Introduction
Some diversity standards like DIN 1988-300 define a diversity factor at DHW side, based on the number & type of tapping points, and the total DHW flow. An example is the Based on DIN 1988-300 In this step we will calculate the diviersified flow and the diversity factor.
The diversified flow is the maximum sum of all domestic hot water flows within the building, taking into account that not all tapping points are used at the same time.
The diversity factor is defined by the division of the diviersified flow through the theoretical total domestic hot water flow, and results in a number between 0% and 100%, indicating the maximum “probability“ or “statistic chance“ of having parallel tappings.
The theoretical total domestic hot water flowis sum of all individual tap design hot water flows.
“Number of dwelling” based diversity standards
Some diversity standards are only dependent on the number of dwellings, like :
In this step we calculate for one single dwelling, so the diversity factor can be defined by the formula with the number of dwellings (N) equal to one.
diversity factor
For most standards based on number of dwellings, the diversity factor within one dwelling is 100%.
diversified flow
“Flow based“ based diversity standards
Option 1 : the user defines the tapping points
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diversified flow
If the tapping points are defined, we can calculte the theoretical total DHW flow as a sum of all individual tapping points. We then use the diversity formula to calculate the diversified flow. An example can be found at e Based on DIN 1988-300The diversified flow is the max sum of flows, taking into account that not all tapping points are used at the same time.
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When calculating the diversity flow, we sum up the individual flows without recalculating them (as explained in Step 1 : recalculation of the tapflows). In other words : we calculate the diversity factor for a “standardised“ situation.
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The diversity factor is defined by the division of the diviersified flow through the theorewtical total flow, and results in a number between 0% and 100%, indicating the maximum “probability“ or “statistic chance“ of having parallel tappings.
Option 2 : the user enters the diversified flow
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directly
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