22 // End User
According to Beerten’s calculations, the current setup was the best option, as space heating and cooling is generally responsible for the majority of a building’s energy consumption. It also had the highest payback for the end user and was the most environmentally friendly solution, Beerten argues. For Koch, trust played a key role in following Beerten’s recommendations. ”I looked over it and said [to Beerten], if you say this is the best option, I will go for it,” he said. The return on investing in the TripleAqua will be four years, according to Van Hulle. Beerten has made a theoretical calculation comparing it to his work in the other Corbie hotel, where he installed a different heating and cooling system. “It’s [around] 50% more efficient,” he told Accelerate Europe. Beerten also praises the uniqueness of the system. “We can take heat from the south [which has glass windows that warm up the reception area] and [redistribute] it to the north side,” which does not get as much sun during the colder winter months. “We [also supplied] the hotel [with a balanced] ventilation system,” Beerten says. In a balanced ventilation system, a network of ducts throughout the building supplies air to vents in each room without the different airflows crossing each other and recovers air through a heat exchanger. “This allows us to recover warm air during the winter and cool air during the summer,” Beerten says. Also, “during the winter the water is stored for later heating [in the system] and can also be used later as heat,” he notes. An important aspect of the system is its low-temperature lift. Most heating systems use radiator pipes at temperatures of up to 70°C, according to Beerten, but rooms can be heated efficiently with under-floor water pipes at lower temperatures. The TripleAqua generally heats and cools the three water pipes to return ambient temperatures ranging from 28-36°C and 12-16°C. “We told [Koch] to keep the rooms at 18°C” as standard, and then let the customer change the temperature through a small panel in their room to what they want,” Beerten says.
Hotel owner Jan-Baptist Koch
This system is not the only environmental technology employed in the hotel. Beerten recommended collecting rainwater to use in the toilets and elsewhere.
Another installation? Koch is also expanding the family business: “We [may start building] a new hotel in the summer.” The TripleAqua could also be installed there. Koch has been pleased with it so far and plans to add a page on the system’s environmentally friendly credentials to the hotel guide that he is writing. “We will convince them to install the TripleAqua [again],” Beerten says. “We think it’s the best solution for a hotel.” CM
Accelerate Europe // Summer 2018
HEINEKEN: CHEERS TO A GREENER WORLD!