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In this step we will calculate the diviersified flow and the diversity factor.
The diversity 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 flow is the sum of all individual tap design hot water flows.
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Some diversity standards are only dependent on the tapping flows, like :
Based on the Cibse CP1 2015 DIN 1988-300
Based on the CIBSE CP1 2020 / Danish Code of Practice DS 439
2a) diversity standard calculation for “flow based” diversity standards
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Diversity flow : calculated by the formula, e.g. Based on DIN 1988-300
Diversity factor : diversity flow / theoretical total domestic hot water flow
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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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Some flow based diversity standards have no standard flows defined for individual tapping points. I n that case, this option is not supported. Example : Based on the CIBSE CP1 2020 / Danish Code of Practice DS 439 |
2b) static calculation for “number of dwelling” based diversity standards
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Diversity flow : as entered by the user
Diversity factor : …