oSIST prEN ISO 5117:2022
(Main)Automatic steam traps - Production and performance characteristic tests (ISO/DIS 5117:2022)
Automatic steam traps - Production and performance characteristic tests (ISO/DIS 5117:2022)
Kondensatableiter – Fertigungsprüfung und Prüfung der Funktionsmerkmale (ISO/DIS 5117:2022)
Dieses Dokument legt die Anforderungen an die fertigungsbegleitende und leistungsfähigkeitsbezogene Prüfung von automatischen Kondensatableitern fest, die zur Kondensatableitung/ rückgewinnung für eine optimierte Energieausnutzung in Raffinerien, bei der Stromerzeugung oder anderen allgemeinen Anwendungen eingesetzt werden, bei denen Dampf als Medium zur Wärmeübertragung verwendet wird.
Die Prüfungen lassen sich in fertigungsbegleitende Prüfungen und Prüfungen von Funktionsmerkmalen einteilen und können durchgeführt werden, um die korrekte Funktion eines Kondensatableiters sicherzustellen oder um die Leistung einer bestimmten Ausführung zu bewerten. Dieses Dokument legt die Prüfungen fest, die in Bezug auf jede dieser beiden Kategorien durchgeführt werden, und beschreibt die entsprechenden Prüfverfahren in Kürze.
Purgeurs automatiques de vapeur d'eau - Essais de production et essais des caractéristiques de fonctionnement (ISO/DIS 5117:2022)
Avtomatični izločevalniki kondenzata - Tehnološko in funkcijsko preskušanje (ISO/DIS 5117:2022)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 5117:2022
01-maj-2022
Avtomatični izločevalniki kondenzata - Tehnološko in funkcijsko preskušanje
(ISO/DIS 5117:2022)
Automatic steam traps - Production and performance characteristic tests (ISO/DIS
5117:2022)
Kondensatableiter – Fertigungsprüfung und Prüfung der Funktionsmerkmale (ISO/DIS
5117:2022)
Purgeurs automatiques de vapeur d'eau - Essais de production et essais des
caractéristiques de fonctionnement (ISO/DIS 5117:2022)
Ta slovenski standard je istoveten z: prEN ISO 5117
ICS:
23.060.01 Ventili na splošno Valves in general
oSIST prEN ISO 5117:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 5117:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 5117
ISO/TC 153 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2022-03-17 2022-06-09
Automatic steam traps — Production and performance
characteristic tests
Purgeurs automatiques de vapeur d'eau — Essais de production et essais des caractéristiques de
fonctionnementICS: 23.060.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 5117:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.ISO copyright office
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
Contents Page
Foreword ........................................................................................................................................................................................................................................iv
Introduction .................................................................................................................................................................................................................................v
1 Scope ................................................................................................................................................................................................................................. 1
2 Normative references ..................................................................................................................................................................................... 1
3 Terms and definitions .................................................................................................................................................................................... 1
4 Test methods ............................................................................................................................................................................................................ 1
4.1 General ........................................................................................................................................................................................................... 1
4.2 Production test — Shell testing .............................................................................................................................................. 2
4.3 Performance characteristic tests ........................................................................................................................................... 2
4.3.1 General ........................................................................................................................................................................................ 2
4.3.2 Minimum operating pressure ................................................................................................................................. 3
4.3.3 Maximum operating pressure (PMO) .............................................................................................................. 3
4.3.4 Maximum operating back pressure (PMOB) ............................................................................................. 3
4.3.5 Air venting capability ..................................................................................................................................................... 3
4.3.6 Operating temperature (TO) ................................................................................................................................... 3
4.3.7 Condensate capacity (QH or QC) .......................................................................................................................... 3
4.3.8 Live steam loss ..................................................................................................................................................................... 3
4.3.9 Determination of minimum operating pressure ................................................................................... 3
4.3.10 Determination of maximum operating pressure .................................................................................. 3
4.3.11 Determination of maximum operating back pressure ..................................................................... 4
4.3.12 Air venting capability test .......................................................................................................................................... 4
4.3.13 Determination of operating temperature .................................................................................................... 4
4.3.14 Condensate capacity test ............................................................................................................................................ 4
4.3.15 Determination of live steam loss ......................................................................................................................... 4
5 Inspection .................................................................................................................................................................................................................... 4
Annex A (normative) Determination of discharge capacity — Test methods .........................................................5
Annex B (normative) Determination of steam loss — Test methods .............................................................................19
Bibliography .............................................................................................................................................................................................................................31
iii© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 153, Valves.
