GB/T 25127.1-2010 (GB/T 25127.1-2020 Newer Version) PDF English
GB/T 25127.1-2010 (GB/T25127.1-2010, GBT 25127.1-2010, GBT25127.1-2010)
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Low ambient temperature air source heat pump(water chilling) packages -- Part 1: Heat pump(water chilling) packages for industrial & 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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Newer version: GB/T 25127.1-2020 Standards related to (historical): GB/T 25127.1-2020
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GB/T 25127.1-2010: PDF in English (GBT 25127.1-2010) GB/T 25127.1-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
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. SEPTEMBER 26, 2010
IMPLEMENTED ON. FEBRUARY 01, 2011
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Type and basic parameters ... 6
5 Requirements ... 8
6 Test methods ... 14
7 Inspection rules ... 21
8 Marking, packaging and storage ... 22
Appendix A (Informative) Integrated part load value IPLV (H) of heating for other
typical cities... 25
Low ambient temperature air source heat pump (water
chilling) packages - Part 1. Heat pump (water chilling)
packages for industrial & commercial and similar
application
1 Scope
This part of GB/T 25127 specifies the terms and definitions, types and basic
parameters, requirements, test methods, inspection rules, markings, packaging
and storage of low ambient temperature air source heat pump (water chilling)
packages for industrial & commercial and similar application (hereinafter
referred to as “packages”).
This part is applicable to the heating (chilling) water packages for central air-
conditioning or process use which has a cooling capacity of 50 kW or more and
uses the air source as heating (chilling) source, as well as the packages which
produce hot water at an ambient temperature not lower than -20 °C. Other
similar packages may make reference to this standard.
2 Normative references
The provisions in following documents become the provisions of this part
through reference in this part of GB/T 25127. For the dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard; however, parties who reach an agreement based on this
Standard are encouraged to study if the latest versions of these documents are
applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 10870-2001 The methods of performance test for positive
displacement and centrifugal water-chilling units and heat pump
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical
product
GB/T 17758 Unitary air conditioners
GB/T 18430.1-2007 Water chilling (heat pump) packages using the vapor
compression cycle - Part 1. Water chilling (heat pump) packages for
industrial and commercial and similar application
GB 25131 Safety requirements for water chillers (heat pump) using the vapor
compression cycle
JB/T 4330 Determination of noise emitted by refrigerating and air
conditioning equipment
JB/T 4750 Pressure vessels for refrigerant equipment
JB/T 7249 Terminology of cooling equipment
3 Terms and definitions
The terms and definitions as defined in JB/T 7249 as well as the following terms
and definitions apply to this part.
3.1
Low ambient temperature air source heat pump (water chilling)
packages
The integral or split equipment which uses the electric-motor-driven steam-
compressed cooling cycle, whose heating (cooling) water packages for
central air-conditioning or process use the air as heating (cooling) source,
which can produce hot water at an ambient temperature of not lower than -
20 °C.
3.2
Coefficient of performance COP (COPh, COPc)
In the nominal conditions as specified in Table 1, the value of the package
which is obtained by dividing the heating capacity (cooling capacity)
expressed in the same package by the total input electric power.
3.3
Integrated part load value IPLV (IPLV (H), IPLV (C))
The part load efficiency index of the heating (cooling) water packages for air-
conditioning use which is expressed by a single value. It is based on the part
load value of the packages under the part load conditions as specified in
Table 2. According to the weighing factors of the operating time of the
packages under the specific loads, it is calculated by the use of the formula
When the package is tested by the use of electronic halogen leak detector or
helium leak detector, the single point leakage rate of the package shall be lower
than 14 g/a, to fully guarantee the air-tightness of the package during the
application period.
5.2.2 Vacuum test
When the package is tested, all parts of the cooling system shall be free from
abnormal deformation, the pressure rise shall not exceed 0.15 kPa.
5.2.3 Pressure test
When the package is tested, there shall be neither abnormal deformation nor
water leakage in all parts of the water side.
5.3 Operation
The package shall, before being exit-factory, be subjected to operating test. The
package shall be free of abnormalities during operation. If the test conditions
are incomplete or for packages with rated voltages of 3000 V and above, it may
perform the operating test at the site of use.
