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Heat exchangers are typically classified according to flow arrangement and type of construction. The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions in a concentric tube (or double-pipe) construction.
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18.5.3 Efficiency of a Counterflow Heat Exchanger. 18.6...
- 18.4 Modeling Complex Physical
18. 4 Some Considerations in Modeling Complex Physical...
- 16.Unified
18. 5. 1 Simplified Counterflow Heat Exchanger (With Uniform...
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Some examples of common design parameters to be taken into account are: • Flow rate of both fluid streams • Inlet and outlet temperatures of both streams • Operating pressure of both streams • Allowable pressure drop of both streams • Fouling resistance for both streams • Physical properties of both streams • Type and ...
Algebraic expressions for the correction factor Fhave been developed for vari- ous shell-and-tube and cross-flow heat exchanger configurations [1–3], and the results may be represented graphically. Selected results are shown in Figures 11S.1 through 11S.4 for common heat exchanger configurations.
A heat exchanger is a component that allows the transfer of heat from one fluid (liquid or gas) to another fluid. Reasons for heat transfer include the following:
In these examples, heat is transferred by radiation (Figure \(\PageIndex{10}\)). That is, the hot body emits electromagnetic waves that are absorbed by the skin. No medium is required for electromagnetic waves to propagate.
Q = mcΔT, where Q is the symbol for heat transfer (“quantity of heat”), m is the mass of the substance, and ΔT is the change in temperature. The symbol c stands for the specific heat (also called “ specific heat capacity ”) and depends on the material and phase.
The discussion of heat transfer has been structured around some everyday examples such as the cooling of a hot mug of coffee and the warming of a cold can of pop. Finally, we have explored a thought experiment in which a metal can containing hot water is placed within a Styrofoam cup containing cold water.
