A visual system with the capacity of 0.16m3 has been built up to investigate the cool storage with the HCFC-141b hydrate as the cool storage medium. The experimental results indicate that agitation has significant effect on the formation of gas hydrate. Even with the low supper-cooling degree

the hydrate can be formed with continuous agitation. The cool storage capacity increases and the formation is easier with the increasing flow or decreasing medium temperature. While the spraying and the history of gas hydrate has little effect on the formation temperature and cool storage capacity.