This edition cancels and replaces ISO 6948:1981, ISO 7841:1988 and ISO 7842:1988, which have been
technically revised.The main changes compared to the previous edition are as follows:
— merging of ISO 6948:1981, ISO 7841:1988 and ISO 7842:1988;
— update of the technical content according to state-of-the-art;
— addition of the definition 3.2 on subcooling;
— addition in A.3.3 and in A.4.3 of a data sheet for test methods A and B on steam trap discharge
capacity;— addition of a computation formula (Formula (B.4) in B.3.3.3 b);
— addition in B.3.4 and B.4.4 of a data sheet for test methods A and B on steam loss test.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
Introduction
Testing of steam traps provides conformance of product performance to the intended function. This
document addresses the requirements for production testing and performance testing of steam traps.
Production test ensures the shell integrity to the maximum working pressure while the performance
test ensures the functional requirement of steam traps. Performance test should be considered as type
test.Testing is the most reliable method to validate a product including design, material selection and
manufacturing processes. It may also serve as a guide for steam traps selection. It can allow the users
to compare different types of steam traps, designs and brands.Currently the test requirements are mostly driven by the manufacturer or the users and each may have
their own specification. This document will create common understanding on the qualifications, and
end-user total cost-of-ownership by eliminating unintentional design flaws and planned obsolescence.
Ultimately, this document will improve performance and safety in the plants by enabling any customer
to specify durable type-tested industrial valves.© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 5117:2022(E)
Automatic steam traps — Production and performance
characteristic tests
1 Scope
This document specifies the test requirements for automatic steam trap used for condensate removal/
recovery services for optimized utilization of energy, in refinery, power generation or other general
applications where steam is used as a medium of heat transfer.The tests can be classified as production tests and performance characteristic tests and may be
conducted to ensure the correct functioning of a steam trap or to evaluate the performance of a
particular design. This International Standard specifies the tests to be performed relative to each one
of these two categories and briefly describes the corresponding test methods.2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp— IEC Electropedia: available at https:// www .electropedia .org/
3.1
production test
tests carried out by the manufacturer to confirm that each automatic steam trap functions correctly
Note 1 to entry: These tests may be witnessed by the purchaser or his representative. In this case, these tests are
referred to as acceptance tests.3.2
subcooling
temperature related phenomenon which can be defined as the difference between the steam saturation
temperature to the actual temperature of steam/condensate either at steam trap inlet or exit
Note 1 to entry: This may be the accountable parameter in some of the steam trap type like thermostatic steam
traps.Note 2 to entry: The water with temperature value below the saturation temperature is called as the subcooled
condensate. But also, the saturation temperature always corresponds to the pressure at which the system is
operating.4 Test methods
4.1 General
If the purchaser wishes to witness the tests, this shall be specified in the order. The manufacturer shall
give prior information of the date when the tests will be performed.© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
4.2 Production test — Shell testing
Each steam trap shall be tested to confirm the integrity of its shell under pressure. Further details are
given in subsequent Clauses.The test fluid, the choice of which is left to the discretion of the manufacturer, shall be either:
— water, which may contain a corrosion inhibitor, kerosene or any other suitable liquid having a
viscosity not greater than that of water;— steam, air, or any other suitable gas.
NOTE Various statutory authorities require specific approval of test procedures where the test is conducted
using steam, air, or other gas.Any internal trim which does not withstand the test pressure may be removed before the test.
