RT Journal Article
T1 Carbon dioxide and acetone mixtures as refrigerants for industry heat pumps to supply temperature in the range 150-220 ºC
A1 Gómez Hernández, Jesús
A1 R., Grimes
A1 Villa Briongos, Javier
A1 Marugán Cruz, Carolina
A1 Santana Santana, Domingo José
AB Industry decarbonization is a key a challenge towards the transition to climate neutrality. Indeed, there is a need to satisfy heat at temperatures higher than 150 °C in relevant industrial sectors by upgrading lower temperature heat flows, such as heat from renewable heat sources, ambient heat or industrial waste heat. High temperature heat pumps (HTHP) can upgrade such heat flows enabling great savings in carbon emissions. New refrigerants are needed to develop HTHPs achieving high performances at high temperatures. This paper proposes the use of a new zeotropic mixture composed of carbon dioxide and acetone as the refrigerant of HTHPs working in the temperature range of 150-220 °C. The new fluid is compared with existing pure refrigerants currently used. The thermodynamic characterization of the CO2/acetone mixtures shows temperature glides below 50 K for CO2 mass fractions up to 10%. The best HTHP performance is shown for the mixture 5% CO2/95% acetone in mass fraction. For instance, such a mixture obtains a COP of 5.63 when the target outlet sink temperature is 200 °C and the temperature difference between the outlet heat sink and the inlet heat source is 70 K, showing an improvement of 46% compared to pure acetone.
PB Elsevier
SN 0360-5442
YR 2023
FD 2023-04-15
LK https://hdl.handle.net/10016/38912
UL https://hdl.handle.net/10016/38912
LA eng
NO This work has been supported by the Madrid Government (Comunidadde Madrid-Spain) under the Multiannual Agreement with UC3Min the line of Excellence of University Professors (EPUC3M22), and inthe context of the V PRICIT (Regional Programme of Research andTechnological Innovation).
DS e-Archivo
RD 18 jul. 2024