Control system for movable heat recovery coils
AssigneeJohn T. Irish
InventorJohn T. Irish
Life of this patent
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Abstract
A method and apparatus for controlling heat recovery coils in an exhaust stack. A set of heat recovery coils at least partially filled with a heat conducting fluid is positioned in a hot zone. The recovery coils are biased in a direction out of the hot zone to prevent accidental overheating in the event of a control or power failure. A heat transduction system is connected in fluid communication with the heat recovery coils. Heat energy is transferred from the hot zone into the heat conducting fluid, and the heated heat conducting fluid is then flowed into the heat transduction system where heat is removed from the heat conducting fluid. The extracted heat is then transduced into useful energy.
Claims21
A heat recovery system, comprising:
- an exhaust stack adapted to constrain flowing hot gasses and defining a hot zone;
- a set of heat recovery coils adapted to be at least partially introduced into the hot zone;
- a chiller fluidically connected to the set of heat recovery coils;
- a heat conducting fluid at least partially filling the coils;
- a support structure positioned in the hot zone and adapted to receive the coils;
- a motor operationally connected to the set of heat recovery coils and adapted to position the coils in the hot zone;
- and
- an electronic controller operationally coupled to the motor;
- wherein the hot gasses flowing through the hot zone heat the heat conducting fluid at least partially filling the coils placed in thermal communication with the hot gasses;
- wherein the fluid at least partially filling the coils is pressurized to flow through the chillers;
- wherein the controller is adapted to control the motor to adjust the positioning of the coils in the hot zone to maintain efficient heat transfer to the heat conducting fluid;
- and
- wherein the chillers extract heat from the heat conducting fluid flowing therethrough for transduction into useful energy.
A heat recovery system, including:
- a hot zone;
- a support structure extending into the hot zone;
- at least one heat recovery coil movably connected to the support structure and variably positionable within the hot zone;
- a heat transducer in thermal communication with the at least one heat recovery coil;
- and
- a motor operationally connected to the at least one heat recovery coil and adapted to position the at least one heat recovery coil in the hot zone;
- wherein the at least one heat recovery coil is biased away from the hot zone.
A method for controlling heat recovery coils in an exhaust stack, comprising the steps of:
- providing at least one heat recovery coil at least partially filled with a heat conducting fluid and movable into and out of a hot zone of the exhaust stack;
- biasing the at least one heat recovery coil in a direction out of the hot zone;
- providing a heat transduction system in fluid communication with the at least one heat recovery coil;
- and
- positioning the at least one heat recovery coil in the hot zone.
Dependencies are inferred from the claim text.