Electric Heaters Types and Terms
Electric Heater Types
- use electricity to warm air.
- are o-shaped heating devices that secure
around an element. They can clamp around the outside of a cylindrical
element and heat from the outside or clamp around the inside.
- are compact cylindrically shaped heaters which
are used primarily for immersion applications. They also have a protective
sleeve or sheath protecting the heating element from the immersion
liquid.
-
and coil heaters are formed from straight pieces of heating cable. These
heating elements are formed into coils, spiral, sinuated, star wound
or other patterns.
- contain a layer of ceramic fiber insulation
combined with a heating element. It is usually an industrial heater
and available
in cylindrical and flat configurations.
-
are used primarily to heat fluid streams in motion. Fluid runs through
the heater, which increases the stream temperature; any liquid or gas
is generally suitable for use with a circulation heater.
- are used to heat drums or their contents. Most drum
heaters can accommodate various sizes of drums and many different substances.
- can heat moving gas streams and heat air as it moves
through the heater. It is also sometimes used to intensely heat an
object at
the end of a stream of gas.
-
blow hot air down into the area needing heat and rapidly heat it to
a desired level.
- are devices that may be formed to fit a variety
of items. Flexible heaters are made from pliable materials such as
rubber
or neoprene so they can be formed to fit a variety of circumstances.
-
are made of flexible heater wire bonded to a thin aluminum substrate.
The wire can be bended into a variety of shapes and act as the transport
for the heat used.
- are used when it is necessary to immerse a heater
in the material being heated. Examples of such materials can be water
or liquid polymers.
-
use a shield to reflect radiant heat onto a surface that is heated.
Types of infrared heaters include metal-sheathed tubular heaters,
quartz tubes, quartz lamps, gas fired catalytic, flat-faced panels and
ceramic emitters. (www.infraredheaters.net)
- are the same as immersion heaters except that
they hang over the side of a tank into the heated material.
-
diffuse energy heat rays in a 160 degree arc, and deliver heat evenly.
They can maintain an almost uniform area temperature so that there is
not more than 2 degrees variation in the space; many radiant heaters
are so exact that heat can be directed to specific locations.
- are electric heaters that require minimal space.
-
convert electric energy into heat. This is an irreversible conversion
of electricity into heat; these heaters are often used for water and
other fluids.
- are used to heat air, solids or liquids generally
for custom heating purposes. These can sometimes be designed
for mobile
jobs in various fields.
Electric Heater Terms
- The
meter-kilogram-second unit of electric current that is equivalent to the
steady current produced by one volt applied across a resistance of one
ohm.
- Used
for measuring a quantity of heat. One BTU is the quantity of heat necessary
to raise the temperature of 1 pound of water 1°F.
- The metric temperature
scale in which water freezes at zero degrees and boils at 100 degrees,
designated by the symbol "C".
- An electrical device
providing a trail for electrical current to flow.
- An enclosure in which
air is moved that is primarily constructed from sheet metal.
- The heat scale
on which water freezes at 32 degrees and boils at 212 degrees, abbreviated
by the letter F.
- A device that creates
currents of air, sometimes built in electric heaters to push air out from
the unit.
- Any coiled element
that serves as the source of heat.
- The component
of the heater which is responsible for conducting the heat.
- In alternating current
(AC electricity), the number of cycles per second, denoted hz.
- Jean Peltier
in 1834, discovered that passing an electric current through the junction
of two different conductors cools or heats the junction depending on the
direction of the current. The modern Peltier modules are made out of semiconductor
material, and are used in thermoelectric devices.
- The distribution of
energy by electromagnetic waves, of a generally long wave-length.
- Any device that reacts
to a change in the environment being measured, by signaling of the change
via audible or visual means.
- A measurement of heat
equal to 100,000 btu.
- Measures the
difference in potential created at the junction of two different metal
wires, which feed from the measuring instrument. (http://www.thermocouple-assemblies.com)
- An automated device
for controlling temperature.
- A power semiconductor
device with three terminals called the gate, cathode and anode. Its state
becomes conductive (ON) or blocking (OFF) depending on the behavior of
these terminals.
- The difference of possibility
between two points in a conducting wire with a constant current of one
ampere.
- The meter-kilogram-second
unit of power equal to the power produced by a current of one ampere across
a potential difference of one volt, 1/746 horsepower.