High efficiency radiant heater
AssigneeReznor LLC
InventorsGlyn Wilfred Turner, Lee Brian Herbert
Life of this patent
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Abstract
A radiant tube heater with a burner assembly, a radiant tube assembly and a combustion air pre-heater, wherein the burner assembly comprises: a burner fuel nozzle; a plenum chamber and a pre-mixer chamber; the plenum chamber having a combustion air inlet; wherein in use: combustion air flows from said plenum chamber through an orifice to said pre-mixer where said air, is mixed with burner fuel entering said pre-mixer through said nozzle prior to being combusted at a burner head; said pre-mixer being at least partly located within said radiant tube assembly; and where in use at least part of the combustion air supplied to said plenum is preheated in said air pre-heater using residual sensible heat of the hot combustion gas products of the heater.
Claims3
A radiant tube heater comprising a burner assembly, a radiant tube assembly and a combustion air pre-heater;
- wherein in use at least part of the combustion air supplied to the heater is preheated in said air pre-heater using the residual sensible heat of hot combustion gas produced by the heater;
- and wherein the air pre-heater comprises:
- a heat exchanger block having a first and second array of ducts arranged side by side, such that each array is contacted with hot combustion gas products at the same temperature, and held in place by end plate members;
- said heat exchanger block being arranged so that combustion air is preheated by passing inside and through the first array of ducts before turning and being further preheated by flowing in an opposite direction inside and through the second array of ducts;
- and
- where hot combustion gas products are cooled by passing in cross flow through a single enclosure, located between said end plate members.
Dependencies are inferred from the claim text.