ISO 16494-1:2022 熱回収換気装置とエネルギー回収換気装置—性能のテスト方法— Part 1: エネルギー関連の性能を評価するための測定基準の開発 | ページ 5

3.1

coefficient of energy

COE

C_COE

total exchanged energy between the airstreams plus the power value of moving air (3.22) , divided by the power input

Note 1 to entry: The formula for determining the coefficient of energy (C_COE) is given in 9.6.

3.2

duct

insulated or uninsulated closed passage for air that is installed as part of the ventilation system in lengths determined by the needs of application, and is separate, prior to installation from exterior terminations such as weather hoods

3.3

ducted ventilator

heat recovery ventilator or energy recovery ventilator which is intended for connection of ducts to one or more of the airflow inlets or outlets and intended to address a range of static pressure differentials from the duct(s)

3.4

effective work

EW

W_EW

total exchanged energy between the airstreams plus the power value of moving air minus the power input

Note 1 to entry: The formula for determining the effective work (W_EW) is given in 9.7.

Note 2 to entry: Effective work is expressed in W.

3.5

energy recovery ventilator

ERV

ventilator which is designed to transfer both heat and moisture between two isolated airstreams

3.6

entering exhaust air

exhaust air inlet

return airflow

RA

indoor air entering the ventilator

Note 1 to entry: Indicated in Figure 1 as footnote c.

3.7

entering supply air

supply air inlet

outdoor airflow

OA

outside air entering the ventilator

3.8

external static pressure difference

external static pressure difference between inlet and outlet of an air stream or vi versa and is calculated as an absolute value

Note 1 to entry: The formula for absolute value is described in 6.2.2.1.

3.9

fixed-plate exchanger

exchanger with multiple alternate airflow channels, separated by a heat or heat and water vapor transfer plate(s) and connected to supply and exhaust airstreams

3.10

fresh air mass flow rate

supply-mass flowrate of dry air at station 2

3.11

gross effectiveness

measured effectiveness, not adjusted for leakage, motor heat gain, or heat transfer through the unit casing

Note 1 to entry: The sensible, latent, or total gross effectiveness of an HRV or ERV, at equal airflows, is described in 9.5.

3.12

heat pipe exchanger

exchanger with an array of finned and sealed tubes that are placed in side-by-side supply and exhaust airstreams, which may include an internal wick structure in each tube and filled with a heat transfer medium

Note 1 to entry: thermosiphon exchangers are a subset (or type) of heat pipe exchanger in which the heat transfer medium moves by gravitational forces only.

3.13

heat recovery ventilator

HRV

ventilator which is designed to transfer only heat between two isolated airstreams

3.14

leaving exhaust air

exhaust air outlet

exhaust airflow

EA

indoor air after passing through the ventilator

Note 1 to entry: Indicated in Figure 1 as footnote d.

3.15

leaving supply air

supply air outlet

supply airflow

sa

outside air after passing through the ventilator

Note 1 to entry: Indicated in Figure 1 as footnote b.

3.16

maximum rated airflow

largest leaving supply and entering exhaust airflows, specified by the manufacturer, at which an airflow test is performed

Note 1 to entry: For ventilators with speed control devices, different maximum rated airflows may be defined for each speed control setting at which the test is performed.

3.17

minimum rated airflow

smallest leaving supply and entering exhaust airflows, specified by the manufacturer, at which an airflow test is performed

Note 1 to entry: For ventilators with speed control devices, different minimum rated airflows may be defined for each speed control setting at which the test is performed.

3.18

model-specific exterior termination system

weather hoods, fittings and through-wall penetrations designed by the ventilator manufacturer specifically for installation with a specific model of ventilator, that comprise the complete passageway connecting the ventilators outside air inlet and/or exhaust air outlet to the ventilator

3.19

net supply airflow

Q_2,net

portion of the leaving supply airflow that originated as entering supply airflow

Note 1 to entry: The net supply airflow is represented by the variable Q_2,net measured in m³/s.

Note 2 to entry: The formulae for determining net supply airflow are given in 9.4.1 (ducted units) and 9.4.2 (unducted units).

3.20

net supply airflow ratio

ratio determined by dividing net supply airflow by supply airflow

Note 1 to entry: Expressed as a percentage and described in 9.4.1 (see Formula (3)).

3.21

net supply mass flow rate

portion of the supply mass airflow rate at station 2 that originated as supply mass flow rate at station 2, accounting for R_UEATR

Note 1 to entry: See Formula (9) and Formula (13)

3.22

power value of moving air

P_vma

rate of pressure energy and kinetic energy of the air delivered by the ventilator

Note 1 to entry: The formula that determines the power value of moving air is given in 9.6.1.

Note 2 to entry: Power value of moving air is expressed in W for P_vma. (see Formula (10)).

3.23

rating points

sets of supply and exhaust airflows, static pressures at inlets and outlets, and speed control setting, achieved during the airflow performance measurement, at which thermal performance tests (and exhaust air transfer tests, if applicable) are performed

3.24

rotary exchanger

exchanger with porous discs, fabricated from materials with heat or heat and water vapour retention capacity, that are regenerated by collocated supply and exhaust airstreams

3.25

speed control device

device incorporated into the ventilator which controls the speed of the fan

3.26

station

location in the test apparatus at which conditions such as temperature, humidity, pressure, or airflows are measured

Note 1 to entry: Indicated in Figure 1 as footnotes a, b, c and d.

3.27

standard air

dry air with a density of 1,204 kg/m³ and a dynamic viscosity of 1,824 7 × 10⁻⁵ kg/(m∙s)

Note 1 to entry: These conditions approximate dry air at 20 °C and 101,325 kPa absolute.

3.28

static pressure differential

static pressure at supply outlet less the static pressure at exhaust inlet

Note 1 to entry: a positive pressure differential occurs when the static pressure at station (3.26) 2 is higher than the static pressure at station 3. A negative pressure differential occurs when the static pressure at station 2 is lower than the static pressure at station 3.

3.29

thermal performance measurement

test procedures which measure the temperature and humidity of the supply air when a ventilator is operating with the outside air and exhaust air at specific psychrometric conditions

3.30

unducted ventilator

heat recovery ventilator or energy recovery ventilator which is not intended for connection of ducts to any of the airflow inlets or outlets except for model-specific exterior termination systems as defined in 3.18

3.31

unit exhaust air transfer ratio

UEATR

R_UEATR

tracer gas concentration difference between the leaving supply air (3.15) and the entering supply air (3.7) divided by the tracer gas concentration difference between the entering exhaust air (3.6) and the entering supply air (3.7) , at a specified airflow

Note 1 to entry: The formula for R_UEATR is given in 9.3.

3.32

ventilator

self-contained unit that includes fans to move air through the heat/energy exchanger