NEN EN 247 : 1997

Foreword
1 Scope
2 Definitions
    2.1 Parallel-flow arrangement
    2.2 Counterflow arrangement
    2.3 Pure crossflow
    2.4 Antimethodic overall-flow arrangement
    2.5 Methodic overall-flow arrangement
    2.6 Two-phase fluid
    2.7 Single-phase fluid
    2.8 Fluidized bed
    2.9 Method of heat transfer
    2.10 Number of passages (passes)
    2.11 Tube sheet
    2.12 General arrangement of heat transfer
    2.13 Steady or permanent thermal conditions
    2.14 Cyclic thermal conditions
3 Terminology - Main criteria
    3.1 Physical criteria
          3.1.1 General arrangement of heat transfer
          3.1.2 Method of heat transfer
          3.1.3 Arrangement of fluid flow
          3.1.4 Thermal conditions of the heat transfer
                  surface
          3.1.5 Number and type of fluids
    3.2 Design criteria
          3.2.1 Type of design
          3.2.2 Heat transfer
          3.2.3 Methods to facilitate expansion
          3.2.4 Material of heat transfer wall
          3.2.5 Constructive solutions related to cleaning
          3.2.6 Cleaning possibilities
4 Detailed terminology
    4.1 General arrangement of heat transfer
          4.1.1 With direct transfer
          4.1.2 With accumulation
          4.1.3 In fluidized bed
          4.1.4 With cooling
          4.1.5 With intermediate medium (with natural
                  or forced circulation)
    4.2 Method of heat transfer
          4.2.1 Single-phase media in all circuits
          4.2.2 Single-phase media versus two-phase media
                  in related circuits
          4.2.3 Two-phase media in all circuits
    4.3 Diagram of fluid flow
          4.3.1 Single pass
          4.3.2 Multiple passes
    4.4 Thermal conditions of heat transfer surface
          4.4.1 Steady
          4.4.2 Cyclic
    4.5 Number of fluids (media)
          4.5.1 Two fluids (media)
          4.5.2 Three fluids (media)
          4.5.3 N fluids (media)
    4.6 Design type
          4.6.1 Shell and tube heat exchangers
          4.6.2 Plate heat exchangers
          4.6.3 Heat exchangers of stacked blocks or with
                  crossing channels
          4.6.4 Matrix heat exchangers
    4.7 Heat transfer surfaces and walls
          4.7.1 Smooth
          4.7.2 Coated
          4.7.3 Fabricated
          4.7.4 With built-on elements
          4.7.5 With safety wall (double wall)
    4.8 Expansion possibilities
          4.8.1 Rigid
          4.8.2 Elastic
          4.8.3 Free
          4.8.4 With sealing device
    4.9 Materials of heat transfer wall
          4.9.1 Metallic
          4.9.2 Non-metallic
          4.9.3 Special
          4.9.4 Composite
    4.10 Constructive solutions related to cleaning
          4.10.1 Non-dismountable
          4.10.2 Dismountable
    4.11 Cleaning possibilities
          4.11.1 Mechanical means
          4.11.2 Acoustic means
          4.11.3 Chemical means
Annex A (informative) main functions of heat exchangers in
various technological fields related to this European
Standard
Annex B (informative) Examples for illustration of the
terminology in clause 4
Figures
1 Parallel flow arrangement
2 Counter flow arrangement
3 Pure cross flow
4 Antimethodic overall flow arrangement
5 Methodic overall flow arrangement
B.1 Coil heat exchangers
B.2 Straight, single-type
B.3 U-bent, dismountable
B.4 Wound or bent
B.5 Concentric
B.6 With U-tubes
B.7 With fixed tube plates
B.8 With floating head
B.9 With sliding head and O-ring seals
B.10 With sliding head and caulked seals
B.11 Heat exchangers of bayonet type
B.12 Helical
B.13 Spiral-shaped
B.14 Coil with straight tubes and bends
B.15 Coil with accumulator bends
B.16 Coil with tube sheets and accumulator boxes with
       plugs
B.17 Coil with tube sheets and accumulator boxes with
       covers
B.18 Single plates
B.19 Several non-dismountable plates
B.20 Several corrugated, non-dismountable plates
B.21 Dismountable shell-type-lamella heat exchanger
B.22 Plate exchanger with seals
B.23 Spiral shaped
B.24 Heat exchanger of stacked blocks or with crossing
       channels