The steam trap shall be essentially vented off air when testing with a liquid.Steam traps shall not be painted or otherwise coated with materials capable of sealing against leakage
before the shell pressure tests are completed. Chemical corrosion protection treatments and internal
linings are permitted. If pressure tests in the presence of a representative of the purchaser are specified,
painted steam traps from stock may be re-tested without removal of paint.Test equipment shall not subject the steam trap to externally applied stresses which may affect the
results of the tests.The shell test shall be performed by applying pressure inside the assembled steam trap with the ends
closed.For all steam traps, the hydraulic shell test shall be performed at a pressure 1,5 times the maximum
allowable pressure at 20 °C.For steam traps with a nominal diameter less than or equal to DN 50 in the pressure range up to PN 50
(Class 300), the shell test may be carried out either using liquid at a pressure equal to 1,5 times the
maximum allowable pressure at 20 °C or using gas at a pressure (gauge pressure) of 6 bar (0,6 MPa).
Visually detectable leakage through the pressure retaining walls is not acceptable.
Test durations shall not be less than those specified in Table 1.Table 1 — Minimum durations for shell tests
Nominal steam trap size Minimum test duration
DN s
DN < 50 15
65 < DN < 200 60
250 < DN 180
4.3 Performance characteristic tests
4.3.1 General
The operation performance of the steam trap shall be checked under the steam and condensate. The
test set up shall ably produce the steam and condensate in desired condition. Steam shall be fed into the
steam trap. Condensate shall be introduced intermittently if required.When only steam is present, the steam trap shall close. When the steam becomes condensate, the steam
trap shall open (the time taken will vary as a function of the steam trap type); when the condensate has
been discharged, the steam trap shall again close. The test is complete when at least one complete cycle
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
has been performed. The condensate can also be fed to the steam trap to quicken the cycle and to verify
the performance.Certain types of steam trap may be tested with air or water.
A manufacturer may describe the operations of a particular type of steam trap by referring to one or
more of the following performance characteristic tests. A brief explanation of the derivation of each
characteristic is given below.The performance test may be considered on sample basis as type test based on the type of steam
traps. Sample steam traps shall be tested to ensure that they open to discharge condensate and close
satisfactorily. Further details are given below. This test does not apply to the labyrinth (or orifice)
steam traps (see ISO 6704).4.3.2 Minimum operating pressure
The steam trap shall be tested to determine the minimum pressure (atmospheric or above) at which
correct opening, and closing will occur.4.3.3 Maximum operating pressure (PMO)
The steam trap shall be tested to determine the maximum pressure at which correct opening, and
closing will occur.4.3.4 Maximum operating back pressure (PMOB)
The steam trap shall be tested to determine the maximum pressure permissible at the outlet of the
device which allows correct functioning.4.3.5 Air venting capability
The steam trap shall be tested to determine its ability to discharge air.
4.3.6 Operating temperature (TO)
The steam trap shall be tested to determine the temperature at which the device operates and in
particular the temperature at which it passes its specified capacity.4.3.7 Condensate capacity (QH or QC)
The steam trap shall be flow tested to determine its condensate capacity throughout its operating
pressure range.4.3.8 Live steam loss
The steam trap shall be tested to determine the amount of live steam lost via the steam trap.
4.3.9 Determination of minimum operating pressureOperational checks, as described in 4.3.1, shall be carried out while successively reducing the test
pressure until the steam trap fails to open and close correctly.The minimum operating pressure is the lowest test pressure at which correct operation is observed.
4.3.10 Determination of maximum operating pressureThe maximum operating pressure of the steam trap may be verified by carrying out operational checks,
as described in 4.3.1, while successively increasing the test pressure up to the steam trap's maximum
operating pressure.© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
The steam trap shall open and close correctly throughout the test.
4.3.11 Determination of maximum operating back pressure
Operational checks, as described in 4.3.1, shall be carried out with the outlet from the steam trap
connected to a vessel in which the pressure can be raised, independent of the test pressure upstream
of the steam trap. While maintaining a reference pressure at the steam trap's inlet, the pressure at its
outlet is to be raised successively until the steam trap fails to open and close correctly.
