BS 5141-2:1977

Foreword
Cooperating organizations
Specification
1 Scope
2 References
3 Object of the test
4 Definitions
5 Nomenclature
6 Instrumentation
7 Air flow leakage test
8 Test apparatus
9 Requirements for rating tests
10 Tests required for establishing a rating
11 General test procedures
12 Test results
13 Basic calculations
14 Heat transfer calculations
15 Pressure drop calculations
16 Accuracy and extrapolation
Appendices
A Procedure for heat transfer calculations
B Examples of heat transfer test data calculations
C Examples of heating duty calculations
D Typical values of thermal conductivity
Figures
1 Typical arrangement of passes
2 Typical arrangement of rows
3 Types of fins
4 Thermometer pockets
5 Multijunction differential thermocouple
6 Air sampling tubes
7 Inverted tube pattern manometer and piezometer ring
8 Apparatus for air flow leakage test
9 Typical test duct arrangements
10 Air flow mixers
11 Open-circuit water system
12 Closed-circuit water system
13 Steam system
14 Efficiency of fins of constant thickness
15 Efficiency of fins of constant area for heat flow
    and of spiral fins
16 Example of graph Ra versus (Ra + Rm) prepared from
    test data
17 Example of graph Rm versus fa
18 Example of water-film heat transfer coefficient for
    tube with turbulators for inlet water temperatures
    between 40 deg C and 120 deg C
19 Graph of factor F for corrected logarithmic mean
    temperature for cross-flow single-pass coils
20 Example of graph of Ra as a function of velocity vr
21 Correcting factor Kw for hydraulic pressure drop

Rating test for duct-mounted air heating coils with hot water or dry saturated steam as the heating medium.

This Part of BS 5141 gives a method of testing for rating of duct-mounted air heating coils with hot water or dry saturated steam as the heating medium within the range of variables given in Table 1.