The cooling is often achieved via a refrigeration cycle, but at times evaporation or free of charge cooling is employed. Air conditioning techniques will also be made based upon desiccants (chemical substances which eliminate dampness within the air). Some AC programs reject or retail store warmth in subterranean pipes.[two] Contemporary https://drive.google.com/drive/folders/1DwQcVWGr5RtTFleX78g087Tcbb3eCLQO