Social Dwellings in Soissons
Renovation of domestic hot water production in 12 social dwellings
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In this social housing building, heating is supplied by a renovated district heating grid connected to a wood-fired heating plant. Until now, the Domestic Hot Water production was ensured by individual electrical water heaters. The replacement of these individual solutions (in 12 dwellings) by a collective heat pump induces in a 50% reduction on the electric bill due to domestic hot water production.
Some figures
- Before renovating, the primary energy consumption due to DHW production was about 75 kWhep/m².yr
- Final objective for ep consumption is 24 kWhep/m².yr.
Key facts
| Building | Heat pump and source | |||
| Location | Soissons, France | Number of HP | 1 | |
| Construction | 1975 | Installed power | 11kW | |
| Heat distribution | collective | Operation mode | DHW only |
|
| Heated area | 841 m² living | Heat source | outside air |
|
| Level of insulation | average | |||
| Heating system | Domestic hot water | |||
| Heat demand | unknown | Type of system | central | |
| Heating temperature | unknown | Max. temperature | 60 °C | |
| Hot water storage | 1500 l |
|||
| Distribution System | Thermodynamic loop heater | |||
| Other information | ||||
| Electric energy consumption 2016 | 29 kWhep / (m².yr) |
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| Investments costs | unknown | |||
| Renewables ratio | 50% | |||
Description of the technical concept
The system consists of:
- A 11 kW Atlantic® air-to-water heat pump
- 2 storage tanks with a 750 liters capacity each
- An Atlantic® thermodynamic loop heater
The system functioning is based on an accumulated mode : the storage tanks allow to store the daily DHW
needs. Then, the heat pump produces heat during the night, for 8 hours continuously.
Even if the outside air temperatures are lower during the night, this type of operation offers advantages in
terms of performances :
- After a day of draw-offs, the volume of water in the tanks is completely cold optimized COP
- An operation during night allows to benefit from lower electricity tariffs
