A heat exchanger includes front and back walls forming a flue gas space such that a fluid flowing through a channel formed in the front and back walls can exchange heat with flue gas in the flue gas space, in use. The front wall includes a lower portion extending along the back wall, and an upper portion extending upwardly from an upper end of the lower portion and outwardly away from the back wall to form a combustion space of a flammable gas between the upper portion and the back wall. A length of the upper portion along a longitudinal direction thereof is longer than a length of the lower portion along a longitudinal direction thereof.

A heatsink comprising a heat exchange device having a plurality of heat exchange elements each having a surface boundary with respect to a heat transfer fluid, having successive elements or regions having varying size scales. According to one embodiment, an accumulation of dust or particles on a surface of the heatsink is reduced by a removal mechanism. The mechanism can be thermal pyrolysis, vibration, blowing, etc. In the case of vibration, adverse effects on the system to be cooled may be minimized by an active or passive vibration suppression system.

A heat exchange system includes a heat exchange main unit having a gas channel and a fluid channel configured such that a fluid in the fluid channel can exchange heat with a flue gas in the gas channel, a housing, a drain collecting part arranged to collect condensate from the flue gas, and a siphon detachably attached to the drain collecting part to prevent release of the flue gas from a condensate outlet formed in the siphon. The siphon has a tubular body, a condensate inlet formed on one end side, and the condensate outlet formed on an other end side. The tubular body has an attaching part to detachably attach the tubular body to the drain collecting part through a hole formed within a wall of the housing, and a grip located outside the housing when the tubular body is attached to the drain collecting part.

A heatsink comprising a heat exchange device having a plurality of heat exchange elements each having a surface boundary with respect to a heat transfer fluid, having successive elements or regions having varying size scales. According to one embodiment, an accumulation of dust or particles on a surface of the heatsink is reduced by a removal mechanism. The mechanism can be thermal pyrolysis, vibration, blowing, etc. In the case of vibration, adverse effects on the system to be cooled may be minimized by an active or passive vibration suppression system.

A heat exchange system includes a heat exchange main unit having a gas channel and a fluid channel configured such that a fluid in the fluid channel can exchange heat with a flue gas in the gas channel, a housing, a drain collecting part arranged to collect condensate from the flue gas, and a siphon detachably attached to the drain collecting part to prevent release of the flue gas from a condensate outlet formed in the siphon. The siphon has a tubular body, a condensate inlet formed on one end side, and the condensate outlet formed on an other end side. The tubular body has an attaching part to detachably attach the tubular body to the drain collecting part through a hole formed within a wall of the housing, and a grip located outside the housing when the tubular body is attached to the drain collecting part.

A counter-flow heat exchanger including a core region and a plenum region. The core region including a first set of heat exchanging passageways and a second set of heat exchanging passageways disposed at least partially therein. A plenum region is disposed adjacent opposed distal ends of the core region. Each of the plenum regions including a fluid inlet plenum, a fluid outlet plenum and a tube plate disposed therebetween. The first set of heat exchanging passageways is truncated and defines a first tube-side fluid flow path in a first direction. The second set of heat exchanging passageways defines a second tube-side fluid flow path in a second opposing direction. Each of the heat exchanging passageways extending from a fluid inlet plenum to a fluid outlet plenum. The tube plates and the core region include one of a cast metal formed thereabout each of the heat exchanging passageways or a braze bond formed between each of the heat exchanging passageways.

A power module according to various aspects of the present disclosure includes a housing and a thermally-conductive element. The housing includes a polymer. The housing at least partially defines a channel. The channel is configured to receive a fluid. The thermally-conductive element is disposed at least partially within the housing. The thermally-conductive element is in fluid communication with the channel. The thermally-conductive element includes a thermally-conductive material. The thermally-conductive element is in thermal communication with the channel and a heat source. In certain aspects, includes at least one of a protrusion, a pin, and sheath. A method of manufacturing a channel having a thermally-conductive element for heat transfer includes (a) forming a channel, (b) forming a housing, and (c) removing a sacrificial material.

A laminated photovoltaic thermal (PV/T) module for a PV/T hybrid solar collector comprising a cooler/absorber and a photovoltaic unit. The cooler/absorber includes at least one flat surface with raised peripheral edges and is adapted to function as a mould for a photovoltaic laminate structure. The photovoltaic unit includes a photovoltaic laminate structure including: a first layer of a first laminate material moulded on the flat surface of the cooler/absorber, wherein the first laminate material is electrically insulating and has a high thermal conductivity; a plurality of photovoltaic cells positioned on the first layer of laminate material; and a second layer of a second laminate material moulded on and substantially covering the photovoltaic cells, wherein the second laminate material is transparent and has a high heat resistance.

A counter-flow heat exchanger including a core region and a plenum region. The core region including a first set of heat exchanging passageways and a second set of heat exchanging passageways disposed at least partially therein. A plenum region is disposed adjacent opposed distal ends of the core region. Each of the plenum regions including a fluid inlet plenum, a fluid outlet plenum and a tube plate disposed therebetween. The first set of heat exchanging passageways is truncated and defines a first tube-side fluid flow path in a first direction. The second set of heat exchanging passageways defines a second tube-side fluid flow path in a second opposing direction. Each of the heat exchanging passageways extending from a fluid inlet plenum to a fluid outlet plenum. The tube plates and the core region include one of a cast metal formed thereabout each of the heat exchanging passageways or a braze bond formed between each of the heat exchanging passageways.

A housing assembly and a method of manufacturing the housing assembly. The housing assembly includes a trap portion and a heat transfer portion. A first plate member of the heat transfer portion has one or more first and second flanges having a length L1 and L2. A second plate member of the heat transfer portion has one or more first and second flanges having a length L3 and L4 that are larger than the lengths L1 and L2. At least a portion of the one or more first and second flanges of the first plate member are integrally connected to at least a portion of said one or more first and second flanges of said second plate member. Additionally, at least a portion of the one or more first and second flanges of the second plate member are overmoulded within the tray portion of the housing assembly.