ISO 22967:2010 強制ドラフトガスバーナー | ページ 6

3.1.1

強制ドラフトバーナー

燃焼用の全空気がファンによって供給されるバーナー

3.1.2

自動強制ドラフトバーナー

バーナーの点火、火炎監視、およびオン/オフの切り替えが自動的に行われる、自動点火、火炎監視、およびバーナー制御装置を備えたバーナー

注記 1:バーナーの熱入力は、運転中に自動または手動で調整できます。

3.1.3

二重燃料バーナー

気体燃料と液体燃料の両方を同時にまたは連続して燃焼できるバーナー。

3.1.4

完全予混合バーナー

ガスの完全燃焼のために空気の一部または全部が混合物出口ポートの上流でガスと混合されるバーナー。

3.1.5

ノズル混合バーナー

ガスの燃焼に必要な空気の一部または全部が、空気ポートまたはガスポートの下流でガスと混合されるバーナー。

3.1.6

一体型点火バーナー

バイパス始動ガス供給による減速率の直接主点火バーナーを備えたバーナー

3.1.7

開始スロットル率

バーナーの始動時に点火装置によって点火されるガス率。

3.1.8

燃焼室

燃焼が起こる器具の部分

3.1.9

バーナーヘッド

燃料と空気を混合するための装置。例えば、バーナーの作動中に火炎を安全な位置に保つ安定ディスクとノズルを含む。

3.1.10

熱媒体

器具から熱エネルギーを輸送するためのガス状または液体状の物質

3.1.11

アプライアンス

バーナーが燃焼する熱発生器:燃焼室と熱交換器を持ち、バーナーの燃焼ガスから熱伝達媒体に熱入力を間接的に伝達するために使用される

3.2.1

reference conditions

conditions corresponding to a temperature of 15 °C and a pressure of 0,101 325 MPa, unless otherwise specified

Note 1 to entry: Based on standard reference conditions specified in ISO 13443.

3.2.2

calorific value

quantity of heat produced by the combustion, at a constant pressure equal to 0,101 325 MPa, of unit volume or mass of gas, the constituents of the combustible mixture being taken at reference conditions and the products of combustion being brought back to the same conditions

See ISO 14532.

3.2.3

relative density

d

ratio of the masses of equal volumes of dry gas and dry air at the same conditions of temperature and pressure

Note 1 to entry: Adapted from ISO 80000-4:2006, 4-3.

3.2.4

Wobbe index

ratio of the calorific value of a gas per unit volume and the square root of its relative density under the same reference conditions

Note 1 to entry: The Wobbe index is said to be superior ( W_s) or inferior ( W_i) depending on whether the calorific value used is superior or inferior.

Note 3 to entry: Adapted from ISO 14532:2005, definition 2.6.4.4.

3.2.5

gas pressure

static pressure of the moving gas, relative to the atmospheric pressure, measured at right angles to the direction of flow of the gas

Note 1 to entry: Gas pressure is expressed in pascals or units thereof (Pa, kPa, MPa).

3.2.6

line-conveyed gas

gaseous fuels available by line-conveyed supply on site on which burners operate under nominal conditions when supplied at the corresponding normal pressure

3.2.7

normal pressure

pressure under which burners operate in nominal conditions when supplied with the corresponding line-conveyed gas

3.2.8

limit pressures

pressures representative of the extreme variations in the burner supply conditions

Note 1 to entry: The test pressures are given in Table 4.

3.2.9

supply pressure

pressure measured immediately upstream of all gas line components but downstream of the manually operated shut-off valve

3.2.10

adjustment pressure

pressure measured immediately downstream of the pressure regulator

3.2.11

burner head pressure

pressure measured immediately before the burner head

3.3.1

combustion chamber pressure

p_F

effective positive pressure or negative pressure relative to the atmospheric pressure prevailing in the combustion chamber

Note 1 to entry: Combustion chamber pressure is measured in kilopascals (kPa).

3.3.2

length of the combustion chamber

l₁

distance between the face of the nozzle or the fuel outlet and the rear wall of the test flame tube or combustion chamber or any lateral contraction

Note 1 to entry: The length of the combustion chamber is measured in metres (m).

3.3.3

diameter of the combustion chamber

d₁

inner diameter of the combustion chamber around the flame tube of the burner

Note 1 to entry: The diameter of the combustion chamber is measured in metres (m).

