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Numerical Analysis of a Super-Insulated Pipe for the Transportation of Liquid Nitrogen (LN<sub>2</sub>)
oleh: Danish Bin Nisar, Maaz Ahmed, Ali Mohsin Hussain, Muzaffar Ali, Hafiz Sohaib Muhammad
Format: | Article |
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Diterbitkan: | MDPI AG 2023-10-01 |
Deskripsi
In this study, a super-insulated pipe incorporating Multi-Layer Insulation (MLI) and vacuum is numerically analyzed to overcome the challenges faced during the transportation of cryogenic fluids like nitrogen. A super-insulated pipe incorporating an inner process pipe of SS 304 L insulated by twenty-four consecutive layers has been used. Each layer consists of aluminized mylar (as a radiation shield) and dacron netting (as a spacer material). High vacuum (10<sup>−9</sup> torr) is applied and numerically analyzed at multiple flow rates, i.e., 250 LPH, 500 LPH and 1000 LPH. The results show a gradual increase in temperature along the flow direction from 77 K to 79 K at the most. Moreover, the temperature increases with the increase in the length of the pipe and decreases with the increase in the flow rate of LN<sub>2</sub>.