Dual-channel flow boiling system with functionalized surfaces

A method of transferring heat from a heat source using a dual-channel flow boiling structure having a first fluid flow channel configured to receive a flow of a first fluid in a first direction, a second fluid flow channel configured to receive a flow of a second fluid in a second direction, and a separator condenser separating the first fluid flow channel and the second fluid flow channel, wherein opposing sides of the separator condenser define a flow surface of the first fluid flow channel and a flow surface of the second fluid flow channel, wherein one or both opposing sides of the separator condenser has a functionalized surface that includes micro-scale and nano-scale features formed by femtosecond laser surface processing (FLSP) or any other functionalization technique, wherein the first fluid flow channel has a functionalized surface other than the flow surface defined by the separator condenser that includes micro-scale and nano-scale features formed by FLSP or any other functionalization technique, the method comprising:

• positioning the dual-channel flow boiling structure proximal to a heat source such that the functionalized surface of the first fluid flow channel is located proximal to the heat source;
• flowing the first fluid in the first fluid flow channel;
• and
• simultaneously flowing the second fluid in the second fluid flow channel, wherein the second fluid received at the second fluid flow channel is maintained at a lower temperature than the first fluid received at the first fluid flow channel causing condensation on the flow surface of the separator condenser facing the first fluid flow channel.

A dual-channel flow boiling system, the system comprising:

• a dual-channel flow boiling device comprising:
• a first fluid flow channel configured to receive a flow of a first fluid in a first direction;
• a second fluid flow channel adjacent the first fluid channel and configured to receive a flow of a second fluid in a second direction;
• and
• a separator condenser separating the first fluid flow channel and the second fluid flow channel, wherein opposing sides of the separator condenser define a flow surface of the first fluid flow channel and a flow surface of the second fluid flow channel;
• wherein at least one of the opposing sides of the separator condenser has a functionalized surface that includes micro-scale and nano-scale features, or a surface of the first fluid flow channel other than the flow surface defined by the separator condenser is a functionalized surface that includes micro-scale and nano-scale features;
• and
• at least one pump configured to generate a flow of a first fluid through the first fluid flow channel from a first fluid source, and to generate a flow of a second fluid through the second fluid flow channel from a second fluid source, wherein the second fluid source is maintained at a colder temperature than the first fluid source.