AHRI 1330-2014 Performance Rating for Radiant Output of Gas Fired Infrared Heaters.pdf

1、 2014 Standard for Performance Rating for Radiant Output of Gas Fired Infrared Heaters AHRI Standard 1330 Price $10.00 (M) $20.00 (NM) Copyright 2014, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office IMPORTANT SAFETY DIS

2、CLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, tested, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, constructed, assembled, inst

3、alled and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. AHRI does not certify

4、 or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This is a new standard. TABLE OF CONTENTS SECTION PAGE Section 1. Purpose 1 Section 2. Scope . 1 Section 3. Definitions . 1 Section 4. Test Requirements . 3 Section 5. Rating Requirem

5、ents 3 Section 6. Nomenclature . 4 Section 7. Minimum Data Requirements for Published Ratings 5 Section 8. Marking and Nameplate Data 5 Section 9. Conformance Conditions . 5 TABLES Table 1. Rating Requirements 4 Table 2. Nomenclature . 4 FIGURES Figure 1. Measuring Grid . 2 Figure 2. Radiation Refer

6、ence Plane 3 APPENDICES Appendix A. References Normative . 6 Appendix B. References Informative . 6 Appendix C. Method of Testing for Rating Infrared Heaters Normative . 7 Appendix D. Radiometer Source Normative 14 Appendix E. Radiometer Design Features Informative . 15 Appendix F. Radiant Heat Outp

7、ut Data - Informative 18 TABLES Table C1. Equipment Precision and Accuracy Requirements . 9 Table C2. Fuel Values. . 10 Table E1. Example of Measured Output During Calibration 17 FIGURES Figure C1. Radiation Reference Plane and Measuring Plane of a Horizontally Mounted High Intensity Infrared Heater

8、 . 8 Figure C2. Radiation Reference Plane and Measuring Plane of an Angle Mounted High Intensity Infrared Heater. 8 Figure C3. Measuring Plane of a Horizontally Mounted Low Intensity Infrared Heater 8 Figure C4. Measuring Plane of an Angle Mounted Low Intensity Infrared Heater . 8 Figure E1. Radiome

9、ter Design 15 Figure E2. Determination of the Calibration Factor 17 _AHRI STANDARD 1330-2014 1 PERFORMANCE RATING STANDARD FOR RADIANT OUTPUT OF GAS FIRED INFRARED HEATERS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for infrared heaters: definitions; test requirement

10、s; rating requirements; nomenclature; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions. 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

11、 and Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to Infrared Heaters that are Gas-Fired High-Intensity Infrared Heaters and Gas-Fired Low-Intensity Infrared Heaters with inputs up to and including 117.5 kW per

12、burner intended for installation in and heating of outdoor or indoor spaces. 2.1.1 Exclusions. This standard does not apply to heaters that do not radiate their energy into a single measuring plane. Section 3. Definitions All terms in this document will follow the standard industry definitions in th

13、e ASHRAE Terminology website (https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology) unless otherwise defined in this section. 3.1 Calibration Factor. The results of the calibration provided by an ISO 17025 accredited testing/calibration laboratory in the form of a calibrati

14、on factor consisting of a constant (a) and offset (b). 3.2 Gross Radiant Coefficient. Heat emitted by the appliance through the radiation reference plane divided by the gross heat input of the test gas. 3.3 Infrared Factor. A performance rating factor based on the gross radiant coefficient. Refer to

15、 Table 1. 3.4 Infrared Heater. A heater which directs a substantial amount of its energy output in the form of infrared energy into the area to be heated. Such heaters may be of either the vented or unvented type. The following are types of infrared heaters. 3.4.1 High-intensity Infrared Heater. An

16、infrared heater which has a radiating surface that typically operates at or above 732.0oC. 3.4.2 Low-intensity Infrared Heater. An infrared heater which has a radiating surface that typically operates at temperature less than 732.0oC. 3.4.2.1 Radiant Tube Infrared Heater. Typically, a low intensity

17、infrared heater in which combustion takes place within a tube or conduit. AHRI STANDARD 1330-2014_ 2 3.5 Measuring Cell. A measuring cell is defined as the area contained by four (4) adjacent nodal points of a measuring grid. 3.6 Measuring Plane. A plane parallel and below the radiation reference pl

