The Best DH System we can think of
So, given we have the most enormous range of kit, and there are so many options when it comes to district heating design, it's about time we sat down and picked what we feel to be the best overall solution.
Aims
- The lowest possible return temperatures.
- The ability to turn off the heat network for considerable periods without affecting performance.
- Pipework as small as possible.
- No Legionella risk.
- High levels of DHW performance.
- Simple to install
- The minimum space within properties
- Offer as small a range of options as possible keeping kit standardised.
Storage
Stored DHW in properties may offer the best solution, but does introduce Legionella implications, as well as potential for extra heat loss and wasted stored heat.
Storage however is pretty crucial if we wand to let networks relax. The best method we have yet seen is to place storage in a communal place central to between 3 and 10 properties. This battery of heat will allow us to satisfy the majority of low level DHW demand rapidly, without placing a demand on the network at large. The use of a single store reduces the space requirements, reduces heat loss, and reduces CAPEX.
The store is also of a primary nature - a thermal store rather than a DHW store.
