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• Practical Action/porting
  developing countries --LeissKG 09:29, 19 September 2007 (PDT) Rural lighting Ported to Rural lighting (original) and Rural lighting --LeissKG 06:56, 22 September
  29 KB (3,016 words) - 21:14, 13 April 2024
• Refrigeration for developing countries
  100 kg of ice per day can be produced for £4,000 (including the cost of highly efficient solar thermal panels), giving an ice cost of £0.03 per kg. Where
  23 KB (2,834 words) - 03:00, 29 February 2024
• Energy from the wind
  velocity (v) is in m/s, then at sea level (where the density of air is 1.2 kg/m3) the power in the wind is: Power = 0.6 x v3 Watts per m2 of rotor swept
  10 KB (1,454 words) - 17:55, 29 January 2024
• Evaporative cooling (Practical Action)
  build a chamber of the size shown in Figure 3 which has a capacity of about 100kg. A covering for the chamber is made with canes covered in sacking all mounted
  16 KB (2,568 words) - 22:00, 24 January 2023