18、ane. 3.7 Measuring Grid. Regular arrangement in the measuring plane of straight lines running parallel and perpendicular to the longitudinal axis of the appliance. Figure 1. Measuring Grid 3.8 Minimum Angle. The minimum installation angle specified by the manufacturer. The minimum angle is measured

19、from the horizontal plane. 3.9 Nodal Point/Node. A nodal point or node is the intersection of the perpendicular and parallel grid lines on the measuring plane, where an individual measurement is recorded. Four (4) adjacent nodal points confine a measuring cell. 3.10 Published Rating. A statement of

20、the assigned values of those performance characteristics, under stated Rating Conditions, by which a unit may be chosen to fit its application. These values apply to the model tested and identical models produced by the same manufacturer under different model numbers. The term Published Rating inclu

21、des 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. 3.10.1 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.11 Radiation Ref

22、erence Plane. Flat surface bounded by the lower edge of the reflector or, in the case where radiant parts project below this lower edge of the reflector, the flat surface touching the lowest radiant part (refer to Figure 2). 3.12 Rating Conditions. Any set of operating conditions under which a singl

23、e level of performance results. (m,k) _AHRI STANDARD 1330-2014 3 Figure 2. Radiation Reference Plane 3.12.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. 3.13 “Shall“ or “Should“. “Shall“ or “should“ shall be interpreted as follows: 3.

24、13.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.13.2 Should. “Should” is used to indicate provisions which are not mandatory but which are desirable as good practice. Section 4. Test Requirements 4.

25、1 Test Requirements. Published Ratings shall be verified by tests conducted in accordance with the test method described in Appendix C and in accordance with the rating requirements of Section 5. Section 5. Rating Requirements 5.1 Rating Requirements. The Infrared Factor shall be established by usin

26、g Table 1. 5.2 Standard Ratings. Standard Ratings shall be established at the operating conditions specified in Section C4. All Standard Ratings shall be verified by tests in accordance with Appendix C. 5.3 Tolerances. If the Gross Radiant Coefficient falls within 0.005 of the ranges shown in Table

27、1, the rating shall be determined by the average of 3 sequential tests or by selecting the next lower Infrared Factor. The published rating shall not exceed the Infrared Factor calculated in accordance with Appendix C. Reference Plane Reference Plane AHRI STANDARD 1330-2014_ 4 Table 1. Rating Requir

28、ements Gross Radiant Coefficient Infrared Factor (IF) .35 7 .35 .40 8 .40 .45 9 .45 .50 10 .50 .55 11 .55 .60 12 .60 .65 13 .65 .7 14 0.7 15 Section 6. Nomenclature Table 2. Nomenclature Symbol Title Unit a Constant 2Coefficient in equation for 2() kPa-1m -12Coefficient in equation for 2()kPa-1m -12

29、Absorption factor of carbon dioxide 2Absorption factor of water vapor ATOT Total Radiant correction factor for water vapor and CO2in air Partial pressure factor b Signal offset 2Coefficient in equation for 2() kPa-1m-1C -12Coefficient in equation for 2()kPa-1m-1C -1D Thickness of Radiation Gas Layer

30、. m Eif Average irradiance over the measuring cell kW/m2FifArea of measuring cell m2HsGross calorific value of the test gas (at 15 C, 1013.25 mbar, dry gas) kWh/m32Coefficient in equation for emission factor of carbon dioxide kPa-1m -12Coefficient in equation for emission factor of water vapor kPa-1

31、m -1L Length of the radiating surface of the heater m n Coefficient in equations for 2and 2 2Partial pressure of carbon dioxide in ambient air kPa 2Partial pressure of water vapor in ambient air kPa p Gas supply pressure mbar paAtmospheric pressure mbar QmMeasured heat input based on the net calorif

32、ic value of the test gas W Q(R)CRadiant output after correction for absorption of radiation in air W Q(R)MRadiant output W _AHRI STANDARD 1330-2014 5 Table 2. Nomenclature (continued) R Minimum distance between the radiometer and the radiation reference plane m RfRadiant factor Relative humidity % t

33、aAverage ambient air temperature C tgGas temperature at measuring point C U Sensor voltage V UifAverage sensor voltage V UijAverage sensor voltage V V Gas volume input at test conditions m3/h VoGas volume rate under reference conditions (at 15 C, 1013.25 mbar, dry gas) m3/h y Radiant intensity /2Sec

