ARI 740-1998 Refrigerant Recovery Recycling Equipment Supersedes 740-95《制冷恢复或循环设备.代替ARI 740-95》.pdf

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1、STD-AR1 740-ENGL 1998 I 0352120 0011410 202 aiiia 1998 STANDARD for AIR-CONDITIONING test requirements, rating requirements, minimum data requirements for published ratings, operating requirements, marking and nameplate data; and conformance conditions. It establishes methods of testing for rating a

2、nd evaluating the performance of refrigerant recovery/recycling equipment for contaminant or purity levels, capacity, speed, purge loss to minimize emission into the atmosphere of designated refiigerants and to assure that recycling equipment meets the minimum purity requirements for refrigerants es

3、tablished in the Industry Recycling Guide (IRG-2). 1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. Sec

4、tion 2. Scope 2.1 Scope. This standard applies to equipment for recovering and/or recycling single refrigerants, azeotropes, zeotropic blends, and their normal coniaminants from refrigerant systems. This standard defines the test apparatus, test gas mixtures, sampling procedures and anaiytical techn

5、iques that will be used to determine the performance of refrigerant recovery and/or recycling equipment (hereinafter, “equipment“). 2.1.1 3.3.2. Equipment shall be as defined in 3.3.1 and 2.1.2 Refrigerants used to evaluate equipment shall be pure halogenated hydrocarbons, azeotropes and blends cont

6、aining halogenated hydrocarbons. Section 3. Definitions 3.1 DeJsnitions. All terms in this document will follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning, and Repigeration unless otherwise defined in this section. 3.2 Cle

7、aring Repigerant. Procedures used to remove trapped refrigerant from air conditioning and refrigeration equipment More switching from one refrigerant to another. 3.3 Equipment Classification. 3.3.1 Self-contained Equipment. A refigerant recovery or recycling system which is capable of refrigerant ex

8、traction without the assistance of components contained within an air-conditioning or refiigeration system. 3.3.2 System Dependent Equipment. Refrigerant recovery equipment which requires for its operation the assistance of components contained in an air- conditioning or refrigeration system. 3.4 Hi

9、gh Temperature Vapor Recovery Rate. For equipment having at least one designated refrigerant (see 8.2) with a boiling point in the range of -50 to +lOC, the rate will be measured for R-22, or the lowest boiling point refrigerant ifR-22 is not a designated refrigerant. 3.5 Published Ratings. A statem

10、ent of the assigned values of those performance characteristics, under stated rating conditions, by which a unit may be chosen to fit its application. Theses values apply to all units of like nominai size and type (identifcation) produced by the same manufacturer. As used herein, the term “published

11、 rating“ includes the rating of all performance characteristics shown on the unit or published in specifications, advertising or other literature controlled by the manufacturer, at stated rating conditions. 3.5.1 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.5.2

12、 Application Rating. A rating based on tests performed at Application Rating Conditions (other than Standard Rating Conditions). 3.6 PusWuliMethod The push/pull refrigerant recovery method is defined as the process of transferring liquid refiigemt from a refrigeration system to a receiving vessel by

13、 lowering the pressure in the vessel and raising the pressure in the system, and by connecting a separate line between the system liquid port and the receiving vessel. 3.7 Rating Conditions. Any set of operating conditions under which a singie level of performance resuik, and which causes only that

14、level of performance to occur. 1 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-AR1 740-ENGL 3978 II 0352320 OOLL4L5 874 sl AR1 STANDARD 740-1 998 3.7.1 Standard Ratin

15、g Conditions. Rating conditions used as the basis of comparison of performance characteristics. 3.8 Reclaim. To process used refrigerant to new product specincations. Chemical analysis of the refrigerant shall be required to determine that appropriate specitications are met. The identification of co

16、ntaminants and required chemical analysis shall be specied by reference to national or international standards for new product specications. 3.9 Recover. To remove refrigerant in any condition from a system and store it in an external container. 3.10 Recycle. To reduce contaminants in used refrigera

17、nts by separating oil, removing noncondensables and reducing moisture, acidity and particulate matter to the levels prescribed in Industry Recycling Guide (IRG-2). 3.11 Recycle Equipment. Equipment that recycles and whose type of equipment is “Recovery/Recycle“ or “Recycle. I 3.12 Recycle Flow Rate

