Page 423 - Handbook of Energy Engineering Calculations
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4. Determine the heat loss from the pot
Use Fig. 7 to determine the heat loss from the pot. Enter at the bottom of Fig.
7 at 750°F (398.9°C), and project vertically upward to the 10-in (25.4-cm)
diameter pot curve. At the left, read the heat loss at 7.3 kWh/h.
FIGURE 7 Heat losses from melting pots. (General Electric Co.)
5. Compute the total heating capacity required
The total heating capacity required is the sum of the individual capacities, or
2.98 + 1.752 + 0.708 + 7.30 = 12.74 kWh. A 15-kW electric heater would be
chosen because this is a standard size and it provides a moderate extra
capacity for overloads.
Related Calculations. Use this general procedure to compute the capacity
