Speaker
Description
Multi-layer insulation (MLI) is a passive insulation technology, which is known as "super insulation" due to its excellent insulation performance in cryogenics engineering field. The traditional multi-layer insulated reflective layer often uses a single aluminum metal coating, ignoring the influence of temperature change on the metal emissivity. On this basis, this paper proposes a variable metal coating MLI (VM-MLI) using aluminum, gold and copper as reflective layer materials. In this research, the layer-to-layer model is employed to theoretically analyze the performance of VM-MLI. The total heat leakage of the MLI and the VM-MLI under the same conditions are calculated, and the effects of layer density, spacer layer material, air pressure and thermal boundary temperature on the total heat leakage of the VM-MLI are analyzed. The calculation results show that the VM-MLI can significantly reduce the total heat leakage, and the thermal insulation performance of the newly designed insulation structure is about 55% higher than that of the traditional single aluminum metal coating MLI.
| Submitters Country | P. R. China |
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