The blog owner T E Miller (Swayseeker), known as Eddie will not accept liability or responsibility for any problems arising from the use of this blog and its calculations. I try to provide good calculations and analysis, but cannot guarantee that there are no mistakes. Here is a site that tells you how to build your own solar air heater:
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Have been doing the following calculations: Los Angeles (latitude 34.05 deg N) has a maximum (always facing the sun) 11.2 kWh of solar energy per square metre on a good day on 1 July. On a horizontal surface it has 8.8 kWh of solar energy per sq metre per day (assuming a sunny day). It takes about 1.2 kJ of solar energy to heat 1 cubic metre of air 1 deg C (volumetric heat capacity of air is about 1.2 kJ per cubic metre per 1 deg C temperature rise - depends on pressure, etc). I have done this for the first day of each month and give a graph of how much air could be heated 5 deg C by one sq metre of horizontal surface by solar energy in one day. These are theoretical values and solar air heaters are certainly not 100% efficient, but the volume is enormous. I have been promoting this idea in Africa, China, US, India, via the Internet, etc, and am hoping it will have a good effect on the world.
If people generally knew the following facts about air the world might have been been different:
Air is very little affected by radiation (sun shining through it, radiation from fires, heaters and so on). But air is heated by coming into contact with hot surfaces (casing of heaters, hot tar and so on) and the hot ground heats air and causes upward movement of this less dense air on a grand scale. The ground only has fairly superficial contact with air. On the other hand a solar air heater (a sort of greenhouse with a solar absorber to heat up in the sun and large hot surfaces to make contact with the air) is a different matter - it will heat air efficiently and a solar air heater on each rooftop could get warm air rising and out of polluted cities and also cause more rain to fall when vapour condenses in the cooler regions.
People make their own solar air heaters and I believe India and China, with their pollution, could get polluted air moving out of their cities with them. It takes about 1.2 kilojoules of solar energy to heat 1 cubic metre of air by 1 degree C and every second 0.8 kilojoules of solar energy can easily fall on every square metre of some locations at noon.
The graph shows the number of cubic metres of air in a day that can theoretically be heated 5 deg C, using solar energy falling on a square metre of horizontal surface in Los Angeles. The x-axis shows 1 July, 1 Aug, etc.
Wikipedia says that rain dust (alkaline rainfall deposits, caused by particles from Saharan dust, etc) could help combat acid rain.
An idea of mine: If one had huge solar air heaters and put Saharan dust in them, the hot air could carry the alkaline dust into sulfur dioxide-polluted air and neutralize acidity.
Wikipedia also says," Acid rain does not directly affect human health. The acid in the rainwater is too dilute to have direct adverse effects. However, the particulates responsible for acid rain (sulfur dioxide and nitrogen oxides) do have an adverse effect. Increased amounts of fine particulate matter in the air do contribute to heart and lung problems including asthma and bronchitis."
Therefore the rain itself is good, because sulfur oxides, etc, are washed out, improving health prospects (reducing asthma, etc). Rain also washes out ozone, so if one could neutralize rain and get more rain, that would generally be good.
Graph below: The number of cubic metres of air in a day that can theoretically be heated 5 deg C, using solar energy falling on a square metre of horizontal surface in Los Angeles. The x-axis shows 1 July, 1 Aug, etc.