Table 1 Test conditions
Objective of investigation | CNTs type | Refrigerant type | Oil concentration xo (wt.%) | Heat flux q(kWm-2) | Initial liquid-level height L(cm) | Original CNTs concentration φn (vol.%) |
---|---|---|---|---|---|---|
Influence of CNTs physical dimension on migration | CNT#1, CNT#2, CNT#3, CNT#4 | R113 | 0 | 50 | 2.0 | 0.56, 1.11, 1.65, 2.19, 2.72, 3.25, 3.77 |
Influence of refrigerant type on migration | CNT#2 | R113, R141b, n-pentane | 0 | 50 | 2.0 | 0.56, 1.11, 1.65, 2.19, 2.72, 3.25, 3.77 |
Influence of oil concentration on migration | CNT#2 | R113 | 1, 5, 10 | 50 | 2.0 | 0.56, 1.11, 1.65, 2.19, 2.72, 3.25, 3.77 |
Influence of heat flux on migration | CNT#2 | R113 | 0 | 10, 20, 50, 100 | 2.0 | 0.56, 1.11, 1.65, 2.19, 2.72, 3.25, 3.77 |
Influence of initial liquid-level height on migration | CNT#2 | R113 | 0 | 50 | 1.3, 2.0 2.7, 3.4 | 0.56, 1.11, 1.65, 2.19, 2.72, 3.25, 3.77 |