GB/T 21087-2020Energy recovery ventilators for outdoor air handling (English PDF)

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.

4.1 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:

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.

7.1 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

8.1 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.

9.1 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. […]