BS 5141-1:1975
Current
The latest, up-to-date edition.
Specification for air heating and cooling coils Method of testing for rating of cooling coils
Hardcopy , PDF
English
30-06-1975
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Foreword
0 Introduction
1 Scope
2 References
3 Definitions
4 Nomenclature
5 Instrumentation
6 Air flow leakage test
7 Test apparatus
8 General test instructions
9 Calculations
10 Requirements for rating tests
11 Test required for establishing a rating
12 Heat transfer calculations
13 Pressure drop calculations
14 Accuracy and calculations
Appendices
A Examples of heat transfer test data calculations
B Examples of cooling duty calculations
C Calculation of sensible cooling load from inlet
conditions
D Typical values of thermal conductivity
Figures
1 Typical arrangements of passes
2 Typical arrangements of rows
3 Types of fins
4 Thermometer pockets
5 Multi-junction differential thermocouple
6 Air sampling tubes
7 Apparatus for air flow leakage test (showing
alternative air supply systems)
8 Water supply system
9 Alternative water supply system
10 Inverted U-tube manometer and piezometer ring
11 Typical test duct arrangements
12 Air flow mixers
13 Condensate drain
14 Efficiency of fins of constant thickness
15 Efficiency of fins of constant area for heat flow
and of spiral fins
16 Graph of Ra versus (Ra + Rm)
17 Graph of Rm versus fa
18 Water film heat transfer coefficient for tube with
turbulators
19 Graph of F, factor for corrected logarithmic mean
temperature
20 Graph of Rad as a function of velocity (vr)
21 Surface temperature chart
22 Surface temperature chart; determination of C scale
23 Use of surface temperature chart
24 Graph for determination of Z in relation to coil
surface temperature
25 Graph of Raw as a function of velocity (vr)
26 Hydraulic pressure drop correction factor
27 Graph of Aoc versus Raw
Duct-mounted cooling coil rating test with chilled water as the cooling medium within specified ranges of variables for inlet air and water temperatures and for water flow and air velocity.
| Committee |
RHE/6
|
| DevelopmentNote |
Supersedes 72/38381 DC. (07/2005) Reviewed and confirmed by BSI, December 2012. (11/2012)
|
| DocumentType |
Standard
|
| Pages |
58
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This standard gives a method of testing for rating of duct-mounted air cooling coils, with chilled water as the cooling medium, within the following range of variables:
- Inlet air temperature: below 40 °C
- Inlet water temperature: 2 °C to 20 °C
- Inlet air wet bulb depression: greater than 4 °C
- Sensible heat ratio (Qs/QT): less than 0.8 (for dehumidifying coils)
- Water flow: Reynolds number above 3 100
- Air velocity at coil face: 1 m/s to 4 m/s
| BS 5720:1979 | Code of practice for mechanical ventilation and air conditioning in buildings |
| BS 6583:1985 | Methods for volumetric testing for rating of fan sections in central station air handling units (including guidance on rating) |
| BS 3208(1960) : LATEST | METHODS OF TEST AND RATING FOR HOT WATER AIR HEATER BATTERIES |
| BS 1042(1965) : LATEST | |
| BS 350:2004 | Conversion factors for units |
| BS 4194:1967 | Recommendations on the design requirements and testing of controlled-atmosphere laboratories |
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