Patent ID: 9163880
Filing Date: 2015-10-20
Classification: F28D,F28F

Abstract:
1. A finless heat exchanger that is configured to cool or heat a heat exchanging fluid through heat exchange between the heat exchanging fluid and a heat exchanged fluid, the heat exchanger comprising: a plurality of heat exchanging tubes, which are made of a thermally conducting material, formed as hollow tubes of a flattened cross section, and arranged in parallel with one another, such that heat exchange occurs between the heat exchanging fluid flowing inside the heat exchanging tubes and the heat exchanged fluid flowing between the heat exchanging tubes, a fluid flow direction of the heat exchanging fluid being substantially perpendicular to a fluid flow direction of the heat exchanged fluid; wherein: where ‘W’ denotes the preset interval of the folding lines and ‘z’ denotes a wavelength of a waveform including one wave crest from the line of sequential wave crests and one wave trough from the line of sequential wave troughs.