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?.
|Title of host publication||IIR Rankine 2020 International Conference - Advances in Cooling, Heating and Power Generation, Rankine 2020|
|Publisher||International Institute of Refrigeration|
|Number of pages||6|
|Publication status||Published - 2020|
|Event||2020 IIR Rankine International Conference on Advances in Cooling, Heating and Power Generation, Rankine 2020 - Virtual, London, United Kingdom|
Duration: 2020 Jul 27 → 2020 Jul 31
|Name||Refrigeration Science and Technology|
|Conference||2020 IIR Rankine International Conference on Advances in Cooling, Heating and Power Generation, Rankine 2020|
|Period||20/7/27 → 20/7/31|
Bibliographical noteFunding 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).
© 2020 International Institute of Refrigeration. All rights reserved.
- Diffusion absorption refrigeration
- Evaporation temperature
- Low-GWP refrigerants
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering
- Mechanical Engineering
- Condensed Matter Physics