ZEMCH 2019 International Conference Proceedings April.2020 | Page 43
2.3. Dust purification ability
Dust purification ability was conducted based on SPS‐KACA002‐132 (CA certification). Figure 3 is
a schematic diagram of a dust cleaning capability test apparatus, and is composed of a sampling probe,
a dust generator, a stirrer, and a particle counter. The dedicated area of the test body is defined as the
area of the room where the particle concentration of the room can be reduced to 50% of the initial
particle concentration by operating the test product for 10 minutes under natural ventilation conditions
once per hour when the test product is installed indoors. . At this time, the ceiling height of the room is
derived from the dedicated area calculation formula as shown in Equation (4), (5) on the basis of 2.4m.
Figure 3. Schematic diagram for the measurement of dust collection efficiency
(4)
(5)
3. Results
3.1. Experimental Results of Heat‐Recovery Ventilator by Filter grade
3.1.1. Airflow and power consumption test results
In the air flow and power consumption test, each type of HEPA filter was applied to a heat‐
recovery ventilator of 100CMH when only the pre‐filter was filled. According to KS B 6879, the test was
conducted at a static pressure of 100pa or more. The airflow change according to the grade of each type
of filter is shown in Figure 4. As a result of the experiment, when the H‐13 grade HEPA filter is applied,
the air volume decreases the most. Figure 5 shows the increase in power consumption at 100CMH by
applying each type of filter and adjusting the VSP value. When using the H13 filter, the power
consumption increased by 23% compared with the pre‐filter alone
A Study on the Performance Variations of a Heat-recovery Ventilation System Using a Pre-filter and
HEPA filters
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