Patent ID: 7219712
Filing Date: 2007-05-22
Classification: F02G,F28D,Y10T

Abstract:
1. For a thermal regenerative machine having a first temperature area and a second temperature area, a regenerator comprising: a first layer portion having a first thickness, a first porosity, and a first material composition; and a second layer portion adjacent the first layer, the second layer having a second thickness, a second porosity, and the first material composition, the second thickness being greater than the first thickness, the second porosity being greater than the first porosity, the regenerator configured to be positioned within the thermal regenerative machine such that the first layer portion is nearer the first temperature area than the second layer portion, the first layer portion made from a first number of sheets of random fiber material and the second layer portion made from a second number of sheets of random fiber material, the first number being smaller than the second number, the random fiber material of the first layer portion sintered a first number of times and the random fiber material of the second layer portion sintered a second number of times, the first number being greater than the second number.