GB/T 10870-2014 PDF in English
GB/T 10870-2014 (GB/T10870-2014, GBT 10870-2014, GBT10870-2014)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 10870-2014 | English | 245 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
The methods of performance test for water chilling (heat pump) packages using the vapour compression cycle [including 2015XG1]
| Valid |
| GB/T 10870-2001 | English | 519 |
Add to Cart
|
4 days
|
The methods of performance test for positive displacement and centrifugal water-chilling units and heat pump
| Obsolete |
| GB/T 10870-1989 | English | RFQ |
ASK
|
3 days
|
The methods of performance test for reciprocating and screw water-chilling units
| Obsolete |
Standards related to (historical): GB/T 10870-2014
PDF Preview
GB/T 10870-2014: PDF in English (GBT 10870-2014) GB/T 10870-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.200
J 73
Replacing GB/T 10870-2001
The methods of performance test for water chilling
(heat pump) packages using the vaper compression
cycle
[Including Amendment 2015XG1]
ISSUED ON: JUNE 24, 2014
IMPLEMENTED ON: DECEMBER 31, 2014
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 Test requirements ... 6
5 Test method ... 9
6 Test deviation ... 17
7 Gross electric power ... 18
8 Evaluation of the coefficient of performance ... 19
9 Example of performance uncertainty analysis ... 20
Appendix A (Normative) Heating performance test requirements for air-cooled
and evaporative-cooled chilling water (heat pump) packages ... 21
Appendix B (Normative) Air inlet temperature measurement of air-cooled and
evaporative-cooled chilling water (heat pump) packages ... 28
Appendix C (Normative) Provisions on the type and accuracy of test
instruments ... 33
Appendix D (Normative) The measurement and calculation of the input power
of the compressor, oil pump, fan and water pump ... 35
Appendix E (Informative) Example of uncertainty analysis of cooling
performance measurement of water-cooled water chilling package ... 38
No.1 Amendment [2015XG1] ... 46
The methods of performance test for water chilling
(heat pump) packages using the vaper compression
cycle
1 Scope
This standard specifies the terms and definitions, test provisions, test methods,
test deviations, gross electric power, evaluation of performance coefficients, etc.
of the main performance parameters of chilling water (heat pump) packages
driven by electric motors using vapor compression refrigeration cycles.
This standard applies to the performance test of chilling water (heat pump)
packages (hereinafter referred to as "packages") driven by electric motors that
use vapor compression refrigeration cycles. The cooling tower integrated
package, brine package, glycol package, etc. can be implemented with
reference to this standard.
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 2624.1 Measurement of fluid flow by means of pressure differential
devices inserted in circular cross-section conduits running full - Part 1:
General principles and requirements
GB/T 2624.2 Measurement of fluid flow by means of pressure differential
devices inserted in circular cross-section conduits running full - Part 2:
Orifice plates
GB/T 2624.3 Measurement of fluid flow by means of pressure differential
devices inserted in circular cross-section conduits running full - Part 3:
Nozzles and Venturi nozzles
GB/T 2624.4 Measurement of fluid flow by means of pressure differential
devices inserted in circular cross-section conduits running full - Part 4:
Venturi tubes
Under the specified heating capacity test conditions, the ratio of the
package's heating capacity to the gross electric power of heating, expressed
in W/W.
4 Test requirements
4.1 General rules
4.1.1 Eliminate the non-condensable gas in the refrigeration system of the
package and confirm that there is no refrigerant leakage.
4.1.2 There shall be enough refrigerant in the refrigeration (heating) system of
the package (according to the requirements of the instruction manual). If the
refrigerant is a mixed working fluid, it shall ensure its composition and
constitution; it shall maintain the amount of lubricating oil for normal operation
in the compressor.
4.1.3 The test system shall be equipped with thermometer casing and pressure
gauge outlet joints.
4.1.4 The test equipment and instruments used in the test shall not hinder the
normal operation and operation of the package.
