Breadcrumbs

Based on the Swedish regulation DHA F:101

https://www.energiforetagen.se/globalassets/energiforetagen/det-erbjuder-vi/publikationer/f101-district-heating-substations-design-and-installation.pdf

Application

Domestic Hot Water

This standard calculates the diversity based on

  • Number of tapping points

  • Type of the tapping points

  • Total DHW flow

  • Diversified DHW flow

  • Number of dwellings

Diversity formula

With this calculation method, the diversity factor decreases according to the formula (0.0417 + 0.015 * (0,0555N-0.0417) + 0,0775 * sqrt(0,0555N-0.0417)) / N*0,0555), in which N is the number of dwellings.

The diversified flow rate for one dwelling is calculated based on the default power 38 kW as mentioned in the F:101, in combination with the temperature regimes as defined by the user.

image-20220415-123304.png

Variant for high DHW usage

We also support the variant for high DHW usage. With this calculation method, the diversity factor decreases according to the formula (0.0417 + 0.015 * (0.0555N-0.0417) + 0.0775 * sqrt(0.0555N-0.0417)) / N*0.0555), in which N is the number of dwellings. The concurrent flow rate for one dwelling is calculated based on the default power 38 kW as mentioned in the F:101.

image-20220415-123523.png

Applies diversity

  • inside the dwelling

  • outside the dwelling

Requires recalculation of DHW flows?

No.