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E-type shells in shell-and-tube heat exchangers:
Ebert and Panchal equation, for crude oil fouling,
Eckert number,
Eddy viscosity:
Eddy diffusivity, of heat,
Edge, D,
Edwards, D K
EEC code for thermal design of heat exchangers,
Effective diffusivity,
Effective thermal conductivity of fixed beds,
Effective tube length in shell-and-tube heat exchangers,
Effectiveness of a heat exchanger:
Efficiency of fins,
Eicosane:
Eicosene:
Ejectors, in flash distillation plant,
EJMA (Expansion Joint Manufacturers Association), standards for expansion bellows
Elastic properties of solids:
El-Dessouky, H,
Electrical enhancement processes, in heat transfer augmentation,
Electric fields, effect on properties of rheologically complex materials,
Electric fields, in augmentation of condensation,
Electrical process heater, specification of,
Electrokinetics, for heat transfer augmentation in microfluidic systems,
Electromagnetic theory of radiation,
Electrostatic fields in augmentation of heat transfer,
Elements:
Elhadidy relation between heat and momentum transfer,
Embedding methods for radiative heat transfer in nonisothermal gases,
Embittlement, of stainless steels,
Emission of thermal radiation, in solids,
Emissivity:
Emitting media, interaction phenomena with,
Emulsions, viscosity of,
EN13445 (European Pressure Vessel Codes), design of heat exchangers to,
Enclosures:
Energy equation:
Energy recovery, maximum, in heat exchanger network design,
Enhanced surfaces, fouling in,
Enhancement devices:
Enlargements in pipes:
Enthalpy:
Entrainment in annular gas-liquid flow
Entrance effects in heat and mass transfer:
Entrance lengths, hydrodynamic in pipe flow,
Entrance losses for tube inlet in shell-and-tube heat exchanger,
Entry losses in plate heat exchangers,
Entropy generation and minimisation
Environmental impact, of fouling,
Eotvos number:
Epstein, N,
Epstein matrix, for fouling,
Equalizing rings, for expansion bellows,
Equilibrium interphase:
Equilibrium vapor nucleus,
Equivalent sand roughness,
Ergun equation, for pressure drop in fixed beds
ESDU correlations:
Esters:
Ethane:
Ethanol:
Ethers:
Ethyl acetate:
Ethylacetylene:
Ethylacrylate:
Ethylamine:
Ethylbenzene:
Ethyl benzoate:
Ethyl butanoate:
Ethylcyclohexane:
Ethylcyclopentane:
Ethyl formate:
Ethylene:
Ethylene diamine:
Ethylene glycol:
Ethylene oxide:
Ethylmercaptan:
1-Ethylnaphthalene:
2-Ethylnaphthalene:
Ethyl proprionate:
Ethyl propylether:
Ettouney, H,
Euler number:
Eutectic mixtures, condensation of forming immiscible liquids,
Evaporation:
Evaporative crystallisers,
Evaporators:
Exergy, definition of,
Exergy analysis,
Exit losses for tubes in shell-and-tube exchanger,
Expansion bellows, for shell-and-tube heat exchangers:
EJMA (Expansion Joint Manufacturers Association), standards for
Expansion joints, mechanical design of:
Expansion of tubes into tube sheets:
Expansion turbine, lost work in,
Explosively clad plate,
Explosive welding of tubes into tube sheets
Explosive expansion joints,
Extended surfaces (see also Fins)
Externally induced convection, in kettle reboilers,
Extinction coefficient,
Extinction efficiency,
Eyring fluid (non-Newtonian),
Index
HEDH
A
B
C
D
E
E-type shells in shell-and-tube heat exchangers:
Ebert and Panchal equation, for crude oil fouling,
Eckert number,
Eddy viscosity:
Eddy diffusivity, of heat,
Edge, D,
Edwards, D K
EEC code for thermal design of heat exchangers,
Effective diffusivity,
Effective thermal conductivity of fixed beds,
Effective tube length in shell-and-tube heat exchangers,
Effectiveness of a heat exchanger:
Efficiency of fins,
Eicosane:
Eicosene:
Ejectors, in flash distillation plant,
EJMA (Expansion Joint Manufacturers Association), standards for expansion bellows
Elastic properties of solids:
El-Dessouky, H,
Electrical enhancement processes, in heat transfer augmentation,
