|
US$659.00 ยท In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 27698.4-2023: Test methods for the performance of heat exchangers and heat exchange elements - Part 4: Measurement of noise from air-cooled heat exchangers
Status: Valid GB/T 27698.4: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 27698.4-2023 | English | 659 |
Add to Cart
|
6 days [Need to translate]
|
Test methods for the performance of heat exchangers and heat exchange elements - Part 4: Measurement of noise from air-cooled heat exchangers
| Valid |
GB/T 27698.4-2023
|
| GB/T 27698.4-2011 | English | 239 |
Add to Cart
|
2 days [Need to translate]
|
Test method for the performance of heat exchangers and heat exchange element -- Part 4: Spiral heat exchanger
| Obsolete |
GB/T 27698.4-2011
|
PDF similar to GB/T 27698.4-2023
Basic data | Standard ID | GB/T 27698.4-2023 (GB/T27698.4-2023) | | Description (Translated English) | Test methods for the performance of heat exchangers and heat exchange elements - Part 4: Measurement of noise from air-cooled heat exchangers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J75 | | Classification of International Standard | 27.060.30 | | Word Count Estimation | 32,330 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-05-23 | | Older Standard (superseded by this standard) | GB/T 27698.7-2011 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 27698.4-2023: Test methods for the performance of heat exchangers and heat exchange elements - Part 4: Measurement of noise from air-cooled heat exchangers
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 27:060:30
CCSJ75
National Standards of People's Republic of China
Replace GB/T 27698:7-2011
Performance test method of heat exchanger and heat transfer element
Part 4: Noise determination of air coolers
Released on 2023-05-23
2023-05-23 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface I
Introduction II
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 symbols 2
5 Measurement parameters and standard uncertainties 4
5:1 Measurement parameters 4
5:2 Standard uncertainty4
6 Acoustic test environment 5
6:1 Basic requirements 5
6:2 Background noise correction 5
6:3 Test Environment Amendment 5
7 Test equipment 6
7:1 Basic requirements 6
7:2 Calibration 6
8 Test method 6
8:1 Measurement method of noise of single span (factory test) 6
8:2 Noise measurement method of a unit on site (field test) 11
9 Measurement report 14
Appendix A (Normative) Determination of Correction Factors for Acoustic Test Environment 15
Appendix B (informative) Example of noise measurement report for a single span16
Appendix C (informative) Example of noise measurement report of a unit on site 22
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document is part 4 of GB/T 27698 "Test Methods for Performance of Heat Exchangers and Heat Transfer Elements": GB/T 27698 has been issued
the following sections:
--- Part 1: General requirements;
--- Part 2: Heat exchangers;
--- Part 3: Heat transfer elements;
--- Part 4: Determination of air cooler noise:
This document replaces GB/T 27698:7-2011 "Test methods for performance of heat exchangers and heat transfer elements - Part 7: Noise measurement of air coolers
Certainly": Compared with GB/T 27698:7-2011, except for structural adjustment and editorial changes, the main technical changes are as follows:
a) The terms and definitions of "background noise", "background noise correction", "environmental correction" and "power correction" have been added (see Chapter 3);
b) Added symbols (see Chapter 4);
c) Changed the background noise correction method (see 6:2, 5:2 of GB/T 27698:7-2011);
d) Increased fan power correction factor K3 (see 6:3);
e) Changed the requirements for special measuring points at specified locations (see 8:1:3:3, 8:2:3:2, 7:1:3:3 of GB/T 27698:7-2011,
7:2:3:2);
f) Added fan power correction when calculating sound power (see 8:1:5:6 and 8:2:5:1):
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by the National Standardization Technical Committee of Boilers and Pressure Vessels (SAC/TC262):
This document is drafted by: Shanghai Lanbin Petrochemical Equipment Co:, Ltd:, Gansu Lanke Petrochemical High-tech Equipment Co:, Ltd:, Sinopec
Chemical Engineering Construction Co:, Ltd:, Baoding Hangji Fan Manufacturing Co:, Ltd:, Shanghai Lanhai Technology Innovation Testing Co:, Ltd:, Harbin Air Conditioning Co:, Ltd:
Company, Hubei Changjiang Petrochemical Equipment Co:, Ltd:, Shanghai Customs Industrial Products and Raw Materials Testing Technology Center, Machinery Industry Lanzhou Petrochemical Equipment
Equipment Testing Institute Co:, Ltd:
The main drafters of this document: Jiang Chen, Han Zhuo, Zhou Feng, Zhang Yingkai, Yu Yanwen, Yin Jiying, Zhao Tianbo, Zhang Xiangnan, Chen Zhanyang, Bi Guosheng,
