GB/T 21087-2020 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 21087-2020 | English | 635 |
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Energy recovery ventilators for outdoor air handling
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| GB/T 21087-2007 | English | 150 |
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Air-to-air energy recovery equipment
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GB/T 21087-2020: Energy recovery ventilators for outdoor air handling---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT21087-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.30
P 46
Replacing GB/T 21087-2007
Energy recovery ventilators for outdoor air handling
Issued on. SEPTEMBER 29, 2020
Implemented on. AUGUST 01, 2021
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Classification and marking... 11
5 Structure and materials... 13
6 Requirements... 14
7 Test method... 17
8 Inspection rules... 23
9 Marking, packaging, transportation, storage... 25
Appendix A (Normative) Test methods for air volume, static pressure loss, available
pressure, input power... 28
Appendix B (Normative) Field test method of heat recovery performance... 37
Appendix C (Normative) Test method of internal exhaust air leakage ratio... 38
Appendix D (Normative) Test method of external air leakage ratio... 41
Appendix E (Normative) Test method for net outdoor air volume and net outdoor
airflow ratio in supply air... 44
Appendix F (Normative) Test methods for exchange effectiveness, energy efficiency
coefficient, energy recovery ratio... 51
Appendix G (Normative) Performance test method of reciprocating heat recovery unit
... 57
Appendix H (Normative) Test method of condensation and condensed water... 64
Appendix I (Normative) Noise test method... 65
Appendix J (Normative) Alternating performance test method... 70
1 Scope
This standard specifies the classification and marking, structure and materials,
requirements, test methods, inspection rules, marking, packaging, transportation and
storage of energy recovery ventilators for outdoor air handling.
This standard applies to fresh exhaust ventilation units, that recover exhaust energy in
heating, ventilation, air conditioning and purification systems and pre-treat outdoor air
with cooling, heating, humidity, filtration.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 755-2019 Rotating electrical machines - Rating and performance
GB/T 1236-2017 Industrial fan - Performance testing using standardized airways
GB/T 2423.3 Environmental testing - Part 2.Testing method - Test Cab. Damp heat,
steady state
GB/T 3785.1-2010 Electroacoustics - Sound level meters - Part 1.Specifications
GB 4706.1-2005 Household and similar electrical appliances - Safety - Part 1.
General requirements
GB 8624 Classification for burning behavior of building materials and products
GB/T 9068 Determination of sound power levels for noise emitted by heating,
ventilating and air conditioning equipments - Engineering method
GB/T 14295 Air filter
GB/T 14296 Air cooling and air heating coils
3 Terms and definitions
The terms and definitions as defined in GB/T 16803, as well as the following terms and
definitions, apply to this document.
3.1
Energy recovery ventilators for outdoor air handling; ERV
Equipment that uses a sensible heat or total energy recovery component as the core
and drives the air flow through a fan to achieve outdoor air to exhaust air energy
recovery and outdoor air filtration.
3.2
Energy recovery components; ERC
Heat exchange components that achieve sensible heat or total heat energy exchange
between air and air.
3.3
Total heat exchange
Energy exchange in which sensible heat and latent heat conversion occur
simultaneously.
3.4
Sensible heat exchange
Energy exchange in which only sensible heat conversion occurs.
3.5
Standard air
Air with an atmospheric pressure of 101.3 kPa, a dry bulb temperature of 20 °C, a
wet bulb temperature of 15.8 °C, a density of 1.2 kg/m3.
3.6
Outdoor air
Outdoor air entering from the outdoor air inlet.
4 Classification and marking
4.1 Classification
4.1.1 The code for the energy recovery ventilators for outdoor air handling is "ERV";
the code for the energy recovery components for outdoor air handling is "ERC".
4.1.2 The classification and corresponding codes of ERV and ERC are shown in Table
1.
4.2 Marking
4.2.1 ERV marking
Example.
An energy recovery ventilators for outdoor air handling with a rated air supply of 300 m3/h,
total heat, hanging type, rotary type, non-flame retardant and ordinary antibacterial, is marked
as.
4.2.2 ERC marking
Example.
5 Structure and materials
5.1 ERV and ERC shall be manufactured according to drawings and technical
documents.
5.2 The interior of ERV and ERC shall be clean and free of debris.
5.7 The fireproof characteristics of flame-retardant ERC shall meet the relevant
requirements of GB 50016; it shall be graded according to the relevant requirements of
GB 8624.
5.8 The line connection of ERV and ERC shall be neat and firm; it shall have reliable
grounding. The wire penetration and plug shall use insulating sleeves or other protective
measures; the exposed wires outside the shell should be protected by metal hoses.
5.9 Electrical control components shall be sensitive and reliable.
5.10 For ERV or ERC with inspection doors, the inspection doors shall be tight and
flexible; the inspection passage doors accessible to personnel shall be open both inside
and outside.
5.11 ERV shall ensure that condensate can be removed smoothly during heat exchange.
5.12 The surface air cooler and heater configured for ERV shall meet the relevant
requirements of GB/T 14296.
