An evacuated tube boiler comprised of one or more evacuated tubes and a header, operatively connected to form a common internal volume. The internal volume further containing a first heating fluid. A conduit system conducting a second heating fluid through the header and first heating fluid. One or more artificial light sources in proximity to the evacuated tubes. In operation, the artificial light sources radiate light and/or thermal energy to the evacuated tubes whereby the first heating fluid is efficiently heated. The conduit system conducts the second heating fluid through the header and first heating fluid, whereby heat from the first heating fluid is transferred to the second heating fluid. The conduit system conducts the second heating fluid to the point of use. The apparatus may be used in a hydronic boiler heating system for heating a dwelling.

A flow though heater device comprising a fluid tube carrying a fluid to be heated, a tubular heating element extending at least partially parallel and in thermal contact with the fluid tube, wherein the tubular heating element comprises a profiled casing tube and at least one heating coil mounted in a tubular portion of said profiled casing tube. The profiled casing tube further comprises at least one tab portion laterally protruding from the tubular portion and being wrapped around the fluid tube, wherein the assembly of the fluid tube and the tubular heating element has an approximately helical shape so that the tubular portion of the casing tube is positioned with respect to the helix radially inside of the fluid tube.

A circulation heater is provided which uses a cast body, having resistance heating elements therein and also having spirally wound Teflon tubing wrapped about the heater body. The heater body is formed of cast aluminum or other suitable cast material and after casting is machined to form at least one spiral channel for receiving the heater tube therein. The heater tube is pressed into the tubing channel as the heater tube is progressively wound spirally about the heater body. The channel is formed with an undercut profile wherein the channel is undercut to form a narrower mouth which allows the heater tube to be compressed and then snapped into the channel. The profile of this channel insures direct contact between the tubing and the channel wall over greater than 180 degrees or more than one half of the tube circumference to increase the area of surface contact between the heater tube and channel surface.

A flow-through fluid heater comprises: a high thermal conductivity conduit-defining body shaped to provide a conduit that extends between an inlet port and an outlet port; one or more heating elements connected to the body for providing heat to the body, thereby permitting the body to provide heat to fluid flowing through the conduit; a temperature sensor connected to sense a measured temperature indicative of a temperature of the fluid in a vicinity of the temperature sensor; one or more flow rate sensors for sensing a measured flow rate of the fluid through the conduit; and a controller connected to receive signals from the temperature sensor and the flow rate sensors, the controller configured to control an amount of heat energy imparted to the fluid during a period that the fluid is resident in the conduit between the inlet port and the outlet port based at least in part on the measured temperature and the measured flow rate.

A heating device (1), in particular a flow through heater, for a machine for preparing hot beverages, the heating device (1) comprising a metal body (2) made of aluminum or aluminum alloy; at least one electric heater (3) arranged in the metal body (2); a conduit (4) for the passage of an edible liquid to be heated, in particular water, delimited by a first inner surface (21) of the metal body (2); wherein the metal body (2) comprises a first end portion (24a) and a second end portion (24b) which delimit an initial stretch and a final stretch, respectively, of said conduit (4); wherein the first end portion (24a) and the second end portion (24b) have a respective outer surface (241a, 241b) and are adapted to be inserted into a respective tube (9); wherein said first inner surface (21), the outer surface (241a) of said first end portion (24a) and the outer surface (241b) of said second end portion (24b) are coated with a respective coating layer, in particular suitable for food contact.

A vaporizer includes: a liquid-material supply unit that supplies a liquid material for semiconductor manufacturing; a vaporization having therein a vaporization space for vaporizing the supplied liquid material; and a material-gas discharge unit that feeds a material gas obtained through vaporization to a following step. The vaporization unit includes: a vaporizer body; transparent spheres; a heater; and a reflective member.

Heating device for a machine for dispensing hot beverages, configured to heat a first and a second fluid flow which are distinct. This heating device comprises: a main body defining a heating chamber; a supply duct extending in the heating chamber along an axial direction and provided with a plurality of supply openings distributed along the axial direction, said supply duct is configured to supply in the heating chamber a heating flow radially to the axial direction through the supply openings; a first tubular circuit, configured to convey the first fluid flow to be heated, provided with a first helical section extending in the heating chamber around the axial direction creating first coils surrounding the supply duct; a second tubular circuit, configured to convey the second fluid flow to be heated, provided with a second helical section extending in the heating chamber around the axial direction creating second coils surrounding the supply duct, wherein the second helical section is coaxial with the first helical section, and the first and second coils are alternated along the axial direction.

In one embodiment, an apparatus includes a first module and a second module. The first module includes a first receptacle and a second receptacle, the first receptacle being configured to contain a liquid and a second receptacle being configured to contain coffee beans. The first module further includes a heating arrangement, the heating arrangement being at least partially positioned between the first receptacle and the second receptacle. The second module is configured to support the first module and to provide power to the heating arrangement when the first module is supported on the second module.