Two new ’stands’ have been added to the old stadium, and all four stands will consists of studio, one, two and three bedroom apartments within four 7-storey glass-fronted blocks.
A micro DH network system has been established at the same time as the flats are being build. The substations for it were all prefabricated by Danfoss in Denmark, but were then modified to fit to the English system on site.
The substations are supplied with an in-built energy meter that monitors the consumption of heat and water, providing accurate data for billing and faultfinding. The heat company staff can call the meters through an integral radio link, which enables remote data collection via a hand-held blue tooth receiver, so they don’t need ever to enter the apartment to read it.
Another reason why this substation is more energy efficient than a traditional boiler, which would be the alternative, is that it is without a hot water cylinder. Here you only have hot water on demand and don’t store any water.
Moreover the primary flow of water from the plant is around 70 C, but in the summertime the return temperature from the flat goes down to 25 C. This a big advantage, since it makes it possible to connect solar panels to the system, which can then bring the temperature up again to around 55 C. The panels are placed on the rooftop of one of the stands. All this makes the energy bill for the customer relatively low compared to those, who have a traditional hot water cylinder.
Facts on installed Danfoss substations:
Pressure Level: PN10
Differential pressure: 0.7bar
Design temperatures for heating: 70/26C-35/25C
Design temperatures for DHW: 70/28C-60/10C
4 sizes of substations:
• Akva Lux VX (5 kW heating and 42 kW DHW)
• Akva Lux VX (5 kW heating and 53 kW DHW)
• Akva Lux VX (5 kW heating and 60 kW DHW)
• Termix VVX Compact 20 (15 kW heating and 100 kW DHW)