What is BS EN 14705 - Thermal performances of wet cooling towers about?
BS EN 14705 is a European Standard that discusses heat exchangers. The purpose of BS EN 14705 is to evaluate the thermal performances of wet cooling towers to demonstrate whether they are safe, reliable and effective at the point of use.
BS EN 14705 specifies requirements, test methods, and acceptance tests for thermal performance pumping head verification of wet cooling towers and plume abatement for wet/dry cooling towers.
BS EN 14705 is applicable to natural draught wet cooling towers fan-assisted natural draught cooling towers, wet/dry cooling towers, and "Mechanical draught cooling towers", except series ones.
BS EN 14705 specifies the test methods, the apparatus required, the limitation of errors, and the method for results examination.
The acceptance testing covers the verification of the thermal performance data and pumping head of the cooling tower as specified in the contract between the supplier and the purchaser. If these tests are required then this should be recognized at the time of the contract, as additional fittings, and preparations for the test may be required.
Deviations from the rules laid down below as well as additions need special agreement between purchaser and supplier and should be documented.
Note 1: BS EN 14705 does not apply to mechanical draught series wet cooling towers which are dealt with in EN 13741.
Note 2: Terms like "design", "values", "guarantee" and "acceptance" used in this standard should be understood in a technical but not in a legal or commercial sense.
Who is BS EN 14705 - Thermal performances of wet cooling towers for?
BS EN 14705 on thermal performances of wet cooling towers is useful for:
- Boiler and heat-exchanger manufacturers
- HVAC appliance manufacturers
- Companies dealing with refrigeration technology
- Product designers
- Mechanical engineers
- Quality control personnel
Why should you use BS EN 14705 - Thermal performances of wet cooling towers?
Wet cooling towers are structures that cool water that has been heated by industrial or power-producing processes, that are a necessary component of the heat exchangers.
The thermal performance of a cooling tower is its ability to produce guaranteed recooled water temperatures under specified operating conditions and inlet air conditions. This can be achieved by a direct comparison between the test results and the manufacturer's performance curves or by reference of the test results to the design conditions.
BS EN 14705 provides best industry guidance on performance tests and calculation methods necessary for the evaluation of thermal performances of wet cooling towers. The performance tests also take into account the following performances:
- Pumping head- flow rates and pressure loss
- Emission performances (drift losses)
- Plume characteristics at the outlet (only for wet/dry cooling towers)
Thus, if you are a manufacturer, BS EN 14705 can help demonstrate the thermal efficiency of the wet cooling towers and determine whether they are fit for purpose.
