Attachable heat flux measuring device
AssigneeThe Babcock & Wilcox Company
InventorsMelvin John Albrecht, Scott Edward Hawk
Life of this patent
Estimating the term…
Abstract
A meter equipped with thermocouples which measure the combustion gas temperature used to calculate the heat flux at selected locations of a boiler furnace wall comprised of a series of tubes conveying pressurized water and separated by membranes. The meter extends through an opening in the membrane and is mounted on the outside of the furnace wall.
Claims19
A heat flux meter for measuring the heat flux at a location on the wall of a boiler comprising:
- a boiler wall having a plurality of pressurized water tubes connected by a plurality of membranes;
- at least one of said membranes having an opening extending therethrough;
- and
- a heat flux meter mounted in said opening from the outside of said boiler wall wherein said heat flux meter comprises a sensor portion fitting into the opening in said membrane and an attachment portion mounted to said membrane and includes a pair of spaced thermocouples extending from said attachment portion into said sensor portion to be spacedly located therein and in said membrane.
A method of calculating the heat flux at the crown of a boiler tube, the boiler tube connected to an adjacent tube with a membrane, the boiler tube, adjacent tube and membrane each having a furnace side and a casing side, comprising the steps of:
- providing a heat flux meter body having an attachment portion and a sensor portion connected to the attachment portion, the attachment portion having a back side with attachment portion openings therethrough, and the sensor portion having a sensor diameter;
- providing a membrane opening through the membrane, the membrane opening having a membrane opening diameter;
- inserting the sensor portion into the membrane opening from the casing side of the membrane;
- attaching the attachment portion to the casing side of one of the membrane, the boiler tube and the adjacent tube;
- inserting a first thermocouple into an attachment portion opening, inserting a second thermocouple into an attachment portion opening, and securing the thermocouples into place spaced a set distance apart in the sensor portion within the membrane;
- calculating a membrane heat flux at the membrane opening from temperatures obtained from the first and second thermocouples;
- and
- calculating the heat flux at the crown of the boiler tube by applying a correction to the membrane heat flux.
A heat flux meter for determining the heat flux at the crown of a boiler tube, the boiler tube connected to an adjacent tube with a membrane, the boiler tube, adjacent tube and membrane each having a furnace side and a casing side, comprising:
- a heat flux meter body having a metal cylinder connected to a bracket, the bracket for attaching the heat flux meter body to the casing side of one of the membrane, the boiler tube and the adjacent tube, the bracket having bracket openings therethrough;
- a first thermocouple inserted through a bracket opening and a second thermocouple inserted through a bracket opening, the thermocouples secured into place spaced a set distance apart in the metal cylinder;
- and
- wherein the metal cylinder is designed th locate thermocouples within the membrane in operation.
Dependencies are inferred from the claim text.