| Title |
Lower Flammability Limits of Flammable Refrigerants According to ASTM E681-04 Standard |
| Authors |
박기정(Ki-Jung Park) ; 우승규(Seung-Gyoo Woo) ; 정동수(Dongsoo Jung) |
| Keywords |
가연성 ; 가연성 냉매 ; 희박 가연 한계 Flammability ; Flammable refrigerants ; Lower flammability limits(LFL) |
| Abstract |
In this study, lower flammability limits (LFLs) of three hydrocarbon refrigerants (R600a, R290, R1270) and two hydrofluorocarbon refrigerants (R152a, R32) and DME (RE170) are measured by the method proposed by ASTM E681-04 Standard. Flammability tests are carried out at three temperatures of 23℃, 60℃ and 100℃ and relative humidity 50%. Test results show that the present data for isobutane and propane obtained at 23℃ are similar to those found in the literature, confirming indirectly the reliability of the present test method and facility. For propylene, R152a, and R32, LFLs found in the literature differ considerably. Especially, the deviation of LFL of propylene is more than 30% among the literature data. The present data for propylene, R152a, and R32 agree with either of the data sets available. As the temperature increases from 23℃ to 100℃, LFLs of all refrigerants tested decrease. LFLs of most refrigerants tested in this study at 60℃ decrease by 0.1～0.3% as compared to those at 23℃. Also LFLs of most refrigerants tested in this study at 100℃ decrease by 0.1 ～0.3% as compared to those at 60℃. |