Research on A New Technology Integrated Low-cost, Near-zero-energy Solar Greenhouse

This investigation was performed to improve the traditional greenhouse from the high costs, poor performance of heat preservation, low efficiency of solar collection, additional heating, brick structure, damages on farmland to low cost and high performance in Heilongjiang Province, China. The main objective of this researcg is to develope a more adoptable greenhouse with the outstanding economic, efficient and suitable advantages. Researchers has designed and developed this new solar greenhouse. The main technical measures include internal and external insulation envelope using reflective aluminum knitting film; the ecological water circulation system for solar heat storage and collection, and geothermal energy utilization. In addition, the other technologies such as the assembled arch structure of broken line, the roof air vents for ideal condition of carbon dioxide, air temperature and humidity both in summer and winter are also applied on the rhe greenhouse. Benefited from technology integration above, the experimental greenhouses and demonstration projects showed that they can realize 13 °C of minimum Indoor temperatures and 16 °C of ground temperature while -30 °C of outdoor temperature in winter. It was concluded that the new solar greenhouse without artificial heating can achieve nearly zero net energy besides a few energy consumption for water circulation and ventilation, which is very suitable for the Low-income farmers to engage the cultivation of mushroom, vegetable and fruit, animal husbandry in the severe cold region of China.