GB/T 25127.1-2020 PDF English
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Low ambient temperature air source heat pump(water chilling) packages - Part 1: Heat pump(water chilling) packages for industrial and commercial and similar application
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| GB/T 25127.1-2010 | English | 160 |
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Low ambient temperature air source heat pump (water chilling) packages -- Part 1: Heat pump (water chilling) packages for industrial and commercial and similar application
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GB/T 25127.1-2020: Low ambient temperature air source heat pump(water chilling) packages - Part 1: Heat pump(water chilling) packages for industrial and commercial and similar application
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25127.1-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
Replacing GB/T 25127.1-2010
Low ambient temperature air source heat pump (water
chilling) packages - Part 1.Heat pump (water chilling)
packages for industrial & commercial and similar
application
Issued on. JUNE 02, 2020
Implemented on. APRIL 01, 2021
Issued by. Ministry of Ecological Environment;
State Administration for Market Regulation.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Type and basic parameters... 8
5 Technical requirements... 9
6 Test methods... 15
7 Inspection rules... 23
8 Marking, packaging, transportation, storage... 25
Appendix A (Normative) Requirements for heating performance test of low ambient
temperature air source heat pump (chilling water) package... 28
Appendix B (Normative) Test and calculation method for seasonal energy consumption
of low ambient temperature air source heat pump (chilling water) package... 36
Appendix C (Normative) Noise test method for low ambient temperature air source heat
pump (chilling water) package... 55
1 Scope
This Part of GB/T 25127 specifies the type and basic parameters, technical
requirements, test methods, inspection rules, marking, packaging, transportation,
storage of low ambient temperature air source heat pump (chilling water) packages
(hereinafter referred to as "packages"), which are driven by motors for industrial or
commercial and similar applications.
This Part is applicable to packages with a nominal heating capacity greater than 35 kW,
using air as the heating (chilling) source, capable of producing hot (cold) water at an
ambient temperature not lower than -25 °C. Other similar packages may refer to this
for implementation.
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 standard.
GB/T 2423.17 Environmental testing for electric and electronic products - Part 2.
Test method - Test Ka. Salt mist
GB 2894-2008 Safety signs and guideline for the use
GB/T 3785 (all parts) Electroacoustics - Sound level meters
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB 4706.32-2012 Safety of household and similar electrical appliances - Part 32.
Particular requirements for electrical heat pumps, air-conditioners and
dehumidifiers
GB/T 5226.1-2019 Electrical safety of machinery - Electrical equipment of
machines - Part 1.General requirements
GB/T 9237 Refrigerating systems and heat pumps - Safety and environmental
requirements
GB/T 10870-2014 The methods of performance test for water chilling (heat pump)
packages using the vapor compression cycle
3 Terms and definitions
The terms and definitions defined in JB/T 7249, as well as the following terms and
definitions, apply to this document.
3.1 Low ambient temperature air source heat pump (water chilling) packages
A package which uses air as the heat (cold) source and using a vapor compression
refrigeration cycle driven by an electric motor, to produce hot (cold) water at an
ambient temperature not lower than -25 °C.
3.2 Performance coefficient of nominal condition
COPc, COPh
Under the specified nominal condition, the ratio of the heating (cooling) capacity of
the package expressed in the same unit to the total input power.
Note. COPc is the nominal cooling performance coefficient; COPh is the nominal heating
performance coefficient. The unit is watt per watt (W/W).
3.3 Coefficient of heating performance under low temperature condition
COPdh
Under the specified low temperature heating condition, the ratio of the heating
capacity of the package expressed in the same unit to the total input power.
3.4 Seasonal energy efficiency ratio
SEER
In the cooling season, the ratio -- of the total heat removed from the room by the
package TO the total power consumed.
3.5 Heating seasonal performance factor
HSPF
In the heating season, the ratio -- of the total heat delivered to the room by the
package TO the total power consumed.
4 Type and basic parameters
4.1 Type
4.1.1 According to the structural type, it is divided into.
4.1.2 According to the package function, it is divided into.
4.1.3 According to the end of the package matching, it is divided into.
4.2 Model
The compilation method of the package model can be determined by the manufacturer;
however, the model shall reflect the heating capacity of the package under the nominal
working conditions of this Part.
4.3 Basic parameters
4.3.1 The power supply of the package is rated voltage 380 V and rated frequency 50 Hz.
4.3.2 The package shall be able to work normally under the following conditions.
4.3.3 The test parameters of the package are shown in Table 1.
5 Technical requirements
5.1 General requirements
5.1.1 The package shall comply with the provisions of this Part and be manufactured
according to the drawings and technical conditions approved by the prescribed
procedures (or according to the agreement between the user and the manufacturer).
