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Work on Gnosjö Automatsvarvning’s property automation – which focuses heavily on data collection from climate control, ventilation, and heating systems – made significant progress in 2024. But it’s a process that’s never truly finished.
”No, it never really gets finished. What started as a project has become an ongoing process of continuous change. The idea of energy optimisation is that there’s always room to improve a little more. Plus, the external conditions are constantly changing.”
Gustav Kjellin, industrial electrician at Gnosjö Automatsvarvning, began gathering data back in 2022. In 2023, he installed about a kilometre of network cable to get computers, measurement points, and programs to communicate with each other and the system’s main computer. Last year, they started to reap real benefits from this work.
”We collect the data, which is logged in a database. Then it’s visualised so that we get easy-to-read, comparable bar charts and graphs. The main purpose is to compare different time periods based on the improvements we’ve made and continue to make. Now, we can compare measurement points over time to see if we’re working as efficiently as possible or if any curve behaves strangely.”
Gustav explains that they save all data even if it’s not immediately useful.
”You never know what you’ll want to do in the future. We might come up with something clever, and then it’s good to have the data. But right now, we’re focusing on making the system as stable as possible. There are always little bugs to fix, and it’s easier to take the next step with a solid foundation.”
They also collect and use weather data — wind speed, rain, snow, and temperature — measured by a weather station. This data controls, for example, how fire and ventilation flaps open and close to regulate temperature and create a good indoor climate. The weather station has been fine-tuned over the year. It’s now able to distinguish between rain and snow. When it rains, roof windows can stay open since they’re protected by canopies above, but snow can blow under these covers.
”Still, not everything can be fully automated. Indoor temperature might suggest opening windows, but if we know it’s going to get really cold a few hours later, it’s better to keep it a bit warmer for a while. Letting heat out only to produce heat again shortly after isn’t sustainable,” Gustav concludes.
