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1、BRITISH STANDARD BS 1586:1982 Methods for Performance testing and presentation of performance data for refrigerant condensing units UDC 621.57.044.004.1 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1586:1982 This British Standard, havi
2、ng been prepared under the direction of the Refrigeration, Heating and Air Conditioning Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31August 1982 BSI 08-1999 First published October 1949 First revision February 1964 Second revision August 1982
3、The following BSI references relate to the work on this standard: Committee reference RHE/4 Draft for comment 81/74335 ISBN 0 580 12875 X Cooperating organizations The Refrigeration, Heating and Air Conditioning Standards Committee, under whose direction this British Standard was prepared, consists
4、of representatives from the following: Association of Manufacturers of Domestic Electrical Appliances Association of Consulting Engineers Boiler and Radiator Manufacturers Association Limited British Combustion Equipment Manufacturers Association British Gas Corporation British Refrigeration and Air
5、 Conditioning Association* Building Services Research and Information Association Chartered Institution of Building Services* Department of Energy (Energy Technology) Department of Health and Social Security Department of the Environment (PSA) Electricity Supply Industry in England and Wales Heating
6、 and Ventilating Contractors Association Hevac Association Institute of Energy Institute of Refrigeration* Institution of Gas Engineers Lloyds Register of Shipping Manufacturers Association of Radiators and Convectors Ltd. Ministry of Defence National Coal Board Society of British Gas Industries Wat
7、er-tube Boilermakers Association The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: Institution of Mechanical Engineers National Federation of Meat Tra
8、ders Associations (inc) Polytechnic of the South Bank Process Plant Association Rotating Electrical Machines Association (BEAMA) Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BS
9、I BS 1586:1982 BSI 08-1999i Contents Page Cooperating organizationsInside front cover Forewordii Section 1. General 1Scope1 2Definitions1 Section 2. Methods of test 3Tests for refrigerating capacity1 4Principal and confirming tests1 5General test conditions1 6Test period2 7Basis of calculations2 8Te
10、st report3 Section 3. Presentation of performance data 9General principles3 10Performance data3 11Correction factors4 12Part load performance4 13Other information and data to be presented4 14Example4 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:
11、21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1586:1982 ii BSI 08-1999 Foreword This British Standard which was prepared under the direction of the Refrigeration, Heating and Air Conditioning Standards Committee was first published in 1949 and revised in 1964. This second revision of this stan
12、dard supersedes BS 1586:1964, which is withdrawn. In this edition, the text has been arranged to follow so far as possible the arrangement of BS 3122-1 and BS 3122-2. Rating conditions for refrigerant compressors are given in publications of other organizations such as CECOMAF1). It is considered th
13、at because of the many varying conditions of use found in practice there is a need for users to be able to compare the performance data at any particular operating conditions of different refrigerant compressors. The standard therefore specifies the items of performance data to be given and their ma
14、nner of presentation so that such comparison may be made. The Technical Committee also recognizes that it is often the practice to present performance data using a suction temperature of 32 C. However, because this practice assumes that the superheat conditions corresponding to 32 C are obtained use
15、fully (which seldom occurs in practice), it is considered that a preferable superheat condition (for the presentation of performance data) is given by 10 K superheat, as was done in BS 3122-2. The standard is complementary to BS 1608 which is currently under revision by the Technical Committee. A Br
16、itish Standard does not purport to include all 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 fr
17、ont cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover 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. 1) European Committee of Manuf
18、acturers of Refrigeration Equipment. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1586:1982 BSI 08-19991 Section 1. General 1 Scope This standard is only applicable to condensing units, both air cooled and water cooled, employing singl
19、e stage refrigerant compressors of the positive volume displacement type including hermetic, semi-hermetic and open types. The methods of test are basically the same as those described in BS 3122-1:1977. This standard also describes the method for the presentation of performance data for refrigerant
20、 condensing units, including correction factors and part load characteristics where applicable. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this standard the following definitions apply. 2.1 condensing unit a
21、machine specifically designed to condense a refrigerant vapour by compressing the vapour and rejecting heat to a cooling medium. This unit usually consists of one or more motor driven compressors, condensers, liquid receivers (when required) and ancillary equipment, all assembled on a common base 2.