The maximum operating back pressure is the highest pressure applied to the steam trap's outlet at
which correct operation is still observed.4.3.12 Air venting capability test
Air shall be introduced at a specified temperature into the steam trap or upstream piping. The air
venting capability shall be checked by an air flow measurement carried out at minimum and maximum
operating pressures, the temperature inside the steam trap being recorded.4.3.13 Determination of operating temperature
Steam shall be fed into the steam trap to effect closure. Condensate, at saturated steam temperature,
shall then be introduced and, unless the steam trap opens immediately, shall be allowed to cool slowly
at the steam trap's inlet.The temperature of the condensate, measured at the steam trap's inlet, at which the device opens, is the
operating temperature.The operating temperatures are the temperatures of the condensate, measured at the inlet to the steam
trap, at which the steam trap passes its specified capacities.4.3.14 Condensate capacity test
The capacity of the steam trap shall be determined by measuring the amount of condensate that is
discharged from the device under specified conditions of pressure differential and condensate
temperature.The test shall be carried out with condensate at different temperatures and at different pressures
within the steam trap's operating range to be specified, according to the test requirements detailed in
Annex A.4.3.15 Determination of live steam loss
To determine the amount of live steam lost, if any, by the steam trap, use one of the test methods in
Annex B.5 Inspection
Samples of the finished steam traps shall be visually examined and dimensionally checked to ensure
that the steam traps correspond to the stated specification and shall be marked in accordance with
ISO 6553.© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
Annex A
(normative)
Determination of discharge capacity — Test methods
A.1 General
This Annex specifies two test methods to determine the discharge capacity of automatic steam traps.
A.2 Test arrangementsThe test arrangements for condensate capacity determination are shown in Figures A.1 and A.2.
To reduce thermal losses to a minimum, all piping and equipment shall be insulated to a value R, in
2 −1m ⋅°C⋅h⋅J , according to Formula (A.1).
R≥×07, 510 (A.1)
The instruments used for the measurements shall comply with International Standards, if such
standards exist, for example:— ISO 651, ISO 652, ISO 653 and ISO 654 for temperature measurements;
— ISO 4185, ISO 5167 and ISO 5168 for flow measurements.
The condensate removal device shall not be modified in any way from its commercial form.
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
Key
A water supply K drain
B flow meter q L test device
C steam water mixer M water-cooled condenser
D flow meter q N scale
E calorimeter V1 valve 1
F steam supply V2 valve 2
G steam vent V3 valve 3
H flash tank accumulator V5 valve 5
I temperature difference indicator Δθ AA arrangement A
J gate or full bore valve BB arrangement B
NOTE 1 The diameter of the pipework from the accumulator to the condensate removal device is the same as,
or greater than, the diameter of the pipework to the inlet connection on the device.
NOTE 2 The distance L does not exceed 10 internal pipe diameters.NOTE 3 The distance L is not less than 10 or not more than 20 internal pipe diameters.
NOTE 4 The distance Z is measured vertically from the centre of the inlet connection to the condensate
removal device.Figure A.1 — Test arrangement for test method A
© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
Key
A vent N test device
B safety valve O slope
C pressure reducing valve P vacuum breaker
D steam supply Q distance between sensors and test device
E circulator R open pit
F calibrated scale V1 valve 1
G temperature controller (optional) V2 valve 2
H scale V3 valve 3 – temperature control
I injector line V4 valve 4
K accumulator V5 valve 5 – gate or full bore ball valve
L gauge glass V6 valve 6 – gate or full bore ball valve
M cold water V7 valve 7
NOTE 1 The piping from the accumulator to the test device is of the same diameter as the inlet connection on
the test device. This inlet to the piping from the accumulator is well rounded.NOTE 2 The distance Q between the sensors and the test device does not exceed 20 internal pipe diameters.