18、The amount of refrigerant processed divided by the time elapsed in the recycling mode. For equipment which uses a separate recycling sequence, the recycle rate does not include the recovery rate (or elapsed time). For equipment which does not use a separate recycling sequence, the recycle rate is a

19、rate based solely on the higher of the liquid or vapor recovery rate, by which the contaminant levels were measured. 3.13 Residual Trapped Repigerant. Refrigerant remaining in equipment after clearing. 3.14 “Shall, Ir “Should, I %Recommended“ or !it is Recommended. Ir “Shall,“ “should,“ “recommended

20、“ or “it is recommended“ shall be interpreted as follows: 3.14.1 Shall. Where “shall“ or “shall not“ is used for a provision specrfied, that provision is mandatory if compliance with the standard is claimed. 3.14.2 Should, Recommended or It is Recommended. “Should,“ “recommended“ or “it is recommend

21、ed“ is used to indicate pmvisions which are not mandatory but which are desirable as good practice. 3.15 Standard Contaminated Repigerant Sample. A mixture of new or reclaimed refrigerant and specied quantities of identified contaminants which constitute the mixture to be processed by the equipment

22、under test. These contaminant levels are expected only from severe service conditions. 3.16 Trapped Repigerant. The amount of refrigerant remaining in the equipment after recovery or recovery/rqcling operation before clearing. 3.17 Vapor Recovery Rate. The average rate that recigerant is withdrawn f

23、rom the mixing chamber between two pressures as vapor recovery rate is changing depending on the pressure. (The initial condition is vapor only at Saturation pressure and temperature at either 24C or at the boiling point 100 Wa, whichever is higher. The final pressure condition is 10% of the initial

24、 pressure, but not lower than the equipment final recovery vacuum and not higher than 100 Wa.). Section 4. Test Requirements 4.1 Testing Requirements. Ail standard ratings shall be verified by tests conducted in accordance with the provisions set forth in Appendix C to this standard. 4.1.1 component

25、s as recommended by the manufacturer. Equipment. Equipment shall be tested using all 4.1.2 Electrical Conditions. Tests shall be made at the electrical characteristics specified on the unit nameplate. Section 5. Rating Requirements 5.1 Standmd Rating Conditions. Published Ratings shall include ail o

26、f the standard ratings as shown in Tables 2 and 3, for each refrigerant designated by the manufacturer. The standard contaminated refrigerant sample shall have the characteristics specified in Table 1, except that recovery equipment not rated for any specific contaminant shall be tested with new or

27、reclaimed refrigerant. Testing shall be conducted at an ambient temperature of 24 OC I1 OC except high temperature vapor recovery shall be 40 OC *1 C. For purposes of charactenzed performance, refrigerants have been categorized as shown in Table 4. Representative test refrigerant(s) have been select

28、ed within each category for test and rating purposes as shown in Table 4. Designated individual refrigerants may be selected for testing and rating. Representative test refrigerants other than those designated in the third column of Table 4 may be selected for test purposes to form multiple individu

29、al refiigerants within a chosen category. If the representative test refrigerant is replacing a normaily designated representative test recigerant per Table 4, then the refrigerant with the highest 2 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for

30、 ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-AR1 740-ENGL 1998 0352120 OOL141b 720 AR1 STANDARD 740-1 998 vapor pressure within the category is used as the representative test refrigerant. 5.2 Tolerances. Performance related parameters shall be equai to or better t

31、han the published ratings. Section 6. Minimum Data Requirements for Published Ratings 6.1 Minimum Data Requirements for Published Ratings. Published Ratings shall include ail of the Standard Ratings as shown in Tables 2 and 3 for each refrigerant designated by the manufacturer. Section 7. Operating

32、Requirements 7.1 Equipment Information. The equipment manufacturer shall provide operating instructions, necessary maintenance procedm and source information for replacement parts and repair. 7.2 Filter Replacement for Recycle Equipment. The equipment shall indicate when any filter/drier(s) needs re

33、placement. This requirement can be met by use of a mois- ture transducer and indicator light, by use of a sight glass/moisture indicator or by some measurement of the iimount of r he may not imply compliance with the category requirements. C5.1.4 Hose Assemblies. For the purpose of limiting refriger

34、ant emissions to the atmosphere, hose assemblies shall be tested for permeation according to ANSI/UL Standard 1963, Section 40.10. C5.2 Equipment Preparation and Operation. The equipment shall be prepared and operated per the operating insructions. C5.3 Contaminated RefTigerants. The standard contam