4.1.5 The water side of the package which uses side heat exchanger, heat
exchanger on the heat source side and oil cooler shall be cleaned.
4.1.6 The water quality used by the package shall meet the requirements of GB
50050.
4.1.7 The test environment of air-cooled and evaporative cooling packages
shall be sufficiently spacious. The air velocity at a distance of 0.5 m from the
package shall not be greater than 2 m/s.
4.2 Test requirements
4.2.1 The performance test of the water-cooled package shall include the main
test and the verification test, both of which shall be measured at the same time.
When the air-cooled and evaporative cooling package are subjected to the main
test, two sets of instruments shall be used for simultaneous measurement.
During the performance test of the package, a set of measuring instrument
interfaces shall be reserved at the corresponding measuring point for third-party
testing.
The verification test is only applicable to water-cooled packages. The air-cooled
and evaporative cooling packages are not subject to verification test.
- Liquid refrigerant flow meter method (see 5.3).
4.3.3 The air inlet temperature measurement of air-cooled and evaporative-
cooled packages shall be carried out in accordance with Appendix B.
4.4 Test parameters
During the test, the test parameters are executed in accordance with the
provisions of GB/T 18430.1 or GB/T 18430.2.
4.5 Instrumentation
4.5.1 Test instruments and meters shall be qualified by the statutory
metrological inspection department and within the validity period.
4.5.2 The type and accuracy of test instruments and meters shall be in
accordance with Appendix C.
4.6 Test data
4.6.1 Generally, the data to be recorded are:
- Test date, location and personnel;
- Package model and exit-factory number;
- Power supply voltage and frequency;
- The gross electric power of the package;
- Cold (hot) water inlet and outlet temperature at user side;
- Cold (hot) water volume flow at user side;
- Pressure drop at water inlet and outlet side at user side;
- Refrigerant, lubricating oil and its filling volume;
- Atmospheric pressure and ambient temperature;
- Instructions for heat exchanger insulation at user side.
4.6.2 For water-cooled packages, it shall also record:
- Water inlet and outlet temperature on the heat source side;
- Water volume flow on the heat source side;
- The pressure drop on the inlet and outlet side of the heat source.
QI,r - The correction term of heat as released from the refrigerant side of the
heat exchanger on the heat source side to the ambient air, in watts (W);
QII - The total heat released (absorbed) by auxiliary equipment such as the
oil separator and oil cooler from the compressor to the condenser segment
to the ambient air, in watts (W);
P - The input power of the compressor motor, oil pump motor, electric heater,
etc. of the water-cooled package, in watts (W);
Qr,r - The correction term of the heat as introduced from ambient air into the
refrigerant side of the heat exchanger on the user side, in watts (W);
Kf - The heat transfer coefficient between the outer surface of the above
auxiliary equipment and the ambient air, in watts per square meter Celsius
[W/(m2·°C)];
Af - The external surface area of the aforementioned auxiliary equipment, in
square meters (m2);
tr - The average temperature of the outer surface of the above-mentioned
auxiliary equipment, in degrees Celsius (°C);
ta - The ambient air temperature, in degrees Celsius (°C);
Qh,f - The package's heating capacity measured in the verification test (of
water-cooled heat pump package), in watts (W);
QI,h - The correction item of heat as released by the refrigerant side of heat
exchanger on the user side to the ambient air, in watts (W);
Qr,h - The correction term of as introduced from the ambient air into the
refrigerant side of the heat exchanger on the heat source side, in watts (W);
Ke - The heat transfer coefficient between the outer surface of the heat
exchanger and the ambient air, in watts per square meter [W/(m2·°C)][can
take K = 20 W/(m2·°C)];
Ae - The external surface area of the water side of the heat exchanger on
the user side, in square meters (m2);
tr,m - The average temperature of the outer surface of the refrigerant side of
the heat exchanger on the user side (i.e., the saturation temperature of the
refrigerant), in degrees Celsius (°C);
Kh - The heat transfer coefficient between the outer surface of the heat
exchanger on the heat source side and the ambient air, in watts per square
