GB 50364-2018 Technical standard for solar water heating system of civil buildings English
1 General provisions
1.0.1 This standard is formulated with a view to standardizing the design, installation, engineering acceptance, and daily maintenance of solar water heating system, and ensuring that the solar water heating system of civil buildings are safe, reliable, stable in performance, energy-saving and efficient, and in harmony with the buildings, thereby guaranteeing the engineering quality.
1.0.2 This standard is applicable to the design, installation, acceptance, and operation and maintenance of solar water heating system in newly constructed, extended and renovated civil buildings, as well as of that added or retrofitted in existing buildings.
1.0.3 The solar water heating system shall be incorporated into the management of building engineering, undergoing unified planning, simultaneous design and synchronous construction, and being put into service concurrently with the building engineering.
1.0.4 In addition to this standard, the application of solar water heating system in civil buildings shall also comply with those stipulated in the current relevant standards of the nation.
2 Terms
2.0.1 civil building
general term for buildings designed for human residence and public activities
2.0.2 solar water heating system
system device that converts solar energy into thermal energy to heat water, which consists of solar collectors, heat storage tanks, pumps, connecting pipelines, brackets, control systems, and auxiliary energy as necessary
2.0.3 collective-collective hot water supply system
system that employs collective solar collectors and collective heat storage tanks to supply hot water to a single or multiple buildings
2.0.4 collective-individual hot water supply system
system that employs collective solar collectors and individual heat storage tanks to supply hot water to a single building
2.0.5 individual-individual hot water supply system
small-scale system that employs individual solar collectors and individual heat storage tanks to supply hot water to individual consumers
2.0.6 solar direct system
solar water heating system that directly heats water in the solar collector for consumers
2.0.7 solar indirect system
solar water heating system that heats a certain heat transfer fluid in the solar collector and then uses this fluid to heat water for the consumers through a heat exchanger
2.0.8 natural circulation system
solar water heating system that solely utilizes the density changes within the heat transfer fluid to achieve circulation between the collector and the heat storage tank or between the collector and the heat exchanger
2.0.9 forced circulation system; mechanical circulation system
solar water heating system that employs a pump to force the heat transfer fluid to circulate through the collector (or heat exchanger)
2.0.10 series-connected system
non-circulating solar water heating system where the heat transfer fluid flows through the collector once for heating and then enters either the heat storage tank or the point of hot water use
2.0.11 evacuated tube collector
solar collector employing transparent tubes (typically glass tubes) with a vacuum space maintained between the tube wall and the absorber
2.0.12 flat plate collector
non-concentrating solar collector with a generally flat-shaped absorber surface
2.0.13 gross collector area
maximum projected area (m2) of the entire collector, excluding components for mounting and connecting the heat transfer fluid pipelines
2.0.14 tilt angle of collector
angle between the solar collector and the horizontal plane
2.0.15 heat storage tank
device in a solar water heating system for storing hot water
2.0.16 buffer tank
storage device installed between the collective solar collectors and the individual heat storage tanks in a collective-individual hot water supply system
2.0.17 cost/benefit ratio of the system
ratio of the additional investment in a solar water heating system to the total energy savings over its normal service life, representing the investment cost per unit of conventional energy heat saved through solar energy utilization (in CNY/kWh)
2.0.18 solar irradiation
areal density of solar radiation energy received (in kWh/m2)
2.0.19 solar fraction
percentage of the heat provided by the solar energy portion in the system out of the total system load
2.0.20 integration of building with solar water heating system
incorporation of the solar water heating system into the architectural design so that it becomes an integral part of the building, maintaining harmony between the building's appearance and internal functionality
2.0.21 sunlight standards
sunlight duration time for the exterior windows of a building within the period of effective sunlight on designated reference days of sunlight assessment (Winter Solstice or Great Cold), which is determined based on the climatic zone where the building is located, the size of the city, and the intended use of the building, with the sill level of the ground-floor windows as the reference position for sunlight assessment
Contents
1 General provisions
2 Terms
3 Basic requirements
4 Architectural design
4.1 General requirements
4.2 Architectural design
5 Design of solar water heating system
5.1 General requirements
5.2 System classification and selection
5.3 Technical requirements
5.4 Solar collector system
5.5 Hot water supply system
5.6 Auxiliary energy system
5.7 Electric and control system
6 Installation of solar water heating system
6.1 General requirements
6.2 Base
6.3 Bracket
6.4 Solar collector
6.5 Heat storage tank
6.6 Pipeline
6.7 Auxiliary energy heating equipment
6.8 Electric and control system
6.9 Hydrostatic test and rinse
7 Commissioning and acceptance of solar water heating system
7.1 General requirements
7.2 Sub-project acceptance
7.3 System commissioning
7.4 Completion acceptance
8 Operation and maintenance of solar water heating system
8.1 General requirements
8.2 Operation and maintenance of collector system
8.3 Operation and maintenance of heat storage system
8.4 Operation and maintenance of pipe circulation system
8.5 Operation and maintenance of control system
8.6 Operation and maintenance of auxiliary heating system
9 Evaluation on energy efficiency and environmental benefits
9.1 General requirements
9.2 Evaluation on system energy efficiency and environmental benefits
9.3 Evaluation on system practical operation benefits
9.4 Periodic testing, long-term monitoring and performance grading assessment of system
Annex A Solar energy resource data for some major cities
Annex B Calculation method for annual average heat collection efficiency of solar collectors
Annex C Gross solar collector area compensation ratios at different tilt angles and azimuths for some representative cities
Annex D Calculation method for structure of solar collectors
Explanation of wording in this standard
List of quoted standards
Explanation of provisions
GB 50364-2018 Technical standard for solar water heating system of civil buildings English
1 General provisions
1.0.1 This standard is formulated with a view to standardizing the design, installation, engineering acceptance, and daily maintenance of solar water heating system, and ensuring that the solar water heating system of civil buildings are safe, reliable, stable in performance, energy-saving and efficient, and in harmony with the buildings, thereby guaranteeing the engineering quality.
