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22、measuring energy consumption and determining efficiencies of gas-fired and fuel oil-fired water heatersP.3-15P.3-15Testing method for measuring energy consumption and determining efficiencies of gas-fired and fuel oil-fired water heatersDecember 2015 2015 CSA Group 1ContentsTechnical Committee on En
23、ergy Efficiency and Related Performance of Fuel-Burning Appliances and Equipment 3Subcommittee on Gas-Fired Storage Waters Heaters Efficiency 6Preface 81 Scope 102 Reference publications 113 Definitions and symbols 123.1 Definitions 123.2 Symbols 154 Test conditions 184.1 Installation 184.1.1 Genera
24、l requirements 184.1.2 Water heating mounting 184.1.3 Water inlet and outlet configuration 184.2 Vent requirements 194.3 Water temperatures and pressure 204.3.1 General requirements 204.3.2 Outlet water temperature 204.3.3 Set-point temperature 204.4 Energy supply 204.4.1 Electrical supply 204.4.2 G
25、as supply 204.5 Thermocouple installation 214.5.2 Inlet and outlet water temperature measurements 224.5.3 Ambient temperature measurement 224.5.4 Energy-saving device 224.6 Energy consumption measurement 224.6.1 General requirements 224.6.2 Electrical energy consumption 224.6.3 Gas consumption 224.6
26、.4 Fuel oil consumption 224.7 Environment 234.7.1 General requirements 234.7.2 Relative humidity 234.7.3 Air temperature 234.8 Equipment precision and accuracy 234.8.1 General requirements 234.8.2 Temperature difference 234.8.3 Temperature measurement 235 Test procedures and measurements 24P.3-15Tes
27、ting method for measuring energy consumption and determining efficiencies of gas-fired and fuel oil-fired water heatersDecember 2015 2015 CSA Group 25.1 Operational mode selection 245.2 Determination of storage tank volume 245.3 Power input determination 245.4 Setting the tank thermostat and outlet
28、water temperature 255.4.1 Preparing the water heater 255.5 Mean tank temperature measurement 265.6 Soak-in period for water heaters with rated storage volumes greater than or equal to 7.6 L (2.0 US gal) 265.7 Delivery capacity test 275.7.1 Maximum L/min (gpm) rating test for flow activated water hea
29、ters 275.7.2 First hour rating test for non-flow activated storage water heaters 275.8 Twenty-four hour simulated-use test 285.8.1 Selection of draw pattern 285.8.2 Test sequence for water heaters with rated storage volumes greater than or equal to 7.6 L (2.0 US gal) 285.8.3 Standby loss test measur
30、ed between draw clusters 295.8.4 Standby loss test measured after draw clusters 305.8.5 Completion of 24 h simulated-use test 305.8.6 Test sequence for water heaters with rated storage volume less than 7.6 L (2.0 US gal) 306 Calculation of derived results from test measurements 316.1 Water heater de
31、livery capacity classification 316.2 First-hour rating 316.3 Maximum L/min (GPM) rating 326.4 Recovery efficiency 336.5 Hourly standby heat losses 346.6 Daily water heating energy consumption 356.7 Adjusted daily water heating energy consumption 356.8 Uniform energy factor 376.9 Annual energy consum
32、ption 376.10 Annual electrical energy consumption 386.11 Annual fossil fuel energy consumption 386.12 Computations for water heaters with rated storage volume less than 7.6 L (2 US gal) 386.12.1 Recovery efficiency 386.12.2 Daily water heating energy consumption 396.12.3 Uniform energy factor 406.12
33、.4 Annual energy consumption 416.12.5 Annual electrical energy consumption 416.12.6 Annual fossil fuel energy consumption 417 Sampling plan 42Annex A (informative) Density and specific heat of water 61Annex B (informative) Thermocouple position and capacity determination procedure for storage water
34、heater tanks 88Annex C (informative) Canadian summer/winter maximum water flow rates 91Annex D (informative) Rationale for revising the CSA P.3 Performance Standard 92P.3-15Testing method for measuring energy consumption and determining efficiencies of gas-fired and fuel oil-fired water heatersDecem
35、ber 2015 2015 CSA Group 3Technical Committee on Energy Efficiency and Related Performance of Fuel-Burning Appliances and EquipmentJ. Overall Toronto, Ontario Category: General InterestChairM. Thomas Natural Resources Canada CANMET Energy, Ottawa, Ontario Category: General InterestVice-ChairD.F. Brad
36、ley FortisBC Energy Inc. (FEI), Surrey, British Columbia Category: User InterestR.L. Cane Caneta Research Inc. / Caneta Energy, Mississauga, Ontario Category: General InterestR. Cochrane Natural Resources Canada, Ottawa, Ontario Category: Regulatory AuthorityB.G. Diggens MJS Mechanical Ltd., Calgary
37、, Alberta AssociateJ.P. Gamache Ministre des Ressources naturelles, Qubec, Qubec Category: Regulatory AuthorityT. Gottschalk Hearth Patio andb) an update of the outlet water temperature requirement to better reflect conditions encountered in typical field installations.This Standard is considered su
38、itable for use for conformity assessment within the stated scope of the Standard.CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of Natural Resources Canada (NRCan), the Ontario Ministry of Energy (OME), and Efficiency Nova Scotia (EN
39、S).This Standard was prepared by the Subcommittee on Gas-Fired Storage Water Heaters Efficiency, under the jurisdiction of the Technical Committee on Energy Efficiency and Related performance of Fuel- Burning Appliances and Equipment, and will be formally approved by the Technical Committee. It will
40、 be submitted to the Standards Council of Canada for approval as a National Standard of Canada.Notes: 1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.2) Although the intended primary application of this Standard is stated in its Scope, it is important to not
41、e that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization Code of good practice for standardization as “substantial agreement. Consensus
42、 implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.4) To submit a request for interpretation of this Standard
43、, please send the following information to inquiriescsagroup.org and include “Request for interpretation” in the subject line: a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;b) provide an explanation of circumstances surrounding
44、 the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue. Committee interpretations are processed in accordance with the CSA Directives and guidelines P.3-15Testing method for measuring energy consumption and dete
45、rmining efficiencies of gas-fired and fuel oil-fired water heatersDecember 2015 2015 CSA Group 9governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.5) This Standard is subject to review five years from the date of publication and suggest
46、ions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiriescsagroup.org and include “Proposal for change” in the subject line: a) Standard designation (number);b) relevant clause, table, and/or figure num
47、ber;c) wording of the proposed change; andd) rationale for the change.P.3-15Testing method for measuring energy consumption and determining efficiencies of gas-fired and fuel oil-fired water heatersDecember 2015 2015 CSA Group 10P.3-15Testing method for measuring energy consumption and determining e
48、fficiencies of gas-fired and fuel oil-fired water heaters1 Scope1.1 This Standard describes the test procedures required to perform a 24 h simulated-use test. This Standard also provides the calculations required to determine the first-hour rating, maximum flow rate, recovery efficiency, standby los
49、s, daily water heating energy consumption, uniform energy factor, and annual energy consumption for gas-fired and fuel oil-fired water heaters.1.2 This Standard applies to:a) Gas-fired storage water heaters i) with rated storage capacity up to and including 454 L (120 US gal);ii) having rated inputs up to and including 30.77 kW (105 000 Btu/h); andiii) designed to provide outlet hot water at a controlled temperature up to and including 82 C (180F);b) Fuel oil-fired storage water heaters i) with rated storage capacity up to and including 454 L (120 US
