Room design conditions Outside air conditions Outside air percentage Percentage of internal and wall loads to return air System type System fan static pressure Fan motor efficiency Infiltration Reheat minimum airflow The entries required for these calculations are as follows: This gives you the ability to simulate existing buildings with installed equipment that may not be sized according to the loads calculated in the Load phase. For applications where the building design parameters are known, you can override the calculation of these values using optional entries to the System phase.

Radiation, ground diffuse radiation, total solar radiation Roof load Floor load Partition load Internal loads, people, lights, miscellaneousĭesign Phase The Design phase of the TRACE program calculates the design supply air temperatures, heating and cooling capacities, and supply air quantities given the peak load files generated by the Load phase. Wall load Transmission and absorption factors of glass Glass film coefficient Solar heat gain through glass Glass load Ground brightness, angle of incidence, direct solar radiation, sky diffuse Ground brightness, angle of incidence, direct solar radiation, sky diffuse radiation, ground diffuse radiation, total solar radiation Weather data for one day Sunrise and sunset time, solar declination angle, degrees equation of time,ĭirection cosines of sun, direct normal solar intensity, sky brightness Room Design Temperature (set point) Summer, Winter Design Values Lighting People Sensible and Latent Heat People Density Miscellaneous Sensible and Latent Heat Utilization Schedules Lighting People Miscellaneous

The specific entries required to facilitate these calculations are:Įxternal Loads Weather Weather Library (geographic location) Outdoor Design (winter, summer) Solar Latitude and Longitude Time ZoneĬlearness Number Design Month Building Orientation Construction Roof Heat Transfer Properties Roof Area Wall Heat Transfer Properties Glass U-Value Percent Glass Glass Shading Coefficient In addition, the hourly sensible and latent loads, including weather-dependent loads, are calculated for each zone, based on the weather library.Įxternal Loads Wall Load Glass Load Roof Load Floor Load Internal Lighting People Miscellaneous Load Phase The Load phase of the program computes the peak sensible and latent zone loads, as well as the block sensible and latent loads for the building. TRACE 700 Load Design comprises the first two components of the TRACE (Trane Air Conditioning Economics) program.

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