Abstract: An aspirating induction nozzle for vertical connection to the outlet of a pressurized exhaust gas flow comprises a central nozzle surrounded by a wind band and one or more guide vanes. Ambient air is induced into a mixing zone within the central nozzle to dilute the primary effluent and increase the volumetric discharge flow rate to achieve greater plume lift. The mixing zone within the central nozzle is protected from crosswind influences, which would otherwise diminish plume lift.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: A campfire chimney for placement over a campfire to shield nearby persons from excessive heat, smoke and burning embers. The campfire has a base comprising at least for telescoping legs to adjust the height of the chimney over the fire. The chimney has a bottom conical section for placement over the fire and a tubular top section for exhausting products of combustion. The chimney can be disassembled and can be transported conveniently by a single individual.

Abstract: A chimney, including: a chimney cylinder, and a smoke inlet. The smoke inlet is arranged on a lower part of the chimney cylinder, and includes a first side wall and a second side wall on a cross-section of the chimney cylinder. An angle ? is formed between the first side wall and a first tangent at an intersection of the first side wall and an outer wall of the chimney cylinder, and 10°???90°. An angle ? is formed between the second side wall and a second tangent at an intersection of the second side wall and the outer wall of the chimney cylinder, and 10°???90°.

Abstract: A campfire chimney for placement over a campfire to shield nearby persons from excessive heat, smoke and burning embers. The campfire has a base comprising at least for telescoping legs to adjust the height of the chimney over the fire. The chimney has a bottom conical section for placement over the fire and a tubular top section for exhausting products of combustion. The chimney can be disassembled and can be transported conveniently by a single individual.

Abstract: A tapered pipe sleeve is used to butt join tent chimney tapered pipe sections. Chimney supports tent, chimney top boiler, hanging hoop and is strong enough using low weight thin metal. Other features important to this system are; an air cooled roof jack, a chimney base to bridge across melted snow under the chimney, a cylinder shaped stove mounted vertically on the chimney, a baffle for hot cook top and to stop hot fly ash, a cone shaped stove bottom with a grate at the small end, primary and secondary draft, a bottom heat shield/ash catcher. Recycled steel cans are used for stove and boiler. Stove and chimney can be large (8 man, 8 lbs.) or small (2 man, 2 lbs) made with steel and aluminium or even less weight with titanium.

Abstract: Fan assemblies, mechanical draft systems and methods are provided. In this regard, a representative mechanical draft system for use with multiple appliances includes: a chimney operative to direct combustion products from multiple appliances; a chimney fan operative to draw combustion products from the chimney; and a controller operative to adjust an operating speed of the chimney fan such that, responsive to a change in pressure in the chimney, the controller adjusts the operating speed of the chimney fan to maintain a desired pressure in the chimney.

Abstract: A bustle for use on a flare or an exhaust stack of, for example, a landfill gas treatment system, efficiently transfers gas from the stack to a waste heat recovery system associated with the landfill gas treatment system without substantially affecting the operation of the landfill gas treatment process. The bustle enables the heat recovery system to recover at least a portion of the energy within the exhaust produced by the gas treatment system and to provide the recovered energy either indirectly or directly to a secondary process, such as a wastewater treatment process, to thereby reduce the amount of energy needed to be otherwise input into the secondary process.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: A passive ventilation stack for a room, building or the like comprises an interior space and first and second openings providing fluid communication between the interior space and a room to be ventilated, and the outside atmosphere. A control system is provided for varying the size of the openings, so as to cause natural heat exchange between relatively cool ventilation air entering the stack from outside and relatively warm air entering the stack from a room or building to be ventilated.

Abstract: Disclosed herein is a fan cylinder for a cooling tower, which is configured to prevent the air discharged from the cooling tower from flowing back thereinto. The fan cylinder is fixed to the upper side of the cooling tower, and is configured to mount a cooling fan therein. The fan cylinder comprises a linear portion having a constant inner diameter, and mounted therein with the cooling fan; an inlet portion connected at an upper end thereof to a lower end of the linear portion, and having an inner diameter increasing downwardly; an extension portion connected at a lower end thereof to an upper end of the linear portion; and having an inner diameter increasing upwardly, and an outlet portion connected to an upper end of the extension portion, and having an inner diameter decreasing upwardly.

Abstract: The fixed type ventilator according to the present invention includes: a support at the base with openings at the top and bottom; a first air current guide plate with an inclined surface with an angle of inclination of approximately 120° to 130°, which has an opening therethrough, and is coupled over the support; a second air current guide plate, with an inclined surface with an angle of inclination of approximately 120° to 130°, is coupled over the first air current guide plate with a gap of approximately 5 to 10 cm between the second air current guide plate and the inclined enclosed surface of the first air current guide plate. An air passage for the indoor air is provide through the bottom opening of the support and the gap, and natural outdoor air is allowed to flow therethrough the gap of the ventilator.

Abstract: Disclosed is a method for hindering the formation and for penetrating and breaking-up overhead atmospheric inversions, enhancing ground level air circulation and, improving urban air quality and transporting ozone to the upper atmospheres by the use of waste heat, including combustion gases, rejected to the atmosphere during power generation.