Indirect Fired Heater Design

Heater construction on a platform in the gulf mexico.

Indirect fired heater design. Due to it s design direct fired heaters are easy to transport and easy to maintain. These water heating systems work with forced air systems and hydronic or radiant floor heating. Guidelines for vertical cylindrical fired heater design. Heat is transferred from the convection section to the stack by breeching.

Where an indirect fired water heater is installed the coil is inserted not in the heating boiler but rather in the bottom of a hot water tank. These burners feature an industry proven eclipse burner. With propane or natural gas heating units the flame is contained in a burn chamber which heats a heat exchanger. Indirect fired heaters also have lower turndown ratios than direct fired heaters resulting in less ability to vary the heat output unless additional heat exchangers are added to improve turndown.

The cooler air passes over and around the heat exchanger thus heating the air. Visit tankless coil and indirect water heater basics for more on how they work. Indirect fired combustion equipment is that in which the flame and products of combustion are separated from any contact with the principal material in the process by metallic or refractory walls. They are also excellent for use in industrial space heating systems.

Exotherm corporation is a leader in the design and manufacturing of custom engineered process heaters for direct and indirect heating applications. Temperature control of an indirect fired heater is not as precise as a direct fired heater as it often under or overshoots the desired. Tankless systems are typically electric oil or gas fired. Indirect fired water heaters are a modern system and are in current sales and use.

Direct fired heaters are efficient has a lower fuel consumption rate and lower operating costs as compared to indirect fired heaters. The guidelines and procedures included herein are appropriate for a typical direct fired heater of the types found in refineries and gas plants and is not expected to include specialty heaters or furnaces that include reaction in the tubes due to heat or catalysts. You can see this design in our photo the blue tank is the indirect fired water heater and also in our sketch at page. Examples are steam boilers vaporizers heat exchangers and melting pots.

Fired heater design manufacturing. 5 mm btu hr heat recovery from gas turbine exhaust. Eclipse recirculating high temperature rht indirect air heating burners are designed to heat recirculating ovens and dryers where the products of combustion must be isolated from the process air stream. Indirect fired heaters glycol and glycol v ater baths salt bath thermal fluids single and multiple furnaces standard u tube or multi return sizes from 250 000 to 20 mm btu hr natural gas indirect glycol water bath heater.