1、BRITISH STANDARD BS ISO 14269-2:1997 Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment Part 2: Heating, ventilating and air-conditioning test method and performance ICS 65.060.01BSISO14269-2:1997 This British Standard, having been prepared under the dir
2、ection of the Engineering Sector Board, was published under the authorityof the Standards Board and comes into effect on 15 May 1998 BSI 04-1999 ISBN 0 580 29852 3 National foreword This British Standard reproduces verbatim ISO 14269-2:1997 and implements it as the UK national standard. The UK parti
3、cipation in its preparation was entrusted to Technical Committee AGE/6, Agricultural tractors and forestry machinery, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals f
4、or change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement internationa
5、l or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all
6、 the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and
7、ii, theISO title page, page ii, pages 1 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO14269-2
8、:1997 BSI 04-1999 i Contents Page National foreword Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Test equipment and instruments 1 5 Measurement locations 2 6 Common minimum performance requirements 2 7 Common test procedures 2 8 Air-conditioning system test 2 9
9、 Heating system test 3 10 Ventilation test 3 11 Tests report 3 Annex A (informative) Example of test report form for operator enclosure heating, ventilation and air-conditioning systems 6 Figure 1 Operator enclosure temperature chart 4 Figure 2 Temperature and velocity locations 5ii blankBSISO14269-
10、2:1997 ii BSI 04-1999 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
11、 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 Commissio
12、n (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International S
13、tandard ISO14269-2 was prepared by Technical Committee ISO/TC23, Tractors and machines for agriculture and forestry, Subcommittee SC2, Common tests. This first edition, along with the other parts of ISO14269, cancels and replaces ISO3737:1976, ISO6097:1989 and ISO/TR8953:1987, which have been techni
14、cally revised. ISO14269 consists of the following parts, under the general title Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment: Part 1: Vocabulary; Part2: Heating, ventilation and air-conditioning test method and performance; Part 3: Determination o
15、f effect of solar heating; Part 4: Air filter element test method; Part 5: Pressurization system test method. Annex A of this part of ISO14269 is for information only. Descriptors: Agricultural machinery, forest equipment, self-propelled machines, agricultural tractors, operating stations, enclosure
16、s, environments, working conditions, heating, ventilation, air conditioning, tests, performance tests.BSISO14269-2:1997 BSI 04-1999 1 1 Scope This part of ISO14269 specifies a uniform test method for measuring the contribution to operator environmental temperature and humidity provided by an air-con
17、ditioning, heating and ventilation system operating in a specific ambient environment for tractors and self-propelled machines for agriculture and forestry. The method may not determine the complete climatic environment of the operator since this is also affected by heat load from sources other than
18、 those on the machine, for example solar heating. It is recommended that part3 of ISO14269 be used in conjunction with this part to determine more accurately the complete heat loading on the operator enclosure. Minimum performance levels for the machines operator enclosure air conditioning, heating
19、and ventilation systems are established in this part. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO14269. At the time of publication, the editions indicated were valid. All standards are subject to r
20、evision, and parties to agreements based on this part of ISO14269 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 2288:1997, Agricultural tra
21、ctors and machines Engine test code Net power. ISO 5353:1995, Earth-moving machinery, and tractors and machinery for agriculture and forestry Seat index point. ISO 5721:1989, Tractors for agriculture Operators field of vision. ISO 14269-1:1997, Tractors and self-propelled machines for agriculture an
22、d forestry Operator enclosure environment Part 1: Vocabulary. ISO 14269-4:1997, Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment Part 4: Air filter element test method. ISO 14269-5:1997, Tractors and self-propelled machines for agriculture and forestry
23、 Operator enclosure environment Part 5: Pressurization system test method. 3 Definitions For the purposes of this part of ISO 14269, the definitions given in ISO 14269-1 apply, of which the following are particularly relevant. 3.1 effective temperature combination of relative humidity and temperatur
24、e which can indicate the level of comfort perceived by the human body ISO 14269-1:1997, definition 2.1 3.2 operator enclosure temperature chart diagram of the range of effective temperatures in which the operator environment within the operator enclosure is perceived as desirable ISO 14269-1:1997, d
25、efinition 2.2 NOTESeeFigure 1. 3.3 operator environment space surrounding the operator as defined by temperature and velocity measurement points ISO 14269-1:1997, definition 2.3 NOTESeeFigure 2. 3.4 operator enclosure part of the machine which completely surrounds the operator, preventing the free p
26、assage of external air, dust or other substances into the area around the operator ISO 14269-1:1997, definition 2.4 3.5 air-conditioning system system which lowers the effective temperature of the air within the operator enclosure ISO 14269-1:1997, definition 2.5 3.6 heating system system which rais
27、es the effective temperature of the air within the operator enclosure ISO 14269-1:1997, definition 2.8 3.7 ventilation system system which provides fresh air to, and maintains air circulation within, the operator enclosure ISO 14269-1:1997, definition 2.11 4 Test equipment and instruments 4.1 Test e
28、nclosure, sufficiently large to contain the base machine with provisions to circulate conditioned air and to load the machines engine and transmission. 4.1.1 Field test conditions may be used. 4.1.2 If it is not practical to test the base machine due to physical size limitations, the operator enclos
