High efficiency combustion heater

Patent · Tue Feb 02 04:00:00 EST 1988

OSTI ID:5275708

Varney, F M; Varney, J A

A high-efficiency stove is described comprising: an outer tubular shell surrounding an inner tubular shell of heat conductive material. Each shell having an upper rim and a lower rim. The shells define an air intake flue open between the upper rims for admitting atmospheric air, means for closing the lower end of the outer shell to define a combustion zone above the means for closing. The combustion zone is in communication with the intake flue, and container means supported at least partly within the inner shell and defining therewith an annular exhaust flue for hot combustion gases rising from the combustion zone. The inner shell forms a wall common to both the intake and exhaust flues such that intake air drawn downwardly into the intake flue is preheated by transfer of heat through the inner shell from hot gases escaping through the exhaust flue for improved combustion of fuel in the combustion zone; and variable draft control means for adjustably controlling the flow of intake air reaching the combustion zone through the intake flue.

• Assignee: NOV; NOV-88-004078; EDB-88-079797
• Patent Number(s): US 4722322
• OSTI ID: 5275708
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR FLOW
APPLIANCES
COMBUSTION CONTROL
CONTROL
CONTROL EQUIPMENT
DESIGN
DRAFT CONTROL SYSTEMS
EFFICIENCY
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GAS FLOW
INTAKE STRUCTURES
MATERIALS
MECHANICAL STRUCTURES
PHASE CHANGE MATERIALS
PHYSICAL PROPERTIES
STOVES
THERMAL CONDUCTIVITY
THERMAL EFFICIENCY
THERMODYNAMIC PROPERTIES