Table 1.
The chilldown efficiencies, ηCD; the percentage increase in ηCD over the base case, 0L; total LN2 consumed for chilldown process, Mcoolant; and percent reduction in LN2 consumption over the base case, 0L, for different coating layers and source pressure.
| Pin psig | 100 | 80 | 60 | 40 | 30 | Average |
|---|---|---|---|---|---|---|
| 0 L (no coating) | ||||||
| ηCD (%) | 25.57 | 24.38 | 27.21 | 25.72* | 25.72* | 25.72 |
| Mcoolant (kg) | 1.1269 | 1.1497 | 0.8938 | 1.07* | 1.07* | 1.0621 |
| 1 L coating | ||||||
| ηCD (%) | NA | 35.90 | 36.23 | 42.77 | 46.42 | 40.33 |
| Percentage increase in ηCD (%) | NA | 47.25 | 33.15 | 66.29* | 80.40* | 56.77 |
| Mcoolant (kg) | NA | 0.7673 | 0.7419 | 0.6146 | 0.5642 | 0.672 |
| Percentage reduction in Mcoolant (%) | NA | 33.26 | 16.99 | 42.6* | 47.3* | 35.04 |
| 3L coating | ||||||
| ηCD (%) | 55.17 | 45.07 | 48.88 | 62.89 | 59.77 | 54.36 |
| Percentage increase in ηCD (%) | 115.76 | 84.86 | 79.64 | 144.52* | 132.39* | 111.43 |
| Mcoolant (kg) | 0.5206 | 0.6147 | 0.5525 | 0.4192 | 0.4376 | 0.5089 |
| Percentage reduction in Mcoolant (%) | 53.80 | 46.53 | 38.19 | 60.8* | 59.1* | 51.68 |
| 4L coating | ||||||
| ηCD (%) | 45.14 | 42.20 | 45.75 | 70.87 | 50.50 | 50.89 |
| Percentage increase in ηCD (%) | 76.54 | 73.09 | 68.14 | 175.54* | 96.35* | 97.93 |
| Mcoolant (kg) | 0.6316 | 0.6555 | 0.5964 | 0.3714 | 0.5185 | 0.5547 |
| Percentage reduction in Mcoolant (%) | 43.95 | 42.99 | 33.27 | 65.2* | 51.5* | 47.38 |