1.0.2 This standard is applicable to the design, installation, acceptance, and operation and maintenance of solar water heating system in newly constructed, extended and renovated civil buildings, as well as of that added or retrofitted in existing buildings.
1.0.3 The solar water heating system shall be incorporated into the management of building engineering, undergoing unified planning, simultaneous design and synchronous construction, and being put into service concurrently with the building engineering.
1.0.4 In addition to this standard, the application of solar water heating system in civil buildings shall also comply with those stipulated in the current relevant standards of the nation.
2 Terms
2.0.1 civil building
general term for buildings designed for human residence and public activities
2.0.2 solar water heating system
system device that converts solar energy into thermal energy to heat water, which consists of solar collectors, heat storage tanks, pumps, connecting pipelines, brackets, control systems, and auxiliary energy as necessary
2.0.3 collective-collective hot water supply system
system that employs collective solar collectors and collective heat storage tanks to supply hot water to a single or multiple buildings
2.0.4 collective-individual hot water supply system
system that employs collective solar collectors and individual heat storage tanks to supply hot water to a single building
2.0.5 individual-individual hot water supply system
small-scale system that employs individual solar collectors and individual heat storage tanks to supply hot water to individual consumers
2.0.6 solar direct system
solar water heating system that directly heats water in the solar collector for consumers
2.0.7 solar indirect system
solar water heating system that heats a certain heat transfer fluid in the solar collector and then uses this fluid to heat water for the consumers through a heat exchanger
2.0.8 natural circulation system
solar water heating system that solely utilizes the density changes within the heat transfer fluid to achieve circulation between the collector and the heat storage tank or between the collector and the heat exchanger
2.0.9 forced circulation system; mechanical circulation system
solar water heating system that employs a pump to force the heat transfer fluid to circulate through the collector (or heat exchanger)
2.0.10 series-connected system
non-circulating solar water heating system where the heat transfer fluid flows through the collector once for heating and then enters either the heat storage tank or the point of hot water use
2.0.11 evacuated tube collector
solar collector employing transparent tubes (typically glass tubes) with a vacuum space maintained between the tube wall and the absorber
2.0.12 flat plate collector
non-concentrating solar collector with a generally flat-shaped absorber surface
2.0.13 gross collector area
maximum projected area (m2) of the entire collector, excluding components for mounting and connecting the heat transfer fluid pipelines
2.0.14 tilt angle of collector
angle between the solar collector and the horizontal plane
2.0.15 heat storage tank
device in a solar water heating system for storing hot water
2.0.16 buffer tank
storage device installed between the collective solar collectors and the individual heat storage tanks in a collective-individual hot water supply system
2.0.17 cost/benefit ratio of the system
ratio of the additional investment in a solar water heating system to the total energy savings over its normal service life, representing the investment cost per unit of conventional energy heat saved through solar energy utilization (in CNY/kWh)
2.0.18 solar irradiation
areal density of solar radiation energy received (in kWh/m2)
2.0.19 solar fraction
percentage of the heat provided by the solar energy portion in the system out of the total system load
2.0.20 integration of building with solar water heating system
incorporation of the solar water heating system into the architectural design so that it becomes an integral part of the building, maintaining harmony between the building's appearance and internal functionality
2.0.21 sunlight standards
sunlight duration time for the exterior windows of a building within the period of effective sunlight on designated reference days of sunlight assessment (Winter Solstice or Great Cold), which is determined based on the climatic zone where the building is located, the size of the city, and the intended use of the building, with the sill level of the ground-floor windows as the reference position for sunlight assessment
Contents of GB 50364-2018
Contents
1 General provisions
2 Terms
3 Basic requirements
4 Architectural design
4.1 General requirements
4.2 Architectural design
5 Design of solar water heating system
5.1 General requirements
5.2 System classification and selection
5.3 Technical requirements
5.4 Solar collector system
5.5 Hot water supply system
5.6 Auxiliary energy system
5.7 Electric and control system
6 Installation of solar water heating system
6.1 General requirements
6.2 Base
6.3 Bracket
6.4 Solar collector
6.5 Heat storage tank
6.6 Pipeline
6.7 Auxiliary energy heating equipment
6.8 Electric and control system
6.9 Hydrostatic test and rinse
7 Commissioning and acceptance of solar water heating system
7.1 General requirements
7.2 Sub-project acceptance
7.3 System commissioning
7.4 Completion acceptance
8 Operation and maintenance of solar water heating system
8.1 General requirements
8.2 Operation and maintenance of collector system
8.3 Operation and maintenance of heat storage system
8.4 Operation and maintenance of pipe circulation system
8.5 Operation and maintenance of control system
8.6 Operation and maintenance of auxiliary heating system
9 Evaluation on energy efficiency and environmental benefits
9.1 General requirements
9.2 Evaluation on system energy efficiency and environmental benefits
9.3 Evaluation on system practical operation benefits
9.4 Periodic testing, long-term monitoring and performance grading assessment of system
Annex A Solar energy resource data for some major cities
Annex B Calculation method for annual average heat collection efficiency of solar collectors
Annex C Gross solar collector area compensation ratios at different tilt angles and azimuths for some representative cities
Annex D Calculation method for structure of solar collectors
Explanation of wording in this standard
List of quoted standards
Explanation of provisions
