A conductive honeycomb structure that is divided into four equal portions in a flow path direction of cells in the structure to form four regions of A, B, C, and D from a side closer to a first end face, and an average value of electric resistances measured between two points in each of the four regions is represented as R.sub.A, R.sub.B, R.sub.C, and R.sub.D in this order from the side closer to the first end face. A relational expression of R.sub.A≤R.sub.B≤R.sub.C≤R.sub.D (excluding R.sub.A=R.sub.B=R.sub.C=R.sub.D) is satisfied provided that the two points being determined so that a distance between a pair of electrode layers arranged on an outer peripheral side wall of the structure is the longest in the cross section perpendicular to the flow path direction of the cells.

A burner assembly is disclosed including a burner head for generating heat via an electrical heating element and an annular burner head surrounding the burner head for generating heat via the burning of a gas/air mixture. The burner head may be used for simmering with the electrical heating element including a silicon nitride element for generating the low heat required for simmering. The annular burner head may be used for generating more heat than the burner head.

A honeycomb structure 20 according to the present invention includes: a honeycomb structure portion 10 including: an outer peripheral wall 12; a partition wall 13 arranged on an inner side of the outer peripheral wall 12, the partition wall 13 defining a plurality of cells 16 each extending from one end face to other end face to form a flow path; and a pair of electrode layers 14a, 14b arranged on a surface of the outer peripheral wall 12 of the honeycomb structure portion 10, the pair of electrode layers 14 being provided so as to face each other across a central axis of the honeycomb structure portion 10. The honeycomb structure portion 10 is made of ceramics having an NTC property, and the pair of electrode layers are made of a material having a PTC property.

A ceramic heating resistor to be arranged in a tubular element of an electrical heating element for heating a fluid, preferably air, wherein the heating resistor can be produced by sintering a green body comprising at least one ceramic raw material. The heating resistor includes an electrically insulating component and an electrically conducting component, and the electrically insulating component forms a matrix in which the electrically conducting component is accommodated. An electrical heating element for heating a fluid, preferably air, including at least one tubular element, through which a fluid flows or can flow, and to a device for heating a fluid, preferably air, including at least one such heating element.

Providing is a heating arrangement for bonding a protective shell to a wind turbine blade, including a heating blanket with a first portion and a second portion of a heatable structure, wherein the first portion and the second portion adjoin at a fold of the heating blanket, wherein the fold is curved equally or substantially equally to a curvature of an edge of the wind turbine blade or of a segment of an edge of the wind turbine blade, wherein the heating blanket is mountable to a surface of the wind turbine blade in such manner that the fold abuts the edge or the segment of the edge and that the first portion and the second portion each abuts the surface of the wind turbine blade.

A ceramic heating resistor to be arranged in a tubular element of an electrical heating element for heating a fluid, preferably air, wherein the heating resistor can be produced by sintering a green body comprising at least one ceramic raw material. The heating resistor includes an electrically insulating component and an electrically conducting component, and the electrically insulating component forms a matrix in which the electrically conducting component is accommodated. An electrical heating element for heating a fluid, preferably air, comprising including at least one tubular element, through which a fluid flows or can flow, and to a device for heating a fluid, preferably air, including at least one such heating element.

A methodology and product or system configurations are provided which allow food to be directly irradiated for cooking applications which involve the impingement of direct radiant energy on food or comestible items. Cooking vessels or cook-packs are used that are optically transmissive in visible or infrared narrow wavelength bands emitted in suitable narrowband cooking or heating systems.

A trench heater includes a case, a connecting unit, and a sub-assembly unit. The sub-assembly unit includes a baffle, a first junction panel, a second junction panel, and an electrical heating unit. The electrical heating unit includes a heating unit that comprises a heating element, a body, and a granular heat transfer medium. Multiple trench heaters may be connected end to end to create longer lengths via a modular platform.

A solid state heater and methods of manufacturing the heater is disclosed. The heater comprises a unitary component that includes portions that are graphite and other portions that are silicon carbide. Current is conducted through the graphite portion of the unitary structure between two or more terminals. The silicon carbide does not conduct electricity, but is effective at conducting the heat throughout the unitary component. In certain embodiments, chemical vapor conversion (CVC) is used to create the solid state heater. If desired, a coating may be applied to the unitary component to protect it from a harsh environment.

A refrigerated merchandiser includes a case defining a product display area. A frame is connected to the case. The frame has a frame member with an exterior surface facing an ambient environment. A coating is on the exterior surface of the frame member. The coating includes conductive particles.