What is the minimum surface temperature required for a solar chimney and for an AVE?
The temperature differential at the base of Manzanares solar chimney was typically 20C. A solar chimney 5 times as high (1000 m high) would need a temperature differential of 4C to produce the same power. The frictional losses in the Manzanares chimney were less than 10% of the ideal work and could be kept to the same level by a slight increase in chimney diameter. The temperature of sandy soil during periods of insolation can be 30C higher than the temperature of the air at the 10 m level. The temperature of air at the 0.3 m level can be 15C higher than the temperature of the air at the 10 m level. The temperature of the air rising in dust devils can be 5C higher than the temperature of ambient at the 10 m level. Dust devils can reach heights of 2000 m or more. Naturally heated air rising in a 2000 m solar chimney or in a dust devil could produce as much work as air heated in a greenhouse can produce in a 200 m solar chimney.
Related Questions
- What is the relationship between the height of the solar chimney and the height of the vortex in an AVE and the air temperature at their bases?
- What are the advantages of the AVE (Atmospheric Vortex Engine) compared to a solar chimney?
- What is the minimum surface temperature required for a solar chimney and for an AVE?
