Question

please answer 4.4 in clear way

M PURUL UL Hiver water. This is more expensive, but in some areas it is environmentally preferable.) At what rate must the water evaporate? What fraction of the river must be evaporated? Problem 4.4. It has been proposed to use the thermal gradient of the ocean to drive a heat engine. Suppose that at a certain location the water temperature is 22°C at the ocean surface and 4°C at the ocean floor.

Answer 1

Solution 4.4) This Cannot Engine working between 220 and 4°c working Thow = 4°C = 277K Thigh = 22°6 = 295k Efficiency of Cannot Engine n = 1 - 7 Id = 1 - 277 295 18 295 = 0.062 Efficiency lions percondage) = 0.1% Warut Oin . Olin - O oua din - 1GW O in law Qin = 0.001 =) din = 16.38 GW

In One second Qin = 16.38×108J oin = mSAT 16:38 Xlor = mx 4.18 < (22-4) 16.38x106 = mx 4.18 X 18 -) m = 16-38 X 105 48 x 18 m = 217.8 kg