GB 19762-2007 PDF English (GB 19762-2005: Older version)
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The minimum allowable values of energy efficiency and evaluating values of energy conservation of centrifugal pump for fresh water
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The minimum allowable values of energy efficiency and evaluating values of energy conservation of centrifugal pump for fresh water
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GB 19762-2007: PDF in English GB 19762-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
F 01
Replacing GB 19762-2005
The minimum allowable values of energy efficiency
and evaluating values of energy conservation of
centrifugal pump for fresh water
ISSUED ON. NOVEMBER 2, 2007
IMPLEMENTED ON. JULY 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Basic requirements ... 6
5 Pump efficiency ... 6
6 The minimum allowable values of energy efficiency for pumps ... 7
7 The target minimum allowable values of energy efficiency for pumps ... 7
8 The evaluating values of energy conservation for pumps ... 8
Appendix A ... 17
Foreword
Clause 6 and Clause 7 of this Standard are mandatory; the rest are
recommendatory.
This Standard replaces GB 19762-2005 The minimum allowable values of
energy efficiency.
Compared with GB 19762-2005, this Standard mainly makes the following
changes.
- Added the target minimum allowable values of energy efficiency for pump;
index increase rate is 1% ~ 2%;
- Added Table 2, Table 3 and Table 4;
- Modified Figure 1 and Figure 2 of GB 19762-2005;
- Modified 5.1 of GB 19762-2005;
- Deleted Figure 5 and Figure 6 of GB 19762-2005;
- Deleted Clause 4 of GB 19762-2005;
- Deleted content about centrifugal long axis deep well pump.
Appendix A and Appendix B of this Standard are informative.
This Standard was proposed by National Technical Committee on Energy
Fundamentals and Management of Standardization Administration of China.
This Standard shall be under the jurisdiction of Sub-technical Committee on
Reasonable Electricity of National Technical Committee on Energy
Fundamentals and Management of Standardization Administration of China.
Drafting organizations of this Standard. China National Institute of
Standardization, Zhejiang University of Technology, Institute of Industrial
Pumps, Shenyang Institute of Pumps, Shanghai East Pump (Group) Co., Ltd.,
Shanghai Kaiquan Pump (Group) Co., Ltd., Shanghai Liancheng (Group) Co.,
Ltd., Guangdong Foshan Pump Factory Co., Ltd., National Center for
Supervision & Inspection of Drainage Irrigation & Water-saving Equipment
Products Quality, and Shanghai People Electricity Machine Limited.
Main drafters of this Standard. Zhang Xin, Mou Jiegang, Zhao Yuejin, Liu
Weiwei, Yuan Zongjiu, Xiao Gonghuai, Song Qingsong, Chen Longling, Hu Tao
and Liu Ping.
The minimum allowable values of energy efficiency
and evaluating values of energy conservation of
centrifugal pump for fresh water
1 Scope
This Standard specifies basic requirements, pump efficiency, the minimum
allowable values of energy efficiency, the target minimum allowable values of
energy efficiency, and evaluating values of energy conservation of centrifugal
pump for fresh water (hereinafter referred to as “pump”).
This Standard is applicable to single-stage single-suction, single-stage double-
suction and multi-stage centrifugal pumps for fresh water.
This Standard does not apply to other types of pumps.
2 Normative references
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 3216-2005 Rotodynamic pumps Hydraulic performance acceptance
tests Grades 1 and 2 (ISO 9906.1999, MOD)
GB/T 5657-1995 Technical specifications for centrifugal pumps - Class III
(eqv ISO 9908.1993)
GB/T 7021 Glossary of terms for centrifugal pump
GB/T 13006 NPSH for centrifugal, mixed flow and axial pumps
3 Terms and definitions
Terms and definitions defined in GB/T 7021 and the following ones apply to this
Pu - Pump output power (effective power), in kilowatts (KW);
Pa - Pump shaft power (input power), in kilowatts (KW).
5.2 Pump output power is calculated according to formula (2).
Where,
ρ - Density, in kilograms per cubic meter (kg/m3);
g - Acceleration of gravity, g = 9.81 m/s2;
Q - Flow, in cubic meters per second (m3/s);
H - Head, in meters (m).
6 The minimum allowable values of energy efficiency
for pumps
6.1 When flow is within 5 m3/h ~ 10000 m3/h, the minimum allowable values
of energy efficiency for pumps η1 shall be determined according to Table 1.
Calculation examples are shown in Appendix A.
6.2 When flow is greater than 10000 m3/h, the minimum allowable values of
energy efficiency for single-stage single-suction centrifugal pump for fresh
water η1 shall be 87% and that for single-stage double-suction centrifugal pump
for fresh water η1 shall be 86%.
