Not air con, but a cooling curtain
Mario Stucki, doctoral student at the Functional Materials Laboratory, has developed an alternative to electrically powered air conditioning: a cooling curtain made of a porous membrane.
Climate change is leading to ever higher temperatures and aridity in many areas, making efficient room cooling increasingly important. An ETH doctoral student at the Functional Materials Laboratory has developed an alternative to electrically powered air conditioning: a cooling curtain made of a porous triple-layer membrane.
Read more about the system in the article by ETH News
Also external pagewatsoncall_made and external pagephys.orgcall_made have reported on the cooling curtain.