GB/T 27698.7-2011
AbolishedTest method for the performance of heat exchangers and heat exchange element-- Part 7：Measurement of noise from air-cooled heat exchangers
热交换器及传热元件性能测试方法 第7部分：空冷器噪声测定
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 术语和定义 → 4 测定的量及其测量误差 → 5 声学测试环境 → 6 测试仪器 → 7 测试方法 → 附录A(规范性附录) 声学测试环境的修正 → 附录B(资料性附录) 单独一跨的噪声测定报告示例 → 附录C(资料性附录) 现场一个单元的噪声测定报告示例 Foreword → 1 Scope → 2 Normative References → 3 Terms and Definitions → 4 Measured Quantities and Measurement Errors → 5 Acoustic Test Environment → 6 Test Instruments → 7 Test Methods → Annex A (Normative) Correction of Acoustic Test Environment → Annex B (Informative) Example of Noise Measurement Report for a Single Bay → Annex C (Informative) Example of Noise Measurement Report for a Unit in the Field
Scope
1.1 Subject content This part of GB/T 27698 specifies the measurement methods for A-weighted sound level, octave band sound pressure level and sound power level of noise from air-cooled heat exchangers. 1.2 Scope of application 1.2.1 This part is applicable to induced-draught air-cooled heat exchangers and forced-draught air-cooled heat exchangers with horizontal tube bundles. The noise measurement methods for sloped-top, wet, dry-wet combined and other types of air-cooled heat exchangers may refer to this part. This part is not applicable to individual noise-generating components (such as impellers, transmission devices and electric motors). 1.2.2 The measurement types specified in this part include two types: a) Factory test: noise measurement of a single bay by the manufacturer before the product leaves the factory; b) Field test: noise measurement of a unit on the site installation.
1.1 主题内容 GB/T 27698的本部分规定了空冷器噪声A声级、倍频程声压级和声功率级的测定方法。 1.2 适用范围 1.2.1 本部分适用于管束水平放置的引风式空冷器、鼓风式空冷器。斜顶式、湿式、干湿联合式及其他型式空冷器的噪声测定方法可参照本部分进行。本部分不适用于产生噪声的单个部件(如叶轮、传动装置和电动机等)。 1.2.2 本部分所规定的测定类型包括两种： a) 出厂测试：即制造厂在产品出厂前对单独一跨的噪声测定； b) 现场测试：即在现场装置上对一个单元的噪声测定。
Normative References
Keywords
Application Summary AI generated
Manufacturers and users of air-cooled heat exchangers use this standard to measure the noise levels emitted by the equipment. Through standardized factory and field tests, the noise performance can be accurately assessed to ensure compliance with environmental and occupational health regulations. This standard is crucial for controlling industrial noise pollution and improving workplace conditions.
空冷器制造商和用户使用该标准来测定空冷器产生的噪声水平。通过标准化的出厂测试和现场测试，可以准确评估空冷器的噪声性能，确保其符合环保和职业健康要求。该标准对于控制工业噪声污染、改善工作环境具有重要意义。
AI Summary AI generated
This standard specifies methods for measuring noise from air-cooled heat exchangers, including A-weighted sound level, octave band sound pressure level, and sound power level. It applies to induced-draught and forced-draught types with horizontal tube bundles, while other types may refer to it. The standard covers both factory tests (single bay) and field tests (unit), detailing test environment requirements, instrument calibration, measurement point layout, background noise correction, and sound power level calculation. Measurement errors are controlled within specified limits to ensure reliable results.
本标准规定了空冷器噪声的测定方法，包括A声级、倍频程声压级和声功率级的测量。适用于管束水平放置的引风式和鼓风式空冷器，其他类型可参照执行。标准涵盖出厂测试和现场测试两种类型，详细规定了测试环境要求、仪器校准、测点布置、背景噪声修正及声功率级计算方法。测量误差控制在规定范围内，确保结果可靠。
Key Sentences extracted from text
GB/T 27698的本部分规定了空冷器噪声A声级、倍频程声压级和声功率级的测定方法。
本部分适用于管束水平放置的引风式空冷器、鼓风式空冷器。
当测点读数值与背景噪声级值之差大于10 dB时，测点读数值不需修正即为测量值。
测量时，传声器应按噪声辐射的方向正对声中心。
对于辐射100 Hz～10 000 Hz频率范围内频谱密度均匀的噪声源，测量A声功率级的标准偏差应为2 dB(A)。
This part of GB/T 27698 specifies the measurement methods for A-weighted sound level, octave band sound pressure level and sound power level of noise from air-cooled heat exchangers.
This part is applicable to induced-draught air-cooled heat exchangers and forced-draught air-cooled heat exchangers with horizontal tube bundles.
When the difference between the reading value at the measurement point and the background noise level value is greater than 10 dB, the reading value at the measurement point does not need correction and is taken as the measured value.
During measurement, the microphone shall face the sound center in the direction of noise radiation.
For a noise source with uniform spectral density in the frequency range of 100 Hz to 10 000 Hz, the standard deviation of the measured A-weighted sound power level shall be 2 dB(A).