A freezer panel of area 0.80 m² separates an interior at −18 °C from room air at 22 °C
PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
A freezer panel of area 0.80 m² separates an interior at −18 °C from room air at 22 °C. To meet efficiency standards, the conductive heat-loss rate through the panel must not exceed 60 W. If the panel is filled with polyurethane foam (thermal conductivity 0.025 W m⁻¹ K⁻¹), calculate the minimum thickness required, in centimeters (two significant figures).