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GB/T 15911-2021 PDF English (GB/T 15911-1995: Older version)


Search result: GB/T 15911-2021 (GB/T 15911-1995 Older version)
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GB/T 15911-2021English145 Add to Cart 0-9 seconds. Auto-delivery. Monitoring and testing method for energy saving of industrial electro heat devices Valid
GB/T 15911-1995English199 Add to Cart 2 days Monitoring and testing method for energy saving of electroheat device in industry Obsolete


GB/T 15911-2021: PDF in English (GBT 15911-2021)

GB/T 15911-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.010 F 01 Replacing GB/T 15911-1995 Monitoring and Testing Method for Energy Saving of Industrial Electroheat Devices ISSUED ON: APRIL 30, 2021 IMPLEMENTED ON: NOVEMBER 01, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of PRC. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 6 4 Monitoring Method for Energy Saving ... 6 5 Calculation of Monitoring for Energy Saving ... 7 6 Qualified Indicators for Monitoring of Energy-Saving ... 9 7 Evaluation for Monitoring Results of Energy-Saving ... 10 Appendix A (Informative) Monitoring Report Format for Industrial Electroheat Device ... 12 Monitoring and Testing Method for Energy Saving of Industrial Electroheat Devices 1 Scope This Standard specifies the monitoring content, monitoring methods and qualified indicators of the energy utilization status of industrial electroheat device. This Standard is applicable to the energy-saving monitoring of industrial electric baking furnaces (boxes), electric drying furnaces (kilns, chambers, boxes) and microwave- type electroheat device with rated power greater than or equal to 8kW and rated operating temperature less than or equal to 1500°C. This Standard is not applicable to the energy-saving monitoring of metal smelting, casting, heat treatment and other industries and mechanical forming processing systems and vacuum electroheat device. 2 Normative References The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this document. GB/T 8222 The Principles for Electricity Balance of Equipment GB/T 10066.1-2019 Test Methods for Electroheating and Electromagnetic Processing Installations - Part 1: General GB/T 10066.4-2004 Test Methods for Electroheat Installations - Part 4: Indirect Resistances Furnaces GB/T 15316 General Principles for Monitoring and Testing of Energy Saving GB 17167 General Principle for Equipping and Managing of the Measuring Instrument of Energy in Organization of Energy Using GB/T 30839.4 Energy Consumption Grading for Industrial Electroheat Installations -Part 4: Indirect Resistance Furnaces conditions. 4.3.5 Monitoring time Electroheat device for continuous production shall start monitoring when the thermal conditions reach normal working conditions; and the monitoring time shall be no less than 3h; the monitoring time of electroheat device for intermittent production shall be no less than 3 production cycles. 4.4 Determination of temperature-rise time 4.4.1 The determination of temperature-rise time shall comply with the relevant provisions of GB/T 10066.4-2004. 4.4.2 The electroheat device for continuous production (such as chains type, and tunnel type, etc.) may be exempted from the determination of temperature-rise time. 4.5 Determination of surface temperature-rise 4.5.1 The temperature measurement points on the outer surface of the electroheat device shall be separately on the outside of the furnace door, any optional 3~5 points on the insulation shell (side wall and top cover); but they shall not be located 120mm away from the furnace mouth (product entrance, heating element and thermocouple lead-out hole, vent hole, etc.) and the fastener penetrating the inner lining. 4.5.2 The measurement of ambient temperature shall comply with the provisions of 5.8 in GB/T 10066.1-2019. 4.5.3 The measurement of surface temperature-rise shall comply with the provisions of 6.17 in GB/T 10066.4-2004. 4.6 Determination of ratio of no-load power loss to rated power The measurement of ratio of no-load power loss to rated power, and the rated power shall be carried out respectively according to 6.11 and 6.8 of GB/T 10066.4-2004. 5 Calculation of Monitoring for Energy Saving 5.1 Calculation of electric energy utilization The electric energy utilization rate shall be calculated according to Formula (1): Where: η – electric energy utilization rate; WG - supply of electric energy, in kW·h; WY - Effective electric energy, in kW·h. The effective electric energy shall be calculated according to Formula (2): Where: m1 - the mass of the product before processing, in kg; m2 - the mass of the product after processing, in kg; t1 - the temperature of the product before processing, in °C; t2 - the maximum working temperature of product heating, in °C; c2 - the average specific heat capacity of the product at t2 - t1, in [kJ/(kg·°C)]; c1 - the average specific heat capacity of the volatile (evaporated) matter in the product at t1 - t2, in [kJ/(kg·°C)]; r - the latent heat of the volatile (evaporated) matter in the product during the phase change, in kJ/kg; c1, c2, r — constants, available by checking related manuals. 5.2 Calculation for ratio of no-load power loss to rated power The ratio of no-load power loss to rated power shall be calculated according to Formula (3): Where: R – ratio of no-load power loss to rated power; P0 – no-load power loss, in kW; Pn – rated power, in kW. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.

Similar standards: GB 16780   GB/T 13469   GB/T 17166   GB/T 15913   

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