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<br />(J lJ ..~ ,j ,; ~ \ <br /> <br />TlllI4PEllATURE CHANGE OF RUNNING WATER IN A CAliAL <br /> <br />I'/ow <br />. <br /> <br /> <br />_(9 <br />,: <br /> <br />Ambient ~ eo <br />./e..Ae <br /> <br />~ <br /> <br /> <br />I <br />I <br /> <br />-;.- --------- --- <br />I <br />, <br /> <br /> <br />I <br />I <br />.;------ <br />I <br />I <br />I <br /> <br />I <br />I <br />-,- <br />, <br />, <br />, <br /> <br />J-- J <br />I I <br />, , <br /> <br />I <br />-}--- <br />I <br />I <br /> <br />x=o <br />o=eo <br /> <br />I & I I t I <br />r-~X -1 <br />X<il' -Z=Z-f.,dX <br /> <br />;t. = l <br />G= O. <br /> <br />Consider a crost sectionAl lamina of 1ntinitesmal thickDsts.t;. <br />as it lIoves frOlll x to X" A x. The exposed surface o'f thie llllllina <br />18 at the free vater surface and ie eltusl to bt (tlt. n.). The unit <br />rats of heat loss is then <br /> <br />~: = !be!: ( 0a - e ) <br /> <br />where <br /> <br />~H = incremsnt of heat addsd (B.t.u.) <br /> <br />.A t = increment of time (houri) <br />f = surface film oonductanoe B.t.u./hr. x ft.2 x OF <br />E) = temperaturs of fluid at an7 point (OF) <br /> <br />.' <br /> <br />Ga = B.1Ilbient air tellperature <br /> <br />1 <br />