ISO 24365:2022 ラジエーターとコンベクター — 熱出力を決定するための方法と定格 | ページ 6

3.1.1

heating appliance

device having the purpose of transferring heat in order to provide specific temperature conditions inside buildings

3.1.2

independent heating appliance

self-contained heating appliance (3.1.1) which does not need to be connected to a remote energy source (e.g. a boiler) as it contains its own energy source (e.g. gas fired appliances, electric appliances, air to air heat pump appliances)

3.1.3

radiator

heating appliance (3.1.1) produced with different materials (e.g. steel, aluminium, cast-iron) and with different designs (e.g. plate type, column type, tube type, finned tube type), which emits heat by free convection and radiation

3.1.4

sectional heating appliances

heating appliance (3.1.1) manufactured in sections of identical design and traded in this form, which can be joined together into modular assemblies so that the desired output can be obtained

Note 1 to entry: Mainly applied to radiators (3.1.3) .

3.1.5

convector

heating appliance (3.1.1) which emits heat almost entirely by free convection

Note 1 to entry: A convector comprising at least a heat emitter and a casing which provides an unheated convective chimney of defined height.

3.1.6

skirting convector

special convector (3.1.5) of limited height running along the base of an interior wall

3.1.7

dry heating surface

secondary heating surface

portion of the heat emitting surface which is in contact with air only (e.g. fins projecting from the wet surface)

3.1.8

family of heating appliances

group of heating appliances (3.1.1) of similar design and construction and of identical material, positions of primary fluid connections and other related variables that particularly affect the conditions of flow of the primary fluid within the heating appliance (3.1.1)

3.1.9

model

heating appliance (3.1.1) of defined height, length and depth within a type

3.1.10

range of heights

difference between the maximum and minimum height of the models (3.1.9) in a type

3.1.11

module

<heating appliance>

reference length of the useful portion of a heating appliance (3.1.1)

3.1.12

sample

representative heating appliance (3.1.1) used for the determination of one or more of the performance characteristics

3.1.13

inlet water temperature

bulk temperature of the water entering the heating appliance (3.1.1)

3.1.14

outlet water temperature

bulk temperature of the water leaving the heating appliance (3.1.1)

3.1.15

temperature drop

difference between inlet (3.1.13) and outlet water temperature (3.1.14)

3.1.16

mean water temperature

arithmetical mean of inlet (3.1.13) and outlet water temperature (3.1.14)

3.1.17

reference air temperature

air temperature measured on the vertical line at the centre of the test booth, 0,75 m above the floor level

3.1.18

excess temperature

difference between mean water temperature (3.1.16) and reference air temperature (3.1.17)

3.1.19

standard excess temperature

excess temperature (3.1.18) of 50 K as determined in the standard conditions

Note 1 to entry: Inlet water temperature (3.1.13) of 75 °C, outlet water temperature (3.1.14) of 65 °C and reference air temperature (3.1.17) of 20 °C.

3.1.20

air pressure

measured value at the test site

3.1.21

water flow rate

amount of water flowing through the heating appliance (3.1.1) per unit of time

3.1.22

standard water flow rate

water flow rate (3.1.21) relating to standard test conditions

3.1.23

standard rated thermal output

thermal output of a heating appliance (3.1.1) defined at 50 K excess temperature (3.1.18)

3.1.24

standard low temperature thermal output

thermal output of a heating appliance (3.1.1) defined at 30 K excess temperature (3.1.18)

3.1.25

characteristic equation

power function with a specific characteristic exponent that gives the thermal output as a function of the excess temperature (3.1.18) at constant water flow rate (3.1.21)

3.1.26

standard characteristic equation

characteristic equation (3.1.25) which is valid for standard water flow rate (3.1.22) and from which the standard thermal output can be found for the standard excess temperature (3.1.19) of 50 K

3.1.27

test installation

3.1.28

test system

3.1.29

pressure drop

difference of pressure between water inlet and water outlet of the heating appliance (3.1.1)

3.1.30

supplementary test

test for the purpose of establishing the effect of minor technical modifications on the thermal output of radiators (3.1.3) that have already been tested

3.1.31

radiated heat output factor

sk

assumed ratio between the radiation heat output and the overall heat output of the radiator (3.1.3) , which is only valid for air pressure (3.1.20) correction purposes

3.1.32

exponent n_p

exponent for the air pressure (3.1.20) correction of the measured heat output of the radiator (3.1.3)

3.1.33

emissivity

ε

ratio of energy radiated by a particular material to energy radiated by a black body at the same temperature

3.1.34

master radiator

sample (3.1.12) used for the calibration of test installations (3.1.27)

Note 1 to entry: Master radiators are used to determine repeatability and reproducibility of the results of the test installations (3.1.27) (see 5.2.3).