Developing research on a fully passive solar lumber drying apparatus – Creation of a new concept and establishment of a soft technology

Looking through the past research works again, a new effect created in combination of a few old techniques was noticed. One main technology; a transparent hot house for passive solar radiation collection, and two elementary techniques; a carbon fiber sheet (CF-sheet) of excellent absorber for solar radiation incidence and an insulated cylinder for passive exhaustion of moist air inside of the house were unified altogether, and so a fully passive solar lumber drying apparatus could be established practically as a soft technology of lumber drying.