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研究得到了太阳能空气饱和蒸馏器在稳态情况下和不同海水加热温度下的蒸发速度实验式:lgD=7.062+3.446t_0海水加热温度是影响淡水产量的主要因素,以46.2℃为转折,超过此温度,蒸发速度急促增加。液-气两相重量流量比(W/G),必须与海水加热温度相适应。温度较高,(W/G)值也应较大,这样才能最大限度地提高产水量和降低产水的耗热量。当t_0=96℃时,(W/G)_(最佳)=12;当(W/G)=11时,t_(0最佳)=90℃。在一般太阳辐射条件下,t_0=60℃,(W/G)=1.67—3.0时,热耗值最低。过多地通入空气是空气饱和蒸馏器动力消耗较大的重要原因。在适当工况下进行操作,所需空气量较小。这样,不但产水量高、热耗值低、系统阻力减少,而且能耗大幅度降低。 模拟试验表明:太阳能空气饱和蒸馏器在太阳辐射日总量4500〔千卡/米~2〕时,每平方米集热器面积,每日可产淡水5—7公斤,所需翅片冷凝器换热面积为0.21〔米~2/时·公斤淡水〕。
The experimental results show that the seawater heating temperature is the main factor affecting the freshwater yield, and 46.2 ℃ is the turning point, beyond which the evaporation rate of the solar air-saturated retort under steady state and different seawater heating temperature is Temperature, evaporation rate increased rapidly. Liquid - gas two-phase weight flow ratio (W / G), must be adapted to the seawater heating temperature. Higher temperature, (W / G) value should also be larger, so as to maximize water production and reduce water consumption. (W / G) _ (best) = 12 when t_0 = 96 ° C; t_ (0 best) = 90 ° C when (W / G) = 11. Under the condition of normal solar radiation, the value of heat consumption is the lowest when t_0 = 60 ℃ and (W / G) = 1.67-3.0. Too much air into the air saturated distiller power consumption is more important reason. When operating under the proper conditions, the amount of air required is small. In this way, not only high water production, low heat consumption, reduced system resistance, and significantly reduce energy consumption. Simulation tests show that when the solar air-saturated distiller has a total solar radiation day of 4500 [kcal / m ~ 2], the collector area per square meter can produce 5-7 kg of fresh water per day. The required fin condenser Heat exchange area of 0.21 [m ~ 2 / h · kg of fresh water].