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.
Geankoplis 4th ed. 4.5‐4. Water flowing at a rate of 13.85 kg/s is to be heated from 54.5 to 87.8oC in a double‐pipe heat exchanger by 54,430 kg/h of hot gas flowing counterflow and entering at 427oC ( 1.005 / ).
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 ©2015 J. M. Hill = Conduction: q x - kA 𝑑𝑑𝑑𝑑 𝑑𝑑𝑑𝑑 Heat Exchangers: ΔT LM = {(T Ho – T Co) - (T Hi – T Ci)}/{ln[(T Ho – T Co)/ (T Hi – T Ci)]} Parallel flow . Convection: q = UAq = hA(T s - T∞) ΔT LM ΔT LM = {(T Ho – T Ci) - (T Hi – T Co)}/{ln[(T Ho – T Ci)/ (T Hi – T
Heat Transfer and Work Relationships . Conduction: 𝑄̇= −𝑘𝑘. 𝑑𝑇 𝑑𝑑. Convection: 𝑄̇= ℎ𝑘(𝑇. 𝑠. −𝑇. ∞) Radiation: 𝑄̇= 𝜀𝜎𝑘(𝑇. 𝑠 4. −𝑇. 𝑠𝑠𝑠 4) Heat transfer for an internally reversible process: 𝑄. 𝑖𝑖𝑑.𝑠𝑒𝑣 = ∫𝑇 𝑑𝑆. Boundary work: 𝑊. 𝑏 ...
Heat Exchangers DOE-HDBK-1018/1-93 TYPES OF HEAT EXCHANGERS. Plate. Figure 1 Tube and Shell Heat Exchanger. A plate type heat exchanger, as illustrated in Figure 2, consists of plates instead of tubes to separate the hot and cold fluids. The hot and cold fluids alternate between each of the plates. Baffles direct the flow of fluid between plates.
conection factor for log mean temperature difference for more complex heat exchangers (shell and tube an-angements with several tube or shell passes or cross-flow exchangers with mixed and ummxed flow),
