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GB 30720-2014: Minimum allowable values of energy efficiency and energy efficiency grades for domestic gas cooking appliances
GB 30720-2014
GB
ICS 27.010
F 01
Minimum allowable values of energy efficiency
and energy efficiency grades for domestic gas
cooking appliances
ISSUED ON. JUNE 9, 2014
IMPLEMENTED ON. APRIL 01, 2015
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1. Scope ... 4 
2. Normative references ... 4 
3. Terms and definitions ... 4 
4. Technical requirements ... 5 
5. Testing and calculation methods ... 5 
6. Inspection rules ... 8 
Annex A ... 10 
Annex B ... 11 
Annex C ... 1 
Foreword
Sub-clause 4.3 in this Standard is mandatory; the rest are recommendatory.
This Standard is drafted according to the rules specified in GB/T 1.1-2009.
This Standard was proposed by Resource Saving and Environment Protection Department
of National Development and Reform Commission and Energy Saving and Comprehensive
Utilization Department of Industry and Information Technology.
This Standard shall be under the jurisdiction of National Technical Committee (SAC/TC 20)
on Energy Fundamentals and Management of Standardization Administration of China.
The responsible drafting organizations. China National Institute of Standardization, China
Quality Supervising and Test Center for Gas Appliances (CGAC), Hangzhou Robam
Appliances Co., Ltd, Haier Group, Zhongshan Vatti Gas Appliance Stock Co., Ltd, Foshan
Midea Kitchen Appliance Manufacturing Co., Ltd, Ningbo Fotile Kitchen Ware Co., Ltd,
China Quality Supervising and Test Center for Gas Appliances (Foshan), Guangdong
Macro Gas Appliance Co., Ltd, Xunda Science and Technology Group Co., Ltd, GuangDong
Vanward New Electric Co., Ltd, BSH Electrical Appliances (Jiangsu) Co,. Ltd, Guangzhou
Redsun Gas Appliances Co., Ltd, Guangdong Horisun Metal Manufacture Co., Ltd,
Zhejiang Meida Industrial Co., Ltd, Zhejiang Shuaikang Electric Stock Co., Ltd, Sakura
Bath Kitchen Products (China) Co., Ltd, Zhejiang Putian Electric Co., Ltd, Shanghai Rinnai
Co., Ltd, Electrolux(Hangzhou)Domestic Appliances Co., Ltd, and Zhejiang Supor
Domestic Electrical Appliance Co., Ltd.
The chief drafting staffs of this Standard. Wang Geng, Liu Tong, Wu Weiliang, Chen Xiong,
Yi Hongbin, Cao Ning, Zhang Binwei, Xu Deming, Hu Yelong, Yu Shaoyan, Wu Binqiang,
Zhao Gaohang, Liu Songhui, Liu Yanchun, Tan Liuming, Xia Zhisheng, Xia Deqi, Zhang
Jingzong, Li Bo, Jiang Hua, Tan Zhi, and Xiao Bing.
Minimum allowable values of energy efficiency and
energy efficiency grades for domestic gas cooking
appliances
1. Scope
This Standard specifies the minimum allowable values of energy efficiency, evaluating
values of energy-saving, energy efficiency grades, testing methods and inspection rules
for domestic gas cooking appliances.
This Standard is applicable to the domestic gas cooking appliances which use urban gas,
has a single combustor, and its rated thermal load is not more than 5.23 kW.
This Standard is not applicable to the gas cooking appliances used on moving vehicles.
2. Normative references
The articles contained in the following documents have become part of this document when
they are quoted herein. For the dated documents so quoted, all the modifications (Including
all corrections) or revisions made thereafter shall be applicable to this document.
GB/T 13611 Classification and essential property of city gas
GB 16410 Domestic gas cooking appliances
3. Terms and definitions
For the purpose of this document, terms and definitions given in GB 16410 and the
following terms and definitions apply.
3.1
Minimum allowable values of energy efficiency for domestic gas cooking appliances
According to the testing conditions specified in the standard, it refers to the minimum
thermal efficiency value to which the domestic gas cooking appliances should reach under
the rated thermal load.