3.3.4

burner flame tube

device which hosts the mixing device and the root of the flame

3.3.5

test flame tube

cylindrical part of the test rig where the combustion take place

3.4.1

content of carbon dioxide

co₂

ratio of the volume of carbon dioxide to the total volume of dry gaseous products in which it is present

Note 1 to entry: The carbon dioxide content is expressed as a percentage volume fraction.

3.4.2

content of oxygen

O₂

ratio of the volume of oxygen to the total volume of dry gaseous products in which it is present

Note 1 to entry: The oxygen content is expressed as a percentage volume fraction.

3.4.3

content of carbon monoxide

co

ratio of the volume of carbon monoxide to the total volume of dry gaseous products in which it is present

Note 1 to entry: The carbon monoxide content is expressed as a volume fraction, in units of millilitres per cubic metre (ml/m³) for measuring purposes and in milligrams per kilowatt hour (mg/kWh) related to inferior calorific value ( H_i) for calculation purposes and declaring values.

3.4.4

content of nitrogen oxides

no_x

ratio of the combined volume of nitrogen oxides to the total volume of dry gaseous products in which they are present

Note 1 to entry: The nitrogen oxides content is expressed as a volume fraction, in units of millilitres per cubic metre (ml/m³) for measuring purposes and in milligrams per kilowatt hour (mg/kWh) related to inferior calorific value ( H_i) for calculation purposes and declaring values.

3.4.5

excess air ratio

λ

ratio between the effectively introduced quantity of air and the theoretically required quantity of air

3.5.1.1

volume flow rate

q_V

volume of gas consumed by the burner in unit time during continuous operation

3.5.1.2

nominal volume flow rate

volume flow rate stated by the manufacturer, expressed in cubic metres per hour (m³/h) at reference conditions

3.5.1.3

maximum flow rate

highest flow rate stated by the manufacturer, expressed in cubic metres per hour (m³/h) at reference conditions

3.5.1.4

minimum flow rate

lowest flow rate stated by the manufacturer, expressed in cubic metres per hour (m³/h) at reference conditions

3.5.1.5

mass flow rate

q_m

mass of gas consumed by the burner in unit time during continuous operation

3.5.1.6

nominal mass flow rate

mass flow rate stated by the manufacturer

3.5.1.7

heat input

Q_F

amount of heat expressed as a function of time released by the burner at a given throughput

Note 1 to entry: Heat input is expressed in kilowatts (kW) and is calculated as gas flow rate x inferior calorific value ( q_{V g}H_i ) of the fuel.

3.5.1.8

nominal heat input

Q _FN

value of the heat input declared by the manufacturer

Note 1 to entry: It is expressed in kilowatts (kW).

Note 2 to entry: Fixed heat input or range-rated burners have a single nominal heat input. Range-rated burners can be adjusted between the maximum nominal heat input and the minimum nominal heat input declared by the manufacturer.

3.5.1.9

minimum heat input

Q_Fmin

lowest heat input specified by the manufacturer at which the burner can operate in accordance with the operational requirements

Note 1 to entry: It is expressed in kilowatts (kW).

3.5.1.10

maximum heat input

Q_Fmax

highest heat input specified by the manufacturer at which the burner can operate in accordance with the operational requirements

Note 1 to entry: It is expressed in kilowatts (kW).

3.5.1.11

start heat input

Q_s

maximum heat input at the start of ignition as a percentage of the heat input, Q_F

3.5.2.1

burners for permanent operation

burners that are designed to remain in the running condition for more than 24 h without interruption

3.5.2.2

burners for intermittent operation

burners that are designed to remain in the running condition for less than 24 h

3.6.1

gas line

part of the burner made up of the valves, controls and safety devices, in which gas is conveyed between the inlet connection and the burner head

3.6.2

range-rating device

component on the burner intended to be used for adjusting the heat input, within a range of heat inputs stated by the manufacturer, to suit the actual heat requirements of the installation

Note 1 to entry: This adjustment may be progressive or in discrete steps.

