Electric Radiant/Convective
The electric radiant/convective heater, radiates heat to people and surfaces and also uses convection for the surrounding air. The electric baseboard model includes the impact of the radiant heat addition to people and surfaces so that the thermal comfort and surface heat balances are impacted. The component is controlled to meet any remaining zone load not met by other equipment in the zone that have higher heating priority.
Nominal Heating Capacity
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Default: Auto Size
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Typical Range: Auto Size
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Min Max: 0 < X
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Units: W, W/ft2, W/m2, Btuh, Mbh, tons, Btuh/ft2, kW, % of Htg capacity
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This field specifies the convective electric baseboard nominal heating capacity.
Full Load Efficiency
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Default: 90%
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Typical Range: N/A
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Min Max: 0 to 100%
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Units: %
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This is the overall electrical efficiency of the electric baseboard. The zone load met by this unit is divided by the electrical efficiency to obtain the total electric energy used.
Radiant
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Default: 50%
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Typical Range: 20 to 80%
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Min Max: 0 to 100%
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Units: %
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This field specifies what fraction of the power input to the baseboard heater is actually transferred to the space as radiant heat. The fraction should be between 0% and 100%. This is the portion of the total power that is modeled as radiation. The radiant heat transfer from the baseboard heater to people should not be included in this field.
Radiant Incident on people
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Default: 50%
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Typical Range: N/A
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Min Max: 0 to 100%
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Units: %
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This field specifies the fraction of the radiant portion of heat transfer to the zone from the baseboard heater that is incident directly on people within the space. This has an impact on the predicted thermal comfort of the zone occupants. Note that although this energy is “radiant” it is actually modeled in the zone heat balance as a convective energy (like an internal gain). The basic assumption here is that radiant energy falling on people will most likely be released again to the zone air by convection. This is a simplification of reality, but it maintains the overall energy balance.
*Note that the sum of both fields the Radiant and the Radiant Incident on People should equal 100% so that all the radiant power is distributed properly.