Gao Liping, Zhan Xuefeng, Cao Jinjun, Zhou Wenxue, Zhang Yanfeng:
The previous versions of the documents replaced by this document are as follows:
---GB/T 27698:7, first released in:2011:
Introduction
Performance testing is the most accurate method of determining the flow and heat transfer characteristics of heat exchangers and heat transfer elements: In order to ensure that the performance test is carried out in an orderly manner
GB/T 27698 aims to establish the test system, test conditions and data processing generally applicable to the performance test of heat exchangers and heat transfer elements:
The method and test report requirements are proposed to be composed of 4 parts:
--- Part 1: General requirements: The purpose is to establish a test system and test system suitable for performance testing of various heat exchangers and heat transfer elements:
General requirements for measuring instruments, measuring methods, data processing methods and test reports:
--- Part 2: Heat exchangers: The purpose is to establish product parameter information, test procedures,
Data processing results and test report requirements:
--- Part 3: Heat transfer elements: The purpose is to establish the steam-gas condensation test methods and products for performance testing of various typical heat transfer elements
Parameter information, test procedures, data processing results and test report requirements:
--- Part 4: Determination of air cooler noise: The purpose is to establish the measurement parameters, test environment, test instruments,
Requirements for test methods and measurement reports:
Since it is impossible and unnecessary for GB/T 27698 to include all the technical details of performance testing of heat exchangers and heat transfer elements, therefore,
Under the premise of meeting the accuracy requirements, there are no restrictions on the technical content not specifically mentioned in this document:
GB/T 27698 does not restrict the use of advanced testing techniques and methods in performance testing, but engineers and technicians use advanced techniques
When using technical methods, it is appropriate to make reliable judgments about their scientificity and accuracy:
Performance test method of heat exchanger and heat transfer element
Part 4: Noise determination of air coolers
1 Scope
This document describes the measurement parameters, test environment, test instruments, test methods and test methods for noise determination of air coolers (air-cooled heat exchangers):
set reporting requirements:
This document is applicable to the outlet of induced draft air coolers and blast air coolers of dry type, wet type and wet-dry mixed type with horizontal or inclined tube bundles:
Noise measurement in factory or on site:
Note 1: The noise measurement at the factory refers to the noise measurement of a single span by the manufacturer before the product leaves the factory:
Note 2: On-site noise measurement refers to the noise measurement of a unit on the installation site device:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 3102:7 Acoustic quantities and units
GB/T 3241 Electroacoustic octave and fractional octave filters
GB/T 3767-2016 Acoustic sound pressure method Determination of sound power level of noise source and sound energy level Approximate free field above the reflecting surface
Process method
GB/T 3785:1 Electroacoustic sound level meters Part 1: Specifications
GB/T 4129 Acoustics Performance and Calibration Requirements for Standard Sound Sources for Sound Power Level Determination
GB/T 27698:1 Performance test methods for heat exchangers and heat transfer elements Part 1: General requirements
JJG176 Verification Regulations for Acoustic Calibrator
JJG188 Verification Regulations for Sound Level Meter
NB/T 47007 Air-cooled heat exchanger
3 Terms and Definitions
GB/T 3102:7, GB/T 27698:1, NB/T 47007 and the following terms and definitions apply to this document:
3:1
cross bay
It consists of one or more tube bundles, equipped with one or more fans, and also includes a frame, bellows and other accessories:
3:2
unit unit
A bundle of one or more tubes for a single purpose:
3:3
induced-draughtexchanger
The tube bundle is placed on the air cooler on the suction side of the fan:
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 27698.4-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 27698.4-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 27698.4-2023_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 27698.4-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. Question 5: Should I purchase the latest version GB/T 27698.4-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 27698.4-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.
|