Heat Exchanger Finned Tubular Space Heater Air Conditioner Heater Heating Elements

Heat Exchanger Finned Tubular Space Heater Air Conditioner Heater Heating Elements

heat exchanger finned tubular space heater air conditioner heater heating elements Description Incoloy 840/Stainless steel air electric fin tube heater heating element In applications where tubular heaters are exposed to forced convection, placing fins around tubular heaters increases their...
Product description

heat exchanger finned tubular space heater air conditioner heater heating elements

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Description

Incoloy 840/Stainless steel air electric fin tube heater heating element

In applications where tubular heaters are exposed to forced convection, placing fins around tubular heaters increases their surface area and thus improves their heat transferring capacity. Finned tubular heaters, compared to regular tubular heaters, run at lower surface temperatures for the same watt densities when placed in identical air streams.

Immersion Heater Applications:

Duct Heater 

Load Bank 

Air Conditioning Systems

Oven

Burn Oven

Forced air duct heating

 

Specifications


PERFORMANCE CAPABILITIES

Sheath material

SUS304.321.316,Incoloy800.840

Resistance wire

NiCr2080

Maximum temperature

1400 F ( 760C ) on alloy 800 sheath

Maximum Watt density

1-1.5KW/M ( Depending on whether there is a wind circulation )

Maximum voltage

600VAC

Wattage tolerances

+5 percent, -10 percent

Resistance tolerance

-10 percent, +5 percent

Minimum diameter

6mm

 

NOTICE

The two most critical factors that affect the durability of a tubular heater are:


1.The sheath material of the tubular elements.

 

2. Watt density, flow velocity, outlet temperature.

 

The sheath material type of a tubular heater depends on the operating temperature and the corrosivity of the medium within which the heater will operate. The watt density distribution on the surface of a tubular heater is critical for two reasons. First it determines the temperature that a heating element sheath will attain within the conditions that the heater is subjected to. The second reason is that every material has a specific maximum watt density that it can tolerate during its heating cycle.

 

Tab1 : list various sheath materials, maximum allowable temperatures and mediums within which they are recommended to operate.

 

Tab2 : list recommended maximum watt densities and medium for different materials.


Tab1


     Sheath Material

Maximum Sheath Temperature

Applications

Copper

350 F (170 C)

Immersion into water ,non corrosive low viscosity liquids

Steel

750F (400 C)

Oil, wax, asphalt, cast in aluminum or iron

Stainless Steel 304-316

1200 F (600 C)

Corrosive liquids, food industry, sterilizers

Incoloy

1500 F (815 C)

Air, corrosive liquids, clamped to surfaces

Tab2


     Sheath Material

Maximum Watts/cm2

Medium

Copper

7 W/cm2

Water, weak acid liquid

Copper

2.5 W/cm2

Food oil, lubricating oil, hydraulic oil

Stainless Steel 304-316

11 W/cm2

Water, weak acid liquid

Stainless Steel 304-316

2.5 W/cm2

Food oil, lubricating oil, hydraulic oil

Stainless Steel 304-316

5 W/cm2

Still air

Stainless Steel 304-316

5.5 W/cm2

Flow rate is not low 6m/s air

Stainless Steel 304-316

13 W/cm2

cast in aluminum or iron

Incoloy

10 W/cm2

Still air

Incoloy

11 W/cm2

Flow rate is not low 6m/s air

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