5.4 Performance at nominal working conditions
When the package is tested under the nominal working conditions of heating
and cooling, the maximum deviation shall not exceed the following
requirements.
a) The heating capacity and cooling capacity shall not be less than 95% of
the nominal value;
b) The total electric power as consumed by the package shall not exceed
110% of the nominal power consumption of the package (the total electric
power consumed by the heating does not include the power consumed by
auxiliary electric heating);
c) The coefficient of performance under nominal working conditions COP
shall comply with the provisions of Table 3, meanwhile it shall not be less
than 92% of the nominal value of the package;
d) The power consumed by auxiliary electric heating of the heating package
of the heat pump which is equipped with auxiliary electric heating shall be
not more than 105% of the nominal power consumption of electric heating;
e) The pressure loss of cold (hot) water and cooling water shall not exceed
115% of the nominal value as specified for the package.
5.5 Integrated part load value
LF - Load factor, calculated by the formula (5);
LD - The load point as specified in Table 2;
QFL - The heating (cooling) capacity at full load, in kilowatts (kW);
QPL - The heating (cooling) capacity at part load, in kilowatts (kW).
c) If the package cannot be unloaded to 75%, allow the package to operate
at the minimum load, test the cooling (heating) coefficient of performance
under the load conditions of 75%, 50%, and 25% as specified in Table 2,
then calculate the COP at 75%, 50%, 25% load points according to
formula (3).
5.5.3 The integrated part load value IPLV (H) and IPLV (C) shall comply with
the provisions of Table 3. Meanwhile it shall not be less than 92% of the stated
value (when 92% of the package’s stated value is higher than the value as
specified in Table 3).
5.5.4 For the example of calculation of the integrated part load value, refer to
Appendix E of GB/T 18430.1-2007.
5.6 Conditions of design and use
The package shall operate normally under the temperature/flow conditions as
specified in Table 4.
5.6.1 Maximum load condition
When the package is operated according to the maximum load conditions in
Table 4, the motor, electrical components, connection wiring, other components
shall work normally.
5.6.2 Low-temperature conditions
The package shall work normally according to the low-temperature conditions
in Table 4, but it allows the unloading operation.
Table 7 -- Temperature deviation in defrosting, in degrees Celsius
Working conditions User side Heat-source side
Heating-defrosting of heat pump Water temperature at outlet Dry bulb temperature ± 3 ± 6
6.2.2 The package under testing shall be operated at rated frequency and rated
voltage. The frequency deviation shall not exceed 0.5 Hz, the voltage deviation
shall not exceed ± 5%.
6.2.3 The package under testing shall be installed in accordance with the
method as specified by the manufacturer, meanwhile it shall not affect the
structural modifications of the cooling capacity and heating capacity of heat
pump. The test environment of the package shall meet the requirements of
Appendix A of GB/T 18430.1-2007.
6.2.4 The water quality used by the package shall comply with the provisions of
Appendix D of GB/T 18430.1-2007.
6.3 Test methods
6.3.1 Air-tightness, vacuum, pressure test
6.3.1.1 Air-tightness
The cooling side of the package shall, under the design pressure, be inspected
according to the air-tightness test method in JB/T 4750. The results shall
comply with the provisions of 5.2.1.
6.3.1.2 Vacuum test
After passing the air-tightness test on the refrigerant side of the package,
vacuum it to 0.3 kPa and hold at least 30 minutes, which shall meet the
requirements of 5.2.2.
6.3.1.3 Pressure test
The water side of the package shall, at 1.25 times design pressure (hydraulic)
or 1.15 times design pressure (pneumatic), be inspected according to the
pressure test method of JB/T 4750. The results shall comply with the provisions
of 5.2.3.
6.3.2 Performance under nominal working conditions
6.3.2.1 Cooling capacity and total power consumption
Adjust the package’s unloading mechanism to the position of maximum cooling
capacity. Under the nominal cooling conditions as specified in Table 1,
according to the provisions of GB/T 10870, use the liquid secondary refrigerant
When the package equipped with auxiliary electric heating is subjected to
heating capacity test according to 6.3.2.2, after the measurement is stable,
energize the electric heating and determine the electric power consumed, which
shall comply with the provisions of 5.4 d).
6.3.2.5 Pressure loss at water side
In the case of cooling and heating performance test at nominal working
conditions, the measured pressure loss of cold water and hot water in
accordance with the method in Appendix B of GB/T 18430.1-2007 shall comply
with the provisions of 5.4 e).
6.3.3 Part load performance
6.3.3.1 Under the part load conditions of cooling as specified in Table 2, carry
out cooling test according to 6.3.2.1, calculate the cooling performance
coefficient according to formula (7), calculate the integrated part load value
IPLV (C) of cooling according to formula (2). The results shall comply with the
provisions of Tables 3 and 5.5.3.
