Αποτελέσματα Αναζήτησης
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.
4.0 – HEAT EXCHANGERS CALCULATIONS: The main basic Heat Exchanger equation is: Q = U x A x ΔT m = The log mean temperature difference ΔTm is: ΔT m = (T 1 – t 2) – (T 2 – t 1) = °F T 1 = Inlet tube side fluid temperature; t 2 = Outlet shell side fluid temperature; T 2 = Outlet tube side fluid temperature; t 1 = Inlet shell side fluid ...
Heat Transfer Equation Sheet. eat Transfer Equation S. Conduction: qx = - kA. ©2015. J. M. Hill . Heat Exchangers: ΔTLM = {(THo – TCo) - (THi – TCi)}/{ln[(THo – TCo)/ (THi – TCi)]} Parallel flow. Convection: q = hA(Ts - T∞) q = UA ΔTLM. ΔTLM = {(THo – TCi) - (THi – TCo)}/{ln[(THo – TCi)/ (THi – TCo)]} Counter flow.
Basic Thermodynamic Formulas (Exam Equation Sheet) Control Mass (no mass flow across system boundaries) Conservation of mass: 𝑚= 𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐. Conservation of energy (1st Law): 𝑄−𝑊= ∆𝐸 = ∆𝑈+ ∆𝐾𝐸+ ∆𝑃𝐸 = 𝑚 ∆𝑢+ 𝑣2 2−𝑣 1 2 2 + 𝑔(𝑧2−𝑧1)
The general function of a heat exchanger is to transfer heat from one fluid to another. The basic component of a heat exchanger can be viewed as a tube with one fluid running through it and another fluid flowing by on the outside.
Here’s a hot nomenclature. Power (heat transfer per unit time), measured in. ′′ Heat flux (power per unit area), measured in −2.
Heat transfer theory. Heat can be transferred by three methods. Radiation – Energy is transferred by electromag netic radiation. One example is the heating of the earth by the sun. Conduction – Energy is transferred between solids or stationary fluids by the movement of atoms or molecules.
