A hotplate is being used to heat up a pot of liquid vegetable stock. The stock has an average boiling. temperature of 107 °C) whilst the hotplate is maintained at 240 °C). The pot is made of stainless steel with a thermal conductivity of 100 W/(m. K), and its base has direct contact with the heated hotplate. This base is 20 mm thick and has an area of 0.8 m², with a convective heat transfer coefficient to the soup of 1000 W/(m². K).
A hotplate is being used to heat up a pot of liquid vegetable stock. The stock has an average boiling. temperature of 107 °C) whilst the hotplate is maintained at 240 °C). The pot is made of stainless steel with a thermal conductivity of 100 W/(m. K), and its base has direct contact with the heated hotplate. This base is 20 mm thick and has an area of 0.8 m², with a convective heat transfer coefficient to the soup of 1000 W/(m². K).
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Transcribed Image Text:A hotplate is being used to heat up a pot of liquid vegetable stock. The stock has an average boiling
temperature of 107 °C) whilst the hotplate is maintained at 240 °C). The pot is made of stainless
steel with a thermal conductivity of 100 W/(m. K), and its base has direct contact with the heated
hotplate. This base is 20 mm thick and has an area of 0.8 m², with a convective heat transfer
coefficient to the soup of 1000 W/(m². K).
Calculate the following:
The conductive resistance of heat flow through the pot:
K/W
The convective resistance of heat flow from the pot surface to the soup:
K/W
The total resistance of heat flow from the hotplate to the soup:
K/W
The value of 1/UA for the heat flow from the hotplate to the soup:
K/W
The total rate of heat flow from hotplate to the boiling soup:
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