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<br />, --r. <br />L:.J ~\ ,~...:.; <br /> <br />Johnson Powerplant For"bay <br /> <br />Average depth = 10' - 200 e.f. <br /> <br />Rate of heat loss/hr. = <br /> <br />( 2 f 3. 75) x 62 xl) <br />10 x 62.4 <br /> <br />= <br /> <br />358.8 <br />624 <br /> <br />= 0.575 B.t.u./hr. <br /> <br />Q = 600 c.f.s. = 49.6 a.f./hr. <br /> <br />200 <br />49.6 <br /> <br />= 4.03 hrs. = time required for exchange of <br />water in reservoir <br /> <br />4.03 x 0.575 = 2.32 B.t.u./1b. heat loss from <br />water in reservoir <br /> <br />15 <br />