29、ure may be bench tested with the loads imposed by the base machine on the operator enclosure simulated. If this procedure is used, correlation with field data shall be established.BSISO14269-2:1997 2 BSI 04-1999 4.2 Temperature measuring devices, with a measuring accuracy of 0,5C. 4.3 Pressure measu
30、ring devices, with a measuring accuracy of2% of the observed values. 4.4 Device to measure wet bulb temperature, with a measuring accuracy of 0,5 C of the observed values. 4.5 Device to measure operator enclosure pressurization, with a measuring accuracy of10% of the observed values. 4.6 Device to m
31、easure rotational frequency (r.p.m.), with a measuring accuracy of2% of the observed values. 4.7 Device to measure air velocity, with a measuring accuracy of10% of the observed values. 4.8 Device to measure blower voltage and clutch voltage, with a measuring accuracy of2% of the observed values. 4.9
32、 Device to measure time, with a measuring accuracy of 0,5s of the observed values. 5 Measurement locations SeeFigure 2. The locations of the temperature and velocity measurement points are based on the seat index point described in ISO5353. 5.1 The ambient air temperatures shall be measured at a loc
33、ation where the ambient air is not affected by the machine and at a height equivalent to the air intake height on the operator enclosure. 5.2 The operator enclosure pressurization shall be measured according to ISO14269-5. 5.3 Dry bulb temperatures shall be measured as close as is practical to posit
34、ions 1 to 6 inFigure 2. 5.4 Wet bulb temperature shall be measured at position6 inFigure 2. 5.5 It is recommended that the air velocity at the eyes (position7 of Figure 2) be measured in accordance with ISO5721. NOTEIf an alternative operator station position is available (for example, a reversible
35、operator station), the alternate positions should also be tested with a comparable array of measurement locations. 6 Common minimum performance requirements 6.1 The operator enclosure should be capable of maintaining a minimum pressurization of50Pa throughout the test, as outlined in ISO14269-5. Max
36、imum pressurization shall not exceed200Pa. 6.2 Under all conditions of air-conditioning, heating or ventilation, a minimum of43m 3 /h of filtered fresh air shall be provided. 6.3 Under all conditions of air-conditioning, heating or ventilation, the temperatures measured in the operators environment
37、shall be uniform within5C. 6.4 Filtered fresh air shall be passed through a filter that is a minimum of96% efficient using fine test dust and test procedure defined in ISO14269-4. 6.5 It is recommended that a means be provided to limit the maximum air velocity at position7 inFigure 2 to0,3m/s. Adjus
38、table diffusers may be used to redirect air. 7 Common test procedures 7.1 The test conditions specified in8.1, 9.1 and10.1 shall be maintained throughout the duration of the respective test. 7.2 Record the temperatures as specified in5.3 and5.4 at intervals not greater than 5min. 7.3 Dry bulb temper
39、atures from all six locations shall be averaged for each reading interval. 7.4 The test shall be considered terminated when either of the following conditions is fulfilled: a) the minimum temperature recorded in clause7.3 does not vary by more than0,5C in 15min; or b) the test has run for 1h. 7.5 Th
40、e data obtained at the termination of the heating or air conditioning test shall be compared with the operator enclosure temperature chart shown in Figure 1. 7.6 An operator may be present in the operator enclosure throughout the duration of the test. 8 Air-conditioning system test 8.1 Test conditio
41、ns 8.1.1 The air-conditioning system shall be tested in the intended production configuration, adjusted within the manufacturers specifications. 8.1.2 The ambient conditions for moderate temperature and high humidity shall be: a) minimum dry bulb temperature:32C; b) minimum wet bulb temperature:25C;
42、 c) maximum air velocity passing the machine from front to rear:5m/s. 8.1.3 The machine shall be operated at rated engine speed in a mode which will provide at least one half of the maximum rated net engine power. Net engine power shall be determined in accordance with ISO2288. NOTELoading of the en
43、gine through the transmission is recommended. Engine loading is recommended only when the engine or component temperatures (such as transmission) influence the environment within the operator enclosure.BSISO14269-2:1997 BSI 04-1999 3 8.1.4 Prior to conducting tests on the air-conditioning system, th
44、e machine shall be operated as specified in8.1.3 for one hour, to provide a preliminary, stabilizing heat soak period. Doors and windows shall be closed and other ventilation systems shall be turned off. During this period, ambient temperature shall be as specified in8.1.2. 8.1.5 The air-conditionin
45、g system controls shall be set according to the manufacturers specifications or to provide maximum cooling performance. The requirements specified in clause6 shall be maintained throughout the test. 8.2 Minimum air-conditioning system performance The air conditioning system shall be capable of reduc
46、ing the operator environment temperature to the comfort zone shown inFigure 1, or a minimum of11 C below the ambient for ambient temperatures between38 C and the highest ambient temperature at which the machine is designed to operate. 9 Heating system test 9.1 Test conditions 9.1.1 The heating syste
47、m shall be tested in the intended production configuration, adjusted within the manufacturers specifications. 9.1.2 The ambient conditions for heating tests shall be: a) maximum dry bulb temperature: 7 C; b) maximum air velocity passing the machine from front to rear:5m/s. 9.1.3 The test machine sha
48、ll be cold soaked at the conditions outlined in 9.1.2 for a minimum of 10h prior to start of the test. 9.1.4 The machine shall be operated in accordance with the manufacturers recommended warm-up procedure, then run at rated speed under a maximum load of no more than20% of the maximum rated net engi
49、ne power. Net engine power shall be determined in accordance with ISO2288. 9.1.5 The heating system controls shall be set according to the manufacturers specifications or for maximum heating capacity. The requirements specified in clause6 shall be maintained throughout the test. 9.1.6 If the machine is field tested, no solar heating is allowed on the operator station. 9.2 Minimum heating system performance The heating system shall be capable of increasing the operator environment temperature to the
