Smart CO2 heat pump option for hotels in cold climates – Eurasia Review


The energy consumption of the hotel industry is high and contributes to global warming.

Researchers have been studying energy consumption, available energy sources and heating systems in the hotel industry for the past five years.

They drew two important conclusions from the study:

  • Hotels with heat pumps consume 20% less electricity for heating per square meter.
  • CO2 heat pumps in hotels can reduce heating and cooling requirements by up to 60%.

Greener energy systems

Over the past five years, almost 20% more hotels have had access to district heating to replace electric or oil heating. This is a positive step in terms of reducing greenhouse gas emissions.

“However, we still have a long way to go when it comes to energy consumption inside hotels,” says Silje Marie Smitt, PhD student in the Department of Energy and Process Engineering at the University of Norway. of Science and Technology (NTNU) at NTNU. She works with research colleagues at NTNU, Sintef and the Technical University of Denmark (DTU).

“Studies show that hotels that use district heating as the primary heat source consume much more energy than hotels that use heat pumps. This is because heat pumps don’t produce heat – instead, they improve heat from a low temperature to a higher temperature, ”she says.

All-in-one system offers high efficiency

As part of this study, the researchers studied two hotels equipped with CO2 heat pumps with heat storage. These systems provide heating and thermal cooling for all hotels in the building, including room heating and cooling and hot water.

“The potential of ‘all-in-one’ systems like this is huge, as you can recover heat from parts of the hotel where cooling is needed, and then improve or raise the temperature with the heat pump for energy. useful. This is how we can achieve high efficiency and low energy consumption. All-in-one CO systems2 the solutions show a significant reduction in energy consumption and associated greenhouse gas emissions, ”explains Smitt.

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