5.1.10 Before charging the refrigerant, the surfaces in contact with the refrigerant and
lubricating oil in the package shall be kept clean and dry; the outer surface of the
package shall be clean.
5.1.11 The installation of the components of the package shall be firm and reliable; the
refrigeration compressor shall have anti-vibration measures.
5.1.12 The insulation layer of the package shall be well insulated; there shall be no
condensation on the insulation layer when the package is operating normally. The
insulation layer shall be non-toxic, odorless, self-extinguishing.
5.1.13 The electrical control of the package shall include the control of the compressor,
circulating water pump and fan, etc.; it generally shall also have functions or devices
such as motor overload protection, phase loss protection (three-phase power supply),
water system interruption protection, anti-freeze protection, system high and low
voltage protection.
5.1.14 The package can be equipped with a cold (hot) water circulation pump according
to user requirements or actual use; its flow rate and head shall ensure the normal
operation of the package.
5.1.15 The content of harmful substances in the control system hardware of the package
shall comply with the provisions of GB/T 26572.
5.1.16 The safety and environmental requirements of the package shall comply with the
provisions of GB/T 9237.
5.2 Sealing performance and strength requirements
5.3 Operation test
The package shall be able to start normally during the operation test; there shall be no
abnormality during the operation.
5.4 Performance requirements
5.4.1 Nominal cooling capacity
When tested according to the method of 6.3.2.1, the measured cooling capacity of the
package shall not be less than 95% of the nominal cooling capacity.
5.4.9 Defrosting
When tested according to the method in 6.3.2.6, the package shall meet the following
requirements.
5.4.10 -25 °C Heating
When tested according to the method in 6.3.2.7, the safety device shall not be activated
during the 1 h test operation of the package.
5.4.11 Performance coefficient
5.5.3 Grounding device
5.5.3.1 The package shall have a permanent and reliable protective grounding device.
There shall be a permanent and reliable electrical connection between the motor frame
or motor-compressor unit and the protective grounding device. The electrical
equipment and control components of the package shall be centrally fixed and installed
in the electrical control cabinet; it shall be reliably connected to the protective
grounding device. The protective grounding circuit shall comply with the provisions of
8.2 of GB/T 5226.1-2019.
5.5.3.2 The protective grounding terminal shall not be used for other purposes except
for protective grounding. The protective grounding screws and grounding points shall
not be used for other mechanical fastening.
5.5.3.3 When the package is installed and the electrical connection is completed, the
continuity of the protective grounding circuit shall be checked by loop impedance test.
The test shall be carried out in accordance with the provisions of 6.3.5.3; the measured
voltage drop between the grounding terminal and each test point shall not exceed the
specified value in Table 3.
5.6 Variable working condition performance
The temperature conditions of variable working condition performance of the package
are shown in Table 4.The test is carried out according to the test method specified in
6.3.9 and a performance curve or table is drawn.
The degree of protection of the package shall be at least IPX4 as specified in GB/T
4208-2017.After the package is subjected to the splash test, its insulation resistance
and electrical strength shall still comply with the provisions of 5.5.1 and 5.5.2.
6 Test methods
6.1 Instrument accuracy and measurement requirements
6.1.1 The accuracy of the test instruments and meters shall comply with the provisions
of Appendix C of GB/T 10870-2014 and shall be calibrated or verified. For instruments
and meters that are susceptible to on-site wiring or installation, such as temperature and
pressure, it should calibrate the sensors, secondary instruments and software as a whole
at the measurement site.
6.1.2 The measurement shall be carried out in accordance with the following provisions.
6.2 Package installation and test requirements
6.3 Test items
6.3.1 Air tightness and pressure test
6.3.1.1 Air tightness test
The refrigerant side of the package shall be tested under the design pressure according
to the leakage test method in NB/T 47012-2010 and shall comply with the provisions of 5.2.1.
6.3.1.2 Vacuum test
After the air tightness test on the refrigerant side of the package is passed, it shall be
vacuumed to below 266 Pa and the pressure shall be maintained for at least 10 minutes,
which shall comply with the provisions of 5.2.1.
6.3.1.3 Pressure test
The water side of the package is tested at 1.25 times the design pressure (hydraulic
pressure) or 1.15 times the design pressure (gas pressure) according to the pressure test
method in NB/T 47012-2010; it shall comply with the provisions of 5.2.2.
