[freebeard]

Maybe it's time to try solar chimneys?

www.mdpi.com: Solar Chimney Components: Construction and Materials

Figure 6. (a) Glass roof of the prototype plant at Manzanares, Spain [18]; (b) the collector design [5].

The majority of the solar radiation passes through the collector, and a fraction of the radiation is directly absorbed by the system’s air. The soil and the system’s air emit long-wavelength radiation due to the solar radiation that is absorbed and trapped, and due to the collector, which is almost opaque to this long-wavelength radiation (transmittance 0.01), generating a greenhouse effect. The radiation effect under the collector increases the system temperature (Figure 6b and Figure 7a) [5]. Continuous heat transfer occurs between the collector, the system’s air, and the ground (Figure 7b) [19].

Power and vegetables from a single source. Until it snows?