TY  - Type of reference 
TI  - Thermodynamic analysis of a high-temperature heat pump using low GWP natural working fluids for upgrading district heating to process heating 
AU  - Mohsen Sadeghi
 
AU  - Tage Petersen
 
AU  - Zhenyu Yang
 
AU  - Benjamin Zühlsdorf
 
AU  - Kim Stenholdt Madsen
 
AU  - Ahmad Arabkoohsar 
AB  - High-temperature heat pump (HTHP) is a promising technology for decarbonization of process heating through electrification and energy efficiency. Exploiting the potentials requires a simultaneous optimization of the cycle layout and the working fluid. This paper proposes an efficient cascade HTHP and optimizes its thermodynamic performance. Using steam for high-temperature loop and use of alternative hydrocarbons for low-temperature loop are examined. On the application level, district heating is considered as a heat source and evaluated for different supply temperatures, including 80 °C, 70 °C and 40 °C. The results reveal that pentane with highest critical temperature among the suggested hydrocarbons, shows the best energy performance to be paired with steam in the proposed cascade HTHP system. However, concerning the hydrocarbon compressor volumetric heating capacity (VHC) and safety issues, butane is an excellent candidate. In addition, when the heat available in the main transmission lines of district heating unit is considered as the source cooled from 80 °C down 70 °C, the highest value of coefficient of performance (COP) is achieved as 2.74 for the sink condensation temperature of 160 °C. 
DO  - 10.21494/ISTE.OP.2024.1068 
JF  - Entropy: Thermodynamics – Energy – Environment – Economy  
KW  - High-temperature heat pump, Low GWP working fluids, Steam, Hydrocarbons, District heating, High-temperature heat pump, Low GWP working fluids, Steam, Hydrocarbons, District heating,  
L1  - http://openscience.fr/IMG/pdf/iste_entropie23v4n4_2.pdf 
LA  - en 
PB  - ISTE OpenScience 
DA  - 2024/01/17 
SN  - 2634-1476 
TT  - Analyse thermodynamique d’une P.A.C. haute temperature a fluide naturel a bas G.W.P. pour renforcer le processus de chauffage d’un réseau de chauffage 
UR  - http://openscience.fr/Thermodynamic-analysis-of-a-high-temperature-heat-pump-using-low-GWP-natural 
IS  - Special issue ECOS 
VL  - 4 
ER  -