22、2 capacity the refrigerating capacity obtained by multiplying the mass flow rate by the difference between the specific enthalpy of the liquid refrigerant leaving the condensing unit and the specific enthalpy of the refrigerant vapour entering the condensing unit (see 10.3) 2.3 power input the total
23、 electrical input for the condensing unit motor and all necessary accessories, including fan motors when used at the rated refrigerating capacity 2.4 performance factor ratio of refrigerating capacity to power input (both in the same units of measurement) 2.5 cooling water consumption the total amou
24、nt of water required for all cooling purposes at the rated refrigerating capacity 2.6 total starting current (locked rotor amps, LRA) the current taken by the condensing unit at the nominal voltage with the compressor rotor locked and the fan motor(s) locked 2.7 total maximum run current (maximum ru
25、n amps, MRA) the total maximum current taken by the condensing unit at the nominal voltage at maximum load conditions for the compressor motor and fan motor(s) 2.8 condenser capacity rating the amount of heat rejected by the condenser per unit of time Section 2. Methods of test 3 Tests for refrigera
26、ting capacity The tests shall comprise a principal test and a confirming test (see BS 3122-1:1977) which shall be carried out simultaneously. The results of the principal test shall be accepted if those of the confirming test are in agreement to within 4 %. 4 Principal and confirming tests The follo
27、wing test methods A to G described in BS 3122-1:1977 shall be used. The general test conditions shall be as given in clause 5. Method A. Secondary fluid calorimeter. Method B. Flooded system refrigerant calorimeter. Method C. Dry system refrigerant calorimeter. Method D. Refrigerant vapour flowmeter
28、. Method E. Refrigerant liquid quantity. Method F. Refrigerant liquid quantity and flowmeter. Method G. Water-cooled condenser. The principal and confirming tests shall be used in the combinations described in clause 7 of BS 3122-1:1977. 5 General test conditions 5.1 The types and calibration of mea
29、suring instruments and accuracy of measurement for the tests shall be as described in Appendix A of BS 3122-1:1977. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1586:1982 2 BSI 08-1999 5.2 The condensing unit shall be tested in a space
30、 which is maintained at the selected ambient temperature, and shall be connected to apparatus for a principal and a confirming test, as specified in clauses 3 and 4. 5.3 The system shall be correctly charged with oil and refrigerant. 5.4 No refrigerant shall be added during the test, and no oil shal
31、l be added to enclosed crankcases which communicate with the refrigerant circuit. During the whole of the test run, the circuit shall contain only the refrigerant and the lubricating oil in such conditions of purity that normal operation in the continuous running of the compressor will be assured. 5
32、.5 The condensing unit shall be operated at the voltage and frequency selected for the test, which shall be regulated to within 2 %. 5.6 For air cooled condensing units the following shall apply. a) The temperature of the air flowing to the condensing units shall be taken as the average reading of a
33、t least four temperature measuring instruments so located as to indicate the average air temperature. Each temperature measuring instrument shall be protected against radiant energy so that true dry bulb temperature is recorded. The temperature of the air flowing to the condensing unit shall be adju
34、sted to within 0.5 C of that specified. b) The ambient temperature shall be taken as the average temperature of the air flowing to the condensing unit. 5.7 For water cooled condensing units the following shall apply. a) The temperature of the inlet water flowing to the condensing unit shall be adjus
35、ted to the selected value 0.3 C. The water rate is adjusted to give the selected outlet temperature within 0.3 C or the water rate is adjusted to give the selected rate within 2 %. If an automatic water valve is incorporated, it shall not be in circuit during the test. b) The ambient temperature at
36、the condensing unit shall be taken as the average reading of two temperature measuring instruments placed in the vicinity of the condensing unit. No abnormal air flow shall be created over the condensing unit. Supplementary compressor cooling means, if incorporated in the condensing unit, shall be u
37、sed as appropriate to the specified rating conditions. 5.8 The following adjustments shall be made. a) Suction absolute pressure shall be within 1 % of the values corresponding to the temperature of saturation at the selected test conditions. b) Suction temperature shall be within 3 C of the suction
38、 vapour temperature at the selected test conditions. 5.9 The following shall be determined. a) The pressure of the refrigerant vapour entering the condensing unit shall be measured at a point at least 300 mm but not less than 8 pipe diameters of a straight run of pipe line upstream of the condensing
39、 unit suction inlet. b) The temperature of vapour entering the condensing unit shall be measured at the point specified in 5.9 a) for the measurement of inlet pressure. c) The temperature of the refrigerant liquid shall be measured at the point where it leaves the condensing unit. 6 Test period The
40、condensing unit shall be operated until steady conditions are established after which readings shall be taken at successive intervals of 20 min until, for a period of 2 h, they lie within the limits specified in clause 5. The middle interval of 1 h within this 2 h period shall be taken as the test p
41、eriod. 7 Basis of calculations 7.1 General. Physical and thermodynamic properties of refrigerants and other materials used in the tests shall be taken from recognized tables and charts. 7.2 Determination of values 7.2.1 Values of density, specific volume and specific enthalpy of the refrigerant shal
42、l be determined from the averages of the individual readings of temperature and pressure at the stated intervals of time during the test period. 7.2.2 Difference of temperature shall be determined as the average of the differences between readings of temperature at the stated intervals during the te
43、st period. 7.2.3 Fluid flow shall be determined from instantaneous readings taken at the stated intervals of time, and the value used shall be the average of these determinations during the test period. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:21:28 GMT+00:00 2006, Uncontrolled Copy
44、, (c) BSI BS 1586:1982 BSI 08-19993 7.2.4 Electrical power input shall be taken as either the average of instantaneous measurements of power at the stated time intervals during the test period or the total energy input during the test period (as measured by an integrating instrument) divided by the
45、duration of the test. 8 Test report 8.1 General. The test report shall include the information, itemized in 8.2 to 8.5, as appropriate to the type of machine. 8.2 General information as supplied by manufacturer. The following information as supplied by the manufacturer shall be included in the test
46、report. a) Condensing unit manufacturers name and the model designation. b) Motor nameplate details. c) Compressor rated speed. d) Designation of the refrigerant (see BS 4580). e) List of normally supplied condensing unit ancillaries and whether or not fitted during the test. f) Details of drive. 8.
47、3 Methods of test used (see clause 4). Details of the principal and confirming test methods used shall be included in the test report. a) Principal method used. b) Confirming method used. 8.4 Test data and average measurements. The following data shall be included in the test report. a) Test number.
48、 b) Date of test. c) Pressure of the refrigerant entering the condensing unit suction, as required in 5.9 a). d) Temperature of the refrigerant vapour entering the condensing unit suction, as required in 5.9 b). e) Pressure of the liquid refrigerant at the condensing unit outlet. f) Temperature of l
49、iquid refrigerant leaving the condensing unit, as required in 5.9 c). g) Ambient temperature at the condensing unit, as required in 5.6 b) and 5.7 b). h) Temperature of cooling water entering the condensing unit, as required in 5.7 a). i) Temperature of cooling water leaving the condensing unit, as required in 5.7 a). j) Temperature of air flowing to the condensing unit. k) Mass flow rate of cooling water. l) Pressure of cooling water entering the condensing unit. m) Pressure of cooling water leaving the condensing unit. n) Revolutions per minute of th