# Output Examples

Output/Km calculated from capacity of to move vapour with 5 m2 wind funnels every 100m collecting 10 Km/h wind | ||||

Seawater temp and water vapour l/m3 heated air if saturated | Condenser temp and water vapour l/m3 air | Yield l/m3 air flow | Yield ; litres/Km Channel | |

Day | 70°C, 0.20 l/m3 | 30°C 0,03 l/m3 | 0.17 l/m3 | 85,000 l/Km/h = 850,000 l/day/Km |

Night | 60°C, 0.13 l/m3 | 22°C 0,02 l/m3 | 0.11 l/m3 | 55,000 l/Km/h = 770,000 l/night/Km |

Daytime Output /Km Calculated From Solar Energy @ 4200kJ/h/m2 acting on 10m wide simple seawater channel. | ||||

Sunlight and shade temp. | Heating Effect of 4,200 kJ/ m2/h Heat Capacity 4 kJ/l/°C | Evaporating Effect | Effect of humidity of incoming air | Output capacity. The effect of saturated air in stopping evaporation |

25°C Day mean solar radiation of 4200 kJ/h | Water 20 cm deep Would increase in temp by 5°C /h. if all heat were transferred to the water in a closed system (eg black pipe) | Absorption of 4200 kJ evaporates 1.7 l/m2/h Cooling effect of evaporation under air layer opposes temperature rise. High saturation above water slows evaporation rate | At a relative humidity of 70% and daytime temp of 35°C air would contain 0.04 l/m3 | In a closed system, with no air flow, output is stopped at about 5 l/m2/day. With air flow carrying vapour to condenser, output based on solar irradiation has a maximum rate of 170,000 l/Km./ 10h day. |

Absorption of heat in a closed supply pipe allows increase in temperature and continuation of evaporation at night. In a flat bed evaporating chamber high humidity of incoming air inhibits evaporation so that more of the solar radiation is used to increase the temperature of the seawater, again increasing the contribution of distillation into the cold night time condenser.

In practice the daytime evaporation rate will be less than the maximum of 1.7 l/m2/h . At a daytime rate of 1.2 l/m2/h or 120,000 l/Km./ 10h day, with some solar energy acting to increase seawater temperature distillation will continue at night. In desert conditions, condenser temperature may easily be as low as 5°C (saturated vapour content of 0.006 l/m3 ), with correspondingly increased efficiency of condensation at night. At 0.6 l/m2/h over 14 h this would contribute 80,000 l/Km./ 14h night, for an overall output of 200,000 l/Km/d (73 megalitres / Km /y).