Electric fields, effect on properties of rheologically complex materials,
Electric fields, in augmentation of condensation,
Electrical process heater, specification of,
Electrokinetics, for heat transfer augmentation in microfluidic systems,
Electromagnetic theory of radiation,
Electrostatic fields in augmentation of heat transfer,
Elements:
Elhadidy relation between heat and momentum transfer,
Embedding methods for radiative heat transfer in nonisothermal gases,
Embittlement, of stainless steels,
Emission of thermal radiation, in solids,
Emissivity:
Emitting media, interaction phenomena with,
Emulsions, viscosity of,
EN13445 (European Pressure Vessel Codes), design of heat exchangers to,
Enclosures:
Energy equation:
Energy recovery, maximum, in heat exchanger network design,
Enhanced surfaces, fouling in,
Enhancement devices:
Enlargements in pipes:
Enthalpy:
Entrainment in annular gas-liquid flow
Entrance effects in heat and mass transfer:
Entrance lengths, hydrodynamic in pipe flow,
Entrance losses for tube inlet in shell-and-tube heat exchanger,
Entry losses in plate heat exchangers,
Entropy generation and minimisation
Environmental impact, of fouling,
Eotvos number:
Epstein, N,
Epstein matrix, for fouling,
Equalizing rings, for expansion bellows,
Equilibrium interphase:
Equilibrium vapor nucleus,
Equivalent sand roughness,
Ergun equation, for pressure drop in fixed beds
ESDU correlations:
Esters:
Ethane:
Ethanol:
Ethers:
Ethyl acetate:
Ethylacetylene:
Ethylacrylate:
Ethylamine:
Ethylbenzene:
Ethyl benzoate:
Ethyl butanoate:
Ethylcyclohexane:
Ethylcyclopentane:
Ethyl formate:
Ethylene:
Ethylene diamine:
Ethylene glycol:
Ethylene oxide:
Ethylmercaptan:
1-Ethylnaphthalene:
2-Ethylnaphthalene:
Ethyl proprionate:
Ethyl propylether:
Ettouney, H,
Euler number:
Eutectic mixtures, condensation of forming immiscible liquids,
Evaporation:
Evaporative crystallisers,
Evaporators:
Exergy, definition of,
Exergy analysis,
Exit losses for tubes in shell-and-tube exchanger,
Expansion bellows, for shell-and-tube heat exchangers:
EJMA (Expansion Joint Manufacturers Association), standards for
Expansion joints, mechanical design of:
Expansion of tubes into tube sheets:
Expansion turbine, lost work in,
Explosively clad plate,
Explosive welding of tubes into tube sheets
Explosive expansion joints,
Extended surfaces (see also Fins)
Externally induced convection, in kettle reboilers,
Extinction coefficient,
Extinction efficiency,
Eyring fluid (non-Newtonian),
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
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EGM at the system level
DOI 10.1615/hedhme.a.000129
1.8.4 Entropy Generation Minimization at the System Level
Adrian Bejan
A. Allocation of finite heat exchanger inventory in a power plant
In this section we illustrate how the EGM method can be used to determine the optimal way in which a finite heat exchanger inventory (e.g. finite area) can be distributed among the heat exchangers of a power plant. In power plants, the optimization can be performed by maximizing the power output (the course chosen here), or by minimizing the total entropy generation rate Bejan (1996).
The simplest illustration of this thermodynamic optimization principle is made possibly by the power plant model (ref. Bejan (1982), p. 146) shown in Figure 1. The heat input \(\dot {Q}_{H}\) is fixed,i.e. the optimization is carried out on a per unit of fuel basis. The power plant operates irreversibly between the heat source temperature TH and the ambient, T L. The model is based on the assumption that the power plant irreversibility is due to the two heat transfer rates. The simplest heat exchanger models are
\[\label{eq1} \dot {Q}_{H} = U_{H}A_{H}(T_{H} - T_{HC})\tag{1}\]
\[\label{eq2} \dot {Q}_{L} = U_{L}A_{L}(T_{LC} - T_{L})\tag{2}\]
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