Allied & ICAR Exam Bank • ALLIED_1271 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Psychrometry and Grain Drying

Subtopic: Sensible Heat in Drying

Question Statement:

Dry air of mass flow rate $2.0\text{ kg/s}$ is heated from $25^\circ\text{C}$ to $55^\circ\text{C}$ in a grain dryer air heater. Taking humid air specific heat $c_p = 1.005\text{ kJ/(kg}\cdot\text{K)}$, the heating energy required in kW is:

Answer Key:

60.3

Step-by-Step Solution & Explanation

$Q = \dot{m} c_p \Delta T = 2.0 \times 1.005 \times (55 - 25) = 2.010 \times 30 = 60.30\text{ kW}$.
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