Newly built 70 meters low energy high apartment building equipped with individual domestic hot water systems with
the MultiBoiler heat pump concept for space heating and hot water.
The 70-meter high “State” residential tower is based on the architecture of the New York “Flatiron Building”. The tower, which will be completed March 2020, is located in Amsterdam, has a floor area of 32,500 square meters on 23 floors. The building will include 102 social rental apartments and 150 free rental apartments, 43 owner-occupied apartments, ranging from 50 to 400 m2. It also has a penthouse of 400 m2 and a swimming pool. The project is part of the development “Amstelkwartier” Bouwinvest is the owner of the building, the construction of
which is estimated at 25.5 million euros.
The shape of the building was a challenge. Normally there is a square or rectangular tower with an equal number of houses per floor. In the State-Building there is a different number of apartments per floor and it was a challenge to make the shafts in the right way, while maintaining a good layout. The great variety in apartments has been one of the biggest challenges in the technical installations of the State tower. Some apartments have their own heat pump and others share one heat pump with four or five apartments for heating, cooling and hot water. Each
apartment has its own storage tank for hot water of at least 150 liters. A number of very luxurious expensive apartments have two 200-liter storage vessels for hot water. It is clear that the choice for individual heat pumps reduces the transport losses significantly.
Lessons learned
- The ‘multi-boiler’ concept has been developed upon experience in earlier projects, see Example projects at Annex 46 website.
Key Facts
| Building | Heat Pump and Source | ||
| Location | Amsterdam, Netherlands | Number of heat pumps | 100 |
| Construction | March 2020 | Installed capacity | 4.5 kW |
| Heat distribution | in building | Operation mode | monoenergetic |
| Heated area | 32,500 m² living | Heat source | ground |
| Level of insulation | high | Brand and type | ITHO-Daalderop WPU5G |
| Refrigerant | R134a | ||
| Sound level | 35dB | ||
| Heating System | Domestic Hot Water | ||
| Heat demand | – | Type of system | see overview |
| Heating temperature | 35°C | Max. Temperature | 60°C |
| Circulation system | individual | ||
| Legionella measures | thermal | ||
| Storage size | 150-200 litres | ||
| Number of storage tanks | 320 | ||
| Storage losses | 40Wh | ||
| Temperature control | Comfort/ECO | ||
| Other information | |||
| Electric energy | |||
| Consumption year | kWh | ||
| Investments costs | unkown | ||
| PV installation | 1,045 panels | ||
| Solar thermal | none |
VORM has made 305 apartments in a seventy-meter high residential tower of 23 floors. A striking detail is that 102 of the
apartments are intended for the social rental sector, which was a requirement from the municipality of Amsterdam, and 160
apartments in the free housing sector. In addition, a further 43 owner-occupied apartments have been realized.
Due to the large number of apartments, one option in the area of heat supply was already ruled out in advance, Air source heat
pumps were not possible, due to the large number of outdoor units that should have been installed. Another option was to
connecting to the Nuon district heating network, but was too expensive. Together with Klimaatgarant the obvious choice was to
develop a collective ground source field with 104 closed ground loops under the building. This has the advantage over glycolbased systems that there is no environmental risk and that the heat pump has a higher efficiency and a longer service life.
The installations used in State require care throughout the entire construction chain. The system only works if there is good
cooperation throughout the entire chain. The insulation of the entire building must be good and airtight. This also means that
air vents above the windows are not possible, because they can cause cold falls. Thus balanced ventilation is installed. If these
measures have been taken in the right way, it is possible to work with a low temperature heater with a very low temperature of
27 to 31 degrees.
Domestic Hot Water
The apartments are equipped with individual storage vessels for domestic hot water. The capacity of storage vessels is limited,
but the buffering of energy matches the characteristics of the sustainable system. The residents have to be instructed how to
use the system as the heat pump is not a continuous flow that most residents are used to with the gas boiler. During residents’
evenings this is explained and the majority understand and accept that unlimited hot water is no longer available. If the water
really runs out, residents can heat the storage tank again, but that will take a while. So people have to learn to deal with it.
Solar Panels
State was designed to have an Energy Performance Coefficient of 0.15. Thus a large part of the in-building energy used is
generated with solar panels. There are 1,045 solar panels on the lower part of the tower, which amounts to approximately five
solar panels on average per apartment in the lower part. There are no solar panels on the high tower, among other things
because the penthouse has a roof terrace and swimming pool. But with these types of high-rise buildings, installing solar panels
is a challenge anyway because of the limited roof space for all apartments.
Finding a place for the heat pump and boiler is not always easy in this type of projects. The available space in the apartment is
often a challenge. The technical heat pump installations by ITHO Daalderop are becoming smaller and smaller, but take up
because of the storage tank more space than a gas boiler and a mechanical ventilation unit. In the State building the heat pumps
are placed in the corridor zone outside of the apartment. That is also nice for maintenance as the residents don’t have to stay
home and the technician can always get to the installation.
Facts
- Client: VORM Development, Papendrecht
- Design: ZZDP Architecten, Amsterdam
- Execution: VORM Bouw, Papendrecht
- Investor rental properties: Bouwinvest, Amsterdam
- Constructor: Van Rossum Consulting Engineers, Amsterdam
- Ground sources: Klimaatgarant, Schiedam
- Installation of heat pumps + storage: Giesbers InstallatieGroep, Rotterdam
- Building-related installations: HEk Installatiemaatschappij, Den Bosch
- Solar panels: Klimaatgarant, Schiedam
Technical Details