3.6.3

automatic shut-off valve

valve which opens when energized and closes automatically when de-energized

3.6.4

filter

strainer

device that enables foreign elements, which might otherwise cause failures in the system, to be collected

3.7.1

pressure regulator

device which maintains the downstream pressure constant to within fixed limits independent of variations, within a given range, of the upstream pressure

3.7.2

adjustable pressure regulator

pressure regulator fitted with a means of adjusting the loading on the diaphragm and thus the downstream pressure

3.7.3

gas pressure protection device

device that compares the actual value of the pressure with the desired value, gives a signal when the actual value exceeds or drops below the desired value and initiates the shut-off sequence

3.7.4

flame detector device

device by which the presence of a flame is detected and signalled

Note 1 to entry: It can consist of a flame sensor, an amplifier and an element for signal transmission. These parts, with the possible exception of the actual flame sensor, may be assembled in a single housing for use in conjunction with a programming unit.

3.7.5

automatic burner control system

system comprising at least a programming unit and all the elements of a flame detector device

Note 1 to entry: The various functions of an automatic burner control system may be in one or more housings.

3.7.6

programming unit

unit that reacts to signals from control and safety devices, gives control commands, controls the start-up sequence, supervises the burner operation and causes controlled shut-down and, if necessary, safety shut-down and non-volatile lock-out

Note 1 to entry: The programming unit follows a predetermined sequence of actions and always operates in conjunction with a flame detector device.

3.7.7

safe start check

procedure employing a protection circuit or circuits to establish whether or not a fault in a safety system or flame simulating condition exists prior to start-up

3.7.8

controlled shut-down

process by which the power to the gas shut-off valve(s) is immediately removed before any other action takes place (e.g. as a result of activating a controlling function)

3.7.9

safety shut-down

process that is effected immediately following the response of a safety limiter or the detection of a fault in the automatic burner control system and which puts the burner out of operation by immediately removing the power to the fuel shut-off valve(s) and the ignition device

Note 1 to entry: Safety shut-down can also occur as a result of an interruption/decrease of the power supply.

3.7.10

non-volatile lock-out

safety shut-down condition of the system, such that a restart can only be accomplished by a manual reset of the system and by no other means

3.7.11

start signal

signal (e.g. from a thermostat) which releases the system from its start position and commences the predetermined programme

3.7.12

recycling

process by which, after a safety shut-down, a full start-up sequence is automatically repeated

3.7.13

valve-proving system

VPS

system used to check the effective closure of the start gas or main gas safety shut-off valves, and which is capable of detecting small gas leakage rates

3.7.14

ignition device

any means used to ignite the fuel at the ignition burner or at the main burner

3.7.15

running position

position of the system in which the burner is in normal operation under the supervision of the programming unit and its flame detector device

3.7.16

purge

forced introduction of air into the combustion chamber and flue passages, in order to displace any remaining fuel/air mixture and/or products of combustion

3.7.17

pre-purge

purge which takes place between the start signal and energizing of the ignition device

3.7.18

post-purge

purge which takes place immediately after a controlled shut-down

3.8.1

pre-purge time

period during which purge takes place at the proven air rate prior to energizing the ignition device

Note 1 to entry: It is expressed in seconds (s).

3.8.2

post-purge time

period between any shut-down and the moment the fan is switched off

Note 1 to entry: It is expressed in seconds (s).

3.8.3

ignition time

period between the release of the fuel and the first indication of the flame by the flame detector device

Note 1 to entry: It is expressed in seconds (s).

3.8.4

first safety time

period between the energizing and de-energizing of the pilot gas valve, start gas valve or main gas valve(s), as applicable, if the flame detector device signals the absence of a flame

Note 1 to entry: Where there is no second safety time, this period is simply called the “safety time”.

3.8.5

second safety time

period, in the case of a first safety time applicable to either a pilot or start gas flame only, between the energizing and de-energizing of main gas valves if the flame detector device signals the absence of a flame

3.8.6

flame extinction safety time

period that starts with the signal that the flame has been extinguished and ends with the signal to de-energize the safety shut-off valve of the gas supply

3.8.7

total closing time

period that starts with the signal that the flame has been extinguished and ends with the shut-off valves being closed

3.9.1

flame stability

capacity of the flame to remain on the burner head or in the flame reception zone intended by the design

3.9.2

flame lift

total or partial lifting of the base of the flame away from the burner head or the flame holding zone provided by the design

3.9.3

light back

unintended movement of the flame front to a point upstream of its normal stable operating position

3.10.1

working diagram

admissible range of application of the burner (pressure in the combustion chamber as a function of heat input)

3.10.2

test diagram

test range of the burner during the tests (pressure in the combustion chamber as a function of heat input)