The shortest way to do many things isEuropean standard Euroven approval VS Chinese standard demand
In the early 90s, the European and American air conditioner companies were established plant gradually in China and then brought technology of air purification into China. Air conditioner professionals are getting more and more familiar with European En1886 standards. In recent years, with the improvement of the air conditioner energy saving and environmental requirements, more and more owners and designing institute tends to inspect air handling units with European EN1886 standard. As industry and cleaning project, some performance of the units should follow the standard’s specific grades. it would been asked for performance of box reaching this standard’s level more definite. Where is the specialty of the European EN1886 standard? What’s the difference between European EN1886 standard and national standard GB14294? The following comparison will make you understand the European EN1886 standard.
EN1886-2007
Unit degree 1.Relative
deformation=max(××’’/PQ, ×’
of ×’’/RS)
mechanical2.Intensity scale: be divided into
three grades like D1、D2 and D3
according to the relative
deformation, and the permanent deformation is less than 2mm/m after the pressure is relieved ; 3.Testing pressure：
GB 14294-2008
1.Relative deformation=
maximum deformation/ longest edge;
2. Deformation less than 4 mm/m,
or disqualification;3.Testing pressure:
4.Machine’s air volume more than
30000m3/h, tested by using ±1000Pa, no requirement of permanent deformation volume.
The shortest way to do many things isUnit degree
of mechanical
Modular machine±1000Pa, to test 5.Same treatment to positive deformation, ±2500Pa, to test the pressure and negative pressurepermanent deformation. Real machine can test deformation and permanent deformation when achieving
maximum pressure by using working pressure and machine units.
4. positive pressure and negative pressure section
To test positive pressure and
negative pressure section of the real machine by using positive pressure and negative pressure separately, which should follow the requirements of the machine unit.
EN1886-2007 has more detailed test demands compared with existing national standard GB14294-2008
The shortest way to do many things is1.Grading schedule1.No grading: air leakage less 2.Test must be after the strength than 2% (Air purifying unit
1%);test is over
3.Calculation method: air leakage 2.No regulation;
percent=air leakage volume/ 3.Air leakage percent= air leakage machine unit’s superficial areavolume/rated air leakage volume More nominal air
volume, and less air leakage
-400Pa +700Papercent in a same unit maximum maximumLevel leakage eakageThe results have no straight
connection to nominal air Percent percent
L/(m2*s) L/(m2*s)volume. Testing unit’s air
leakage percent must be after
L1 0.15 0.22the strength is tested, which L2 0.44 0.63has not been required in current
national standard. The L3 1.32 1.9
calculation of national standard
The calculation results with air volume air leakage percent: air leakage size has no direct relationpercent=air leakage volume/
rated air volume. More nominal air volume, and less air leakage percent in a same unit. As a result, EN1886’s evaluation of air leakage percent will present the condition whether the operation of the unit is economic.
EN1886-2007
GB 14294-2008
Unit leakage
The unit thermal performanc
e
1.Unit’s heat transmission1.Unit’s heat transmission2.To measure by heat 2.Panel’s heat insulation more than
transmission parameter. To 0.74 k/W (the corresponding be graded into five grades by heat transmission parameter is heat transmission 1.35W/(m K))
3.Performance of unit’s parameter : T1, T2, T3, T4,
condensation-proofT5
3.Anti-frost of unitNo specific grade regulation.
Regulation of no 4.To measure by heat
condensation on the transmission parameter. To
machine’s surface within 4 be graded into five grades by
heat transmission hours’ operation. A bit
obscure.parameter : TB1, TB2, TB3,
The shortest way to do many things is5.6.
TB4, TB54. Test of the unit’s heat Test of heat transmission transmissionparameterNo regulation. Only Can be calculated by testing regulation of the heat
insulation of the unit’s panel. the whole unit’s heat
And the unit’s panel is usually transmission
Test of heat bridging the most part of heat To test some testing points insulation of the unit of the units, and the structure.
minimum is the heat bridging 5. Test of the performance of the parameter of the units.(the unit’s condensation-proofmore the heat bridging is , No regulation of heat bridging the higher the grade is.)parameter. Only test condition of
condensation. Vague and hard
Heat transfer Coefficient evaluation. And average thermal coefficient of thermalperformance is barelyclassification bridge
HTC
Level
W/(m2*k)
T1 U≦0.5 TB1 0.75≦KB﹤1.0T2 0.5﹤U≦1.0 TB2 0.60≦KB﹤0.75T3 1.0﹤U≦1.4 TB3 0.45≦KB﹤0.60T4 1.4﹤U≦2.0 TB4 0.30≦KB﹤0.45T5 no request TB5 no request
Level TBC
7.8.
Unit
In comparison, EN1886 has specific test methods and evaluation of the unit’s thermal performance and can reflect the difference of strength and energy saving results of unit’s heat bridging and thermal insulation performance.Requirements:Only regulation of specific air
To give the centre volume. The corresponding noise
frequency’s corresponding silencing of static pressure is no more than quantity of the eight times frequency the limitationspectrum.
Requirements:Requirements:
Regulation of using restriction of the no specific requirement of fire-unit’s inflammable material;retardant and non-flammable Specific regulation of fireproof performance of the unit material’s requirement of the unit’s all exposed parts or the unit.components and easy to evaluate.
Sound
insulation
Fireproof
performance
The shortest way to do many things isThe comparison of two testing method and evaluation standard of the corresponding AHU’s air leakage percent and thermal performance from EN1886 standard and national standard shows, that En1886 has strict regulation of selection and manufacture of experimental specimen. The results can reflect superiority and energy saving of the unit’s actual application better, ensure the accuracy , science and impartiality better and protect the tenders’ and companies’ interest better.
欧洲标准Eurovent认证VS国标要求翻译(可编辑修改版).
