A comfortable indoor environment at low, fixed energy rates

The original main building (Cross Building) on Velperweg provides space for 12 residential floors with a total of 281 apartments, with a grandiose view of the city. Thermal storage and heat pumps guarantee a comfortable indoor climate at low energy rates. The combination with solar panels also ensures an A++ energy label.

Respecting the environment, society and clients (tenants and investors). That is what Borghese Real Estate stands for. "We develop housing, healthcare complexes, offices, hotels, retail and logistics real estate, with a clear vision of sustainability, circularity and the environment," said Project Manager Henk Zweepe. "As in our own office, where we have been located since the summer of 2018 and which has a BREEAM-NL Outstanding and WELL-Gold certification, we believe it is important that clients can work and live healthily and comfortably in a sustainable environment. This sustainability is not only in the reuse of building materials, sustainable transport and optimal use of space, but also in smart installations and techniques that minimize energy consumption. The reuse of existing real estate, as in the High Park project, fits in perfectly with this. We brought the former ING office back to its essence, with generous spaces, high ceilings and special detailing. We also demolished part of the building in a circular fashion. In doing so, we returned public space to its surroundings and created enough space for balconies, terraces and even a large landscape park. Moreover, this makes the main building stand out even more. To bring the building into the 21st century, a completely new shell was installed. The Cross building has also been taken off the gas."

Turnkey energy supply

At the basis of High Park's energy supply is a sustainable and collective energy generation system, consisting of a CHP, an extensive pipe network and 281 individual heat pumps. Owner and operator of the system is Eteck. The turnkey heat supplier completely relieved Borghese by realizing the generation system at its own risk and expense, says Team Leader Project Management Ruud Dorlandt. "We have invested here, with co-financing from Borghese, in a local and sustainable heat system. With this we will provide residents with heating, cooling and hot tap water for the next 30 years for a fixed amount per month. In addition, we are making an important contribution to sustainability in the Netherlands."

Existing WKO preserved and revitalized

Croonwolter&dros engineered and realized the energy generation system on behalf of Eteck. This made use of the existing WKO system from the 1990s, with two cold sources on the site and two hot sources further in the neighborhood. "We had several tests carried out, to determine the condition of the sources," says Technical Specialist System Design Marco Brouwer. "This showed that the wells were excellent for revitalization. In addition, all the site pipes and cabling were still intact. Only the indoor facilities in the basement had to be reconnected. A connection also had to be made with the WPU 5G heat pumps in the homes. In the preparatory phase, we had close contact with heat pump supplier Itho Daalderop to optimize the installation design and coordinate delivery times and quantities. In order to perfectly connect the heat pumps to the housing installations, regular coordination meetings were also held with Van Losser Installations."      

Demarcations

Commissioned by building contractor Klok Groep, Van Losser Installaties provided the design and realization of the mechanical and electrical installations in the Kruisgebouw. From the heating, cooling and air treatment in the apartments to the electrical and fire alarm systems. "Underfloor heating and cooling was chosen as the delivery system in the apartments, with an Itho Daalderop Spider room thermostat in combination with an Autotemp Spider system providing control for each room," said Head of Plan Development René Fokke. "In consultation with Croonwolter&dros and Itho Daalderop, we determined the demarcations for the climate systems. It was agreed that we would take care of the waterside part, including the installation of the Autotemp underfloor heating manifolds and connection to the heat pump."

Van Losser Installations had no previous experience with Itho Daalderop's Autotemp floor heating distributors, but the installation went well, according to Fokke. "Because the motors are provided as standard, for us it was just a matter of mounting distributors on the wall, connecting floor heating pipes and done. The control beams were installed by Croonwolter&dros mechanics, who also connected the motors."

Unmatched high efficiency

The choice of the WPU 5G heat pumps in High Park was a logical one, according to Dorlandt. "Partly because of the favorable price-quality ratio, the small floor area of 60×60 cm and the excellent specifications. The now fifth generation heat pump has an extremely high efficiency for heating, cooling and domestic hot water preparation." Maarten Pels, Project Advisor at Itho Daalderop: "A unique feature of the WPU 5G is that it can prepare hot water while cooling the home. This results in an unparalleled high efficiency. In addition, there is more flexibility in terms of heating and cooling than with block heating, for example. As a result, residents can enjoy a pleasant indoor climate all year round." The hot tap water is buffered in storage tanks of 150 or 200 liters, he says. "Because the tap water is heated directly from the heat pump, a coil in the vessel is not necessary. This has the advantage that much more hot tap water is available. In addition, the set temperature of 58.5°C is reached at every point in the vessel. As a result, the drainability of the storage vessel is much higher." Once a week, the hot water is heated to above 60°C, which means that resident comfort and (legionella) safety go excellently hand in hand. 

Construction info:
Developer Borghese Real Estate
Architect Powerhouse Company
Landscape Architect Peat Forest & Bosch
Contractor Bell Group
Owner/Operator CHP Eteck
Realization power generation plant Croonwolter&dros
Residential Installations Van Losser Installation Group
Heat pump supplier and post control Itho Daalderop