I think it may come back in about 10 years coupled with a solar thermal collector. https://www.chalmers.se/en/departments/chem/news/Pages/Emissions-free-energy

I think it may come back in about 10 years coupled with a solar thermal collector. https://www.chalmers.se/en/departments/chem/news/Pages/Emissions-free-energy-system-saves-heat-from-the-summer-sun-for-winter-.aspx https://www.chalmers.se/en/departments/chem/news/Pages/Emiss...