Heat Storage Device with Heat-Radiative Coating

Abstract

Taught herein is a heat retainer for a heat exchanger the retainer having a coating layer. At least one surface of the heat retainer is coated with a highly-radiative material forming a coating layer whose emissivity is greater than that of a substrate material of which the core of the heat retainer is made. The heat retainer is in the shape of a honeycomb, a fin, a ball, an ellipse or a plate, and one or a plurality of inner holes are disposed therein. The substrate of which the heat retainer is made is a refractory material, a ceramic material or a steel material. The heat retainer has comparatively good heat absorption and emission performance; heat storage capacity is increased, diathermancy is improved, and energy is saved.

1 . A heat retainer for a heat exchanger the heat retainer having a coating layer, wherein at least one surface of said heat retainer is coated with a highly-radiative material forming said coating layer. 
   
   
       2 . The heat retainer of  claim 1 , wherein a thickness of said coating layer is 0.02-3 mm. 
   
   
       3 . The heat retainer of  claim 1 , wherein an emissivity of said highly-radiative material is greater than that of a substrate material of which the heat retainer is made. 
   
   
       4 . The heat retainer of  claim 1 , wherein the heat retainer is in the shape of a honeycomb, a fin, a ball, an ellipse or a plate. 
   
   
       5 . The heat retainer of  claim 1 , comprising one or a plurality of inner holes disposed within said heat retainer. 
   
   
       6 . The heat retainer of  claim 5 , wherein the inner hole may be circular, square, rectangular, rhombic, hexagonal or polygonal. 
   
   
       7 . The heat retainer of  claim 1 , wherein a cross section of the heat retainer is circular, square, rectangular, rhombic, hexagonal or polygonal. 
   
   
       8 . The heat retainer of  claim 1 , prepared by coating surfaces of the substrate of the heat retainer with a pre-treating liquid and then paste-coating, spray-coating or dip-coated with the highly-radiative material to form a coating layer, wherein the pre-treating liquid is an aqueous solution of the polyamine curing agent PA80 or an alkali metal silicate. 
   
   
       9 . The heat retainer of  claim 1 , wherein the substrate of the heat retainer is made of a refractory material, a ceramic material, an iron and a steel material.