34、tion 7. Minimum Data Requirements for Published Ratings 7.1 Minimum Data Requirements for Published Ratings. As a minimum, Published Ratings shall include all Standard Ratings. All claims to ratings within the scope of this standard shall include the statement “Rated in accordance with AHRI Standard

35、 1330”. All claims to ratings outside the scope of this standard shall include the statement “Outside the scope of AHRI Standard 1330”. Wherever Application Ratings are published or printed, they shall include a statement of the conditions at which the ratings apply. The following shall be reported

36、for each appropriate model(s): 7.1.1 Model Number 7.1.2 Heat Input, kW 7.1.3 Length of Heat Exchanger Tube including length of U-bends and elbows measured through the center-line (Radiant Tube Infrared Heaters only), m 7.1.4 Infrared Factor 7.1.5 Minimum angle shall be specified if it is not tested

37、in a horizontal position, Deg Section 8. Marking and Nameplate Data 8.1 Marking and Nameplate Data. As a minimum, the appliance shall display the manufacturers name, model number, IR factor, heat input, and minimum angle. This information may be provided on multiple markings, if required. 8.1.1 Radi

38、ant Tube Infrared Heaters. For Radiant Tube Infrared Heaters, the appliance shall also display the configuration (straight or U-tube), and heat exchanger length. Section 9. Conformance Conditions 9.1 Conformance. While conformance with this standard is voluntary, conformance shall not be claimed or

39、implied for products or equipment within the standards Purpose (Section 1) and Scope (Section 2) unless such product claims meet all of the requirements of the standard and all of the testing and rating requirements are measured and reported in complete compliance with the standard. Any product that

40、 has not met all the requirements of the standard shall not reference, state, or acknowledge the standard in any written, oral, or electronic communication. AHRI STANDARD 1330-2014_ 6 APPENDIX A. REFERENCES NORMATIVE A1 Listed here are all standards, handbooks, and other publications essential to th

41、e formation and implementation of the standard. All references in this appendix are considered as part of this standard. A1.1 ASHRAE Terminology, https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology, 2014, American Society of Heating, Refrigerating and Air-Conditioning Engi

42、neers, Inc., 1791 Tullie Circle, N.E., Atlanta, GA 30329, U.S.A. A1.2 BS EN 416-2:2006, Single burner gas-fired overhead radiant tube heaters for non-domestic use, 2006, European Committee for Standardization, Rue De Stassart 36 B-1050 Brussels, Belgium. A1.3 BS EN 419-2:2006, Non-domestic gas-fired

43、 overhead luminous radiant heaters Rational use of energy, 2006, European Committee for Standardization, Rue De Stassart 36 B-1050 Brussels, Belgium. A1.4 ISO 17025:2005, General requirements for the competence of testing and calibration laboratories, 2005, International Organization for Standardiza

44、tion, Case Postale 56, CH-1211, Geneva 21 Switzerland. APPENDIX B. REFERENCES INFORMATIVE B1 Listed here are standards, handbooks and other publications which may provide useful information and background but are not considered essential. References in this appendix are not considered part of the st

45、andard. None. _AHRI STANDARD 1330-2014 7 APPENDIX C. METHODS OF TESTING FOR RATING INFRARED HEATERS NORMATIVE C1 Purpose. The purpose of this appendix is to provide a method of testing for Infrared Heaters. C2 Scope. Refer to Section 2 of the standard. C3 Test Equipment. C3.1 Radiometer Equipment. T

46、he radiometer equipment obtained from the manufacturer listed in Appendix D, Section D1 shall be used to measure the irradiance from the infrared heater. Note: Additional information on radiometer equipment may be obtained from Appendix E. C3.1.1 Chopper Frequency. The chopper frequency, with which

47、the chopper wheel interrupts the reception of the radiation, shall be adjusted to match the calibration frequency of the radiometer. It shall remain constant during the test. The chopper frequency shall avoid the same frequency as the electrical supply frequency to the data acquisition equipment, for example, 50Hz or 60Hz. C3.1.2 Radiometer Insulation. A round radiation shield of insulating material with an outer diameter of 300 mm shall be placed flush to the head of the radiometer. The radiation shield shall be a minimum of 5 mm thick with a thermal conductivity 0.05 W/m-K. C3.1.2 R