6.3.3.2 Under the part load conditions of heating as specified in Table 2, use
the method below to perform the heating test.
25%, 100% load conditions. perform the heating test according to 6.3.2.2, use
the formula (6) to calculate the heating coefficient of performance;
50% load condition. perform the heating test according to 6.3.2.2. It is required,
at the end of the first defrosting, to carry out two cycles of heating and defrosting
process. According to the accumulated heating capacity (QΣh) and total power
consumption (NΣh), use the formula (8) to calculate the coefficient of
performance (COPh') under the average heating part load condition at this
condition;
75% load condition. perform the heating test according to 6.3.2.2. It is required,
at the end of the first defrosting, to carry out continuously one cycle of heating
and defrosting process. According to the accumulated heating capacity (QΣh)
and total power consumption (NΣh), use the formula (8) to calculate the
coefficient of performance (COPh') under the average heating part load
condition at this condition;
Then, use the formula (1) to calculate the integrated part load value IPLV (H) of
heating, which shall comply with the provisions of Tables 3 and 5.5.3.
According to the cumulative heating capacity QΣh (kWh) and total power
consumption NΣh (kWh) as measured under the corresponding part load
conditions, make calculations according to formula (8).
The package shall be subjected to vibration measurement as follows.
a) The frequency range of measuring instrument shall be 10 Hz ~ 500 Hz.
The relative sensitivity in this frequency range is based on the relative
sensitivity of 80 Hz as a reference. The relative sensitivity of other
frequencies shall be within the range of +10% ~ -20% of the reference
sensitivity.
b) The package is mounted on the platform. The installation platform and
foundation shall not generate additional vibration or package resonance.
The vibration value of the installation platform when the package is
running shall be less than 10% of the maximum vibration value of the
package under test.
c) Operation status of the package during measurement. The package shall
be determined under the nominal working conditions of the rated
frequency and rated voltage of the input power supply.
d) Configuration of measuring points. The number of measuring points is
generally one. The measuring point shall be arranged axially,
perpendicularly to axial direction, perpendicularly to axial direction in
horizontal plane right below the compressor under the rack.
e) Requirements for measurement. When measuring, the contact between
the sensor of the measuring instrument and the measuring point shall be
good, it shall ensure a reliable connection. The vibration value of the
package is based on the maximum data as measured at each measuring
point.
f) Test report. The test report shall indicate the package's model, the working
conditions for determination, the name of package’s manufacturer, the
number of product. The test report shall indicate the position of the
measuring point of the maximum vibration value.
6.3.7 Safety performance
The package shall be subjected to the safety performance test in accordance
with the provisions of GB 25131 “Safety requirements for water chillers (heat
pump) using the vapor compression cycle”, the results shall comply with the
provisions of 5.8.
6.3.8 Variable-voltage
In the nominal working conditions of cooling and heat pump’s heating in Table
4, the package shall be operated for 1 h within the range of ±5% of the rated
voltage value, it shall comply with the provisions of 5.9.
8.2.2 The package shall be covered by a plastic cover or moisture-proof paper
and shall be fixed in the packaging box. The packaging shall meet the
requirements of GB/T 13384.
8.2.3 The accompanied documents shall be attached to the packaging. The
accompanied documents include product certificate, product instruction,
packing list, etc.
8.2.3.1 The contents of the product certificate include.
a) Model and name;
b) Number of product;
c) Trademark and name of manufacturer;
d) Conclusions of inspection;
e) The signature and date of the inspector and the person in charge of the
inspection.
8.2.3.2 The contents of the product instruction include.
a) Working principle, characteristics and use;
b) Main technical parameters;
c) Structural schematic diagram, pressure loss, electrical wiring, etc.;
d) Installation instructions, use requirements, maintenance, precautions;
e) The name and quantity of the main components of the package.
8.2.3.3 Packing list.
8.2.3.4 Accompanied attachments.
8.3 Storage
8.3.1 The package shall be filled or maintained with the refrigerant of specified
amount before exit-factory; or otherwise filled with dry nitrogen of 0.02 MPa ~
0.03 MPa (gauge pressure).
8.3.2 The package shall be stored in a warehouse or covered place. When
stored in open storage according to the agreement, it shall pay attention to the
moisture resistance of the entire package as well as the self-control and
electrical systems.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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