7 The target minimum allowable values of energy
efficiency for pumps
7.1 When flow is within 5 m3/h ~ 10000 m3/h, specific speed is within 20~300,
the target minimum allowable values of energy efficiency for pumps η2 shall be
determined as follows. η2 for single-stage centrifugal pump for fresh water shall
be directly read from Figure 1 curve “the target minimum allowable values” or
checked from column “the target minimum allowable values” in Table 2; η2 for
multi-stage centrifugal pump for fresh water shall be directly read from Figure 2
curve “the target minimum allowable values” or checked from column “the target
minimum allowable values” in Table 3. If specific speed is within 20~120 and
210~300, its target minimum allowable values η2 shall be respectively corrected
based on the provisions of Figure 3, Figure 4 or Table 4. Calculation examples
are shown in Appendix B.
7.2 When flow is greater than 10000 m3/h, the target minimum allowable
values for pumps η2 shall be 88%.
7.3 The target minimum allowable values for pumps η2 shall be implemented
3 years after the date of implementation of this Standard, and shall replace the
minimum allowable values of energy efficiency for pumps η1 in Clause 6 of this
Standard.
8 The evaluating values of energy conservation for
pumps
8.1 When flow is within 5 m3/h ~ 10000 m3/h, the evaluating values of energy
conservation for pumps η3 shall be determined according to Table 1. Calculation
examples are shown in Appendix A.
8.2 When flow is greater than 10000 m3/h, the evaluating values of energy
conservation for pumps η3 shall be 90%.
column “reference
value”
Single-
stage
double-
suction
centrifugal
pump for
fresh
water
≤ 600
120~210
According to Figure 1
curve “reference value”
or check η in Table 2
column “reference
value”
0 η０ = η η１= η０− 3 η3= η０+ 2
< 120, >210
According to Figure 1
curve “reference value”
or check η in Table 2
column “reference
value”
According to Figure 3
or Figure 4 or check
Δη in Table 4
η０ = η − Δη η１= η０− 3 η3= η０+ 2
>600
120~210
According to Figure 1
curve “reference value”
or check η in Table 2
column “reference
value”
0 η０ = η η１= η０− 4 η3= η０+ 1
< 120, >210
According to Figure 1
curve “reference value”
or check η in Table 2
column “reference
value”
According to Figure 3
or Figure 4 or check
Δη in Table 4
η０ = η − Δη η１= η０− 4 η3= η０+ 1
Multi-
stage
centrifugal
pump for
≤ 100 120~210
According to Figure 2
curve “reference value”
or check η in Table 3
column “reference
0 η０ = η η１= η０− 3 η3= η０+ 2
fresh
water
value”
< 120, >210
According to Figure 2
curve “reference value”
or check η in Table 3
column “reference
value”
According to Figure 3
or Figure 4 or check
Δη in Table 4
η０ = η − Δη η１= η０− 3 η3= η０+ 2
>100
120~210
According to Figure 2
curve “reference value”
or check η in Table 3
column “reference
value”
0 η０ = η η１= η０− 4 η3= η０+ 1
< 120, >210
According to Figure 2
curve “reference value”
or check η in Table 3
column “reference
value”
According to Figure 3
or Figure 4 or check
Δη in Table 4
η０ = η − Δη η１= η０− 4 η3= η０+ 1
NOTE The reference value is the average value of the efficiency of better products in the current pump industry.
Reference
value
η/%
75.3 76.9 79.2 80.6 81.5 82.2 82.8 83.1 83.5 83.9 84.8 85.1 85.5
Target
minimum
value
η2/%
73.3 74.9 77.2 78.6 79.5 80.2 80.8 81.1 81.5 81.9 82.8 83.1 83.5
Table 4 ns=20~300 Corrected efficiency value of single-stage and multi-stage
centrifugal pumps for fresh water
ns 20 25 30 35 40 45 50 55 60 65
Δη/% 32 25.5 20.6 17.3 14.7 12.5 10.5 9.0 7.5 6.0
ns 70 75 80 85 90 95 100 110 120 130
Δη/% 5.0 4.0 3.2 2.5 2.0 1.5 1.0 0.5 0 0
ns 140 150 160 170 180 190 200 210 220 230
Δη/% 0 0 0 0 0 0 0 0 0.3 0.7
ns 240 250 260 270 280 290 300
Δη/% 1.0 1.3 1.7 1.9 2.2 2.7 3.0
A.5 Calculation of the minimum allowable values of energy efficiency η1
η1= η0−4%=82.9%−4%=78.9%.
A.6 Calculation of evaluating values of energ...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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