Abstract:
Ein Wärmeübertragungsrohr (2), insbesondere Flossenrohr, für einen luftbeheizten Verdampfer (1) zum Anwärmen und/oder Verdampfen von kryogenen Flüssigkeiten, mit einem Rohrabschnitt (8) und einer außenseitig an dem Rohrabschnitt (8) vorgesehenen Beschichtung (15), die einen hydrophilen Anteil (16) und einen hydrophoben Anteil (17) aufweist, wobei der hydrophile Anteil (16) in der Beschichtung (15) von dem hydrophoben Anteil (16) umfänglich eingeschlossene Keimstellen (18) zur Kondensation von Luftfeuchtigkeit an denselben bildet und wobei die Keimstellen (18) eine Größe von weniger als 100 nm aufweisen.
Abstract:
An indirect evaporative cooler core is manufactured from a continuous sheet of hydrophobic material. Flocking is provided on at least a partial surface area of at least one side of the sheet, to render the flocked surface area wettable. Air flow guiding structures are formed upon at least one of the first side and the second side of the sheet. Fold lines are defined in the sheet defining plates extending between adjacent fold lines. Slits are formed along the fold lines. Accordion pleating the sheet at the fold lines forms alternating wet and dry passages between the plates, the wet passages formed between opposing wettable surfaces, the dry passages formed between non- flocked surfaces, and the accordion pleating causes the slits in the folds to open and form air inlets and outlets in communication with the air flow passages.
Abstract:
A thermal ground plane (TGP) is disclosed. A TGP may include a first planar substrate member configured to enclose a working fluid; a second planar substrate member configured to enclose the working fluid; a plurality of wicking structures disposed on the first planar substrate; and one or more planar spacers disposed on the second planar substrate. The first planar substrate and the second planar substrate are may be hermetically sealed.
Abstract:
Various methods and systems are provided for cryogenic heat transfer by nanoporous surfaces. In one embodiment, among others, a system includes a cryogenic fluid in a flow path of the system; and a system component in the flow path that includes a nanoporous surface layer in contact with the cryogenic fluid. In another embodiment, a method includes providing a cryogenic fluid; and initiating chilldown of a cryogenic system by directing the cryogenic fluid across a nanoporous surface layer disposed on a surface of a system component.
Abstract:
Die Erfindung betrifft eine Verdampfereinrichtung (1) für eine Klimaanlage, mit wenigstens einer Leitungswand (3) aus einem Metall, insbesondere aus Aluminium, mit einer auf der Leitungswand (3) vorgesehenen Schutzschicht (5), welche 40-90 Massen-% Zinkoxid (ZnO) aufweist.
Abstract:
A convector for air cooling of a fluid flowing in a pipe, comprising: - a path for a cooling air flow comprising an inlet from and an outlet towards the environment, - a heat exchange section comprising at Ieast one tube bundle defining a heat exchange surface, said section being provided in said path for the air flow, - fan means producing said air flow along said path, so that said air flow externally invests said tube bundle on said; heat exchange surface, - a humidifying section arranged in said path, upstream of said heat exchange section, where water is atomized to be invested by the air flow, characterized by comprising a wetting device for wetting directly with water a portion of the heat exchange surface of said tube bundle to further cool said portion of tube bundle.
Abstract:
A heat and mass exchanger system is described. The heat and mass exchange system can include a plurality of exchange components extending across a heat and mass exchanger (HMX) duct, where a flow through the HMX duct is cross-flow relative to said exchange components. The exchange components can include a plurality of first elongated, hollow conduits and a plurality of second elongated, hollow conduit, where either the first elongated, hollow conduits or the second elongated, hollow conduits have water vapor permeabie exterior walls, and a carrier air stream and a liquid desiccant stream flow in contact with opposite sides of the water vapor permeable exterior walls.
Abstract:
A liquid desiccant regeneration system and method of liquid desiccant regeneration are described. The liquid desiccant regeneration system includes a liquid desiccant regenerator having an engine producing a heated exit stream, and at least one dehydrating tube comprising a first water vapor permeable wall. A low concentration liquid desiccant stream feeds into the liquid desiccant regenerator, while a high concentration liquid desiccant stream exiting the liquid desiccant regenerator. A carrier stream and the low concentration liquid desiccant are in contact with opposite sides of the first water vapor permeable wall, and the low concentration liquid desiccant stream is heated by heat from the heated exit stream to drive water from the low concentration liquid desiccant stream through the first water vapor permeable wall to the carrier stream to form a humidified carrier stream. As a result, the desiccant concentration in the high concentration liquid desiccant stream is higher than a desiccant concentration in the low concentration liquid desiccant stream.