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within B. P. M. Helvensteijn Remove this filter Industrial Chemistry/Chemical Engineering Remove this filter

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  1. No Access

    Chapter

    Measuring Thermal Conductivity of Insulators at Cryogenic Temperatures

    Traditionally, launch vehicles have consisted of a structure containing the vehicle engines, propellant tanks, and electronics. NASA’s next generation of space transportation vehicles is planned to utilize the...

    B. P. M. Helvensteijn, L. J. Salerno, P. R. Roach… in Advances in Cryogenic Engineering (2000)

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    Chapter

    Pressure Drop over Regenerators in Oscillating Flow

    Modeling the performance of pulse tube coolers and stirling coolers involves estimating the pressure drop over the regenerator. Such pressure drop estimates are generally based on steady flow correlations whic...

    B. P. M. Helvensteijn, A. Kashani, A. L. Spivak… in Advances in Cryogenic Engineering (1998)

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    Chapter

    Performance of a Magnetic Refrigerator Operating between 2 K and 10 K

    A prototype of an adiabatic demagnetization refrigerator (ADR) designed for space applications, operating between 2 K and 10 K, has been built and tested. The refrigerant for the ADR consists of thick slices o...

    A. Kashani, B. P. M. Helvensteijn, F. J. McCormack… in Advances in Cryogenic Engineering (1996)

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    Chapter

    Efficiency Calculations for a Magnetic Refrigerator Operating between 2 K and 10 K

    An adiabatic demagnetization refrigerator (ADR) operating between 2 K and 10 K has been built and tested. The refrigerant in the ADR is Gadolinium Gallium Garnet (GGG). Absorption of heat at 2 K and heat rejec...

    B. P. M. Helvensteijn, A. Kashani, P. Kittel in Advances in Cryogenic Engineering (1996)