Engineering calculator · electric heating technology
Calculate instead treasure.
Four precise calculators for the design of electrical heating systems: heating power, surface load, resistance and current as well as power loss on the tank.
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Heating output
Electrical power required to heat a medium from temperature T₁ to T₂ - taking into account mass, specific heat capacity and heating time.
kg
kJ/kg K
°C
°C
min
%
%
Required heating output (including surcharge)
—
kW
Theoretical (net)
—
kW
Total energy
—
kWh
P = (m × cp × ΔT) / (t × η) × (1 + surcharge/100)
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Surface loading
Calculation of the specific surface load of a heating element in W/cm² - critical parameter for service life and process reliability.
W
mm
mm
pcs
mm
mm
cm²
Specific surface load
—
W/cm²
heating surface
—
cm²
Evaluation
—
q = P / A | A(pipe) = π × d × L × n / 100
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Resistance & Current
Electrical design of heating elements: resistance, current, fuse - for 1-phase and 3-phase connections (star / delta).
W
v
pcs
Electrical design
Resistance R (per element)
—
Ω
Current I (total)
—
A
Recommended insurance
—
A
circuit
—
P = Power per element | R = U² / P | Iin total = (P × n) / U or (P × n) / (√3 × U)
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Power loss tank
Estimation of the heat losses of an insulated or uninsulated container - basis for the design of holding heaters and heat tracing.
mm
mm
mm
°C
°C
Heat loss (holding power)
—
W
surface
—
m²
U-value effective
—
W/m²K
Per day
—
kWh/d
Recommended heating output
—
W
Q = U × A × ΔT | Recommendation = Q × 1.3 (start-up surcharge)
Design too complex for a computer?
For demanding applications — multi-zone heating, special materials, explosion protection, tight tolerances — speak to our application engineers.
Please specify application, temperature requirement, medium, performance and installation situation.