TY - GEN
T1 - Diffusion absorption refrigeration cycle analysis with low GWP refrigerants
AU - Lee, Gawon
AU - Kim, Gahyeong
AU - Kang, Yong Tae
N1 - Funding Information:
This work was supported by Korea Institute of Energy Technology Evaluation and Planning(KETEP) grant funded by the Korea government(MOTIE)(No. 10060218, The development of cooling capacity 200RT class tripple effect gas fired absorption chiller).
Publisher Copyright:
© 2020 International Institute of Refrigeration. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Many refrigerant/absorbent pairs such as ammonia/water and various HCFCs or HFCs with organic absorbents have been applied for diffusion absorption refrigeration(DAR) system. However, due to the toxicity and corrosiveness of ammonia and high GWPs of other refrigerants, this study focuses on applying low-GWP refrigerants as alternatives and executing a numerical simulation of the DAR system. R600a/n-Octane is used for the working fluids and helium is chosen as an auxiliary gas. The performance and minimum evaporation temperature characteristics are investigated with different generator temperatures in the range of 85?-160?. The effects of the total system pressure and the evaporation temperature are also considered as the key parameters. It was found that minimum evaporation temperature monotonically dropped as the generator temperature increased. However, the coefficient of performance(COP) reached its peak at a certain point and decreased when the generator temperature increased beyond a critical point. The highest COP was estimated 0.48 at the total system pressure of 3.5 bar and the generator temperature of 85?.
AB - Many refrigerant/absorbent pairs such as ammonia/water and various HCFCs or HFCs with organic absorbents have been applied for diffusion absorption refrigeration(DAR) system. However, due to the toxicity and corrosiveness of ammonia and high GWPs of other refrigerants, this study focuses on applying low-GWP refrigerants as alternatives and executing a numerical simulation of the DAR system. R600a/n-Octane is used for the working fluids and helium is chosen as an auxiliary gas. The performance and minimum evaporation temperature characteristics are investigated with different generator temperatures in the range of 85?-160?. The effects of the total system pressure and the evaporation temperature are also considered as the key parameters. It was found that minimum evaporation temperature monotonically dropped as the generator temperature increased. However, the coefficient of performance(COP) reached its peak at a certain point and decreased when the generator temperature increased beyond a critical point. The highest COP was estimated 0.48 at the total system pressure of 3.5 bar and the generator temperature of 85?.
KW - COP
KW - Diffusion absorption refrigeration
KW - Evaporation temperature
KW - Low-GWP refrigerants
KW - R600a
UR - http://www.scopus.com/inward/record.url?scp=85099274022&partnerID=8YFLogxK
U2 - 10.18462/iir.rankine.2020.1141
DO - 10.18462/iir.rankine.2020.1141
M3 - Conference contribution
AN - SCOPUS:85099274022
T3 - Refrigeration Science and Technology
SP - 194
EP - 199
BT - IIR Rankine 2020 International Conference - Advances in Cooling, Heating and Power Generation, Rankine 2020
PB - International Institute of Refrigeration
T2 - 2020 IIR Rankine International Conference on Advances in Cooling, Heating and Power Generation, Rankine 2020
Y2 - 27 July 2020 through 31 July 2020
ER -