A membrane heat exchanger comprising a first planar sheet and a second planar sheet coupled to the first planar sheet to form at least one fluid chamber defined by the first and second sheets and a first and second end that respectively communicate with a first and second port defined by at least one of the first and second sheet.

A collapsible heat exchanger comprising a first sheet; a second sheet on an opposing side of the collapsible heat exchanger from the first sheet; a first expansion element coupled to and extending between the first and second sheets; a second expansion element coupled to and extending between the first and second sheets; a manifold including a plurality of channels defined by at least one of a plurality of internal sidewalls; and a heat exchanger cavity defined at least by the plurality of channels and a first and second fluid conduit.

An apparatus includes a core configured for use in an energy exchanger. The core includes a plurality of stacked and spaced planar plate pairs including a top plate and a bottom plate to support fluid flow of a first fluid flow and a second fluid flow. A plurality of dimples is provided by instances of the plate pairs. The plurality of dimples are arranged to generate substantially counter current flow between the first fluid flow and the second fluid flow.

A solar power system having a heat exchanger, a heat-focusing mirror used to receive sunlight, a turbine generator, and a battery coupled to the turbine generator is provided. The heat exchanger has a first guiding channel for a first heat-exchange fluid and a second guiding channel for a second heat-exchange fluid. Sunlight is focused to the first heat-exchange fluid flow in the first guiding channel by the heat-focusing mirror. One end of the turbine generator is communicated with the outlet of the second guiding channel. The second heat-exchange fluid is suitable for driving the turbine generator to produce an electric power, and the electric power can be stored into the battery.

A method for joining a first metal part (11) with a second metal part (12), the metal parts (11,12) having a solidus temperature above 1100 QC. The method comprises: applying a melting depressant composition (14) on a surface (15) of the first metal part (11), the melting depressant composition (14) comprising a melting depressant component that comprises at least 25 wt % boron and silicon for decreasing a melting temperature of the first metal part (11); bringing (202) the second metal part (12) into contact with the melting depressant composition (14) at a contact point (16) on said surface (15); heating the first and second metal parts (11,12) to a temperature above 1100 QC; and allowing a melted metal layer (210) of the first metal component (11) to solidify, such that a joint (25) is obtained at the contact point (16). The melting depressant composition and related products are also described.

The present invention relates to a method for providing a braze alloy layered product comprising the following steps: applying at least one silicon source and at least one boron source on at least a part of a surface of a substrate, wherein the at least one boron source and the at least one silicon source are oxygen free except for inevitable amounts of contaminating oxygen, and wherein the substrate comprises a parent material having a solidus temperature above 1100 C.; heating the substrate having the applied boron source and the applied silicon source to a temperature lower than the solidus temperature of the parent material of the substrate; and cooling the substrate having the applied boron source and the applied silicon source, and obtaining the braze alloy layered product. The present invention relates further to a braze alloy layered product, a method for providing a brazed product, a method for providing a coated product, and uses of the braze alloy layered product.

Disclosed is a multi-layered composite panel. The multi-layered composite panel comprises at least two sheets of thin plates with continuous waveform patterns having the same pitch and different heights in one direction are overlapped. In the multi-layered composite panel, an adiabatic layer is formed between the overlapping thin plates, diagonal pressing portions, which divide the waveform patterns on the top and the bottom of the thin plates into the unit of triangle-patterned cell by being pressed diagonally to cross each other on the top and the bottom of the thin plates overlapping in the diagonal direction crossing the direction of the waveform patterns, are formed and an undercut portion is formed by pressing the centers of both sides connecting a groove and a ridge of each cell on the top and the bottom of the thin plates with opposite diagonal pressing portions.

A heat transfer cell includes first and second heat transfer plates which have first and second heat transfer areas, and first and second flanges bent from the first and second heat transfer areas so as to have a height difference with respect to the first and second heat transfer areas. The first and second heat transfer plates are joined into a cell body so as to be opposite to each other in a mirror image, and the cell body having a first fluid passage therein, weld lines formed along the first contacting each other and along the second flanges contacting each other, and external recesses formed outside the heat transfer areas for second fluid passages intersecting with the first fluid passage at a right angle.

A method of fabricating a vacuum insulated refrigerator structure includes injection molding a first layer of a first polymer material. A second layer of a second polymer material is injection molded over at least a portion of the first layer, and a third layer of a third polymer material is injection molded over at least a portion of the second layer to form a first component. At least one of the layers is impervious to one or more gasses. A second component is secured to the first component to form a vacuum cavity therebetween. The vacuum cavity is filled with a porous material, and the vacuum cavity is evacuated to form a vacuum. At least one of the first and third layers includes a structural reinforcement such as a rib or screw boss of increased thickness that is formed during the injection molding process.

A plate package made according to the method includes first heat exchanger plates and second heat exchanger plates. Each heat exchanger plate has a first porthole, and the port hole of at least one of the heat exchanger plates is surrounded by a peripheral rim. The first heat exchanger plates and the second heat exchanger plates, are joined to each other and arranged side by side in such a way that the peripheral rims together define an inlet channel extending through the plate package. The peripheral rim of the first and/or the second heat exchanger plates has at least one through hole, forming a fluid passage allowing a communication between the inlet channel and the first plate interspaces. The at least one through hole is made in a condition in which the first and the second heat exchanger plates have been joined to each other to form the plate package.