GB/T 19141-2026 Specification of domestic solar water heating systems English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 19141-2026
Specification of domestic solar water heating systems
家用太阳能热水系统技术条件
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Product Classification and Marking
6 Design and Installation Requirements
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Documentation
11 Packaging, Transport and Storage
Figure 1 — Schematic diagram of the contour aperture area of a solar collector
Figure 2 — Marking of a domestic solar water heating system
Figure 3 — Schematic diagram of the pressure test apparatus for the liquid working fluid of a domestic solar water heating system
Figure 4 — Schematic diagram of the stagnation test apparatus for a domestic solar water heating system
Figure 5 — Schematic diagram of the external thermal shock test apparatus for a domestic solar water heating system
Figure 6 — Schematic diagram of the rain test apparatus for a domestic solar water heating system
Figure 7 — Schematic diagram of the internal thermal shock test apparatus for a domestic solar water heating system
Figure 8 — Schematic diagram of the freezing test apparatus for a domestic solar water heating system
Table 1 — Provisions for marking each part of a domestic solar water heating system
Table 2 — Permissible deviation between the inner tank thickness of cold rolled stainless steel sheets and the nominal thickness
Technical specifications for domestic solar water heating systems
1 Scope
This document gives the terms and definitions, and symbols for domestic solar water heating systems, and specifies the product classification and marking, design and installation requirements, technical requirements, test methods, inspection rules, documentation, packaging, transport and storage.
This document applies to domestic solar water heating systems with a water storage tank capacity not greater than 0.6 m³.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 191 Packaging — Pictorial marking for handling of goods
GB 3100 International system of units (SI) and its application
GB/T 3280 Cold rolled stainless steel plate, sheet and strip
GB/T 4272 General principles of thermal insulation technique for equipment and pipes
GB/T 4706.1 Safety of household and similar electrical appliances — Part 1: General requirements
GB/T 4706.12 Safety of household and similar electrical appliances — Part 12: Particular requirements for storage water heaters
GB/T 4706.32 Safety of household and similar electrical appliances — Part 32: Particular requirements for heat pumps, air conditioners and dehumidifiers
GB/T 4706.66 Safety of household and similar electrical appliances — Part 66: Particular requirements for pumps
GB/T 6424 Flat plate solar collectors
GB 8877 Safety requirements for installation, use and maintenance of household and similar electrical appliances
GB/T 12936 Solar thermal utilization terminology
GB/T 13384 General specifications for packaging of mechanical and electrical products
GB/T 17049 All glass evacuated solar collector tubes
GB/T 17581 Evacued tube solar collectors
GB/T 18708 Test methods for thermal performance of domestic solar water heating systems
GB/T 19775 Glass to metal sealed heat pipe evacuated solar collector tubes
GB/T 19835 Self regulating electric heating cables
GB/T 23888 Controllers for domestic solar water heating systems
GB/T 23889 Technical specifications for domestic solar water heating systems with auxiliary heat pump
GB/T 25966 Technical specifications for domestic solar water heating systems with auxiliary electric energy
GB/T 25967 Test methods for thermal performance of domestic solar water heating systems with auxiliary energy
GB/T 26975 All glass heat pipe evacuated solar collector tubes
GB 50057 Design code for protection of structures against lightning
NB/T 10785 Test method for performance of domestic solar water heating systems under indoor solar simulation environment
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB 3100, GB/T 12936, GB/T 18708, GB/T 23889 and the following apply.
3.1 contour aperture area
The maximum effective area of a solar collector onto which sunlight is projected.
NOTE: As shown in Figure 1.
3.2 daily useful energy per contour aperture area of domestic solar water heating system
Under a certain solar irradiance, the daily useful energy per unit contour aperture area of the water in the water storage tank, when the water temperature in the tank is not lower than the specified value.
3.3 average heat loss factor of domestic solar water heating system
Under conditions of no solar irradiance, the average heat loss per unit time and per unit volume of the domestic solar water heating system when the temperature difference between the stored water in the system and the ambient temperature is 1 K.
3.4 pressure resistance
The ability of the water storage tank and the piping system through which water from the tank directly passes to withstand a certain pressure.
4 Symbols
The symbols given in GB/T 18708 and the following apply to this document.