NOTE 3 The distance Z is measured vertically from the centre of the inlet pipe connection of the test device
and does not exceed the distance shown in the Figure.NOTE 4 In the Figure, a steam injector is used for heating the water in the accumulator. It is also possible to
use a steam circulating coil inside the accumulator or any other means.Figure A.2 — Test arrangement for test method B – Continuous and intermittent flow
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oSIST prEN ISO 5117:2022
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A.3 Test method A
A.3.1 Procedure
The method A is applicable only to continuous discharge measurement.
It is emphasized that Figure A.1 shows two alternative test arrangements for condensate measurement
and that the choice is left to the test laboratory.Start with all valves closed.
a) Warm up the system by gradually opening valves 1, 2, 3, 4 and 5.
b) Adjust valves 1, 2 and 3 with valve 4 wide open and valve 5 closed to bring the system into
equilibrium. Equilibrium is defined as a steady water level in the accumulator with the vent valve 3
partially open and a difference of 3 °C or less showing on the temperature differential indicator.
c) Observe and record the following data as appropriate depending on the method of condensate
determination:p = steam supply pressure, in bar(g) or MPa(g);
p = accumulator steam pressure, in bar(g) or MPa(g);
p = steam trap inlet pressure, in bar(g) or MPa(g);
p = steam trap outlet pressure, in bar(g) or MPa(g);
θ = steam supply temperature, in °C;
θ = Water supply temperature, in °C;
Δθ = temperature differential (subcooling) between steam in the accumulator and fluid entering
the steam trap, in °C;X = steam supply quality, in %;
Z = accumulator water level, in m;
Δt = time interval, in h, min or s;
q = water supply flowrate, in kg/h;
q = steam supply flowrate, in kg/h;
m = mass of condensate and tank at start, in kg;
m = mass of condensate and tank at end, in kg;
d) Record the data specified in A.3.1 c) at 5 min intervals for a minimum total of five sets of
observations.e) During the test period observations as appropriate shall not exceed the following limits:
— the difference between the maximum and minimum tank level shall not exceed 50 mm;
— the maximum value of the tank level shall not exceed 450 mm at any time during the test;
— the maximum temperature differential (Δθ) shall not exceed 3 °C during the test;
— no individual steam trap inlet pressure (p ) observation shall vary by more than 1 % of the
average of all observations;© ISO 2022 – All rights reserved
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oSIST prEN ISO 5117:2022
ISO/DIS 5117:2022(E)
— the calculated vent steam flowrate (q ) shall not exceed a maximum value equal to an exit
velocity of 0,31 m/s in the tank.f) Repeat the operations specified in A.3.1 a) to e), as necessary to produce three sets of observations
which result in three calculated capacity ratings, none of which varies from the average by more
than 10 %.A.3.2 Flow calculations
Flow shall be calculated according to Formulae (A.2) to (A.7).
q = (q + q - q ) ± q (A.2)
mf m1 m3 m4 m8
mm−
cc21
q = ×3600 (A.3)
where
q is the discharge flow, in kg/h;
q is the water flow, in kg/h;
q is the steam flow to heat water supply (q ), in kg/h.
m3 m1
()hh−
qq=× (A.4)
mm31
hh−
where
q is the flash steam flow in the accumulator, in kg/h.
hh−
qq=+q × (A.5)
mm41 m3
()hh−
π D
q =× ××03, 1 3 600 (A.6)
mm4, ax
4 V
π ()ZZ− 3600
qD=× × × (A.7)
4 ΔtV
where
q is the accumulator storage rate, in kg/h.
m is the mass of condensate and tank at start, in kg;
m is the mass of condensate and tank at end, in kg;
h is the specific enthalpy of the supply water, in kJ/kg;
h is the specific enthalpy of the supply steam, in kJ/kg;
h is the specific enthalpy of saturated water at the supply pressure, in kJ/kg;
h is the specific enthalpy of saturated steam in the accumulator, in kJ/kg;
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oSIST prEN ISO 5117:2022
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h is the specific enthalpy of saturated water in the accumulator, in kJ/kg;
v is the specific volume of saturated steam in the accumulator, in m /kg;
v is the specific volume of saturated water in the accumulator, in m /kg;
Δt is the time interval, in s;
D is the inside diameter of the accumulator,
...
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