The formula to calculate the sensible heat in a biomass furnace is:

\[ Q_s = M \cdot C_p \cdot (T_f - T_i) \]

Where:

• \(Q_s\) is the sensible heat in KCal.
• \(M\) is the mass of material in kilograms (kg).
• \(C_p\) is the specific heat of material in KCal/kg-C.
• \(T_f\) is the final temperature of material in degrees Celsius (C).
• \(T_i\) is the initial temperature of material in degrees Celsius (C).