Abstract: A combustion, heat-exchange and emitter device (10) for converting chemicals into electro-magnetic radiation and a corresponding method. The device (10) includes a radiation emission section (A) with a selective emitter (1.3) configured for emitting predominantly near-infrared radiation when heated up to high temperatures. A conversion section (B) is arranged adjacent to the radiation emission section (A) and includes a catalytic coating in order to provide for surface specific fuel combustion to maximize heat transfer between a thermal energy carrier (fuel) and the radiation emission section (A). A heat recovery section (F) is configured to transfer excess heat of the thermal energy carrier from an exhaust outlet section (G) to an inlet section (E) to pre-heat the thermal energy carrier (fuel) entering the device (10) therethrough.

Abstract: An energy conversion and transfer arrangement (10) including a spectral shaper (3) with an input surface (3.X) defining a flow-through heat transfer area (X) and an electro-magnetic radiation emitter (2) arranged within the flow-through heat transfer area (X) to allow for surface specific fuel combustion processes such as catalytic conversion which heat up the emitter to high temperatures. The electro-magnetic radiation emitter (2) is configured for emitting predominantly near-infrared radiation when exposed to high temperature. The spectral shaper (3) is configured as a band pass filter for a first, optimal spectral band of the radiation emitted by the electro-magnetic radiation emitter (2) when exposed to high temperature and/or as a reflector for further, non-optimal spectral band(s) of the radiation emitted by the electro-magnetic radiation emitter (2), so that the second, non-optimal spectral band radiation is recycled as radiation redirected towards the electro-magnetic radiation emitter (2).

Abstract: A multilayer structure (10) for thermophotovoltaic devices, comprising a heat transfer-emitter unit (2) and a spectral shaper (3). The heat transfer-emitter unit (2) comprising a chamber enclosure (2.1) made of a high temperature resistant material, defining a flow-through heat transfer chamber (2.2); an electro-magnetic radiation emitter (2.3) configured for emitting predominantly near-infrared radiation when exposed to high temperatures. The spectral shaper (3) is arranged adjacent to and thermally connected with said electro-magnetic radiation emitter (2.3), wherein the spectral shaper (3) is configured as a band pass filter for an optimal spectral band of the radiation and as a reflector for further, non-optimal spectral band(s) of the radiation, so that said second, non-optimal spectral band radiation is recycled as radiation redirected towards the electro-magnetic radiation emitter (2.3).

Abstract: The air to be supplied to a room is brought to a desired temperature and a desired humidity through the following process steps: making outside air flow as a first air stream through a first line (20) and making a first portion of exhaust air coming from the room flow as a second air stream through a second line (21), wherein moisture is exchanged between the first air stream and the second air stream by means of a device for exchanging humidity, condensing, by means of a dehumidifying and cooling device (19), moisture in the form of water from the first air stream and/or from the second air stream and/or inside the device for exchanging humidity, and making a second portion of the exhaust air flow as a third air stream through another line (32) comprising another dehumidifying and cooling device (33) and returning said second portion back to the room, wherein in the other dehumidifying and cooling device (33) moisture is condensed from the third air stream in the form of water.

Abstract: A device for dehumidifying an air stream includes at least one first module including at least one Peltier element and at least one second module including at least one Peltier element. The entirety of the first module forms a first zone for cooling the air stream. The entirety of the second module forms a second zone for dehumidifying the air stream. The entirety of the first and the second modules forms an air channel for the air stream. A water discharge channel is disposed below the entirety of the second module and receives water accumulating during the dehumidifying of the air stream in the second zone. At least one sensor for measuring a temperature and/or a moisture of the air stream provides at least one output signal. A control unit including at least one controller controls the Peltier elements based on the at least one output signal of the at least one sensor.

Abstract: The optical waveguide coupler comprises a structure (1) of a number of elongated narrow optical waveguide strips (2), which consist respectively of a front area (3), a center area (4) and a coupling area (5). The center area (4) has respective transition areas (6) and (7) to the corresponding area (3) or (5). A gap (9) in the front areas (3) provided between two adjoining strips (2) is larger than the thickness of the narrow strips (2). The front faces (8) of the front areas (3), and the front faces of the coupling areas (5) are embodied to be as smooth as possible, wherein all strips form a stack in the coupling area (5). The gaps are pits which result from etching of an Si substrate with the aid of a DRIE etching process.

Abstract: The optical waveguide coupler comprises a structure (1) of a number of elongated narrow optical waveguide strips (2), which consist respectively of a front area (3), a center area (4) and a coupling area (5). The center area (4) has respective transition areas (6) and (7) to the corresponding area (3) or (5). A gap (9) in the front areas (3) provided between two adjoining strips (2) is larger than the thickness of the narrow strips (2). The front faces (8) of the front areas (3), and the front faces of the coupling areas (5) are embodied to be as smooth as possible, wherein all strips form a stack in the coupling area (5). The gaps are pits which result from etching of an Si substrate with the aid of a DRIE etching process.