A refrigerator appliance , comprising: a cabinet have a first chamber and a second chamber positioned within the cabinet ; a rotating heat carrier system positioned within the cabinet , the rotating heat carrier system comprising: a barrier positioned between the first and second chambers, a shaft , a plurality of disks mounted to the shaft such that each of the plurality of disks extend along a radial direction (R) from the shaft , the plurality of disks stacked on the shaft such that each of the plurality of disks is spaced from an adjacent pair of the plurality of disks along an axial direction (A) on the shaft , and a motor coupled to the shaft , the motor operable to rotate the shaft and the plurality of disks , wherein the plurality of disks is at least partially positioned within the barrier , a first portion of each of the plurality of disks extending along the radial direction (R) into the first chamber , a second portion of each of the plurality of disks extending along the radial direction (R) into the second chamber , and wherein the plurality of disks are configured to transfer heat through the barrier when the motor rotates the plurality of disks . a cabinet have a first chamber and a second chamber positioned within the cabinet ; a rotating heat carrier system positioned within the cabinet , the rotating heat carrier system comprising: a barrier positioned between the first and second chambers, a shaft , a plurality of disks mounted to the shaft such that each of the plurality of disks extend along a radial direction (R) from the shaft , the plurality of disks stacked on the shaft such that each of the plurality of disks is spaced from an adjacent pair of the plurality of disks along an axial direction (A) on the shaft , and a motor coupled to the shaft , the motor operable to rotate the shaft and the plurality of disks , wherein the plurality of disks is at least partially positioned within the barrier , a first portion of each of the plurality of disks extending along the radial direction (R) into the first chamber , a second portion of each of the plurality of disks extending along the radial direction (R) into the second chamber , and wherein the plurality of disks are configured to transfer heat through the barrier when the motor rotates the plurality of disks . a barrier positioned between the first and second chambers, a shaft , a plurality of disks mounted to the shaft such that each of the plurality of disks extend along a radial direction (R) from the shaft , the plurality of disks stacked on the shaft such that each of the plurality of disks is spaced from an adjacent pair of the plurality of disks along an axial direction (A) on the shaft , and a motor coupled to the shaft , the motor operable to rotate the shaft and the plurality of disks , wherein the plurality of disks is at least partially positioned within the barrier , a first portion of each of the plurality of disks extending along the radial direction (R) into the first chamber , a second portion of each of the plurality of disks extending along the radial direction (R) into the second chamber , and wherein the plurality of disks are configured to transfer heat through the barrier when the motor rotates the plurality of disks . <EOS>