How can you get monumental municipal homes without an extreme renovation of the gas? Technische Unie facilitated the sustainability of six homes in the village of Nagele in the Noordoostpolder.
To make six municipal monumental homes more sustainable and get rid of gas. The Hendrick de Keyser Association – owner of the houses – took up the challenge.
The project: Six monumental municipal homes have been preserved and restored.
Where: Karwijhof in Nagele
How: Every home got Triple Solar PVT panels on the roof. The panels were connected to a water / water heat pump from NIBE.
Client: Vereniging Hendrick de Keyser from Amsterdam
Contractor: Friso Bouwgroep B.V. from Leeuwarden
Installation company: Bite Installatietechniek from Hattem Delivery installations: Technische Unie
Installations: Triple Solar PVT panels & NIBE water / water heat pump Installation
advice: INNAX Building & Environment
The six municipal monumental houses are now five single-family homes (approx. 80 m2) and a double larger house. All homes are completely free of gas / off the grid / all electric.
Nagele: a little history The village of Nagele was built from 1955 as the last of ten villages in the Noordoostpolder. From an urban planning point of view, this was an experiment. The other villages were designed in the traditional style of the “Delft School”, with gabled roofs and red tiles. Nagele was designed by architects of “Nieuwe Bouwen”, including Cornelis van Eesteren, Ben Merkelbach, Gerrit Rietveld and Aldo van Eyck. These architects were faced with radical changes in planning and architecture (flat roofs and a lot of glass). The village without a village center Nagele thus became the only “rural village” in the Netherlands. By abolishing the village center and replacing it with a lawn where the churches and schools were built, the architects wanted to destroy the social hierarchy in society. A village center did not fit their vision. After all, it was based on social principles. Everyone was equal and everything and everyone was the core. Because of this unique vision, the homes in this project had to maintain the current style as much as possible while at the same time being as sustainable as possible.
“Sustainability while preserving the historical character makes high demands” Engineer Ann-Katrin Adolph of Vereniging Hendrick de Keyser was the restoration architect of this project. “Our goal was to make these monumental municipal homes as sustainable as possible while preserving their historic character. However, this placed high demands on the design and implementation. Not every solution is feasible because both the interior and the exterior must remain in their original state as much as possible or must be returned. ” Simply insulating is not enough “Our monumental buildings cannot always be made more energy efficient by simply insulating them better. That is why we also started looking for technical solutions that fit the buildings. For example, customized installation solutions have been devised that are versatile and affordable for the owners. In this way we try to make our homes as sustainable as possible (or as well) as possible. Making these monumental houses in Nagele as sustainable as possible and making them gas-free was a really special challenge for us, ”says Adolph.
Large installations, little space Michaël van der Weg of Friso Bouwgroep: “It was an exciting preliminary process, especially because it concerns small homes from the 1950s. The possibility of insulation is limited, but we still wanted to have certain energy-efficient applications in the home. “” The client already had a basic plan for the energy adjustment. We have worked this out together as a construction team (contractor, installer and client). Installer Bite Van Belzen discovered that the basic plan was not going to work completely. They then supplemented it with underfloor heating on the ground floor and on the first floor. In addition, quite a lot of space was needed for the installations. We had to look carefully where it could all be placed. It was really compromising with space. For example, the inverter of the PVT-solarpanels has been placed in a washing cabinet on the first floor and the distributors of the underfloor heating have been concealed in cupboards and basements. In addition, the heat pump has been moved from an external storage room (10 meters outside the home) to a storage room in the home. ”
Liander also came quite late with the requirement that the new cables also had to have new input bends due to the heavier electricity connection. “These infeed bends were not yet used in the 1950s and now had to be placed under the existing concrete floors. All in all, we have delivered a great project ”, says Van der Weg. About the sustainable solution The solution for this project turned out to be the Triple Solar PVT solar panels in combination with a water / water heat pump from NIBE. With this combination, no soil drilling is required and the heating of the house and the tap water are controlled by these devices.
Triple Solar PVT panels with NIBE water / water heat pump
To make the houses in Nagele completely gas-free, PVT heat pump solar panels were chosen as the source for the water / water heat pump. The advantage of this combination is that no soil drilling is involved. The energy source for the heat pump is simply located on the roof in the form of PVT heat pump solar panels. In addition, it is a “silent solution”. With a water / water heat pump, there is no outdoor unit and there are no moving parts. The combination of Triple Solar PVT solar panels with a NIBE water / water heat pump provides heating, hot tap water and electricity in the homes. How do PVT heat pump solar panels work? The front of a PVT panel consists of photovoltaic cells (PV) that convert sunlight into electricity. The back of the panel is a thermal exchanger (T). In combination with the water / water heat pump, this provides space heating and hot tap water in the home. PVT heat pump solar panels cannot be compared to solar collectors. PVT solar panels also work at night and in winter. The panels are not insulated at the back, so that as much heat as possible is extracted from the environment. This means that the panels always work. Even without sunlight. Copper pipes from the thermal exchanger are located at the rear of the panels. Glycol, a coolant, flows through this. This absorbs the ambient heat and conducts it to the water / water heat pump in the home. The heat pump in turn provides heating for the house and tap water. The electricity that the Triple Solar system generates is usually sufficient for the energy consumption of the water / water heat pump.
How does a water / water heat pump work? The energy source for the heat pump in these homes is therefore formed by the PVT heat pump solar panels from Triple Solar. The heat pump in the homes is a water / water heat pump of the NIBE brand. This water / water heat pump is usually combined with a closed source deep in the ground. The heat pump then extracts heat from the ground via this source. Since in this case the “source” is on the roof, this solution did not require soil drilling. The water / water heat pump works with a refrigerant that circulates through a compressor, condenser, expansion valve and an evaporator. This converts heat from the PVT solar panels into usable energy. This energy is then used to heat the home (in this case via the underfloor heating) and to heat tap water for the shower or kitchen.
The end result Andries van Belzen of Bite Van Belzen Installatietechniek: “The PVT heat pump solar panels now supply the water / water heat pump with electricity all year round. The remaining electricity consumption of the home therefore remains the same as in the old situation. But gas consumption is completely eliminated. This means that the houses are now completely free of natural gas and the historic character has been preserved. ” Would you like to know more about this project, or do you also want to make your home or monument more sustainable? Email to email@example.com for more information.