Arrangement for increasing heat transfer coefficient between a heating surface and a boiling liquid

Abstract From the Canadian patent

A single layer cover means is disposed over and spaced apart from a heating surface for directing vapor to flow along the heating surface the cover, means having openings to permit vapor to flow therethrough, the openings having an effective diameter equal to or greater than the distance between the heating surface and the cover means. The cover means induces an agitating effect across the heating surface to enhance the heat transfer performance instead of forming nucleation sites. A plurality of spacer members is disposed at intervals between the heating surface and the cover means.