3.2
Evaluating values of energy-saving for domestic gas cooking appliances
s -- Saturated water vapor pressure at temperature tg, unit. kPa; if dry gas flow meter
is used, then s shall be corrected by multiplying relative humidity of the testing gas;
M1 -- Mass of water added into the pan, unit. kg;
M2 -- Mass of the aluminum pan (including the cover and the stirrer), unit. kg.
d) Conduct two times of the above testing under the same conditions; when the
difference between the continuous two times of thermal efficiency is less than 1%,
take the average value as the actual thermal efficiency; otherwise, a new testing
shall be conducted until the requirements are met;
e) After the testing of actual thermal efficiency of the upper limited and lower limited
pans, the thermal efficiency of the tested cooking range shall be calculated according
to Formula (3).
Where.
η -- Thermal efficiency, %;
ηActual-Lower -- Actual thermal efficiency when the lower limited pan is used, %;
qLower -- Pan bottom thermal intensity when the lower limited pan is used during
the testing [Pan bottom thermal intensity = actual thermal load (W) / area of the
testing pan at the front plane of projection (cm²)], unit. W/cm²;
qUpper -- Pan bottom thermal intensity when the upper limited pan is used during
the testing, unit. W/cm²;
ηActual-Upper -- Actual thermal efficiency when the upper limited pan is used, %.
Note. For combustors with thermal load less than 1.72 kW, repeat the above thermal efficiency
testing two times under the same conditions; when the difference between the continuous two
times of thermal efficiency is less than 1%, take the average value as the final thermal efficiency.
6. Inspection rules
6.1 Exit-factory inspection
6.1.1 Energy efficiency shall be included in the exit-factory inspection items for domestic
gas cooking appliances.
6.1.2 Products with energy efficiency failing to meet the requirements specified in 4.3 after
η = ηActual-Lower +
qLower – 5.47
qLower – qUpper X (ηActual-Upper – ηActual-Lower)
inspection are not allowed to be delivered.
6.2 Type inspection
6.2.1 If one of the following conditions appears, type inspection of energy efficiency for
domestic gas cooking appliances shall be conducted.
a) Trial new products;
b) When product performance is significantly influenced due to changes in designs,
technical process or materials;
c) When national quality supervision department requires the type inspection.
6.2.2 Sampling of energy efficiency inspection. Sample 3 sets of samples each time; 2 for
testing and 1 for standby use. If both of the 2 samples tested meet the requirements of this
Standard, then this batch of products are deemed as qualified; if neither of the two samples
tested meet the requirements of this Standard, then this batch of products are deemed as
unqualified. If the minimum allowable value of energy efficiency of 1 of the 2 samples tested
does not meet the requirements of this Standard, then the sample of gas cooking appliance
for standby use shall be tested. If it successfully passes the test, then this batch of products
are deemed as qualified; otherwise, this batch of products are deemed as unqualified.
Annex C
(Normative)
Pan for testing of gas cookers and amount of heating water
Pan for testing of gas cookers and amount of heating water are shown in Table C.1.
Table C.1 Pan for testing of gas cookers and amount of heating water
Actual
thermal
load/ kW
Dimensions of the pan/ mm Other parameters Amount of
the heating
water/kg
Treatment requirements of pan
surface
Pan inner
diameter
Thickness of
pan bottom*
Thickness of
pan wall*
Depth of
the pan H
Radius of
bottom angle
Basal area
Mass of
the pan/ g
Mass of
the pan
cover/ g
~1.72 200
2 1.5
130 2.5 314 540 125 3 The pan for testing adopts.
pan with matt black bottom;
chromatic value meet the
following requirements.
Testing conditions. adopt SCI
(including specular reflection
light) method; standard
observation angle is 10°; use
D65 standard light source.
2.08 220 140 3 380 680 149 4
2.48 240 150
3.5
452 800 177 5
2.91 260
2.5 1.8
160 531 965 208 6
3.36 280 170 615 1130 290 8
3.86 300 180 707 1350 323 10
4.40 320 190 804 1520 360 12
4.95~ 340 200 4 907 1800 402 14
Tolerance ±1% ±1% 0~0.5 ±5% ±5%