meter Celsius [W/(m2·°C)];
Qn1 - The cooling capacity of the package tested and measured with a set of
test instruments (for air-cooled or evaporative-cooled), in watts (W);
Qn2 - The cooling capacity of the package tested and measured with another
set of test instruments (for air-cooled or evaporative-cooled), in watts (W);
Qh1 - The heating capacity of the package tested and measured with a set
of test instruments (for air-cooled or evaporative-cooled), in watts (W);
Qh2 - The heating capacity of the package tested and measured with another
set of test instruments (for air-cooled or evaporative-cooled), in watts (W);
Nn - The total electric power of cooling of the package measured in the main
test (for water-cooled), in watts (W);
Nh - The total electric power of heating of the package measured in the main
test (for water-cooled), in watts (W);
Nn1 - The total electric power of cooling of the package tested and measured
with a set of test instruments (for air-cooled or evaporative-cooled), in watts
(W);
Nn2 - The total electric power of cooling of the package tested and measured
with another set of test instruments (for air-cooled or evaporative-cooled), in
watts (W);
Nh1 - The total electric power of heating of the package tested and measured
with a set of test instruments (for air-cooled or evaporative-cooled), in watts
(W);
Nh2 - The total electric power of heating of the package tested and measured
with another set of test instruments (for air-cooled or evaporative-cooled), in
watts (W).
9 Example of performance uncertainty analysis
Refer to Appendix E for an example of uncertainty analysis of heating
performance measurement of water-cooled packages.
a Applicable to the heating mode of the heat pump, except for the defrosting process and the first 10 minutes after
the end of the defrosting.
b Applicable to the heat pump's defrosting process and the first 10 minutes after the defrosting.
A.4 Heating capacity test results
A.4.1 Calculation of steady-state heating capacity
A.4.1.1 Use the average heating value recorded in 35 minutes of the data
collection stage as the average heating value.
A.4.1.2 Use the average input power recorded in 35 minutes or the integrated
input power recorded in 35 minutes during the data acquisition stage as the
average input power.
A.4.2 Calculation of non-steady-state heating capacity
A.4.2.1 For the data collection period, if one or more complete cycles are
included, the average heating capacity of the package shall be determined by
the integrated heating capacity and all the time included in the data collection
period; the average input electric power shall be determined by the integrated
input power and the time which is same as the measured heating capacity in
the data collection stage.
Note: A complete cycle includes a heat pump heating process and a defrosting process
from the end of the defrost to the end of the next defrost.
A.4.2.2 For a complete cycle that does not occur during the data collection
period, the average heating capacity of the package shall be determined by the
integrated heating capacity and the occurrence time during the data collection
period; the average input electric power shall be determined by the integrated
input power and the time which is same as the measured heating capacity in
the data collection stage.
A.5 Example diagram of heating performance test process during
defrosting
A.5.1 All examples include a case where a defrost cycle is used to end the
pretreatment stage. The data collection cycle of the non-steady state test needs
to last 3 hours or 3 complete cycles.
A.5.2 Example diagrams of heating performance test process during defrosting
are as shown in Figure A.1 ~ Figure A.6.
Appendix B
(Normative)
Air inlet temperature measurement of air-cooled and evaporative-cooled
chilling water (heat pump) packages
B.1 Overview
This Appendix specifies the measurement method of the air inlet temperature
of air-cooled and evaporative-cooled chilling water (heat pump) packages;
meanwhile specifies the air inlet temperature distribution requirements of the
package during the test of this type of package.
B.2 Definition
B.2.1 Air sampler
The air sampler is an air sampling tube assembly that extracts air through the
sampling tube, to provide a uniform air sample entering the air-cooled heat
exchange coil.
B.2.2 Temperature and humidity measuring box
The temperature and humidity measuring box is a device connected with an air
sampler, to install a probe for measuring air temperature and humidity.