A꜀ — Measured value of contour aperture area, m²
A꜀₁ — Nominal value of contour aperture area, m²
Cₚᵥ — Specific heat capacity of water, J/(kg·°C)
H — Daily solar irradiance, MJ/m²
m — Mass of water in the water storage tank, kg
q — Daily useful energy per unit contour aperture area of the domestic solar water heating system during the test, MJ/m²
q₁₇ — Daily useful energy per unit contour aperture area of the domestic solar water heating system when the solar irradiance is 17 MJ/m², MJ/m²
q’₁₇ — Daily useful energy per unit contour aperture area of the domestic solar water heating system when the solar irradiance is 17 MJ/m², kWh/m²
tբ — Temperature of the water in the water storage tank at the beginning of the heat collection test, °C
tₑ — Temperature of the water in the water storage tank at the end of the heat collection test, °C
tբ — Final temperature of the water in the water storage tank during the heat loss test, °C
tᵢ — Initial temperature of the water in the water storage tank during the heat loss test, °C
tₐₛ — Air temperature near the water storage tank, °C
t₁₇ — Final water temperature in the water storage tank when the solar irradiance is 17 MJ/m², °C
Uₛₗ — Average heat loss factor of the domestic solar water heating system, W/(m³·K)
V — Measured value of water volume in the water storage tank, m³
V₁ — Nominal value of water volume in the water storage tank, m³
v — Ambient air speed, m/s
ρᵥ — Density of water, kg/m³
ΔA꜀ — Deviation rate between the nominal and measured values of contour aperture area, dimensionless
ΔV — Deviation rate between the nominal and measured values of water volume in the water storage tank, dimensionless
Δτ — Time interval, s
(av) — Average value of a parameter
NOTE: (av) is used as a subscript.
5 Product Classification and Marking
5.1 Product classification
The classification of domestic solar water heating systems shall comply with GB/T 18708.
5.2 Product marking
5.2.1 Marking content
The product marking of a domestic solar water heating system consists of the following six parts, separated by “ ”, as shown in Figure 2.
The marking for each part shall comply with the provisions of Table 1.
5.2.2 Marking examples
Examples of product markings for domestic solar water heating systems are as follows:
a) Example of a marking for a domestic solar water heating system using all glass evacuated tubes, with the heat transfer fluid inside the glass tubes, compact type, direct type, rated water capacity 150 L, contour aperture area 2.00 m², rated working pressure of the storage tank 0.05 MPa, and serial model number 1:
b) Example of a marking for a domestic solar water heating system using flat plates, with the heat transfer fluid inside metal tubes, split type, indirect type, rated water capacity 100 L, contour aperture area 1.80 m², rated working pressure of the storage tank 0.6 MPa, and serial model number 1:
6 Design and Installation Requirements
6.1 Components
Standard
GB/T 19141-2026 Specification of domestic solar water heating systems (English Version)
Standard No.
GB/T 19141-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
14500 words
Price(USD)
435.0
Implemented on
2026-8-1
Delivery
via email in 1~5 business day
Detail of GB/T 19141-2026
Standard No.
GB/T 19141-2026
English Name
Specification of domestic solar water heating systems
GB/T 19141-2026 Specification of domestic solar water heating systems English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 19141-2026
Specification of domestic solar water heating systems
家用太阳能热水系统技术条件
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Product Classification and Marking
6 Design and Installation Requirements
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Documentation
11 Packaging, Transport and Storage
Figure 1 — Schematic diagram of the contour aperture area of a solar collector
Figure 2 — Marking of a domestic solar water heating system
Figure 3 — Schematic diagram of the pressure test apparatus for the liquid working fluid of a domestic solar water heating system
Figure 4 — Schematic diagram of the stagnation test apparatus for a domestic solar water heating system
Figure 5 — Schematic diagram of the external thermal shock test apparatus for a domestic solar water heating system
Figure 6 — Schematic diagram of the rain test apparatus for a domestic solar water heating system
Figure 7 — Schematic diagram of the internal thermal shock test apparatus for a domestic solar water heating system
Figure 8 — Schematic diagram of the freezing test apparatus for a domestic solar water heating system
Table 1 — Provisions for marking each part of a domestic solar water heating system
Table 2 — Permissible deviation between the inner tank thickness of cold rolled stainless steel sheets and the nominal thickness
Technical specifications for domestic solar water heating systems
1 Scope
This document gives the terms and definitions, and symbols for domestic solar water heating systems, and specifies the product classification and marking, design and installation requirements, technical requirements, test methods, inspection rules, documentation, packaging, transport and storage.
