Direct Fired Heater Efficiency

Direct fired heaters are both more efficient and less expensive than indirect fired heaters.

Direct fired heater efficiency.

If desired a quantity of returning room air can be added b to this outside air in a balanced fashion to assure a constant total airflow. Choice depends on fuel cost thermal efficiency temperature desired size of the heat load. Having a thorough understanding of all of the differences between these two heater types will ensure you choose the optimal solution for each project. Although the example illustrates the energy savings of direct gas fired vs.

Outside air enters the unit at point c and is either filtered or not. For example a steam heating coil is supplied by a boiler has a maximum efficiency of 80 percent and experiences distribution piping energy losses. Direct fired heaters can utilize radiant and or convection heat transfer sections and can be configured in many different ways depending. Direct fired gas heating is one of the simplest and most cost effective methods for heating air.

Having a thorough understanding of all of the differences between these two heater types will ensure you choose the optimal solution for each project. There is a wide variety of heating configurations. Because the temperature in both sections is very high an intermediate heat transfer fluid is typically used. Direct fired air heaters are typically less expensive and more efficient than indirect fired units as direct firing units converts nearly 100 of the combustion gases used to hot air.

Based on method outlined in api 560 annex g procedure intended for fired heaters burning liquid or gaseous fuels. Tulsa heaters midstream 3 measuringfired heaterefficiency this guide will teach you the process of measuring and calculating your heater s efficiency so you can optimize your plant and save money. Direct fired heaters are both more efficient and less expensive than indirect fired heaters. A direct fired heater is a style of heater in which a burner provides hot gasses that transfer their heat energy to a process liquid or gas flowing directly through coils installed inside the heater vessel.

However there are some cases where an indirect fired heater is the better choice. However there are some cases where an indirect fired heater is the better choice. Below is a diagram of a direct fired air heater.