Cold water (cp = 4180 J/kg·K) enters the tubes of a heat exchanger with 2-shell passes and 20-tube passes at 20°C at a rate of 3 kg/s, while hot oil (cp = 2200 J/kg·K) enters the shell at 130°C at the same mass flow rate and leaves at 60°C. If the overall heat transfer coefficient based on the outer surface of the tube is 220 W/m2·K, determine (a) the rate of heat transfer and (b) the heat transfer surface area on the outer side of the tube.
Latent heat and phase change
A physical process in which a conversion among the basic states or phases of matter, i.e., solid, liquid, and gas takes place under the effect of a certain temperature and pressure is referred to as a phase change. Generally, the phase change of a substance occurs when heat transfer takes place between the substance and its surroundings. Based on the direction in which heat transfer takes place, different types of phase changes can occur.
Triple Point of Water
The branch of physics in which observer deals with temperature related properties is called thermodynamics.
Boiling Point of Water
Everyday examples of boiling is, boiling milk, heating water. One would have observed that when we heat water it goes through various stages and at one point bubbles show in water, and water keeps splashing with bubbles bursting, we in layman terms say that water is boiling.
Freezing Point of Water
In general, the freezing point of water is 0° Celsius, or 32° Fahrenheit. This is the temperature at which water will ordinarily change from its liquid state to its solid state (ice). However, there are certain conditions that can affect the freezing point of water. For example, a liquid may be supercooled or contain impurities so that it does not freeze at the ordinary freezing point.
Cold water (cp = 4180 J/kg·K) enters the tubes of
a heat exchanger with 2-shell passes and 20-tube passes at
20°C at a rate of 3 kg/s, while hot oil (cp = 2200 J/kg·K)
enters the shell at 130°C at the same mass flow rate and
leaves at 60°C. If the overall
on the outer surface of the tube is 220 W/m2·K, determine
(a) the rate of heat transfer and (b) the heat transfer surface
area on the outer side of the tube.
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