Study on the Energy Conservation of Huabei Type Multispan Plastic Greenhouse and Its Practice

Huabeitype multispan plastic greenhouse have some effective energy saving methods. It is doublewalled pumping insulation plastic films roof,thermal screens, earthpipes heat exchanging system,and energystoraged gable.The temperature in house is more than 8 in winter ,and the temperature difference between the outer and inner of the house is more then 11. The reduction in energy cost of the house is significant.