Solar chimney can be used to dry agricultural products, foodstuffs, bio residues. One of the problems with bio-residues is its high moisture content. This present work aims at studying the effect of new type of solar chimney for drying goat waste. The experiments were conducted by natural circulation mode as well as forced circulation mode with chimney area of 0.342 m2. The experiments were also repeated with fixing radial fins at the outside of the chimney.