Zone Filter¶
The Zone filter allows you to view results that change on a zone by zone basis. As the result varies depending on the zone, each zone will report a different result.
Dry Bulb Temperature¶
The zone’s Dry Bulb air temperature.
Mean Radiant Temperature (MRT)¶
Mean Radiant Temperature (MRT) is a measure of an occupant’s perception of the radiant temperature in the zone. MRT is calculated as a weighted average of the zone’s surface temperatures, modified by the effects of radiant gains (plant, incidental gains and the diffuse component of solar gain). For more details on how it is calculated, see the Theory manual.
Resultant Temperature¶
The zone’s Resultant Temperature is the average of the zone’s Dry Bulb and Mean Radiant temperatures. This is equivalent to CIBSE definition of Operative temperature for internal air velocities less than or equal to 1 metre per second.
Sensible Load¶
The zone’s Sensible Load is just the Heating Load minus the Cooling Load. If the value is positive then the zone is being heating while if the value is negative then the zone is being cooled.
Heating Load¶
The zone’s Heating Load is the total heating load required to increase the zone’s Dry Bulb temperature so the zone reaches the temperature lower limit set in the zone’s Internal Condition.
Cooling Load¶
The zone’s Cooling Load is the Sensible Cooling Load required to decrease the zone’s Dry Bulb temperature so the zone reaches the temperature upper limit set in the zone’s Internal Condition.
Solar Gain¶
Represents the heat gained by the zone due to the solar energy absorbed by the inside surface for all surfaces facing into the zone.
Lighting Gain¶
Represents the heat gained by the zone due to the lighting in the space. The result here includes both the radiant and convective gain from the lights. As lighting is an input in the Internal Condition, the result here will match up with the lighting information entered in the zone’s Internal Condition.
Infiltration Ventilation Gain¶
Represents the heat gained (or, if negative, lost) by the zone due to the exchange of air between the zone and the external environment. This air exchange may arise from air flows specified under Infiltration or Ventilation in the Internal Conditions, from specified air movement, or from aperture flows.
Air Movement Gain¶
Represents the heat gained (or, if negative, lost) by the zone due to the exchange of air between the zone and other zones. This air exchange may arise from specified Inter-Zone Air Movements (IZAMs), or from internal aperture flows.
Building Heat Transfer¶
Represents the sum of heat gains (or, if negative, losses) by the zone from two sources:
1. Heat entering, or leaving, the zone from a link, adiabatic or internal building surface.
2. Heat which has been temporarily stored in the air when increasing the air temperature. This will be positive when the air temperature is falling, and negative when it is rising.
Note that all TSD result gains and losses sum to zero for the zone, and the building heat transfer result is often a reflection of the fact that the zone temperature is changing, rather than a ‘root cause’. If there is a large building heat transfer value, it may be worthwhile to check other results for large values to see what is driving the change in zone temperature, e.g., solar gains, fabric losses, etc.
External Conduction Opaque¶
Represents the sum of the heat gains (or, if negative, losses) for the zone due to conduction through any opaque surface on the envelope of the building (i.e. surfaces with type Exposed or Ground).
Note that although this results series is called ‘conduction’ it in fact includes heat flows of all types, including radiative transfer to the building fabric from internal condition gains and emitters.
External Conduction Glazing¶
Represents the sum of the heat gains (or, if negative, losses) for the zone due to conduction through any transparent exposed surface.
Occupant Sensible Gain¶
Represents the sensible heat gain in the zone due to the occupants in the zone. The result here includes both the radiant and convective gain from the occupants. As occupancy is an input in the Internal Condition, the result here will match up with the Sensible Occupancy Gain entered in the zone’s Internal Condition.
Equipment Sensible Gain¶
Represents the sensible heat gain in the zone due to any equipment in the zone. The result here includes both the radiant and convective gain from the equipment. As equipment gain is an input in the Internal Condition, the result here will match up with the Sensible Equipment Gain entered in the zone’s Internal Condition.
Humidity Ratio¶
The Humidity Ratio of the air within the zone.
Relative Humidity¶
The Relative humidity of the air within the zone.
Occupancy Latent Gain¶
Represents the latent heat gain in the zone due to the occupants in the zone. As occupancy is an input in the Internal Condition, the result here will match up with the Latent Occupancy Gain entered in the zone’s Internal Condition.
Equipment Latent Gain¶
Represents the latent heat gain in the zone due to any equipment in the zone. As equipment gain is an input in the Internal Condition, the result here will match up with the Latent Equipment Gain entered in the zone’s Internal Condition.
Latent Load¶
The zone’s Latent Load is just the Latent Addition Load minus the Latent Removal Load. If the value is positive then moisture is being added to the zone, while if the value is negative then moisture is being removed from the zone.
Latent Removal Load¶
The zone’s Latent Removal Load is the amount of Latent Load required to remove moisture from the air so the zone reaches the Humidity Upper Limit set in the zone’s Internal Condition.
Latent Addition Load¶
The zone’s Latent Addition Load is the amount of Latent Load required to add moisture into the air so the zone reaches the Humidity Lower Limit set in the zone’s Internal Condition.
Vapour Pressure¶
The Vapour Pressure of the air in the zone.
Aperture Flow In¶
The total amount of air flowing into the zone through the selected apertures. For this result to display correctly, you must use an output selection that contains both the zone and the aperture surfaces within the zone. If you only select the zone and not the aperture, you will not see any air flow.
Aperture Flow Out¶
The total amount of air flowing out of the zone through the selected apertures. For this result to display correctly, you must use an output selection that contains both the zone and the aperture surfaces within the zone. If you only select the zone and not the aperture, you will not see any air flow.
Infiltration¶
The fresh air infiltration (leakage) into the zone. As infiltration is an input in the Internal Condition, the result here will match up with the Infiltration Rate entered in the zone’s Internal Condition.
Ventilation¶
The fresh air that enters the zone via mechanical ventilation systems. As this is an input into the simulation, the result here will match up with the Ventilation Rate entered in the zone’s Internal Condition.
IZAM In¶
The total amount of air flowing into the zone through Inter-Zone Air Movements (IZAMs).
IZAM Out¶
The total amount of air flowing out of the zone through Inter-Zone Air Movements (IZAMs).
Relative Pressure¶
The pressure within the zone can be either positive or negative with respect to outside of the zone. A positive pressure will occur when there is more air being supplied to the zone than exhausted. A negative pressure will result when there is more air being removed from the zone than supplied.
Pollutant¶
The zone’s Pollutant Level details how polluted the zone’s air is. If no pollutant generation is modelled in the zone’s Internal Condition, then the pollutant level will equal the External Pollutant Level set in the Building Simulator file.