This document applies to domestic solar water heating systems with a water storage tank capacity not greater than 0.6 m³.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 191 Packaging — Pictorial marking for handling of goods
GB 3100 International system of units (SI) and its application
GB/T 3280 Cold rolled stainless steel plate, sheet and strip
GB/T 4272 General principles of thermal insulation technique for equipment and pipes
GB/T 4706.1 Safety of household and similar electrical appliances — Part 1: General requirements
GB/T 4706.12 Safety of household and similar electrical appliances — Part 12: Particular requirements for storage water heaters
GB/T 4706.32 Safety of household and similar electrical appliances — Part 32: Particular requirements for heat pumps, air conditioners and dehumidifiers
GB/T 4706.66 Safety of household and similar electrical appliances — Part 66: Particular requirements for pumps
GB/T 6424 Flat plate solar collectors
GB 8877 Safety requirements for installation, use and maintenance of household and similar electrical appliances
GB/T 12936 Solar thermal utilization terminology
GB/T 13384 General specifications for packaging of mechanical and electrical products
GB/T 17049 All glass evacuated solar collector tubes
GB/T 17581 Evacued tube solar collectors
GB/T 18708 Test methods for thermal performance of domestic solar water heating systems
GB/T 19775 Glass to metal sealed heat pipe evacuated solar collector tubes
GB/T 19835 Self regulating electric heating cables
GB/T 23888 Controllers for domestic solar water heating systems
GB/T 23889 Technical specifications for domestic solar water heating systems with auxiliary heat pump
GB/T 25966 Technical specifications for domestic solar water heating systems with auxiliary electric energy
GB/T 25967 Test methods for thermal performance of domestic solar water heating systems with auxiliary energy
GB/T 26975 All glass heat pipe evacuated solar collector tubes
GB 50057 Design code for protection of structures against lightning
NB/T 10785 Test method for performance of domestic solar water heating systems under indoor solar simulation environment
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB 3100, GB/T 12936, GB/T 18708, GB/T 23889 and the following apply.
3.1 contour aperture area
The maximum effective area of a solar collector onto which sunlight is projected.
NOTE: As shown in Figure 1.
3.2 daily useful energy per contour aperture area of domestic solar water heating system
Under a certain solar irradiance, the daily useful energy per unit contour aperture area of the water in the water storage tank, when the water temperature in the tank is not lower than the specified value.
3.3 average heat loss factor of domestic solar water heating system
Under conditions of no solar irradiance, the average heat loss per unit time and per unit volume of the domestic solar water heating system when the temperature difference between the stored water in the system and the ambient temperature is 1 K.
3.4 pressure resistance
The ability of the water storage tank and the piping system through which water from the tank directly passes to withstand a certain pressure.
4 Symbols
The symbols given in GB/T 18708 and the following apply to this document.
A꜀ — Measured value of contour aperture area, m²
A꜀₁ — Nominal value of contour aperture area, m²
Cₚᵥ — Specific heat capacity of water, J/(kg·°C)
H — Daily solar irradiance, MJ/m²
m — Mass of water in the water storage tank, kg
q — Daily useful energy per unit contour aperture area of the domestic solar water heating system during the test, MJ/m²
q₁₇ — Daily useful energy per unit contour aperture area of the domestic solar water heating system when the solar irradiance is 17 MJ/m², MJ/m²
q’₁₇ — Daily useful energy per unit contour aperture area of the domestic solar water heating system when the solar irradiance is 17 MJ/m², kWh/m²
tբ — Temperature of the water in the water storage tank at the beginning of the heat collection test, °C
tₑ — Temperature of the water in the water storage tank at the end of the heat collection test, °C
tբ — Final temperature of the water in the water storage tank during the heat loss test, °C
tᵢ — Initial temperature of the water in the water storage tank during the heat loss test, °C
tₐₛ — Air temperature near the water storage tank, °C
t₁₇ — Final water temperature in the water storage tank when the solar irradiance is 17 MJ/m², °C
Uₛₗ — Average heat loss factor of the domestic solar water heating system, W/(m³·K)
V — Measured value of water volume in the water storage tank, m³
V₁ — Nominal value of water volume in the water storage tank, m³
v — Ambient air speed, m/s
ρᵥ — Density of water, kg/m³
ΔA꜀ — Deviation rate between the nominal and measured values of contour aperture area, dimensionless
ΔV — Deviation rate between the nominal and measured values of water volume in the water storage tank, dimensionless
Δτ — Time interval, s
(av) — Average value of a parameter
NOTE: (av) is used as a subscript.
5 Product Classification and Marking
5.1 Product classification
The classification of domestic solar water heating systems shall comply with GB/T 18708.
5.2 Product marking
5.2.1 Marking content
The product marking of a domestic solar water heating system consists of the following six parts, separated by “ ”, as shown in Figure 2.
The marking for each part shall comply with the provisions of Table 1.
5.2.2 Marking examples
Examples of product markings for domestic solar water heating systems are as follows:
a) Example of a marking for a domestic solar water heating system using all glass evacuated tubes, with the heat transfer fluid inside the glass tubes, compact type, direct type, rated water capacity 150 L, contour aperture area 2.00 m², rated working pressure of the storage tank 0.05 MPa, and serial model number 1:
b) Example of a marking for a domestic solar water heating system using flat plates, with the heat transfer fluid inside metal tubes, split type, indirect type, rated water capacity 100 L, contour aperture area 1.80 m², rated working pressure of the storage tank 0.6 MPa, and serial model number 1:
6 Design and Installation Requirements
6.1 Components