5.14 Antibacterial ERC shall meet the relevant requirements of GB 21551.2.
5.15 ERV should be equipped with energy-saving operation controller. Under the
condition of meeting the requirements of outdoor air exhaust air distribution volume,
the ERV energy consumption can be reduced, by adjusting the fan speed, bypassing the
outdoor air exhaust, etc.
5.16 Independently installed ERV outdoor air inlet and exhaust outlet shall be equipped
with insulated and sealed air valves.
6 Requirements
6.1 Appearance
The outer surface of the unit shall be smooth and the color shall be consistent, without
obvious scratches, rust spots, indentations, flow marks, bubbles, peeling. Various logos
and nameplates affixed to the outer surface shall be firm; the position shall be obvious.
6.5 Static pressure loss
The measured value of the static pressure loss on the outdoor air side and exhaust side
of the ERC shall not be greater than 105% of the rated value.
6.6 Input power
For units with a rated input power not exceeding 30 W, the measured value of the input
power shall not be greater than 120% of the rated value; for units with a rated input
power exceeding 30 W, the measured value of the input power shall not be greater than
110% of the rated value.
6.11 Exchange effectiveness
The measured value of the exchange effectiveness shall not be less than 90% of the
rated value, meanwhile it shall meet the requirements of Table 2.
6.23 Outdoor air PM2.5 filtration efficiency
The measured value of the outdoor air PM2.5 filtration efficiency of ERV shall not be
less than 95% of the rated value.
6.24 Alternating performance
The test results of the air volume and pressure, net outdoor airflow ratio in supply air
and heat exchange effectiveness under high air volume of ERV or ERC, after the
alternating performance test, shall not deviate by more than 3%, as compared with those
before the alternating performance test; meanwhile it shall meet the requirements of
Table 2.
7 Test method
7.1 Test conditions
7.1.1 The ERV and ERC under test shall meet the requirements of Chapter 5.
7.1.2 The ERV and ERC under test shall be tested according to the rated voltage and
rated frequency on the nameplate.
7.1.3 The rated performance test conditions of the ERV and ERC under test shall
comply with the provisions of Table 3.
7.1.4 The allowable deviation of the readings during the test shall comply with the
provisions of Table 4.
7.2 Appearance
The appearance of the tested ERV and ERC shall be inspected visually.
7.3 Startup and operation
7.3.1 During type inspection, adjust the input voltage of ERV/ERC (when applicable)
to 90% of the rated voltage; start at rated air volume or rated speed; run stably for 10
minutes; cut off the power supply; stop running; repeat 3 times; check whether the parts
are loose, noisy, overheated or have other abnormal phenomena.
7.3.2 During exit-factory inspection, start ERV or ERC at rated voltage; run stably at
maximum air speed or maximum speed; check whether the parts are loose, noisy,
overheated or have other abnormal phenomena.
7.4 Air volume
7.7 Input power
7.7.1 Measure the input power corresponding to the ERV and ERC (when applicable)
according to the test method specified in Appendix A and the test conditions specified
in Table 3.
7.7.2 Measure the input power corresponding to the ERV and ERC (when applicable)
installed on site, according to the test method specified in Appendix B.
7.8 Internal exhaust air leakage ratio
Measure the internal exhaust air leakage ratio, according to the test method specified in
Appendix C and the test conditions specified in Table 3.
7.9 External air leakage ratio
Measure the external air leakage ratio, according to the test method specified in
Appendix D and the test conditions specified in Table 3.
7.13 Energy efficiency coefficient
Measure the energy efficiency coefficient of ERV according to the test method specified
in Appendix F and the test conditions specified in Table 3.
7.14 Energy recovery ratio
Measure the energy recovery ratio of ERC according to the test method specified in
Appendix F and the test conditions specified in Table 3.
7.15 Condensation and condensed water
8 Inspection rules
8.1 Inspection classification
Inspection is divided into exit-factory inspection, sampling inspection, type inspection.
8.2 Exit-factory inspection
8.2.1 Each ERV or ERC must pass the manufacturer's inspection before it can be
shipped.
8.4 Type inspection
8.4.1 Type inspection shall be carried out in any of the following situations.
8.4.2 Type inspection shall be carried out according to the items specified in Table 6.
8.5 Judgment rules
8.5.1 For exit-factory inspection, sampling inspection, type inspection, as long as one
unit fails one of the items specified in Table 6, the batch of products shall be judged as
unqualified.
8.5.2 For type inspection, if one of the electrical safety items 16, 17, 18, 19, 20, 21, 22
specified in Table 6 fails, the products of the production cycle shall be judged as
unqualified.
9 Marking, packaging, transportation, storage
9.1 Marking
9.1.1 Each ERV and ERC shall have a nameplate and shall be fixed in a conspicuous
position.
9.1.2 The following contents shall be clearly marked on the nameplate.
9.1.3 For products manufactured in accordance with the standard, the performance
values marked on the nameplate shall be the values declared by the manufacturer under
standard air conditions and standard test conditions; the performance values under non-
standard working conditions may be marked in the sample or contract of the
manufacturer. When marked on the nameplate, the "nominal value" and the
corresponding environmental conditions shall be indicated.
9.4 Accompanying technical documents
The accompanying technical documents shall include at least the following.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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