Cristin-resultat-ID: 1942254
Sist endret: 4. oktober 2021, 09:53
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2021

Screening of Future-Proof Working Fluids for Industrial High-Temperature Heat Pumps up to 250 °C (Part I)

Bidragsytere:
  • Alexander C. Pachai
  • Jeannett Normann
  • Cordin Arpagaus og
  • Armin Hafner

Bok

9th Conference on Ammonia and CO2 Refrigeration Technologies Ohrid, R. Macedonia September 16-17, 2021 Proceedings
ISBN:
  • 978-2-36215-046-3

Utgiver

International Institute of Refrigeration
NVI-nivå 1

Serie

Science et technique du froid
ISSN 0151-1637
e-ISSN 1766-0408
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2021
Hefte: 2021
Sider: 39 - 45
ISBN:
  • 978-2-36215-046-3

Klassifisering

Fagfelt (NPI)

Fagfelt: Energi
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Screening of Future-Proof Working Fluids for Industrial High-Temperature Heat Pumps up to 250 °C (Part I)

Sammendrag

If industry wants to phase out fossil steam boilers, heat pumps will have to produce steam at a temperature of about 160 °C or higher, as this is a kind of standard in current steam systems. Even 250 °C is used in some drying processes where dry saturated steam is needed because it is hygroscopic. In addition, many district heating systems in Europe still operate at 120 °C, although new systems with lower supply temperatures are becoming a new standard. Overall, this situation has sparked interest in industrial high-temperature heat pumps (HTHPs). Very often, screening for possible new refrigerants or working fluids to be used in HTHPs does not provide the full picture, especially when considering the selection of everyday parameters such as valves, compressors and oil. Therefore, this paper uses NIST's software called Cycle_D (Version 6.0), which contains the latest refrigerant data from REFPROP (Version 10.0). For comparison, the Cycle_D_HX software has too many limitations to run the simulations for HTHPs. In this study, only the refrigerant cycle is considered, although much can be done to improve efficiency by optimizing the secondary side of the system. HTHPs with condensing temperatures above 90 °C and up to 250 °C are simulated in Cycle_D. The results show that there is no universal low-GWP refrigerant suitable for all applications up to about 230 °C. However, the hydrocarbons butane (R600), iso-butane (R600a), pentane (R601) and heptane (R603) are good environmentally friendly solutions. For temperatures above 230 to 250 °C, steam (R718) is probably the only option.

Bidragsytere

Alexander C. Pachai

  • Tilknyttet:
    Forfatter
    ved Danmark

Jeannett Normann

  • Tilknyttet:
    Forfatter
    ved Danmark

Cordin Arpagaus

  • Tilknyttet:
    Forfatter
    ved Sveits
Aktiv cristin-person

Armin Hafner

  • Tilknyttet:
    Forfatter
    ved Institutt for energi- og prosessteknikk ved Norges teknisk-naturvitenskapelige universitet
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9th Conference on Ammonia and CO2 Refrigeration Technologies Ohrid, R. Macedonia September 16-17, 2021 Proceedings.

IIR, .. 2021, International Institute of Refrigeration. Vitenskapelig antologi/Konferanseserie
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