Question Bank • QB_APE_EXP_051 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Storage Systems

Subtopic: Perishable food storage

Question Statement:

A cold storage facility stores $10,000\text{ kg}$ of potatoes. The heat of respiration of potatoes at $4^\circ\text{C}$ is $20.0\text{ W/tonne}$. The heat load generated per day solely due to respiration in kilowatt-hours ($\text{kWh}$) is ________ (round off to 1 decimal place).

Answer Key:

4.8

Step-by-Step Solution & Explanation

1. Stored mass $M = 10,000\text{ kg} = 10.0\text{ tonnes}$. 2. Continuous respiratory heat rate $P$: $P = 10.0\text{ tonnes} \times 20.0\text{ W/tonne} = 200.0\text{ W} = 0.20\text{ kW}$ 3. Daily heat load in $\text{kWh}$ ($24\text{ hours}$): $\text{Daily Energy} = 0.20\text{ kW} \times 24\text{ h} = 4.80\text{ kWh}$
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