Example 1
If two of the parameters were combined as illustrated, a simulation will be performed for each permutation of the parameters combination and therefore the total number of simulation will be:
(5x3) + 3 + 2 = 20
Example 2 compromises four simulation parameters:
1. Combined parameters: Room Occupancy Sensible Gain and Room Fluorescent Lighting Gain
2. Independent parameter: Room Computer Gain
3. Independent parameter: Apache System Cooling SSEER
|
Parameter 01
|
|
|
Room Occupancy Sensible Gain (W/m2)
|
55
|
60
|
65
|
70
|
75
|
|
Room Fluorescent Lighting Gain (W/m2)
|
6
|
12
|
18
|
6
|
12
|
18
|
6
|
12
|
18
|
6
|
12
|
18
|
6
|
12
|
18
|
The combined Room Occupancy Sensible Gain parameter will run a total of 5 permutations between 55 W/m2 and 75 W/m2 with the other combined parameter Room Fluorescent Lighting Gain running a total of 3 permutations between 6 W/m2 and 18 W/m2.
Each combination of the two parameters accounts for a single simulation, resulting in a set of 15 simulations.
|
Parameter 02
|
|
|
Room Computer Gain (W/m2)
|
5
|
10
|
15
|
The independent parameter Room Computer Gain will run a total of 3 permutations between 5 W/m2 and 15 W/m2.
|
Parameter 03
|
|
|
Apache System Cooling SSEER
|
0.65
|
1.00
|
The independent parameter Apache System Cooling SSEER will run a total of 2 permutations between 0.65 and 1.00.
Total Number of Simulations for Study: 15 + 3 + 2 = 20
Example 2
If the following grouping is applied where the Weather parameter is the ‘parent’ parameter to the linked parameters.
The weather parameter will first run seven times as an independent parameter.
For each weather parameter, the Apache System Cooling SSEER parameter will be applied to it twice as well as the Room Cooling Set-point parameter. As a result the total number of simulations will be:
7+ (7x2) + (7x2) = 35
Example C will compromise of three parameters:
1. Combine weather parameter will run as an independent parameter.
2. Combine weather parameter will be linked to Apache System Cooling SSEER parameter.
3. Combine weather parameter will be linked to Room Cooling Set-point parameter.
|
Parameter 01
|
|
|
Weather Variable
|
Weather File 1
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Weather File 2
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Weather File 3
|
Weather File 4
|
Weather File 5
|
Weather File 6
|
Weather File 7
|
The weather parameter will run a total of 7 permutations by changing the weather file. Since only one variable was grouped as ‘Combine’, the first set of simulations will perform like an independent variable.
|
Parameter 02
|
|
|
Weather Variable
|
Weather File 1
|
Weather File 2
|
Weather File 3
|
Weather File 4
|
Weather File 5
|
Weather File 6
|
Weather File 7
|
|
Ap. Sys. Cooling SSEER
|
0.45
|
1.00
|
0.45
|
1.00
|
0.45
|
1.00
|
0.45
|
1.00
|
0.45
|
1.00
|
0.45
|
1.00
|
0.45
|
1.00
|
The ‘combine’ weather parameter will run a total of 7 permutations while the linked parameter will run a total of 2 permutations between 0.45 and 1.00.
The linked Apache System Cooling SSEER parameter will act like a combined parameter for only this simulation set.
Each combination of the two parameters accounts for a single simulation therefore resulting in a set of 14 simulations.
|
Parameter 03
|
|
|
Weather Variable
|
Weather File 1
|
Weather File 2
|
Weather File 3
|
Weather File 4
|
Weather File 5
|
Weather File 6
|
Weather File 7
|
|
Room Cooling Set-point (oC)
|
20
|
26
|
20
|
26
|
20
|
26
|
20
|
26
|
20
|
26
|
20
|
26
|
20
|
26
|
Again, the ‘combine’ weather parameter will run a total of 7 permutations while the linked parameter will run a total of 2 permutations between 20 oC and 26 oC.
Each combination of the two parameters accounts for a single simulation therefore resulting in a set of 14 simulations.
Total Number of Simulations for Study: 7 + 14 + 14 = 35
Example 3
If the following grouping is applied where two parameters are grouped as ‘Combine’ and two additional parameters grouped as ‘Link’:
A simulation is performed for each permutation of the combined parameters and then for each of the linked parameters, the Room Computer Gain parameter will be applied three times and the Apache System Cooling SSEER will applied two times. As a result, the total number of simulations will be:
(
5x2) + (5x2x2) + (5x2x2) = 50
Example 4 compromises four parameters:
- Two combined parameters: Room Occupancy Sensible Gain and Room Fluorescent Lighting Gain.
- Combined parameters will be linked to Room Computer Gain.
- Combined parameters will be linked to Apache System Cooling SSEER.
|
Parameter 01
|
|
|
Room Occupancy Sensible Gain (W/m2)
|
55
|
60
|
65
|
70
|
75
|
|
Room Fluorescent Lighting Gain (W/m2)
|
6
|
12
|
6
|
12
|
6
|
12
|
6
|
12
|
6
|
12
|
The combined Room Occupancy Sensible Gain parameter will run a total of 5 permutations between 55 W/m2 and 75 W/m2 whilst the other combined parameter Room Fluorescent Lighting Gain will run a total of 2 permutations between 6 W/m2 and 12 W/m2.
Each combination of the two parameters account for a single simulation, resulting in a set of 10 simulations. This can now be considered as the base set for the linked variables.
|
Parameter 02
|
|
|
Room Occupancy Sensible Gain (W/m2)
|
55
|
60
|
65
|
70
|
75
|
|
Room Fluorescent Lighting Gain (W/m2)
|
6
|
12
|
6
|
12
|
6
|
12
|
6
|
12
|
6
|
12
|
|
|
Room Computer Gain (W/m2)
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
5
|
15
|
|
The Room Computer parameter will run a total of 2 permutations between 5 W/m2 and 15 W/m2 .
By linking the Room Computer Gain parameter to the combined parameters or the “base set” (Room Occupancy Sensible Gain and Room Fluorescent Lighting Gain) will result in a total of 20 simulations.
|
Parameter 03
|
|
|
Room Occupancy Sensible Gain (W/m2)
|
55
|
60
|
65
|
70
|
75
|
|
Room Fluorescent Lighting Gain (W/m2)
|
6
|
12
|
6
|
12
|
6
|
12
|
6
|
12
|
6
|
12
|
|
Ap. Sys. Cooling SSEER
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
.6
|
1.0
|
The Apache System Cooling SSEER parameter will run a total of 2 permutations between 0.6 and 1.0.
As illustrated previously, by linking the Apache System Cooling SSEER parameter to the combined variables or the “base set” (Room Occupancy Sensible Gain and Room Fluorescent Lighting Gain), will result in a total of 20 simulations.
Total Number of Simulations for Study: 10 + 20 + 20 = 50
