A container and a method of manufacturing a container having a base portion and a sidewall which together form a partially enclosed space for holding a fluid; and a cooling element fixedly connected to the base portion, the cooling element comprising a cavity and a cooling material sealed within the cavity.

A container and a method of manufacturing a container having a base portion and a sidewall which together form a partially enclosed space for holding a fluid; and a cooling element fixedly connected to the base portion, the cooling element comprising a cavity and a cooling material sealed within the cavity.

A container and a method of manufacturing a container having a base portion and a sidewall which together form a partially enclosed space for holding a fluid; and a cooling element fixedly connected to the base portion, the cooling element comprising a cavity and a cooling material sealed within the cavity.

A perforated quartz glass tube includes a jacket tube containing a quartz glass material, a plurality of cylindrical glass tubes which are inserted into a pore region of the jacket tube along an axial direction of the jacket tube, and contain a quartz glass material having a softening point higher than a softening point of the jacket tube, and a gap member which is inserted into a gap between the cylindrical glass tubes and a gap between the jacket tube and the cylindrical glass tube, and contains a quartz glass material having a softening point lower than a softening point of the cylindrical glass tube.

This disclosure relates to a method and an apparatus for sealing a double-walled glass tube in a vacuum-tight manner, in particular a production method for manufacturing of solar collectors. By means of a vacuum chamber, inside of which a holding element is fixed and inside of which a heating conductor is arranged, an electro-conductively heating and a subsequent deforming of the double-walled glass tube can be achieved. No additional materials, such as metallic auxiliary element, solders are required. A simple installation inside the vacuum chamber is possible and a minimum vacuum feedthrough for the power supply of a heating conductor is required. The direct heat transfer onto the double walled glass tube and a resulting quick process control allows to reliably seal a double-walled glass tube of a thermal solar collector under vacuum with simple means.

This disclosure relates to a method and an apparatus for sealing a double-walled glass tube in a vacuum-tight manner, in particular a production method for manufacturing of solar collectors. By means of a vacuum chamber, inside of which a holding element is fixed and inside of which a heating conductor is arranged, an electro-conductively heating and a subsequent deforming of the double-walled glass tube can be achieved. No additional materials, such as metallic auxiliary element, solders are required. A simple installation inside the vacuum chamber is possible and a minimum vacuum feedthrough for the power supply of a heating conductor is required. The direct heat transfer onto the double walled glass tube and a resulting quick process control allows to reliably seal a double-walled glass tube of a thermal solar collector under vacuum with simple means.

A method for manufacturing an all-glass solar heat collecting tube without a tail pipe. The bottom of one end of an inner glass tube plated by a selective absorbing coating layer is rounded, the other end is connected to a first glass outer tube. The bottom of one end of a second glass outer tube is rounded and the other end is flared. The connected inner glass tube/first glass outer tube is inserted into the second glass outer tube. A gap is formed between the first glass outer tube and the second glass outer tube to serve as an air exhausting channel. The first glass outer tube is inserted into the flared opening of the second glass outer tube. The contact point between the first glass outer tube and the second glass outer tube is heated to frit seal and butt joint.

A method for manufacturing an all-glass solar heat collecting tube without a tail pipe. The bottom of one end of an inner glass tube plated by a selective absorbing coating layer is rounded, the other end is connected to a first glass outer tube. The bottom of one end of a second glass outer tube is rounded and the other end is flared. The connected inner glass tube/first glass outer tube is inserted into the second glass outer tube. A gap is formed between the first glass outer tube and the second glass outer tube to serve as an air exhausting channel. The first glass outer tube is inserted into the flared opening of the second glass outer tube. The contact point between the first glass outer tube and the second glass outer tube is heated to frit seal and butt joint.