Abstract: The invention relates to a channel element for a ventilation system. The channel element has a first opening (O1), a second opening (O2), and a channel wall which extends between the openings and surrounds a channel section. The channel element has a tubular section (25) and a thermally insulating envelope section (20) which is paired with the tubular section and envelopes same at least in sub-regions. The invention further relates to a channel element system made of individual channel elements which are connected together in series and a building envelope which contains such a channel element system.

Abstract: The invention relates to a channel element for a ventilation system. The channel element has a first opening (O1), a second opening (O2), and a channel wall which extends between the openings and surrounds a channel section. The channel element has a tubular section (25) and a thermally insulating envelope section (20) which is paired with the tubular section and envelopes same at least in sub-regions. The invention further relates to a channel element system made of individual channel elements which are connected together in series and a building envelope which contains such a channel element system.

Abstract: A method for the production of a microcapsule, in particular a microcapsule of spherical shape having a hollow capsule space therein, includes the steps of: a) preparing of a suspension of particulate cementitious material in a solvent b) preparing a dispersion by mixing the suspension of step a) with an immiscible fluid so that (i) the suspension is present as a dispersed phase in the fluid as a dispersion medium or that (ii) the fluid is present as the dispersed phase in the suspension as the dispersion medium, such that the particulate material of the suspension adsorbs at least partially at a phase boundary between the fluid and the suspension, and c) allowing the particulate material adsorbed at the phase boundary to hydrate with the formation of a microcapsule.

Abstract: A method for the production of a microcapsule, in particular a microcapsule of spherical shape having a hollow capsule space therein, includes the steps of: a) preparing of a suspension of particulate cementitious material in a solvent b) preparing a dispersion by mixing the suspension of step a) with an immiscible fluid so that (i) the suspension is present as a dispersed phase in the fluid as a dispersion medium or that (ii) the fluid is present as the dispersed phase in the suspension as the dispersion medium, such that the particulate material of the suspension adsorbs at least partially at a phase boundary between the fluid and the suspension, and c) allowing the particulate material adsorbed at the phase boundary to hydrate with the formation of a microcapsule.

Abstract: A microcapsule, in particular of spherical shape, having a hollow capsule core encased by a capsule shell, characterized in that the capsule shell is at least partially made of hydrated cementitious material. A method for the production of a microcapsule includes the steps of: a) preparing of a suspension of particulate cementitious material in a solvent b) preparing a dispersion by mixing the suspension of step a) with an immiscible fluid so that (i) the suspension is present as a dispersed phase in the fluid as a dispersion medium or that (ii) the fluid is present as the dispersed phase in the suspension as the dispersion medium, such that the particulate material of the suspension adsorbs at least partially at a phase boundary between the fluid and the suspension, and c) allowing the particulate material adsorbed at the phase boundary to hydrate with the formation of an individual microcapsule.

Abstract: A microcapsule, in particular of spherical shape, having a hollow capsule core encased by a capsule shell, characterized in that the capsule shell is at least partially made of hydrated cementitious material. A method for the production of a microcapsule includes the steps of: a) preparing of a suspension of particulate cementitious material in a solvent b) preparing a dispersion by mixing the suspension of step a) with an immiscible fluid so that (i) the suspension is present as a dispersed phase in the fluid as a dispersion medium or that (ii) the fluid is present as the dispersed phase in the suspension as the dispersion medium, such that the particulate material of the suspension adsorbs at least partially at a phase boundary between the fluid and the suspension, and c) allowing the particulate material adsorbed at the phase boundary to hydrate with the formation of an individual microcapsule.

Abstract: An electrical circuit and method for switching an input voltage onto a load by way of an AC control voltage is provided. A voltage magnitude reduction circuit is configured to be driven by the AC control voltage. A rectifier circuit is operably coupled with the voltage magnitude reduction circuit. Also, a voltage limiter circuit is operably coupled with the rectifier circuit, and an energy storage circuit is operably coupled with the voltage limiter circuit. The voltage magnitude reduction circuit, the rectifier circuit, the energy storage circuit and the voltage limiter circuit cooperatively generate a switch control voltage. An electronic switching unit is then configured to switch the input voltage across the load when the switch control voltage is active. In one embodiment, the input voltage is a DC voltage generated by an AC-to-DC voltage converter circuit configured to convert an AC supply voltage to the DC voltage.