Ampt van Nijkerk

STULZ, partner for climate control, provided the restaurant of the Golden Tulip hotel Ampt van Nijkerk with a grid with air handling unit including heat pumps. Eric Veltman: "The installation is plug & play, everything is pre-assembled and adjusted. The installer has nothing to worry about."

Everyone has to participate in the energy transition. As a hotel, it is important to take a good look at the installations so that you can replace them at a natural time. The Golden Tulip Hotel Ampt van Nijkerk recently took a big sustainable step.

Located on the edge of the Veluwe, the hotel welcomes many guests each year. The hotel has 110 rooms, sixteen multifunctional rooms and facilities such as swimming pool, sauna and solarium and, recently, a new restaurant. With gas prices skyrocketing, you'd better have your energy management in good order.

The management of Ampt van Nijkerk recently decided to expand the restaurant area. STULZ account manager Eric Veltman: "The restaurant has been expanded with a large glass conservatory and now covers some three hundred square meters. A different way of cooling and heating was sought for the restaurant. Comfort for the guests is of course essential here. It should not be too hot or too cold, and drafts are completely out of the question."

The client's condition was that they would no longer be dependent on natural gas. Ampt van Nijkerk approached Klimaplan Klimaattechniek for an elegant solution. In consultation with STULZ, this was found in an air handling unit (lbk) including heat pumps. A plug-and-play solution for cooling, heating and ventilation.

Veltman: "We used the ClimaPac Compact range here. This consists of a unit mounted on a self-supporting frame. There are twelve lbk models with air volumes from 1,500 m³ to 14,100 m³. So for every project we can provide customization."

When an order for the Compact range comes in, the components are already prepared in the workshop in Hoofddorp. "When the frame comes in, everything is put on the frame, assembled, connected, tested and transported to the project."

The thermally broken system housing is composed of an aluminum frame and double-walled panels. It uses two Mitsubishi Heavy Industries heat pumps. Veltman: "This is because sometimes a heat pump has to run in a defrost cycle and then there is always a back up. Control-wise, we tuned and optimized the communication between the speed-controlled heat pumps and the lbk in the Madrid plant."

The restaurant in Nijkerk has a lot of glass, air treatment for optimal comfort is therefore essential. "The lbk provides the fresh air and the heat pumps provide heating and cooling. Post-regulation is done by a vrf system with cassette units in the ceiling. Air is blown in at about 18 degrees and if that is not enough, the vrf system automatically cools or heats up."

The simple manual was the reason for installer Klimaplan to choose ClimaPac Compact range from STULZ. The lbk is connected to the ductwork with a power supply attached. The controllers are preset so there is no need for commissioning afterwards. "Basically, the knob can be flipped, the heat pumps are released and the system is running," he says.

Whereas many suppliers struggle with timely delivery of heat pumps or air handling units, STULZ has little notice of this. Veltman: "Early last year, the decision was made to build a larger stock. We can go on for years. And it doesn't matter whether a grid has to be CO2-controlled or requires damping for noise. Everything is possible."

Meanwhile, the ClimaPac Compact range is also frequently finding its way into the School Domain. The prerequisite for a Fresh School is low energy consumption and a healthy indoor environment. The following are considered: energy, air quality, temperature, light and noise.

Schools use the Program of Requirements for Fresh Schools 2021. Here the requirements in the Building Decree on January 1, 2021 are used.
Eric Veltman: "In fresh schools, there are many requirements regarding filters and CO₂ concentration in the classroom. With sensors, we measure the CO₂ in the return duct. The installation acts on this and ensures a perfect indoor climate."

Limiting noise is important in Fresh Schools. You have to deal with noise that enters the building as ambient noise. That is why sound absorbers are used for the ducts. Veltman: "You sometimes have to go down to 35 dB and that's particularly low for this kind of installation. But for the Compact range, that's not a problem."

ClimaPac Compact

Taking into account that 80% of the units demanded by the market cover up to 15,000 m³ / h, STULZ has opti-mized the range, developing the ClimaPac Compact series with new configurations and more compact sizes to adapt to these requirements, offering a quick response in the market.