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B. Wattage required to maintain operating temp. with the addition of material.
| Equation VI | Weight of Material added per hour |
X | Specific Heat |
X | Temp. Rise |
= KW |
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| 3412 | ||||||
| Equation VII | Weight of Material added per hour |
X | Heat of Fusion of Vaporization |
= KW |
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| 3412 | ||||
| Equation VIII | VI + VII | = | additional KW required to maintain operating temp. with material being added. |
In heating tanks the heat up is calculated by following the steps below:
| STEP ONE: | Determine the wattage required to heat the solution up to the desired temperature. Temperature difference is the difference between the desired final tank temperature and the ambient. (See wind velocity for more information.) (EQUATION I) |
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| STEP TWO: | Determine the heat of fusion or vaporization if needed. The heat of fusion is the KW required to change a solid into a liquid (example: Ice to Water) and the heat of vaporization is the KW required to change a liquid into a gas (example: Water to Steam). (EQUATION II) |
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| STEP THREE: | Now total the above steps and determine the allowed time for heat up. When Equation III is completed you will have the wattage required to heat the solution to the desired temperature in the allotted time. (EQUATION III) |
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| STEP FOUR: | We are now ready to estimate the surface losses of the tank and the exposed solution surfaces. Refer to graphs 1 & 2 for the surfaces of the tank and graphs 3, 4 & 5 for the surface of the solution. Additional information to assist you in determining the square footage is located on page 90. (EQUATION IV) |
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| STEP FIVE: | With the addition of equation III and IV plus a safety factor you have the total KW required for the heat up and to maintain tank losses. (EQUATION V) |
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