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Simple room wizard

The Simple room wizard presents a minimum of inputs for making a single-day cooling, overheating or heating load study for a rectangular room with a single window. You can also easily compute the standardized performance (according to the standards EN ISO 52022-3, EN 410 and ISO 15099) of the window and shading assembly with a single click.

After inputting the requested data, you can either simulate directly, or go on to describe more in the full user interface (of ESBO Light or full ESBO, depending on what you are using.)

Figure 1.

Location Location of the building. The geographical location can be selected from the database or downloaded. The object contains the coordinates of the location, as well as references to design day and hourly climate data. Click hyperlink to see details.

Max. temp. Information (not an input) about the maximum temperature of the (summer or winter) design day climate data. For summer conditions, the hottest day of the year is shown.

Min. temp. Information (not an input) about the minimum temperature of the (summer or winter) design day climate data. For summer conditions, the hottest day of the year is shown.

Sizing case, Summer Select to compute cooling load or overheating.

Cooling power Select to compute how much cooling power that is required in the room to maintain room air temperature below the Cooling setpoint temperature.

Overheating Select to compute how hot the room gets without any mechanical cooling.

Sizing case, Winter Select to compute how much heating power that is required in the room to maintain room air temperature above the Heating setpoint temperature.

Envelope Select the wall and floor constructions of the room. Click on link to see each element and then double click on element to edit details.

Window area incl. frame The window’s total area (frame outside measurement.) 10 % is assumed to be taken up by the frame.

Shading type Select the type of solar protection to be used.

Shading Select the specific shading product. Click on link to change a specific aspect of the product, such as the fabric used.

Glazing Select the glazing system to be used. Click on link to edit the specific pane and gap combination.

Button: g for system Press this to compute the properties for the combination of shading and glazing at reference conditions according to the standards EN ISO 52022-3, EN 410 and ISO 15099. Only shading and glazing data is used for this calculation. For a further description of the computation, see Window.

Room height Distance between the flooring and the ceiling.

Width Distance between the side walls, inside measurement.

Length Distance from the window wall to the opposite wall, inside measurement.

Orientation Selection of the compass point that the window faces.

Number of occupants Number of persons that load the room (dry and wet)

Light Rated input power when lights are on

Other loads Dry convective heating power from appliances in the room

Operation time Hours per day that each load is active. Load is assumed to be centered around 13:00

Supply air flow Total supply air flow= exhaust air flow (when fans are running)

Unit for air flows Select your preferred unit for air flows. The unit you select here will also apply in the general part of the program.

Fan operation time Hours per day for mechanical ventilation, centered around 13:00

Supply air temperature Temperature of in-blown air. For Overheating runs, no mechanical cooling is applied in the air handling unit and the temperature setpoint is therefore disabled.

Cooling setpoint Set value for the room thermostat for cooling

Heating setpoint Set value for the room thermostat for heating

The room has one external wall but is assumed to be otherwise surrounded by rooms with the same temperature conditions. The room is assumed to have a fully balanced mechanical supply and exhaust air system.

For cooling design and overheating studies, a statisticallyDesign day weather data is according to ASHRAE Fundamentals 2021 (or 2013), by default the 2% monthly cumulative frequency level for cooling design (can be set from 0.4 to 10%) and the 99.6% level for heating.mouseover selected clear and hot day is simulated over and over until the building has completely adapted, corresponding to a very longMaximized to 14 days in ESBO. This is sufficient for most buildings to adapt.mouseover spell of identical hot days. The process is repeated for each month of the yearProcess is terminated in fall/spring if heat load is decreasing from month to month.mouseover. Results from the month where the maximum cooling (or overheating) in the zone occurs are presented. Note that the required cooling in the air handling unit is not included in the presented cooling power.

A trick to limit the simulation to only a single month is to open the Location object, press User-defined design days, and then press OK. This will limit the available climate data (and simulation) to a single month (the hottest).

The difference between a cooling power and an overheating study is that no mechanical cooling is used for the latter and the day with the highest room temperature is presented in the report.

A heating design study is similar to cooling design, but a bit simpler. Only a single cold spell is studied, and for this coldest month, a statistically selected cold day is repeated until the building has adapted. For the winter study, internal gains are assumed to be zero, and no solar radiation is allowed to enter the building.

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