Radiant heat recovery heater, and stirling engine and combustion furnace using radiant heat recovery heater
AssigneeYanmar Co., Ltd.
InventorJiro Fukudome
Life of this patent
Estimating the term…
Abstract
A radiant heat recovery heater includes U-shaped heat transfer tubes each including a first path and a second path arranged on a mounting section. The U-shaped heat transfer tubes are housed in a container fixed to the mounting section. The first paths and the second paths of the U-shaped heat transfer tubes are arranged on the mounting section at equal intervals with a pitch angle θ. The first paths are each arranged on the mounting section at a position offset from the pitch angle θ for the associated second path by a predetermined angle α, so as not to completely overlap a projection of that second path, the projection extending from the container toward the center C of the container.
Claims18
A system comprising:
- a radiant heat recovery heater comprising:
- a mounting section;
- and
- a plurality of heat transfer tubes arranged on the mounting section and housed in a container, the plurality of heat transfer tubes configured to absorb radiant heat from the container when the container is exposed to high temperature, each heat transfer tube of the plurality of heat transfer tubes comprising a first path and a second path, wherein:
- the container has a bottom cylindrical shape and is provided such that a gap open to the atmosphere is formed between an opening rim of the container and the mounting section;
- the first paths are arranged to form an arrangement pitch circle having a first diameter, and the second paths are arranged to form an arrangement pitch circle having a second diameter, the first diameter smaller than the second diameter;
- the first paths and the second paths of the heat transfer tubes are arranged on the mounting section at equal intervals with a pitch angle;
- and
- the first paths are each arranged on the mounting section at a position offset from the pitch angle of the second paths by half the pitch angle, so as not to completely overlap a projection of that second path, the projection extending from the container toward a center of the container.
A system comprising:
- a radiant heat recovery heater comprising:
- a mounting section;
- and
- a plurality of heat transfer tubes arranged on the mounting section and housed in a container, the plurality of heat transfer tubes configured to absorb radiant heat from the container when the container is exposed to high temperature, each heat transfer tube of the plurality of heat transfer tubes comprising a first path and a second path, wherein:
- the container has a bottom cylindrical shape and is provided such that a gap open to the atmosphere is formed between an opening rim of the container and the mounting section;
- the first paths are arranged to form an arrangement pitch circle having a first diameter, and the second paths are arranged to form an arrangement pitch circle having a second diameter, the first diameter smaller than the second diameter;
- and
- the first paths of the heat transfer tubes, the second paths of the heat transfer tubes, or both of the first paths and the second paths comprise flatly or elliptically processed parts enlarged along a projection extending from the container toward a center of the container, to increase a projection area extending from the container toward the center of the container.
Dependencies are inferred from the claim text.