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Electrical Machine Design by V. S. Nagarajan, V. Rajini

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3.23 Design of Tank with Tubes

Dissipating surface area of tank =St
Dissipating surface area of tubes = xSt
Total loss dissipation in surface area of tank =12.5 StW/°C
Total loss dissipation in surface area of and cooling tubes =(12.5+8.8 x)St W/°C
Total loss dissipition by tubes due to convection =1.35 × 6.5 xSt
= 8.8xSt W/°C
Total surface area of walls of tank and tubes = St + xSt
= (1 + x) St
img

Temperature rice with tubes,

img

From the above equation, area of tubes can be found as follows.

Total area of tubes,

Length of a tube = lt

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