Summary report tab

Contains controls used to view a summary report of the ASHRAE RTS calculation results.

Tip: You can open the Results Viewer utility to step through the calculations for displayed results by selecting the result value and clicking for more information (as prompted).

Setting	Description
Design basis	Used to display key design parameters considered for the ASHRAE RTS calculation. Selecting Design basis in the selector panel (left) updates the reports display panel (right), scrolling to the Design basis display. Location — Displays the project location set for the project in the Properties dialog box’s Properties For: Site panel. Design Day — Displays the day on which the greatest loads are experienced. The design day is used to compute sun positions and solar gains and to calculate the hourly outside dry and wet bulb temperatures using the weather database information for the specified location. External shading is/is not considered — Indicates external shading is or is not considered. The use of external shading for gains calculations is set in the Default Manager dialog box’s Simulation run-time control panel. If you opt to include external shading, the calculation will check if each window is shaded by external obstructions at each hour of the day. Shaded windows will receive diffuse solar radiation only. Fins are/are not considered — Indicates fins are or are not considered. The use of external shading for gains calculations is set in the Default Manager dialog box’s Simulation run-time control panel. Outside drybulb temperature — Displays the maximum outside drybulb temperature experienced on the design day. This value comes from the weather profile being used for the project. Rooms included — Displays the number of rooms included in the calculation.
Summary results	Summary results give a single line summary for each room showing the peak temperature and time of peak for the room. The data is arranged in the following table: Room ref. — Displays the name of each project room. No. off — Displays a room multiplier value. A room multiplier is used in computing project totals. This enables you to set up typical rooms of which there may be say twenty of one room type, eight of another, etc. Make sure that rooms you treat in this way are identical, including orientation. Rooms can be placed in particular zones and floors so that zone and floor sub-totals can be selected and computed if required. Peak room loads — Several columns display the total loads at the peak hour of the design day. Each column displays one of the component loads that, when added together, make up the total load. They are: Envelope – Heat flow through each exposed wall is computed from the wall area, U value, cooling and load temperature differences. The temperature difference value is automatically included in the calculation, and a correction is made for wall color, inside temperature and average outside temperature. The wall color correction is carried out using the wall absorption coefficient to solar radiation. Glazing – For each window, the maximum solar gain on the sunlit portion is determined, and the actual sunlit and shaded areas of glass are computed from the window dimensions and the side and top projection distances. Cooling load factors for each hour of the day are applied, depending on whether interior shading is specified or not. The shading coefficient is incorporated for all window types. For the glass in the shade, the wall cooling load factor for north facing, shaded walls is used. The thermal weight used is that specified for the room. Orientations are rationalized from angles to the nearest ASHRAE orientation (N, NNE, NE, etc). Rooflights are treated in exactly the same way as windows, except that they are assumed to be unshaded and subjected to radiation for a horizontal surface. Infiltration – The infiltration heat gain is found from the room volume, the infiltration air change rate, and the inside and outside temperatures. Infiltration gains are separated into their sensible and latent components. Internal – Gains from internal sources are determined. Internal gains are separated into their sensible and latent components. Outside Air – Outside air may be introduced locally to rooms, in which case it will affect the room load. Outside air from the central plant will form part of the supply air and will be a load on the central plant as well. Conditioned primary air will be supplied at the defined supply temperature, with optional supply humidity control. Conditioned primary air will affect both room loads and central plant loads. If conditioned primary fresh air is specified and this fresh air requires heating at the central plant, when the building requires cooling (or vice versa), then the fresh air heat load will be excluded from the central plant loads. Total — Displays the sum of all the peak room loads (on the design day) for each room. Time of Peak — Displays the hour in which the greatest loads are experienced for each room.

Setting

Description

Design basis

Used to display key design parameters considered for the ASHRAE RTS calculation. Selecting Design basis in the selector panel (left) updates the reports display panel (right), scrolling to the Design basis display.

Location — Displays the project location set for the project in the Properties dialog box’s Properties For: Site panel.
Design Day — Displays the day on which the greatest loads are experienced. The design day is used to compute sun positions and solar gains and to calculate the hourly outside dry and wet bulb temperatures using the weather database information for the specified location.
External shading is/is not considered — Indicates external shading is or is not considered. The use of external shading for gains calculations is set in the Default Manager dialog box’s Simulation run-time control panel. If you opt to include external shading, the calculation will check if each window is shaded by external obstructions at each hour of the day. Shaded windows will receive diffuse solar radiation only.
Fins are/are not considered — Indicates fins are or are not considered. The use of external shading for gains calculations is set in the Default Manager dialog box’s Simulation run-time control panel.
Outside drybulb temperature — Displays the maximum outside drybulb temperature experienced on the design day. This value comes from the weather profile being used for the project.
Rooms included — Displays the number of rooms included in the calculation.

Summary results

Summary results give a single line summary for each room showing the peak temperature and time of peak for the room. The data is arranged in the following table:

Room ref. — Displays the name of each project room.
No. off — Displays a room multiplier value. A room multiplier is used in computing project totals. This enables you to set up typical rooms of which there may be say twenty of one room type, eight of another, etc. Make sure that rooms you treat in this way are identical, including orientation. Rooms can be placed in particular zones and floors so that zone and floor sub-totals can be selected and computed if required.
Peak room loads — Several columns display the total loads at the peak hour of the design day. Each column displays one of the component loads that, when added together, make up the total load. They are:
- Envelope – Heat flow through each exposed wall is computed from the wall area, U value, cooling and load temperature differences. The temperature difference value is automatically included in the calculation, and a correction is made for wall color, inside temperature and average outside temperature. The wall color correction is carried out using the wall absorption coefficient to solar radiation.
- Glazing – For each window, the maximum solar gain on the sunlit portion is determined, and the actual sunlit and shaded areas of glass are computed from the window dimensions and the side and top projection distances. Cooling load factors for each hour of the day are applied, depending on whether interior shading is specified or not. The shading coefficient is incorporated for all window types. For the glass in the shade, the wall cooling load factor for north facing, shaded walls is used. The thermal weight used is that specified for the room. Orientations are rationalized from angles to the nearest ASHRAE orientation (N, NNE, NE, etc). Rooflights are treated in exactly the same way as windows, except that they are assumed to be unshaded and subjected to radiation for a horizontal surface.
- Infiltration – The infiltration heat gain is found from the room volume, the infiltration air change rate, and the inside and outside temperatures. Infiltration gains are separated into their sensible and latent components.
- Internal – Gains from internal sources are determined. Internal gains are separated into their sensible and latent components.
- Outside Air – Outside air may be introduced locally to rooms, in which case it will affect the room load. Outside air from the central plant will form part of the supply air and will be a load on the central plant as well. Conditioned primary air will be supplied at the defined supply temperature, with optional supply humidity control. Conditioned primary air will affect both room loads and central plant loads. If conditioned primary fresh air is specified and this fresh air requires heating at the central plant, when the building requires cooling (or vice versa), then the fresh air heat load will be excluded from the central plant loads.
Total — Displays the sum of all the peak room loads (on the design day) for each room.
Time of Peak — Displays the hour in which the greatest loads are experienced for each room.