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GB/T 25127.1-2010 English PDF (GBT25127.1-2010)

GB/T 25127.1-2010 English PDF (GBT25127.1-2010)

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GB/T 25127.1-2010: 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 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 and amp; commercial and similar application.
GB/T 25127.1-2010
GB
NATIONAL STANDARD OF THE
PEOPLE 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 and 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 and 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 and 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 (Q??h) and total power consumption (N??h), 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 (Q??h) and total power consumption (N??h), 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 Q??h (kWh) and total power
consumption N??h (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.

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