A plate heat exchanger and methods of construction and use which allow the plate assemblies used in the exchanger to be easily cleaned and maintained and which allow the plate assemblies to be individually and separately removed from the exchanger for cleaning or maintenance while the exchanger remains online and while the other plate assemblies in the plate heat exchanger continue to operate.

Disclosed is a heat exchanger comprising a first flow path with an inlet, an outlet and a first surface and a second flow path with an inlet, an outlet and a second surface wherein at least one of the first surface and the second surface has a portion consisting of a shape memory alloy which has a first shape at a first temperature, a second shape at a second temperature different than the first temperature, and returns to the first shape in response to a return to the first temperature.

A thermal energy storage heat exchanger can include a core defining a plurality of airflow passages to receive an airstream therethrough. The core can be made of a composite of a phase change material shape-stabilized by a polymer. The phase change material can be structurally supported by the polymer and the phase change material can be configured to change phases to store energy from and deliver stored energy to the airstream when the airflow passes through the core.

Heat exchange element is heat exchange element where heat exchange element pieces each of which includes heat transfer plate with heat conductivity and a plurality of ribs provided on one surface of heat transfer plate are laminated to alternately form exhaust air passage and supply air passage, and exhaust air flow flowing in exhaust air passage and supply air flow flowing in supply air passage exchange heat via heat transfer plate, heat transfer plate and rib are fixed to each other by an adhesive member, rib is formed of a plurality of fiber members with heat meltability and hygroscopicity, and rib has a fiber melting layer that is formed by melting and fixing the plurality of fiber members on the surface of rib.

A heat exchanger includes a first side opposite a second side and a third side opposite a fourth side and a cold layer with an inlet at the first side of the heat exchanger, an outlet at the second side of the heat exchanger, and a cold passage extending from the inlet to the outlet. The heat exchanger also includes a hot layer with an inlet manifold at the third side of the heat exchanger extending between the first side and the second side, an outlet manifold at the fourth side of the heat exchanger opposite the inlet manifold and extending between the first side and the second side, a hot passage extending from the inlet manifold to the outlet manifold, and a tube on the first side of the heat exchanger extending from the third side to the fourth side.

A heat exchanger includes a plate with an external surface, a channel, and a nozzle. The external surface bounds an interior of the plate. The channel is disposed in the heat exchanger and passes through a portion of the interior. The nozzle is integrally disposed in the heat exchanger, extends through a portion of the external surface, and is fluidly connected to the channel. The nozzle is configured to transport a liquid from the channel, through the external surface, and to distribute the liquid onto a portion of the heat exchanger.

A plate heat exchanger and methods of construction and use which allow the plate assemblies used in the exchanger to be easily cleaned and maintained and which allow the plate assemblies to be individually and separately removed from the exchanger for cleaning or maintenance while the exchanger remains online and while the other plate assemblies in the plate heat exchanger continue to operate.

A plate for a heat exchanger, intended to be arranged in a stack of plates, includes: —a main panel having a first edge and a second edge, opposite the first edge, and at least one first fin protruding from the main panel and capable of delimiting, with the main panel and an adjacent plate, a fluid flow path, wherein the first fin extends from the first edge of the main panel towards the second edge, without extending up to the second edge, so as to provide a first fluid passage between one end of the first fin and the second transverse edge where the fluid flow path forms a first baffle.

A membrane evaporative condenser (MEC) includes a repeating sequence of channels for evaporation and/or condensation are arranged, each sequence of channels includes a condensation channel for condensation of a vapor to a liquid, an evaporation channel, and zero to one hundred evaporation-condensation channels. The condensation channel has walls of a non-permeable material which exterior to the condensation channel share the wall with a liquid evaporative medium (LEM) conduit that contains a LEM. The LEM conduit includes a moisture transfer membrane (MTM), where the LEM can evaporate into an evaporation channel or an evaporation-condensation channel that can amplify the effect of the heat transfer for additional mass transfer.

An additively manufactured heat exchanger can include a plurality of vertically built fins, and a plurality of non-horizontally built parting sheets. The plurality of vertically built fins can extend between and connect to the plurality of parting sheets. The heat exchanger can include a plurality of layers of fins and parting sheets. The heat exchanger can include first and second flow circuits for allowing separate fluid flows to flow through the heat exchanger to exchange heat therebetween.