Patent ID: 6739137
Filing Date: 2004-05-25
Classification: B64D,F01K,F25B,H01F,Y02B

Abstract:
A method for generating a low temperature heat sink for absorbing thermal energy at sub-ambient temperature comprising the steps of:isothermally magnetizing a paramagnetic fluid in the liquid or gaseous state at an initial temperature below ambient temperature of the natural environment thereby lowering the entropy of said paramagnetic substance; demagnetizing said paramagnetic fluid at said initial sub-ambient temperature by turning off said magnetic field thereby achieving a temperature drop in said paramagnetic fluid to a temperature below said initial sub-ambient temperature due to the magentocaloric effect enabling said paramagnetic fluid to absorb heat at sub-ambient temperature; and repeating said isothermal magnetizing and demagnetizing steps thereby enabling said paramagnetic fluid to continuously absorb thermal energy below ambient temperature.