6.3.2 Nominal working condition performance
6.3.2.8 Performance coefficient
The performance coefficient is obtained as follows.
6.3.2.9 Water side pressure loss
For the water side pressure loss in the cooling state, when conducting the nominal
operating condition cooling performance test, measure the package water side pressure
loss according to the provisions of Appendix B in GB/T 18430.1-2007.
6.3.2.10 Electric power consumed by auxiliary electric heating
When the package with auxiliary electric heating is tested for heating capacity
according to 6.3.2.2, when the heating operation is stable, the electric heating is
energized and the electric power of the auxiliary electric heating is measured, which
shall comply with the provisions of 5.4.13.
6.3.3 Noise and vibration test
6.3.3.1 Noise test
The package shall be tested in accordance with the provisions of Appendix C; the results
shall comply with the provisions of 5.4.14.
6.3.3.2 Vibration test
The vibration test of the package shall comply with the following provisions.
6.3.4 Operation test
Before leaving the factory, the package shall be powered at rated voltage and rated
frequency, to perform at least one startup test run.
6.3.5 Electrical safety performance test
6.3.5.1 Insulation resistance test
The test is carried out using an insulation resistance meter at a rated voltage level of
500 V. The measurement shall be carried out between the live parts of the package and
the non-live parts that may be grounded.
6.3.5.2 Electrical strength test
The electrical strength test of the package shall comply with the following provisions.
6.3.5.3 Grounding device
The grounding device of the package shall be tested in the following ways.
6.3.9 Variable working condition test
The package operates within the temperature range given in Table 4.When one
temperature condition is fixed and another temperature condition is changed (the other
is based on the flow rate and temperature conditions under nominal operating
conditions), its cooling (heating) capacity and corresponding power consumption are
measured. The test results are plotted as a curve or compiled into a table. Each curve or
each table shall contain no less than 4 measuring points.
6.3.10 Protection degree test
The splash water test is carried out according to the IPX4 level in GB/T 4208-2017.
Immediately after the test, the insulation resistance test of 6.3.5.1 and the electrical
strength test of 6.3.5.2 are carried out.
7 Inspection rules
7.1 General requirements
Each package shall be inspected and qualified by the manufacturer's quality inspection
department before it can exit factory.
7.2 Inspection categories
The inspection is divided into exit-factory inspection, sampling inspection, type
inspection. The inspection items, technical requirements, test methods shall be in
accordance with the provisions of Table 9.
7.3 Exit-factory inspection
Each package shall be subject to exit-factory inspection.
7.4 Sampling inspection
Batch-produced packages shall be subject to sampling inspection. The batch size,
sampling plan, inspection level, acceptance quality level shall be determined by the
manufacturer's quality inspection department.
7.5 Type inspection
7.5.1 The first product shall be subject to type inspection when the following
circumstances occur.
7.5.2 Type inspection shall be conducted once every three years.
8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Each package shall be provided with a permanent nameplate in a conspicuous
position. The nameplate shall comply with the provisions of GB/T 13306 and include
the contents of Table 10.When using flammable refrigerants, the nameplate shall also
provide a "Beware of Fire" warning sign in accordance with GB 2894-2008.The
vertical height of the sign shall not be less than 10 mm and may not be colored.
8.1.3 The package shall be marked with the number of the implementation standard in
the corresponding place (such as product manual, nameplate, etc.).
8.1.4 If the package uses flammable refrigerants, it shall be permanently marked in a
prominent position of the package in accordance with the color and style of the warning
symbol 2-2 "Beware of Fire" in GB 2894-2008.The vertical height of the marking
symbol shall not be less than 30 mm.
8.2 Packaging
8.2.1 The package shall be cleaned before packaging. All parts shall be clean and dry.
Rust-prone parts shall be coated with rust inhibitors.
8.2.2 The package shall be covered with a plastic cover or moisture-proof paper and
fixed in the packaging box. Its packaging shall comply with the provisions of GB/T
13384.
8.2.3 The packaging shall be accompanied by accompanying documents, including
product certificates, product manuals, packing lists.
The content of the product certificate shall include.
8.3 Transportation and storage
8.3.1 The package shall not be collided, tilted or exposed to rain and snow during
transportation and storage.
8.3.2 The package shall be charged or maintained with the specified refrigerant amount
before leaving the factory, or charged with dry nitrogen at 0.02 MPa ~ 0.03 MPa (gauge
pressure).
8.3.3 The product shall be stored in a dry and well-ventilated place; attention shall be
paid to moisture-proofing of the electrical system.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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