35、inated refrigerant sample shall have the characterisics Specined in Table 1, except as provided in c5.4 C5.4 Recovery-Only Testing. Recovery equipment not rated for any specific contaminant shall be tested with new or reclaimed refrigerant. C5.5 Test Batch. The test batch consisting of refrigerant s

36、ample (see Section C5.3) of the test refrigerant shall be prepared and thoroughly mixed. Continued mixing or stimng shall be required during the test while liquid refrigerant remains in the mixing chamber. The mixing chamber shall be filled to 80% level by volume. C5.5.1 Control Test Batch. Prior to

37、 starting the test for the first batch for each refrigerant, a liquid sample wiii be drawn from the mixing chamber and analyzed per Section C6 to assure that contaminant levels match Table 1 within &IO ppm for moisture, ?C20 ppm for oleic acid and M.5% for oil. C5.6 Recovery Tests (Recovery and Reco

38、verymecycle Equipmenf). C5.6.1 Determining Recovery Rates. The liquid and vapor refiigerant recovery rates shall be measured during the first test batch for each refiigerant (see C7.1, C7.2 and C7.4). Equipment preparation and recovery cylinder changeover shall not be included in elapsed time measur

39、ements for determining vapor recovery rate and liquid refrigerant recovery rate. Operations such as subcooling the recovery cylinder shall be included. Recovery cylinder shall be the same size as normally fiunished by the equipment manufacture. Oversized tanks shall not be permitted. C5.6.1.1 Liquid

40、 Repigerant Recovery Rate. If elected, the recovery rate using the liquid refrigerant feed means (see C4.2.5) shall be determined. After the equipment reaches stabilized conditions of condensing temperature andor recovery cylinder pressure, the recovery process shall be stoppe and an initial weight

41、shall be taken of the mixing chamber (see C7.2). The recovery 13 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD=ARI 740-ENGL 1998 U 0352120 0011427 50b W AR1 STANDARD

42、740-1998 process shall be coninued for a period of time sucient to achieve the accuracy in C7.4. The recovery process shall be stopped and a final weight shall be taken of the mixing chamber. (3.6.1.2 Vapor Repigerant Recovey Rate. If elected, the average vapor flow rate shall be measured to accurac

43、y requirements in clause C7.4 under conditions with no liquid refrigerant in the mixing chamber. The liquid recovery feed means shall be used. At initiai conditions of saturated vapor at the higher of 24C or the boiling temperature (100 Ea), the weight of the mixing chamber and the pressure shall be

44、 recorded. At final conditions representing pressure in the mixing chamber of 10% of the initial condition, but not less than the final recovexy vacuum (see C7.6) nor more than 100 kPa, measure the weight of the mixing chamber and the elapsed time. At initial conditions, the recovery cylinder shall

45、be at saturation pressure at ambient conditions. C5.6.1.3 High Temperature Vapor Recovery Rate. Applicable for equipment having at least one designaed refrigerant (see 8.2) with a boiling point between -50C and +lO“C. Measure the rate for R-22, or the refiigemt with the lowest boiling point if R- 22

46、 is not a designated refrigerant. Repeat the test in C5.6.1.2 at saturated conditions at 40C and continue to operate equipment to assure it will achieve the final recovery vacuum (see C5.6.3). At initial conditions the recovery cylinder shall be at saturated pressure at 4OO.C. C5.6.2 Recovery Operat

47、ion. This test is for determining the final recovery vacuum and the ability to remove contaminants as appropriate. If equipment is rated for liquid recovery (see C5.6.1.3), liquid recovery feed means described in C4.2.5 shall be used ifnot, vapor recoveq means described in C4.2.3 or C4.2.4 shall be

48、used. Continue recovery operation until all liquid is removed from the test apparatus and vapor is removed to the point where equipment shuts down by automatic means or is manually shut off per operating instructions. C5.6.2.1 Oil Draining. Capture oil from the equipment at intervals as required in

49、the instructions. Record the weight of the container. Completely remove refrigerant from oil by evacuation or other appropriate means. The weight difference shall be used in C.5.7.2. C5.6.3 Final Recovery Vacuum. At the end of the first test batch for each refrigerant, the liquid valve and vapor valve of the apparatus shall be closed. After waiting 1 minute, the mixing chamber pressure shall be recorded (see C7.6). C5.6.4 Residual Re9igerant. This test will measure the mass of remaining refrigerant in the equipmen