A modular smoker includes a base portion having a through bore extending from a first end of the base portion to a second end of the base portion, wherein the through bore is configured to define a shelf between the first end and the second end, a top portion configured to be removably coupled with the base portion, wherein the top portion has a through bore extending from a first end of the top portion to an opposite second end of the top portion in a first direction, and a screen configured to be held on the shelf of the through bore between the first end and the second end of the base portion. The through bore of the base portion is configured to define a chamber for receiving a combustible material on the screen between the first end and the second end of the base portion, the through bore of the base portion is configured to permit a flow of smoke from the combustible material out the through bore of the base portion at the second end of the base portion, and the second end of the body member is configured to rest on a rim of a container to block the flow of air from the container where a surface of the second end of the body member contacts the rim.

Various embodiments of a vortex hybrid motor are described herein. In some embodiments, the vortex hybrid motor may include a combustion zone defined by a fuel core and/or motor housing. The combustion zone may include an upper zone and a central zone that each contribute to thrust created by the vortex hybrid motor. In some embodiments, an injection port configuration is described that includes a proximal injection port that may be controlled for modulating a delivery of an amount of oxidizer for adjusting an oxidizer-to-fuel ratio. In some embodiments, a fuel core configuration is described that provides radially varying gradients of fuel in order to achieve desired thrust profiles. In some embodiments, the fuel core may include a support structure and/or a proximal end of a nozzle of the vortex hybrid motor may extend into the fuel core.

A heating device, preferably for the combustion of biomass, in particular of pellets of biomass, in one aspect, includes a burner part and a heating part. The burner part includes a combustion chamber; a double-walled, internally hollow combustion-chamber wall, which has an upper opening leading above the combustion zone into the combustion chamber; a flue-gas duct which leads the flue gas downwards along the combustion chamber, wherein the flue-gas duct is followed by a heat-exchanger area including initially, a flat-tube flue-gas heat exchanger, then, a tertiary-air heat exchanger; a flue-gas ventilation stack, a radiant-heat exchanger located above the combustion chamber, a flue-gas flap at the upper end of the flue-gas duct, which, when open, connects the flue-gas duct to the stack. A flat-tube flue-gas heat exchanger of the heating part forms a heat-exchanger circuit with an exhaust-air heat exchanger with the same heat-transfer medium as the flat-tube flue-gas heat exchanger.

The invention relates to a wood gas boiler having a boiler wall and a boiler bottom, at least one device for supplying air and at least one grating being arranged within the boiler wall and above the boiler bottom, and wood gas being produced in a firebed from wood chips on the grating, which wood gas can be extracted and/or conducted outwards, there being in the region of the firebed a star having a plurality of arms which extend in a star shape towards the boiler wall and can each be rotated about a rotational axis running radially with respect to the central vertical axis of the star.

The invention relates to a wood gas boiler having a boiler wall and a boiler bottom, at least one device for supplying air and at least one grating being arranged within the boiler wall and above the boiler bottom, and wood gas being produced in a firebed from wood chips on the grating, which wood gas can be extracted and/or conducted outwards, there being in the region of the firebed a star having a plurality of arms which extend in a star shape towards the boiler wall and can each be rotated about a rotational axis running radially with respect to the central vertical axis of the star.

A downward mobile gasification boiler for surface gas-phase combustion and pyrolysis of biomass briquette is provided. The boiler includes a gasification combustion chamber, a gas combustion chamber, a stranding cage slag remover, a heat exchanger, a water jacket, an air duct and an air distribution system. The air duct connected with the air distribution system is arranged in the inner cavity of the wall surface of the gasification combustion chamber. The gas combustion chamber is arranged at the upper part of the gasification combustion chamber, and an air outlet is arranged, in the middle to communicate the gas combustion chamber with the gasification combustion chamber. The lower part of a port of the gasification combustion chamber is provided with a twisting cage slag remover.

Various embodiments of a vortex hybrid motor are described herein. In some embodiments, the vortex hybrid motor may include a combustion zone defined by a fuel core and/or motor housing. The combustion zone may include an upper zone and a central zone that each contribute to thrust created by the vortex hybrid motor. In some embodiments, an injection port configuration is described that includes a proximal injection port that may be controlled for modulating a delivery of an amount of oxidizer for adjusting an oxidizer-to-fuel ratio. In some embodiments, a fuel core configuration is described that provides radially varying gradients of fuel in order to achieve desired thrust profiles. In some embodiments, the fuel core may include a support structure and/or a proximal end of a nozzle of the vortex hybrid motor may extend into the fuel core.

A cooking apparatus suitable for outdoor use including a substantially ellipsoid or ovoid housing which at least partially defines a cooking area within the same. The housing is substantially formed from aluminium.

A cooking apparatus suitable for outdoor use including a substantially ellipsoid or ovoid housing which at least partially defines a cooking area within the same. The housing is substantially formed from aluminium.

Systems and methods of a pellet-fired heating include a system having a combustion chamber in which combustion gas is generated from fuel pellets. The combustion chamber includes a fuel inlet for receiving fuel pellets into the combustion chamber, an air inlet for receiving air into the combustion chamber, and a combustion gas outlet for discharging combustion gas from the combustion chamber. The system further includes a first radiator extending into a space to be heated having an internal passage in fluid communication with the combustion chamber, via the combustion gas outlet, and one or more discharge outlets for discharging the combustion gas from the internal passage into the space. A blower of the system is configured to push air into the combustion chamber via the air inlet and push the combustion gas from the combustion chamber into the internal passage of the first radiator.