TY - JOUR
T1 - Performance analysis of R1234yf/ionic liquid working fluids for single-effect and compression-assisted absorption refrigeration systems
AU - Sun, Yanjun
AU - Di, Gaolei
AU - Wang, Jian
AU - Wang, Xiaopo
AU - Wu, Wei
PY - 2020/1
Y1 - 2020/1
N2 - Due to the disadvantages of conventional working pairs (NH3/H2O and H2O/LiBr) in the absorption-refrigeration cycles, 2,3,3,3-Tetrafluoroprop-1-ene(R1234yf)/ionic liquid (IL), which possessed of remarkable properties, has received more and more attention. In this work, the thermodynamic performance of single-effect and compression-assisted absorption refrigeration cycles were analyzed using R1234yf as refrigerant and ILs (including [emim][BF4], [hmim][BF4], [omim][BF4], [hmim][Tf2N], [hmim][PF6] and [hmim][TfO]) as absorbent, the thermodynamic properties of working pairs was estimated by the NRTL model. The effects of generation, evaporation, condensation and absorption temperature as well as compression ratio on the cooling performance and circulation ratio were studied in various working conditions. Compared to the single-effect cycle, the compression-assisted cycle effectively improves the cooling performance, reduces the circulation ratio and extends the operation range of generation, evaporation and absorption temperatures. At the same working condition, [hmim][Tf2N] performs the best while [emim][BF4] has the lowest COP, the cooling performance of [hmim][BF4], [omim][BF4], [hmim][TfO] and [hmim][PF6] is similar.
AB - Due to the disadvantages of conventional working pairs (NH3/H2O and H2O/LiBr) in the absorption-refrigeration cycles, 2,3,3,3-Tetrafluoroprop-1-ene(R1234yf)/ionic liquid (IL), which possessed of remarkable properties, has received more and more attention. In this work, the thermodynamic performance of single-effect and compression-assisted absorption refrigeration cycles were analyzed using R1234yf as refrigerant and ILs (including [emim][BF4], [hmim][BF4], [omim][BF4], [hmim][Tf2N], [hmim][PF6] and [hmim][TfO]) as absorbent, the thermodynamic properties of working pairs was estimated by the NRTL model. The effects of generation, evaporation, condensation and absorption temperature as well as compression ratio on the cooling performance and circulation ratio were studied in various working conditions. Compared to the single-effect cycle, the compression-assisted cycle effectively improves the cooling performance, reduces the circulation ratio and extends the operation range of generation, evaporation and absorption temperatures. At the same working condition, [hmim][Tf2N] performs the best while [emim][BF4] has the lowest COP, the cooling performance of [hmim][BF4], [omim][BF4], [hmim][TfO] and [hmim][PF6] is similar.
KW - Absorption refrigeration
KW - Compression-assisted cycle
KW - Hydrofluoroolefins
KW - Ionic liquid
KW - Single-effect cycle
UR - http://www.scopus.com/inward/record.url?scp=85074444587&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85074444587&origin=recordpage
U2 - 10.1016/j.ijrefrig.2019.10.007
DO - 10.1016/j.ijrefrig.2019.10.007
M3 - RGC 21 - Publication in refereed journal
SN - 0140-7007
VL - 109
SP - 25
EP - 36
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
ER -