What is the Beijing solar heating greenhouse project?

The Beijing Solar Heating Greenhouse Project is a demonstration project including 12 pilot modern greenhouses with coverage of 520 m 2 solar collectors . Through the solar heating system, the average temperature can be increased by 4–5 ℃.

Are China's solar greenhouses a good investment?

A promising prospect is shown by China's modern solar greenhouses at present levels of performances and costs exemplified by the photovoltaic (PV) greenhouses with a practicable payback period of less than 9 years.

How big are PV greenhouses in China?

It is indicated by Table 2 that the overall installed capacities of PV greenhouses in China have ranked tens of megawatts, and several already reached 50 MW. The Lu’an 50 MW PV greenhouse project is the largest on-grid in current, which covers an area about 167 ha and the investment amounts to 74,870,000 $.

What is the economic evaluation of solar greenhouses in China?

3.2. Economic evaluation The economic evaluation including the cost, operating income and the payback time of the combined agriculture and solar system sectors is conducted to assess the potential of the application of modern solar greenhouses in China.

Are there solar thermal greenhouses in China?

There are also some other solar thermal greenhouses that have been applied in China's Beijing, Gansu, Xizang, etc. These greenhouses utilize heat-absorbing solar collectors accessed with circulation tubes to heat water for night space heating purpose.

How a PV system can be used in a greenhouse?

By placing PV systems on roof top or integrating to greenhouse structure, the large availability of surfaces taken up by greenhouses is able to grow agricultural products below while producing self-consumed energy on the top, which allows the multifunction role of one land .