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Investigations into the thermal performance of multilayer insulation (300-77 K). 1. Calorimetric studies.

Author(s) : JACOB S., KASTHURIRENGAN S., KARUNANITHI R.

Type of article: Article

Summary

The thermal performance of multilayer insulation (MLI), consisting of double aluminized Mylar radiation shields and nylon net thermal spacers, was evaluated using a double guarded cylindrical calorimeter and a tank calorimeter over the temperature range 300-77 K. The degradation in the effective thermal conductivity of MLI was evaluated to be 1.68 using the calorimeters. The optimum number of layers for the MLI was 40 to 50 at a layer density of 25 layers/cm. The temperature profile and heat flux through the MLI were obtained as a function of vacuum level for different numbers of insulation layers. The temperature of a specific layer between the cold and warm boundaries decreases with an increase in chamber pressure and vice versa.

Details

  • Original title: Investigations into the thermal performance of multilayer insulation (300-77 K). 1. Calorimetric studies.
  • Record ID : 1993-2574
  • Languages: English
  • Source: Cryogenics - vol. 32 - n. 12
  • Publication date: 1992

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