# Estimate the time when the temperature at the geometric center of a 6 cm Example 4.26 diameter apple held in a 2°C water stream reaches 3°C. The initial uniform temperature of the apple is 15°C. The convective heat transfer coeffi cient in water surrounding the apple is 50 W/(m 2 °C). The properties of the apple are thermal conductivity k 0.355 W/(m °C); specifi c heat cp 3.6 kJ/(kg °C); and density ρ 820 kg/m 3 .

Question-AnswerCategory: Food EngineeringEstimate the time when the temperature at the geometric center of a 6 cm Example 4.26 diameter apple held in a 2°C water stream reaches 3°C. The initial uniform temperature of the apple is 15°C. The convective heat transfer coeffi cient in water surrounding the apple is 50 W/(m 2 °C). The properties of the apple are thermal conductivity k 0.355 W/(m °C); specifi c heat cp 3.6 kJ/(kg °C); and density ρ 820 kg/m 3 .

Estimate the time when the temperature at the geometric center of a 6 cm Example 4.26
diameter apple held in a 2°C water stream reaches 3°C. The initial uniform
temperature of the apple is 15°C. The convective heat transfer coeffi cient in
water surrounding the apple is 50 W/(m 2
°C). The properties of the apple are
thermal conductivity k 0.355 W/(m °C); specifi c heat cp 3.6 kJ/(kg °C); and
density ρ 820 kg/m 3
.