Carbon heat pumps smart option for hotels in cold climates
Research suggests that the hotel industry could save energy by installing CO2 heat pumps. Image credit: Colourbox
Energy consumption in the hotel industry is high and contributes to global warming.
The researchers studied energy consumption, available energy sources and heating systems in the hotel sector over a period of five years.
You have gained two important findings from a new study:
- Hotels with heat pumps use 20 percent less electricity for heating per square meter.
- CO2 heat pumps in hotels can reduce heating and cooling requirements by up to 60 percent.
Greener energy systems
In the past five years, almost 20 percent more hotels have had access to district heating to replace electricity or oil heating. This is a positive step towards reducing greenhouse gas emissions.
“However, we still have a long way to go when it comes to energy consumption in hotels,” says Silje Marie Smitt, Ph.D. Candidate in the NTNU’s Energy and Process Engineering Department at the 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 their primary heat source use significantly more energy than hotels that use heat pumps. This is because heat pumps don’t generate heat, but upgrade heat from a low to a higher temperature,” she says .
All-in-one system offers high efficiency
As part of this study, the researchers examined two hotels that were equipped with integrated CO2 heat pumps with heat storage. These systems provide all of the thermal heating and cooling of the hotel building, including the heating and cooling of the rooms and hot water.
“The potential of such all-in-one systems is enormous, as you can recover heat from parts of the hotel that need cooling and then use the heat pump to convert or raise the temperature into useful energy. Here’s how we can Achieve high efficiency and lower energy consumption. The systems with all-in-one CO2 solutions show a strong reduction in energy consumption and the associated greenhouse gas emissions, “says Smitt.
Calculation of the increasing energy demand for cooling
S. Smitt et al., Energy consumption and retrofit potential of heat pumps in hotels with cold climates, Journal of Cleaner Production (2021). DOI: 10.1016 / j.jclepro.2021.126799 Provided by the Norwegian University of Science and Technology
Quote: Smart option for carbon heat pumps for hotels in cold climates (2021, May 25), accessed on May 25, 2021 from https://techxplore.com/news/2021-05-carbon-smart-option-hotels-cold .html
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