Summer performance comparison of transcritical R744 condensing units based on experimental data and several climates

Paride Gullo, Michael Birkelund, Ekaterini E. Kriezi, Martin Ryhl Kærn

Publikation: Kapitel i bog/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

Abstrakt

In this work an experimental campaign involving a standard transcritical R744 system (i.e. with vapour by-pass valve) and two transcritical R744 systems using the pulse-width modulation (PWM) ejector (with and without overfed evaporator) was conducted. Firstly, the summer performance of the aforementioned solutions was assessed in six European locations, i.e. Oslo (Norway), Paris (France), Lisbon (Portugal), Madrid (Spain), Seville (Spain) and Athens (Greece). It was found that the PWM ejector coupled with the overfed evaporator leads to increases in summer average coefficient of performance (COPsummer avg) from 3.0 % (in Oslo) to 6.7 % (in Athens) compared to the standard system. Finally, five hot locations, i.e. Miami (USA), Bangkok (Thailand), New Delhi (India), Phoenix (USA), Riyadh (Saudi Arabia), were also included. The PWM ejector combined with the overfed evaporator was observed to increase the COPsummer avg by from 7.3 % (in Miami) to 13.1 % (in Riyadh).
OriginalsprogEngelsk
Titel15th IIR-Gustav Lorentzen conference on Natural Refrigerants
Publikationsdato13. jun. 2022
DOI
StatusUdgivet - 13. jun. 2022
Begivenhed15th IIR-Gustav Lorentzen conference on Natural Refrigerants - Trondheim, Norge
Varighed: 12. jun. 202215. jun. 2022
https://www.sintef.no/projectweb/gustavlorentzen_2022/

Konference

Konference15th IIR-Gustav Lorentzen conference on Natural Refrigerants
LokationTrondheim
Land/OmrådeNorge
Periode12/06/202215/06/2022
Internetadresse

Fingeraftryk

Dyk ned i forskningsemnerne om 'Summer performance comparison of transcritical R744 condensing units based on experimental data and several climates'. Sammen danner de et unikt fingeraftryk.

Citationsformater