Chickens with an average mass of 2.2 kg and average specific heat of 3.54 kJ/kg·°C are to be cooled by chilled water that enters a continuous-flow-type immersion chiller at 0.5°C. Chickens are dropped into the chiller at a uniform temperature of 15°C at a rate of 500 chickens per hour and are cooled to an average temperature of 3°C before they are taken out. The chiller gains heat from the surroundings at a rate of 200 kJ/h. Determine (a) the rate of heat removal from the chickens, in kW, and (b) the mass flow rate of water, in kg/s, if the temperature rise of water is not to exceed 2°C.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Chickens with an average mass of 2.2 kg and
average specific heat of 3.54 kJ/kg·°C are to be cooled by
chilled water that enters a continuous-flow-type immersion
chiller at 0.5°C. Chickens are dropped into the chiller
at a uniform temperature of 15°C at a rate of 500 chickens
per hour and are cooled to an average temperature of 3°C
before they are taken out. The chiller gains heat from the
surroundings at a rate of 200 kJ/h. Determine (a) the rate
of heat removal from the chickens, in kW, and (b) the mass
flow rate of water, in kg/s, if the temperature rise of water is
not to exceed 2°C.
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