| Summary: | The thesis project aims to investigate and analyze existing heating and cooling systems in public places and homes in Nordic countries from energy consumption aspects, and suggest possible optimized solutions to reduce their energy consumption. It was conducted, in particular, based on an average sized grocery store on Åland. The investigation and analysis have shown that the consumption of district heating was causing a high and unnecessary bill. Through a few coarse adjustments of control parameters in the control software for the cooling and heating system, we could maintain a lower consumption of district heat by 13%. These adjustments are just the beginning of what has been accomplished in terms of optimization. This is pleasing in the short term, but it is hard to certify if the changes will maintain the satisfying results under a longer period. For improvement and further work for optimization, data over a longer term, preferably a couple of months and most preferably one year, are needed. The data on temperatures for both setpoint and actual value may be logged every minute to get good and soft trend lines to follow. With trend lines for both inheritance and setpoint, optimized regulation can be made.
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