Diversity

Danish

https://docs.google.com/spreadsheets/d/1TtprDWpiO6NmWu6S8g5v00gYaIJC5v9B30qqNb8nUSw/edit?usp=sharing

UK

Below are three screen shots from two days in a row (days 8 & 9) of the total DHW loads from the 2 bed system been used to examine diversity for a retired couple.

The reason for posting it is, it demonstrates the theory nicely. You can spot the additional load from yesterday, with a new peak just after the highest peak. The peaks last approx 4 seconds each and are 10 minutes apart.

9 days of data - or 9 HIUs - gives a peak of 52kW against a potential peak of 342kW if all HIUs drew 38kW at the same time. Danish diversity gives 85kW. But this is too few HIUs to define a standard from.

If we want diversity up to say 1000 properties, then the proposition is:

Monitor 10 HIUs for 100 days gives you 1000 days of data from which you can create a standard for UK diversity, that is more relevant than the Danish standard referred to in guidance (but not yet translated into English).

Live system on http://heatweb.ddns.net:1881/diversity