B.3 General requirements
B.3.1 The temperature measuring instrument and its accuracy shall meet the
requirements of Appendix C.
B.3.2 The test chamber and the test device shall be reasonably designed and
operated, to ensure sufficient air distribution and sufficient air mixing.
B.3.3 The test environment shall avoid the recirculation of the exhaust air of the
air-cooled heat exchanger coil of the package. The following methods can be
used to check whether the exhaust air of the heat exchanger is recycled back
to the heat exchanger coil: install multiple single reading thermocouple evenly
around the exhaust outlet of the package (at least one for each sampling
position), the installed thermocouple is located below the air-cooled heat
exchange coil fan's exhaust plane and just over the top of the air-cooled heat
exchanger coil. The difference between the temperature of these
thermocouples and the temperature measured at the temperature and humidity
measuring box shall not exceed 2.8 °C.
Celsius (°C);
tw2,c - The temperature of the water outlet on the heat source side, in degrees
Celsius (°C);
P0 - The input power of the compressor motor, oil pump motor, electric heater,
etc. of the water-cooled package, in watts (W);
U(Qnc) - The expanded uncertainty of the package's cooling capacity
measured in the verification test;
k - Inclusion factor;
u7 - Category A standard uncertainty component as caused by repeated
measurement of verification test;
u8 - Category B standard uncertainty component of the flow test system in
the verification test;
u9 - The category B standard uncertainty component of the inlet water
temperature test system in the verification test;
u10 - The category B standard uncertainty component of the outlet water
temperature test system in the verification test;
u11 - Standard uncertainty of input power.
E.2 Evaluation of standard uncertainty components
E.2.1 Category A evaluation of standard uncertainty components
Carry out no less than 7 independent repeated measurements on the tested
water chilling package; the measurement data (example values) are as shown
in Table E.1.
E.2.2.1 Overview
Based on the average value of each measurement, calculate the sensitivity
coefficients, then obtain the measurement uncertainty components.
E.2.2.2 Uncertainty components of main test measurement parameters
The sensitivity coefficient c2 is 20869 kJ/m3; the uncertainty given by the
verification/calibration certificate is 0.1%FS (example value); then it obtains u2
= 3 × 10-5 m3/s, then the uncertainty component of the flow of the main test is
c2u2 = 0.626 kW. The sensitivity coefficient c3 is 60.86 kW/K; the uncertainty
given by the verification/calibration certificate is u3 = 0.03 K (example value);
then the uncertainty component of the inlet water temperature of the main test
is c3u3 = 1.757 kW. The sensitivity coefficient c4 is -60.86 kW/K; the uncertainty
given by the verification/calibration certificate is u4 = 0.03 K (example value);
then the uncertainty component of the outlet water temperature of the main test
is c4u4 = -1.757 kW.
E.2.2.3 Category B standard uncertainty of input power
The maximum allowable error of the power meter is ±0.5% (example value).
Considering the uniform distribution, the category B standard uncertainty of the
input power is:
E.2.2.4 Uncertainty components of measurement parameters in the
verification test
The sensitivity coefficient c8 is 20635 kJ/m3; the uncertainty given by the
verification/calibration certificate is 0.1%FS (example value), so it obtains the
standard uncertainty u8 = 3 × 10-5 m3/s; then the uncertainty component of flow
rate of the calibration test is c8u8 = 0.619 kW. The sensitivity coefficient c9 is -
72.67 kW/K; the uncertainty given by the verification/calibration certificate is u9
= 0.03 K (example value); then the uncertainty component of the inlet water
temperature in the verification test is c9u9 = -2.181 kW. The sensitivity coefficient
c10 is 72.67 kW/K; the uncertainty given by the verification/calibration certificate
is u10 = 0.03 K (example value), then the uncertainty component of the outlet
water temperature in the verification test is c10u10 = 2.181 kW.
E.3 Evaluation of composite standard uncertainty
Table E.2 gives the standard uncertainty data.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
|