YANMING WEI’s Post

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CEO at Kiwaho Lab of Energy & Ecology Inc.

#Technology of harvest cold #energy in frigid countries, e.g. #Russia. With tandem cooperation of Pressure Retarded forward #Osmosis (PRO) #power generation, not only hot is energy, but also cold, because at frontend of tandem, either hot or cold can re-concentrate the diluted exhaust of backend. As #water evaporation heat 2.4MJ/kg is 7x fusion heat 0.33MJ/kg, therefore cold energy #efficiency of heat-to-work is 7x higher. #Winter #wind speed is far higher than summer, it credits more higher areal power density, because chilling effect enhances the heat transfer coefficient, easy >> 10 w/m^2/K, so as to quicken icing rate. In -30 °C deep winter days, #ice thickness growth rate 10 cm/d is possible, & it means the fulltime continuous harvestable power density 52 w/m^2 pond, many folds of summer time! The thicker the ice sheet, the lower the followup icing rate, as ruled by itself insulation. So to keep high output, labor should input to rake out ice sheet & dump in crushed ice pit by a reasonable plan; #Robot automation can save labor cost to do same job. No worry drinkable ice in pit, let it melt by summer #solar. In #Canada, easy accumulate 1.5m by multi-batch harvests, even Rideau canal natural skating rink 60cm. 1m thick = 15 kwh/m^2 Detail: http://kiwaho.com/eb

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