocating compressors, which are commercially available from multiple large manufacturers. The combination of these fluids and two-stage compressions with inter-stage cooling enables low evaporation temperature down to -70°C. The ecological replacements for R-404A have many disadvantages including lower cooling capacities, very high temperature glides and high discharge temperatures. Number of studies has been presented recently but little attention has been paid to the low temperature applications outside commercial refrigeration. We present a comparison of R-448A and R-404A refrigerants to R-218, which can be taken as a benchmark fluid in our field of low temperature cooling of high-tech electronic devices like elementary particle detectors. Our measurements were performed using special oil-less experiment cooling circuit equipped with large number of pressure and temperature sensor, flowmeters, etc. We have used Roman Pot detectors as a real power load that is installed in the Large Hadron Collider tunnel at CERN.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/LM2015058" target="_blank" >LM2015058: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of 1st IIR international conference on the application of HFO refrigerants

ISBN

9782362150272

ISSN

—

e-ISSN

—

Počet stran výsledku

9

Strana od-do

—

Název nakladatele

International Institute of Refrigeration

Místo vydání

Paris

Místo konání akce

Birmingham

Datum konání akce

2. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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